can you run diesel in a 98 400f?

[yz400fsmasher]

sum dude told me that because it is a high compression engine it was possible but i called him a dumb ass because as far as i know about diesel is it has to be injected at tdc. any info?

[Johnny_On_The_Spot]

sum dude told me that because it is a high compression engine it was possible but i called him a dumb ass because as far as i know about diesel is it has to be injected at tdc. any info?

? NO

[grayracer513]

You cannot run diesel in any gasoline engine for several reasons, not the least of which is that diesel has an octane number of about 40-45, and the detonation would be spectacular, if it ignited. And that is the second major problem; poor ignitability on exposure to a spark. Then, there is the issue of a complete lack of ignition timing control, since the fuel is apt to self ignite from compression or heat. In diesel engines, this is handled by injecting the fuel at the time ignition is desired, but a gasoline engine has no such mechanisms in place.

In the Marine Corps, this kind of info is categorized officially as Bovine Scatology, or as the guys in the field simply say, BS.

[yz400fsmasher]

what if there were some mods done to the engine like an injector pump and injector.

[grayracer513]

You mean, what if you converted it to a diesel?

What do you think?

[oldmanx]

What do you think?

What I think is, Bovine Scatology has now become a part of my vocabulary. This will probably be spread to the vocabulary of my co-workers.

Thanks, Grey!!

[Clb33fyxj]

diesel engines run much higher compression than these bikes have, and that combined with very fine atomization is what allows for ignition without spark plugs. modern common rail engines are around 17:1 since they have injection pressure which are much higher than traditional fuel pumps, while the upper region of the scale would be around 25:1. the cylinder, head and pistons could not contain the pressure during combustion.

[Clb33fyxj]

also injection usually takes place just before tdc to allow the flame front maximum burn time, producing a cleaner burn and maximum torque

[grayracer513]

diesel engines run much higher compression than these bikes have, and that combined with very fine atomization is what allows for ignition without spark plugs. modern common rail engines are around 17:1 since they have injection pressure which are much higher than traditional fuel pumps, while the upper region of the scale would be around 25:1. the cylinder, head and pistons could not contain the pressure during combustion.

You don't really believe that the internal peak combustion pressures in a gas or diesel engine are anywhere near as low as the peak compression pressures, do you? Compression has nothing to do with the stress put on an engine run as a diesel. Diesel burns so much faster that peak combustion pressures are generally higher for a given power output (which generally occurs at about 30-40% of the RPM the same power is reached in a gas engine).

also injection usually takes place just before tdc to allow the flame front maximum burn time, producing a cleaner burn and maximum torque

All gas and diesel engines fire in advance of TDC while at speed. The difference is that diesels do not advance the ignition event as far as Gas engines do, and in fact, often fire after TDC at idle.

[Wiz636]

You mean, what if you converted it to a diesel?

What do you think?

As soon as I read the question I could immediately visualize the response. ?

[grayracer513]

As soon as I read the question I could immediately visualize the response.?

Some days it's tougher than others. ?

[RENNER]

sum dude told me that because it is a high compression engine it was possible but i called him a dumb ass because as far as i know about diesel is it has to be injected at tdc. any info?

wut kind of redneck hillbilly told you that? he prob mixes diesel with his cheerios

[tnl]

Bovine Scatology, or as the guys in the field simply say, BS.

Sniglets* Words that don't appear in the dictionary, but should ?

[cowboyona426]

All I can say is.. wow.

[DrThumper]

Make a gas engine run on diesel...?...Hahahahahahaha!!!!!!

Theres so many differences, I don't know where to start!

Gas compression ratios are like 9:1 to 12:1, diesel is something like 30:1.

Diesels have no spark plugs, no ignition, totally different valve timing. Etc, etc.

Tell the (doofus redneck) guy to do it to his own bike first...

[grayracer513]

Gas compression ratios are like 9:1 to 12:1, diesel is something like 30:1.

Typical diesel compression ratios run from around 15:1 up to about 20-22:1. It's extremely rare that they go higher than that.

Where will it end? ?

[jayh300]

Typical diesel compression ratios run from around 15:1 up to about 20-22:1. It's extremely rare that they go higher than that.

Where will it end? ?

when you smack the lock on it.....

[grayracer513]

when you smack the lock on it.....

Coming soon. This has about outlived the limited usefulness that it started out with. Entertaining in a bizarrely twisted way, though.

[jayh300]

Coming soon. This has about outlived the limited usefulness that it started out with. Entertaining in a bizarrely twisted way, though.

true... it has had me dreaming of a 1 cyl duramax style injector nozzle/pump assy that could be run off the timing chain and an exhaust particulate filter/silencer that could produce 450 degrees of exhaust to roast you buddies number plates off......

sorry.... back to regular schedule programming

[Wiz636]

So, just for the sake of knowing...at what temperature will diesel ignite, and what's the minimum compression ratio would it take to get the air that hot? Let's assume seal level and 70 degrees F.