Give me a basic overview of diesel engines.
What are they good at and bad at
Can regular mechanics work on them or is it a specialty thing
>>14775183
My knowledge
>takes different fuel
>lots of low end torque, power comes at the very very high end of the rev range
>they're more fuel efficient of course
>use different compression ratios to achieve all that
End
>>14775199
I heard they last longer?
They don't have spark plugs
They crank harder but less often
If you rig the right kind of fuel feeding array you can run them on literally fucking cooking oil, vodka or animal tallow (if you don't mind ololol-tier smoke coming out of your exhaust)
If you get a twostroke diesel of any kind it will not only outlive you but also all of your children
>>14775297
What's a two stroke
>>14775398
The thing you do when you touch yourself at night
>>14775183
>Can regular mechanics work on them or is it a specialty thing
If you refer to automotive diesel engine then yes, they are as easy/hard as any other engine.
Generally anything related to the fuel system in the engine bay is more complicated and expensive (and sometimes harder to reach) than the gasoline counterpart, but since we have direct injected gasoline engines nowadays, the differences are reduced.
A diesel engine bay tends to be more crowded than a gasoline one, but it's not rocket surgery
>>14775295
Yes, they usually last longer because they rev slower and are generally tougher because of the way they work.
>>14776017
Diesel fuel is a far better lubricant than petrol.
Therefore, the engine is constantly lubricated and clean, so wear is almost nonexistent.
Just compare petrol used oil analysis to diesel and you'll understand
what temperature do glow plugs make a difference at?
>>14777238
Very cold temps, like sub-zero and below
Diesel master race thread?
>>14775183
Good.
Maintenance.
Bad.
Tuning.
Absolutely
Low temperature.
>>14780168
>diesel engines being bad for tuning
Most of them are, but not all
https://www.youtube.com/watch?v=6FYttMIdUmA
>>14780176
Almost all of them can be chipped for easy increase in hp. Ones that have mechanical pumps can be screwed for more fuel. Also nigger intercoolers have proven to be easy sources for more power.
As a big con I would mention EGRs and narrower power band. Diesels are good for long distance driving rather than urban traffic.
>>14780168
>Bad.
>Tuning.
Nigga you have no idea how easy it is to squeeze cheap power out of diesels.
Even the most basic chips that you connect to the fuel pressure sensor can give you a few extra hp, tweaking turbo pressure nets you even more.
The good thing about diesels is that they always work with excess oxygen so you don't have to be as anal with a/f ratios as you would do with gasoline engines.
More fuel = more power if you do it with moderation.
>>14777215
yes m8 this is what i tell people at work so they stop buying all my petrol.
>>14777215
Why don't diesel rotaries exist then?
>>14780613
Apex seals crap out on a gas engine, what do you think will happen under the extreme pressures of a diesel?
>I don't know, just my guess.
>>14776009
Rocket surgery I think you ment brain science
>>14780672
Brain rocketry
They have a much higher compression ratio that makes them develop more torque for a higher VE (40-45% compared to 30-35%) BUT for them to endure the strain of mini explosions instead of burning the gas they have to use very rough skirts and large rings that reduce their ME (I think 75-80% compared to 85-90% of gas engines, but there have been large advancements in this area lately) but they're still more efficient in total. They also usually have to use beefy iron blocks and heads because of this so they're pretty heavy.
Diesel is a slow burning fuel so they usually can't rev over 5k without not combusting all the fuel properly, this causes modified high-revving diesels, eg. VWs with a modified pump to provide more gas (to substitute not burning all of it) to blow smoke.
They're good for turboing since they operate on the basis of compression ignition, which you want to avoid in gas engines. Increasing intake pressure makes the mixture more likely to do that, which is called knock or detonation in gas engines.
In N/A form compared to a gas engine they make a bit more torque and a lot less power.
Many diesels have to use 2 or 3 turbos because they use very high pressures at stock levels (20-40psi for diesels compared to 8-20 for gassers), and turbos usually have a very small efficient area for that high pressure ratios and if you used one, it'd spool up late and lose power fast.
>>14780672
It's kinda like killing two stones with one bird.
>>14780701
you're retarded, please find another board and never post here again
>>14780613
Because diesel combusts when compressed. Gasoline ignites when a spark plug fires. A rotary engine wouldn't compress the diesel fuel enough to ignite it.
If you don't understand the basic workings of an engine, why are you on this board?
>>14781116
Because nobody on this board knows how engines work
>>14780176
>mfw every time the black smoke comes on
Jesus Christ dude, just give it less gas and let it lean burn real nice instead of rolling improvised coal
>>14780168
>>bad tuning
>300€ remap
>15% hp increase, at least
>25% torks increase, at least
>with literally no mods
>>14780613
Diesels are 100% about torque.
Wankers dont have shit for torque.
>>14775403
Kek'd
My cons:
1)Most modern diesel trucks and suvs are for first world diesel. They have little princess high pressure fuel pumps that fail from poor diesel. Relatively expensive to replace.
2)Requires a fuel warming system for colder climates. Might take up to an hour to warm the fuel up. Vehicle often doesnt even start with that when temperatures fall below -30 or lower. Kills batteries.
3)Often requires additives.
4)Relatively difficult and costly maintenance.
Petrol engines provide more than enough torque for most people, are cheaper upfront and have cheaper maintenace.
my diesel is a bitch in the cold
>>14781843
>2)Requires a fuel warming system for colder climates. Might take up to an hour to warm the fuel up. Vehicle often doesnt even start with that when temperatures fall below -30 or lower. Kills batteries.
U wot? That's what glow plugs are there for aren't they?
>>14781843
I have a common rail diesel and have been driving plenty of other modern diesels and I never had to wait more than a few seconds for the car to start (and that's because I'm usually overly paranoid about glow plugs and let them cycle a few times before starting), and we get to -20°C here sometimes, -10 being the norm and we don't even have the so-called winter diesel here.
Sounds like your car has a problem if you have to wait one hour
>>14781873
i think he's talking about gelled fuel in the super cold
>>14775398
Detroit Diesel used to make two stroke diesels, and pretty much every low speed marine diesel engine is two stroke.
>>14780613
Who said nobody did it? The big issue is that a diesel engine needs a high compression ratio, which means for a wankel that you have to add in more stage(s) building the pressure.
>>14781903
At that point Gasoline would freeze solid too so what's the big deal
>>14775183
>good
torque
fuel efficiency
>bad
BHP
handling
maintenence
>>14781919
probably talking about webasto.
>>14781889
>and we get to -20°C here sometimes, -10 being the norm
>-10C
>cold
>even -20C
>cold
-30C is significantly colder than -20C. If he meant -30F then that's even more cold.
![2029502164_4_56121_1445141921_1280_1280__25899.1446662648.380.380[1].png](https://i.imgur.com/bP9AUZT.png "2029502164_4_56121_1445141921_1280_1280__25899.1446662648.380.380[1].png")
12 valve cummins are the best
FIGHT ME
>>14782039
That's a funny way to spell 'Detroit'.
Have a 24v-71.
>>14781903
#2 diesel start to gel at -8°C. That's shorts weather.
There are arctic diesels that can withstand up to -40.
>>14782111
>-8°C. That's shorts weather
inuit detected
>>14781165
I mean those of us that wrench understand the basics.
>>14780961
I think you mean getting two birds stoned at once
>>14782277
420 blaze it
>>14782283
blaze it like two turnips in heat
>>14779878
>crew can
>short bed
Dropped
>>14775183
Tfw want a diesel but I've heard people talking if you rev it occasionally, you drastically shorten its life span. I don't really feel shifting every 2k rpm.
>>14781414
Your stupid posts amaze me every time.
>>14782424
they're chatting shit m8
>>14782145
IT'S NATIVE
NOT EVERY NATIVE IS AN INUIT
CHEK BRIBILEG
