I've been driving truck and wrenching them for 30+ years...no way is diesel faster burning. It's almost like trying to ignite motor oil. Like erizo says..run a little gas into a diesel engine and watch the fireworks.... run diesel into a gas engine and watch it try to fire and halfassed run while everythings knocking like crazy. I'm not much help on the SVS issue , other than I got mine fixed and only run 87 octane now. But someone is telling you wrong on the diesel fuel.

erizo wrote:

try a little experiment.

pour a couple of drops 95 octaine on the floor (outside in a safe place) and light it, then try the same with a couple of drops of diesel.

diesel engines run on average for new engines, 17-1 compression ratios. if you squirted even 100 octaine into a combustion chamber with that compression, the results would be catastrophic (but fun to watch )

i cant help but think that mebbe the exec has possibly been sniffing his own butaine Post edited by: erizo, at: 2007/08/06 10:47[/quote]
But, try and run that diesel in a "metered" amount through a high pressure fuel injector and then light it!
-The gasoline goes "woof" and will burn for a second or two
-The atomized diesel will go "boom" and will be burned instantly.
There's more energy in diesel, so it's flame speed is higher.
Diesel fuel is rated in "Cetane" numbers for quality of burn.

If you run gasoline in a finely "metered" amount through the diesel fuel injector, the diesel engine will run on the gasoline just fine with actually a softer knock because it's flame-speed is slower, but the engine will be GUTLESS, due to the low energy content of the gasoline. (but we can't run gas in diesel engines because it will not lubricate the diesel injection system)
I have seen diesel engines running on straight natural gas or propane, and they purr like a kitten with no clattering (because NG and LPG have a
slower flame-speed.(High octane rating) And they don't pound as hard on the piston like diesel.
Propane and Natural gas can run compression ratios way higher than gasoline. This is because these gasses have a higher ignition temp. and
a slower flame-speed than gasoline.
When you have some time, do some research on "flame speed." I have some books around here from school somewhere.
On the big boilers we used to work with, you run NG at a lower manifold pressure with larger orifices. And propane at a higher manifold pressure with smaller orifices.
This is mainly because: Propane has more energy and a higher flame speed. (Lower octane than NG.)
NG has less energy and a slower flame-speed than propane, (Higher octane rating.)
Butane (component of premium gasoline and old heavy bulk propane, that gives propane the "punch,&quot burns slower than regular gasoline, but faster than today's lighter propane. Propane is lighter today (less BTU's) than it used to be, because they are stripping more butane out of it due to the high price butane is worth. They put most of that butane in premium gasoline these days.
Well, I have to go to work now.
Debate with you later on this topic... Have a great day everyone!

StarMyram wrote:


If you run gasoline in a finely "metered" amount through the diesel fuel injector, the diesel engine will run on the gasoline just fine with actually a softer knock because it's flame-speed is slower, but the engine will be GUTLESS, due to the low energy content of the gasoline. ![/quote]

sorry mate, but your diesel engine would be knocking more than a sailor at the door of a whorehouse after 6 months at sea.

think about it for a second.

the diesel engine in my car has a compression ratio of 17-1 because the ignition is by compression, not from spark, because it is a less volatile fuel. drop a cigarette into a bucket of diesel and it will go out, try the same with a bucket of petrol and you can forget about haircuts for a while.

for that reason, the rate of burn would be faster due to better atomisation (it´s a lighter fuel) and lower evaporation temp, as opposed to diesel which is heavier and requires higher pressures in the injector system to atomise it properly

run 95 octaine through the injectors directly into a combustion chamber that has a 17-1 compression and the pre-ignition would be horrendous, not to mention the extra vibration due to the harmonics being out of synch. and that would be if it lasted more than a minute. it would be gutless due to terminal pinking.

honestly mate, why do you think that up until just recently, when audi feilded a diesel car at the lemans 24 hour (where constant speed is more important than anything else), all racing engines run on petrol?

quite simply, you get more bang per gallon from petrol<br><br>Post edited by: erizo, at: 2007/08/07 09:37

oh, and you&acute;d never get petrol to run through a modern diesel injector system, as the pressure is FAR too high (especially in common rail systems) compared to petrol injection systems.

pressurise petrol to diesel injector pressures, and it&acute;d go BANG big time.

yes, folks have put petrol in diesel tanks without detonating the system totally (although it doesnt do the system much good) but you must remember it is then a diesel/petrol mix

We talking Diesels now? We had a customer once that owned 2 identical VW rabbits but one was diesel , one gas. Long story short, we drained the gas tank once on the gas model as it was dieseled up at a fueling station and would not run, and we REPLACED the diesel engine when one of them filled it with gas and it blew a hole in the cylinder wall. My experience with putting gas in a diesel engine.BB

Frankie_G wrote:
Guys my 01 Road Star is stock other than AIS removed and HardKrome 3&quot; pipes and jetting for the pipes. What might be the next step to increase horsepower other than cylinder boring or major mods ?

See it's a diesel debate on the other end of the thread . . Anywho. Get a more open airkit or do the poormans BAK on the stock air box with a K&amp;N filter. A 2 into 1 pipe will give you better grunt. You need to port the manifold or get a Nemesis to make these mods worth while. If you still need more get a smaller front pulley. You will notice a seat of the pants improvement

Frankie~ Everything that Musky said will work great and keep the cost down for you. If you still gon't get the seat of your pants pull that your looking for after this, go with the HSR42 Mikuni carb. If that don't do it, give it up and get an R1!! Good luck.

Do what erizo said the ignition module from a 1700 really helps just ask slowpoke I gave him mine. I have a 3000 and man did they help my bike (1700). Also the baffles in your HK arn't giving you much back pressure to give you the low end omph. I changed and modified my baffles four time before I got it right and they are a far cry from stock now. As for the gas thing you could run acatone in 87 octaine to give it a kick. It makes the gas atomize better for bertter burning. I have done it a few times. Me I just run regular as I don't want burned valves.

Ummm...ok....soooo....I should change my 1602 over to a diesel and run 87 octane or 93 octane or jet fuel, and rub the top of my head while hopping on my left foot ?!?!?!?!?!

Thanks for all the input fellas. There is lots of good ideas in this thread. I'll update you guys as I experiment. I'm gonna keep the HK pipes. I love the sound.

Maybe I should just buy a Hyabusa !

Frankie_G wrote:
Ummm...ok....soooo....I should change my 1602 over to a diesel and run 87 octane or 93 octane or jet fuel, and rub the top of my head while hopping on my left foot ?!?!?!?!?!

Thanks for all the input fellas. There is lots of good ideas in this thread. I'll update you guys as I experiment. I'm gonna keep the HK pipes. I love the sound.

Maybe I should just buy a Hyabusa !

Aaaarrrgh, ....I give up!!!
I am going to have a talk with a fence post outside....!


Swapping the diesel into yer bike sounds like alot of work... What about gettin' one of them new DIESEL motorcycles they are fiddling with in Europe now?
(A DIESEL motorcycle sounds kinda stupid, but they are going to use them in areas of the world where gasoline is hard to get, and diesel fuel is readily available.)
Acceleration will be painfully slow (but lotsa low-end torque!), starting it will be a pain in the arse when your battery is weak and your glow-plug relay quits, ....and just imagine the warranty claims and complaints for knocking in the engines!!