>is in 6th gear
>puts pedal to floor to accelerate
>5 forward gears
>1 reverse gear
>5+1=6
>shift into 6th gear to accelerate
>>14101180
I accidentally did this in 5th for about 1k rpm
>Why am I at full boost and not going anywhere?
>OH SHIT NIGGER WHAT AM I DOING
Thankfully, I only went from 2.5k to around 3.3k. Some people datalogged a full 6th gear pull and asked why their car was pulling 6 degrees of timing and their egts were at nearly 1900.
>>14101180
>>14101217
wait whats wrong with doing this
>>14101234
Nothing. They are going to tell you it hurts the car but it's really just a meme /o/ circle jerk to feel like they know everything about cars. At most it does incredibly minute wear.
>>14101180
>it's in 5th gear
>feels like 3rd so you go to shift into 5th
>rpm doesn't drop because you're a fuckhead
>in 6th gear
>puts pedal to the floor to accelerate
>automatic transmission downshifts and gives you optimum gear.
>>14101245
you have to downshift to accelerate?
what the fuck
Wait why is this a big deal? If rpms are high enough it shouldn't make a difference besides slower acceleration.
e.g. my car hovers around 2.1K at 65, never has an issue pulling in 6th, of course this on a flat surface
>>14101245
manualhipsters BTFO
>>14101264
it doesnt make sense
shouldnt higher gear mean you go faster?
>>14101241
tell that to like half of Mazdaspeed3 owners
>>14101267
A higher gear means that your vehicle is in a higher band of speed, yes. Not that it will gain speed faster.
>>14101234
In an auto, nothing because it will kick down. In a manual, I just fucking told you why you dumbass.
5th gear is typically the overdrive gear, it's not meant to be accelerated in except lightly because it puts such a huge load on the engine. Do you know why the car is pulling so much timing? Because it's fucking knocking like crazy due to absurd amounts of heat in the combustion chamber and then all of that heat gets sent straight to your exhaust where the catalytic converter gets it all. EGT stands for exhaust gas temperature and 1900 is in Fahrenheit. That's enough to melt your cats and if you are running high boost you could potentially blow your engine if you follow through with your retarded antics.
>>14101253
dude fucking epic im posting thios on /r/4chan XD
>>14101267
I know this is b8 but cars make more power at higher rpms. you shift from 5 to 4 to get into the powerband
>>14101283
*5th and/or 6th
High gear low rpm pulls on boosted cars can result in the turbo shoving more air through the engine the it can handle. Higher cylinder pressures than the internals were designed for then boom! This is only a real problem on modded cars , most stock tunes acount for this and are engineered to not let it happen
>>14101289
its not b8
and oh
i wish there was a more comprehensive thing
>>14101300
>most stock tunes acount for this and are engineered to not let it happen
It will still happen, the ecu will just pull fuck loads of timing but it can't do that until it detects knock and if you continue to do it you're pretty much beating the shit out of your engine for not a lot of fun.
If you're going to beat on your car, at least do it on the back roads where you're having fun. Not trying to pass some 18 wheeler on the highway. The top of 4th is still less stress than WOT at 5th at peak power.
>>14101325
Not him but does this count for N/A or only boosted cars?
>>14101330
just boosted ones
This is why I cruise at 3500rpm in my mom's car, fucking instant torque without downshifting.
>>14101330
Both, forced induction just exasperates the issue. Unless your engine can deal with all of that heat without knocking itself out (literally) then you have no business going WOT in your overdrive gear. Your driving gears can probably take you all the way to 120+ before needing to shift anyway. Why risk pre-detonation and excess wear (not to mention accelerating SLOW) by doing it in your overdrive gear?
Do you have colder sparkplugs? No? Don't do it.
Do you have a high flow or catless exhaust? No? Don't do it.
>>14101253
>>14101245
>There are people who post on /o/ who cant drive stick
>They are the one who talk the most shit
>>14101372
What a bunch of bullshit.
>>14101372
this, the 4th gear on my moms car will do like 130mpg when revved out, and when its in it's torque sweetspot, it's doing 75mph.
>>14101390
130mph*
>>14101390
with that fuel econ, i would only rev the shit out of it
>>14101325
>>14101300
you guys are literally fucking retarded.. stop typing
Can I get a SINGLE source on all this bullshit?
>>14101300
>High gear low rpm pulls on boosted cars can result in the turbo shoving more air through the engine the it can handle.
this is the dumbest thing i've ever read. you ever heard of a wastegate bud?
So... is everyone else driving cars with little tiny turbos and no wastegate?
If an engine is "knocking like crazy", you'll hear it.
The only reason to avoid high load at low RPM is lack of oil pressure on the rod bearings. Everything else you hear in this thread is a bunch of paranoid bullshit for anything but the most temperamental (or poorly-tuned) cars.
>>14101396
no theyre retarded anime watcing teenagers talking out of their ass.
see: https://en.wikipedia.org/wiki/Wastegate
>>14101399
>>14101403
Plz use your Googlefu to look up overboosting then come back
>>14101401
>the only reason
Mazdaspeed3 (stock) will blow out all the seals on the shitty turbos that they came with stock if you boost below a certain rpm constantly. they'll start to burn oil etc. this isn't a myth
>>14101443
you're a fucking moron.
>>14101401
You can tell this guy has never been involved with tuning a single car.
>>14101403
>>14101399
It's mostly just heat from the turbo going into the cylinders unless you have an amazing intercooler and even then you're still introducing higher than average heat into the engine. Ignoring that, even on an NA car putting that much load on the engine will cause predetonation. All cars knock, some more than others. The ECU will try to minimize it but the fact is all cars knock, not just "poorly tuned ones" because that kid wants to feel better about himself by assuming his car is da bes, like a typical honda fag.
It's pretty common knowledge in the motoring world to not lug your engine
>>14101466
Calls everyone stupid. Posts nothing to back up his claims lolololol
>>14101234
Bent rods, it's a problem with the mazdaspeed3
>>14101491
Dude, you're a fucking idiot and don't know what you're talking about. Stop fucking typing.
This is honestly sad. You should be embarrassed but your too retarded to realize how wrong you are.
I hope for your sake that you're trolling.
>>14101495
a wastegate controls boost level.
thats why they exist. you're fucking stupid.
>>14101491
Literally some of the dumbest level of bullshit I've ever read... wow. Got ANY for of anything to back said bullshit?
>>14101491
>he thinks all cars detonate
>he thinks wastegates dont exist
>he thinks timing retards with load
>he thinks WOT at low rpm is lugging
>he thinking going WOT at low rpm is somehow different for the turbo than WOT at high rpm
you are THIS dumb
>>14101543
wut
>>14101234
stall
LSPI, mazdaspeed's (and to a lesser extent ecoboost) best friend.
http://stratifiedauto.com/blog/low-speed-pre-ignition-in-the-mazdaspeed-disi-and-ford-ecoboost-motors/
>>14101283
this is the stupidest bro-science bullshit i've ever heard LMAO
>>14101325
im redlining at 60 in 4th gear to do 70 i have to be in od
>>14101593
>Meanwhile, in 1984
>>14101579
this is specifically related to direct injection and poor tuning in the early versions of the car. it has NOTHING to do with anything other than the MS3 and MS6
>>14101593
>im redlining at 60
my gm 1.6 shitbox redlines at 50 in 1st gear, i don't even know what the fuck could you possibly drive
> tfw low compression v8
No problems here with doing that
>>14101180
>its in 6th gear
>Push pedal
>it actually accelrates and passes the car in the other lane.
thats because I have torque.
>>14101605
a pickup
>>14101593
Do you also drive a Ford ranger?
>>14101325
WOT at 5k in 4th is the exact same as WOT at 3k in 5th.
THE. EXACT. SAME. LOAD.
>>14101602
Early versions had problems, but that's what happens at high load low rpm (aka flooring it in 5th/6th). Pretty much all FI cars will experience that if you don't shift down. The article referenced is about MS3's randomly getting superknock while cruising on the highway and shattering pistons because of mechanical issues.
>>14101627
Show me
>>14101623
gmc sierra slx
>>14101628
LOAD means manifold pressure. It has nothing to do with gear ratio or how much weight you're towing or anything like that.
LOAD = tps
nothing more. you're dumb.
>v8
>gm 4sp auto
>never ever leave 4th gear turns about 1k rpm on the highway just above idle
Low-Midrange Torque > HP
I hate revvy engines give me a big lazy v8 thats suprisingly fuel efficent considering its 15 years old with 150k miles on it, uses less than a 2.0l i4 and 4l i6 on the highway stock tune
>>14101672
Load isn't just manifold pressure. It is an algorithm of speed, density and throttle position. Also your post points out that load is nothing but inlet manifold pressure, then goes on to say it is nothing but equal to the throttle position sensor. Make up your mind which incorrect assumption you wish to repeat.
>>14101627
Not on the transmission. 4th is a direct gear in most transmissions with 5th being an overdriven gear. With an overdriven gear, the driven gear is put under exponentially increasing stress.
And further again, no it will not be the exact same load because the powerplant's volumetric efficiency at 5k will be markedly different to the ve at 3k. The motor will be in very different places on the trim maps at those two intervals you mentioned.
EVERYONE STOP
CALL EVERY TUNER IN THE WORLD AND LET THEM KNOW TO STOP DOING 4TH GEAR WOT DYNO PULLS FROM 1.5K RPM
WE COULD SAVE COUNTLESS ENGINES
>>14101719
>M 1.5K RPM
No one starts at 1.5k you fucking maniac. What the hell is wrong with you? It's not even 4th gear, it's whatever is closest to 1:1.
>>14101716
Load is manifold pressure. also known as speed density. or throttle position. they are all the same thing
You're fucking stupid and have never tuned a car. Please stop talking.
/thread
>>14101736
Maybe if you tune with Fisher Price.
You can get as upset as you wish. Load is not manifold pressure. Load is an algorithm of speed, density and tps.
I had an ECU that called manifold pressure load once. It was a Stinger 4424 V2 in 2001.
>>14101736
Speed is engine speed
Density is the density of the air in the manifold
Throttle position is an electrical reading of the shaft rotation in the throttle body.
So a car that has a speed density tune is a 2d tuning table that the x axis (or y, your call) is engine speed and the other axis will be air density.
You are silly.
>>14101730
typical starting point is somewhere around 2k
so lets recap,
-youve never been on a dyno
-youve never tuned a car
>>14101283
HOW DO I KNOW THE EGT IN MUH CARR
>>14101763
nooooo shit
tuning with 'speed density' (colloquial) assumes you are using tps or manifold pressure or an algorithm of the two. rather than mass air flow.
you fucking idiot.
>>14101778
I start at 1K!
....but my redline is 4k
>>14101782
Get an EGT gauge and a K-type thermocouple. A good kit will have a threaded bung for the thermocouple that will be welded onto the exhaust pipe over a hole for the probe.
>>14101778
No it isn't, it's 2.5k to 3k
Who the fuck starts at 2k?
>>14101782
If your car has a sensor, a tuning device will tell you. You will almost never care about this unless you're running a significant amount of boost or you track your car Or if you go WOT in fucking 6th gear.
>>14101605
Bullshit. Maybe kms
>>14101791
There is nothing colloquial about a speed density tune, you mongoloid.
I hope you are a different anon. First post is completely wrong, calling three explicit variables the same thing. Next post is 'no shit, here are some completely unrelated words.'
If you are the same anon, I have message. You have two ears and one mouth. Use them in that ratio.
Doesn't do anything for your silly fingers though.
>pulling from 2.5k to 6k in an overdrive gear will blow your engine
Too many fucking idiots in this thread who are changing goal posts and changing the subject to avoid getting called out on their stupidity.
>there's more load on a car in 6th than 5th!
Fucking retarded.
>>14101809
Sorry dude, you're fucking retarded.
Go back to /sci/ or wherever you pretend to be an engineer.
Here it won't get you as far.
>>14101813
But there is. Why does this fact escape you?
Does torque multiplication confuse you? The higher the overdrive, the higher the load on the drive gear versus the driven gear.
>>14101819
That's amusing. So now you have gone from mashing words together, to ignoring your own stupidity, to this dribble.
You are a nothing, and your internet identity is unfortunately as stupid as your real one.
Again, load is not manifold pressure. Throttle position sensor is not an anagram for manifold pressure. There is nothing colloquial about a speed density tune.
You are pitiful.
>>14101798
That's not what EGTs are used for lol. EGTs monitor A:F nothing more. They are useful in multi cylinder engines with multiple gauges, not just one single one.
And EGT isn't going to tell you anything other than how the fuel is mixing in a certain cylinder compared to another
>>14101834
Wow.
Stop speaking. Please.
Exhaust gas temperature gauges monitor air fuel ratio.
A temperature gauge monitors lambda.
Fuck.
They are also useful for taking an approximation of how much heat the turbocharger and other downstream components are being exposed to.
>>14101830
>Load is not manifold pressure
Yes it is
>There is nothing colloquial about a speed density
lol
>The term “Speed Density” typically refers to the operation of an engine using an estimation of airflow based on pressure
>term
>based on pressure (load)
>>14101830
>The higher the overdrive, the higher the load on the drive gear versus the driven gear.
And?? lmao
Face it dude, you're playing pretend engineer on the internet and you accidentally ran into a couple people who know you're full of shit. Just let it go you absolute spastic.
>in 6th gear on the highway
>80mph is about 3500RPM
is there anything wrong with accelerating lightly within the gear to pass someone or do you really have to shift down to just go to 85 or so and then quickly go back down to 80?
![kill[1].jpg~c200.jpg](https://i.imgur.com/BFoscVC.jpg "kill[1].jpg~c200.jpg")
>>14101843
>He doesn't know that an EGTs use is for A:F burn not for an actual temp reading
LOL
this conversation is over.
>>14101896
you're a dumbass
>>14101865
No, I haven't. You certainly do not know what you are talking about.
Colloquial doesn't mean a term, you dingus. It means slang. Speed density is not slang.
Again, for your simple malfunctioning grey matter; engine load is an algorithm of speed, density and throttle position.
If you were correct, would it not be impossible to have one hundred percent load at low engine speed.
Why is this possible? Why can any engine be exposed to one hundred percent load without reaching target boost?
Could it be that manifold pressure is not load, but one of the factors that dictate load?
You are a nothing, and it appears this is what your head is full of.
>>14101896
That is a use. Not the most ideal, as if I increase the valve overlap of an engine I will observe a reduction in exhaust temperature without any change to AF ratio.
>>14101905
Now he's samefagging, LOL
Sorry dude, back to /sci/, play pretend engineer there.
EGT gauge measures temp.
AFR gauge measures lambda.
This thread is gay
You are all a bunch of faggots that don't know what the fuck you're talking about
>>14101935
Thanks for your valuable addition. Fuck off and die.
>>14101928
Lemme expand on this.
Yes you can get an idea of the AFR from an EGT gauge but its still measuring the fucking EXHAUST GAS TEMPERATURE.
>>14101180
I floor it in 6th gear if I'm above 3k RPM. Which is where most of my torque is. Above 3k RPM 6th gear in my car is 85-90mph.
Once thing I love about my car is that it's geared well. I can be going 50mph in 6th gear, roll on the throttle just a bit and pass someone relatively quickly.
>>14101491
Ah, you caught me. I'm a fraud.
I'm sorry /o/, I have failed you.
>>14101896
What. Dude you're wrong
Tell me how a K type thermocouple measures AFR.
>>14101865
Actually let me add another seemingly obvious example that anyone with two brain cells should have considered.
Let's assume you have access to a consult port. Let us assume that you have a turbocharged vehicle where target boost is one bar.
You observe the engine to be at 20% load at idle, 0V tps. You place a significant electrical load on the alternator and engine speed reduces.
Engine speed returns to target idle. The manifold vacuum is identical to the first reading. You are now under 25% load.
What happened? Density didn't change, but the load did.
Could it be that density is but one factor in dictating load?
>>14101283
>having catalytic converters
>having boost
>having 5th gear
>>14101970
Garage looks comfy man. MX-5 on the left with a snail?
>>14101989
Bah, right. Not left. Very much not an MX-5 on the left.
>>14101180
Problem?
>>14102001
Fuck off with this 9gag lolmaysayssofunny
shit
>>14101986
I miss my small block man. It had boost, and a fifth gear! But no cat still.
>>14101989
Yep, turbo roller skate, no interior, twin-plate clutch, etc etc. Really too aggressive for its own good, but it makes me feel like a fighter pilot. The 3 is my summer daily. Got a shitbox Protege too.
>>14101278
Well they bought a mazda 3 so they dont make good decisions anyway.
>>14101980
1 bar is 100kpa = no boost
I'll assume you meant 2 bar and ill continue reading anyway.
What you're describing is an impossibility. The manifold pressure would be less because the idle control would increase air and fuel to maintain the desired rpm.
And yes for all the other idiots out there an EGTs main purpose is for measuring fuel burn.
>>14101971
read wikipedia.
>>14101986
>implying i have cadillac converters
>implying i have boost
>not having 5th or 6th gear. check urself b4 u wreck urself.
>>14102020
purty
>>14102024
poor taste. mazda 3 is the best shitbox of the past 10 years
>>14102024
This. Should've bought a Focus.
>>14102034
No, Tell me how you get an AFR reading directly from a K type thermocouple.
(hint: you don't) Just because you can use it to estimate an AFR it still measures EXHAUST GAS TEMPERATURE.
Here, go read wikipedia yourself
A thermocouple is an electrical device consisting of two different conductors forming electrical junctions at differing temperatures. A thermocouple produces a temperature-dependent voltage as a result of the thermoelectric effect, and this voltage can be interpreted to measure temperature. Thermocouples are a widely used type of temperature sensor.[1]
>>14102020
That's cool man, looks great. Did you open the motor up or is it still sealed from the factory? Turbocharger wise, what did you settle with?
I managed a business fleet that had four Mazda 3's mixed in, and they were very reliable without the issues some of the other vehicles had. Especially the D40 Nissan Navaras that were in the fleet, very poor fit and finish.
>>14102034
Target boost is one bar. If target manifold pressure was one bar, then you would be correct.
But it's not, and neither are you.
And it's not impossible. It is what you will notice if you follow the above steps.
And no, the manifold pressure would not measurably be less. I'm not sure about you, but any petrol motor that I have access to the brain will not drop an inch of mercury from iac open to closed. I can on occasion move from sixteen inches of mercury to fifteen and 8 poofteenths by opening the iac on my daily.
Maybe if you had experience tuning a vehicle and altering aic cycle you may have come across this.
>>14102043
Lmaooo. Mazda hasn't been the best at anything for a long time.
>>14101403
>complaining about anime on an anime image board
>>14102048
You are one stupid mother fucker..
>At a stoichiometric air-fuel ratio, the exhaust gas temperature is different from that in a lean or rich air-fuel ratio. At rich air-fuel ratio, the exhaust gas temperature either increases or decreases depending on the fuel.
That's why you use them on multiple cylinders! yayyyy. Now stop derailing.
And stop calling it a k type thermocouple you sound like a fucking spastic.
>>14102069
the entire concept of a iac works on manifold pressure so you're fucking retard lol
>>14102075
I'm assuming by you calling this anon a spastic that you are the spastic from above that thinks load is manifold pressure.
Pot calling the kettle spastic there.
Although this guy is a little spastic. Again, I increase the valve overlap of an engine I will observe a reduction in exhaust temperature without any change to AF ratio.
![1423093773793[2].jpg](https://i.imgur.com/txeEFEk.jpg "1423093773793[2].jpg")
>>14102073
>gets easily triggered on a korean shitpost practising forum
>>14102085
The entire concept of an IAC is to allow additional air to enter the intake manifold. It is rare that fuel will be changed as a result.
It is rare that inlet manifold pressure will be measurably reduced by the IAC. Go an change your IAC duty and report back your findings.
>>14102086
>I increase the valve overlap of an engine I will observe a reduction in exhaust temperature without any change to AF ratio.
And??????
You're comparing cylinder to cylinder.. this is the modern use of egt.
>>14102069
is this ship wanker? i like your posts :3
>>14102106
Nonsense. The most widely accepted use of exhaust gas temperature sensors is in OEM situations where it will be measured against a target exhaust temperature. Exceeding target results in either a trim being applied or a fault being logged.
They are also extremely common in diesel applications. Much can be discerned from the exhaust gas temperature pre and post turbine.
>>14102075
>The exhaust gas temperature is different from that in a lean and rich.
I never said it isn't.
YOU ARENT MEASURING THE AFR, YOU'RE MEASURING THE TEMP AND THEN ESTIMATING THE AFR.
How is this hard to understand?
>>14101199
yeah gearboxes are designed such that this never really happens. have you ever tried it?
>>14102102
Dude.. this is the last time I'm replying to you.
If the idle control bypasses the throttle body you won't get a manifold reading, but that means nothing.
It's still changing the AFR you just aren't reading it because of the position of the sensor.
Please go away.
>>14102111
One and the same! Still wanking ships, still sailing with a ship full of Papua.
Got a clean pair of turbos last week though, happy days.
>>14102139
First you are upset that IAC duty will not change inlet manifold pressure. This is a sticking point for you.
Now you are upset at me because it will change the air fuel ratio, though I make no mention of this.
Of course it will, you are adding additional oxygen. This is fundamental.
Please, go away.
>>14102069
Engine is out of an '02, you can see the cam phasing gear on the intake side. It has Supertech valve springs/cam followers, opened up ports, blueprinted billet steel oil pump, '94-'00 factory head gasket reversion, Manley connecting rods, ACL "Full Race" bearings, ARP head/main studs, full contact Teflon crank scraper, Maruha adjustable exhaust cam gear, Maruha oil baffle, 949 Racing harmonic balancer and trigger wheel, plus the shit bolted to the outside and probably some other crap I'm forgetting. It's getting the LS2 sequential ignition setup this winter.
Turbo is a GT2560R with the FM 3" exhaust. Used to have a 2554 and 2.5" exhaust but 1) power delivery was too front loaded, and 2) the 54mm wasn't doing anything but puffing hot air in the summer.
>>14102146
And if your map sensor was at the intake port you would get a reading (indicating change of load). So you're wrong (as usual)
>>14101307
>more comprehensive
literally the higher RPM the faster you accelerate, and the higher gear you're in the higher speed you're going.
>>14102197
Awesome man, that's a great build. Well done.
On a different application I had a GT2554. It certainly puts out the hot air over pr of 1.
>>14102217
Are you saying if you put a map sensor at the intake port, nearest the inlet valve, that I would measure a change in manifold pressure with IAC operation?
Or did you mean nearest the throttle body and just fucked up your words as done all thread? You can put the map sensor wherever you like, the inertia of air is quite low and you will have the same reading regardless of whether the map is hugging the nuts of the throttle body or located smack bang in the middle of the plenum.
That is not only far off the mark, but so far off the mark it is impressive.
Once again, I invite you to go and make a change on your ECU and increase the pulse width to your IAC by the highest factor your ECU has. Take a quick screenshot at the difference in manifold pressure you don't measure.
That assumes you have a car, a fuel injected motor, a stand alone ecu and half a clue.
>>14102217
Although really if you had an ECU and what not, you would notice that you can induce 100% load early in the rev range without either 100% tps or 100% volumetric efficiency.
And if you had any of these things, half a clue included, you may possible not be typing the insane dribble you are now.
>>14102242
You wont measure a difference because the IAC bypasses the throttle body where pressure is measured... Holy shit you're fucking retarded.
If the IAC actuated the throttle body (like some of them do) you would absolute see a difference in MAP (and TPS as well since they measure the same thing as I said earlier but you refuse to believe)
It's getting pretty sad at this point.
>>14102224
so why doesnt 6th speed go fast?
>>14102250
>Although really if you had an ECU and what not, you would notice that you can induce 100% load early in the rev range without either 100% tps or 100% volumetric efficiency.
This is an absolute nonsensical sentence.
>>14102272
Intake pressure change, not tps change you utter fool.
>>14102289
It is true. Go and try it.
>>14102289
I thought perhaps you were right, and all I had been taught and all I had observed was wrong.
But then I just grabbed the standby and smashed the governer to the limit and hey, DDEC reported 100% load before target boost was reached.
It's a good thing the real world works in a predictable manner.
dumb fucking niggers always doing dumb fucking shit
>>14101180
>relax bitch, I got 350ft'lbs available at 1500rpm
>>14102289
Just popped out to the work car while we are berthed, Toyota vdj79. I can induce 100 load at 40 tps at 4 inches of mercury.
>>14102390
>"inducing load"
Kids these days with their CAN/OBD ECUs
>>14102403
What does this post mean? That you need to be one under the age limit with a canbus ecu to put an engine under load?
>>14102328
Here's a question for you.
your engine idling, 20kpa, 0%tps, no idle control at all. What do you need to do to keep it running and what sensor readings will change?
Now are you still going to tell me that map doesn't measure load regardless of rpm?
>>14102390
not the same kind of load
>"Load" is a poorly defined and ambiguous term used far too much to mean different things to different people. To me it has one of two usual meanings:
1) Dimensionless. A combination of engine input settings to provide a proportion of the available shaft torque for a given engine speed. Correlated with pedal position (driver demand) in a vehicle. Although continuous, "zero", "part" and "full" are the three most common values used. Modern engine control systems may attempt to make the correlation linear, or at least feel linear.
2) Dimensioned. BMEP. Precisely defined. Normalised for engine size & type, but its range is speed-dependent.
>>14102446
If it is idling then no change needs to happen. If I wish to raise idle I can do so by adding air flow, small enough that the map will not sense it.
I am not going to tell you the map will not sense load. I have not done this at all. I am telling you a simple fact. Load is an algorithm of speed, density and tps. The map is but one variable.
I truly don't mind if you think otherwise. There are those who think the earth is flat.
>going 75 mph in 6th gear
>want to get to 80 mph and pass some dingus
you're really expecting me to downshift?
What the fuck is this thread?
>>14102272
>If the IAC actuated the throttle body (like some of them do) you would absolute see a difference in MAP
Idle air, whether via TB actuation or IAC valve will net the same effect regardless of how the idle air is controlled.
>>14102477
I'm afraid that it is exactly the same load being discussed throughout the thread. What does the ecu interpret as load? I state again with certainty that it is not just the manifold pressure. Surely anyone, canbus or not, can simply view the load during normal operation and the intake manifold pressure and notice the link that they have, but that the two are displaying completely different information?
BMEP per cylinder and effective pressure is displayed in some marine ecus next to load in percentage.
>>14102509
wrong. the load won't change as the rpm goes up.
What weak fucking shit cars are you faggots driving?
My XR6T could not give less of a shit if you want to pull up at 1500rpm with full boost for 2 fucking hours.
>>14101283
>cars with no torque can't accelerate in top gear
>knocking
Lol its pulling timing to prevent that...
>>14102561
We're talking about lugging the engine you cocksmoocher
>>14102537
No one debated that
>>14102544
It will when it reaches target rpm, as load will decrease as the engine requires less power due to it holding rpm, not accelerating.
I'm not sure what point you are trying to make here.
Load is not simply psi-g.
>>14102587
at which point you will reduce throttle.
>>14102242
Thanks breh, I'm proud of it.
>>14102568
lugging the engine is when its barely running and it's shocking the whole drive train with vibration.
>>14102598
I may not. Did I apply only enough to raise and hold, or did I apply enough to raise, overshoot and drop back?
It doesn't really matter, since downshifting will bump the RPM up to relatively the same
>>14101283
>Having to put your foot down to the floor in 6th gear to accelerate
I just gotta give me about quarter throttle climbing Grandfather mountain going across the NC/VA state line in 6th to accelerate. You niggas need some torque.
>>14102618
the only way to hold rpm is to reduce load not the other way around.
in your magical world when a car tops out at 60mph at half throttle because it doesn't have enough power to punch through anymore air pressure it's at max load. but it isn't, it's at 50%
>>14102668
Your statement is confusing. You are saying the only way to neither increase or decrease rpm is to lower expected load.
Sit and rethink that one for a little.
Your example is flawed. It will be at whatever load you have demanded. If you demanded half speed It will most likely be less than half load. Half throttle does not equal half load.
Same example, you are at 60 with half throttle. You increase throttle by thirty percent. Speed does not increase. This increases ve by more than thirty percent. It is possible to reach maximum load in this scenario.
Stop arguing with a figure on the internet and observe it. Set up your instruments and make notes. Draw your conclusion then. Run your findings past published findings.
Then kick yourself for being a fool.
>>14102532
People who have been driving for less than a year arguing with each other.
How fucking embarrassing.
>>14102600
You should be. Everyone should have pride in their work no matter the project.
Looks primo.
>>14102747
People on the internet arguing over what ten minutes on the internet reveals.
How fucking embarrassing
>>14102668
Just for laughs, I brought the ME up to 70rpm from 45. I demanded seventy percent load to do it (smoke pouring from the funnel) and it requires a bit under fifty percent load from twenty nine percent load to hold that rpm.
Scavenge space pressure stayed around . 17mpa. So we have an increase in both engine load and rpm with no increase in scavenege air space pressure. I then decreased demanded load and the ME fell to fifty rpm.
I then demanded 90 percent load as we have a trip stop on 100. Rpm rose to ninety, or full. Scavenge air space has risen to. 20mpa. I'm sure if I continued applying 90 percent load the turbochargers will raise scavenge air space pressure even further, and load will reach ninety five.
My word, who would have thought?
>>14102839
i don't know what any of this means, but will flooring it in overdrive kill my car
>>14102849
It may be hurting your transmission. Especially towing.
But any high load low rpm detonation or pinging that may occur should be trimmed by the ecu after detection by the knock sensors.
You should be okay, but there is always the possibility. What sort of car do you drive? If it is fuel injected then you should not have many if any issues.
Economy wise high load low rpm situations can by quite good as the effect of pumping loss is lowered by the throttle body being less of a restriction. In a petrol engine there is a very real and significant effect of the engine attempting to pump air against the resistance of a closed or partially closed throttle body.
Tldr go for it champ.
>>14101180
AMERICA FUCK YEAH
>>14101199
>doesn't know once you read a certain velocity the R is unlocked as a Racing gear
>>14101919
>you are a nothing, and it appears this is what your head is full of
R E K T
E
K
T
>>14104492
So that's why its a straight cut gear?
>>14101283
Holy shit this is the worst bullshit I've ever read
>>14101456
Mazda, kek.
>>14104549
I forgot to disclose that every car does not have this feature.
>>14102278
It holds a high speed, while 5th accelerates to a high speed. If you still dont understand them you should just stick to autotragics.
