Both propane and N2O work - but not allowed under the rules for me. Racing isn't like playing on the street! I have no clue on the impact of propane on engine durability but there certainly is a potential for engine stress with it.

And guys - is there an online vid of retarding the cam timing? I think I want to set the cam to a few degrees BTDC - am I on track here?

Dan

My experience with cam retarding is accidental. It was on a gas engine and the new timing belt was installed one tooth off. The engine ran great but it lost all it's low end and came on like crazy on the top end.

It was interesting because it was a response like a 2 stroke hitting the power band. It was literally a dog down low and crazy on the top end. It would have been fun on a sports or a race car but not on this family sedan. Not sure the combination of the diesel's inherent low end power and cam retarding would live happily together.

__________________
-Evan


Benz Fleet:
1968 UNIMOG 404.114
1998 E300
2008 E63


Non-Benz Fleet:
1992 Aerostar
1993 MR2
2000 F250

A lot of the guys have suggested it. Of course, you can go TOO FAR so I'm thinking maybe 2* BTDC or so, not a crazy change. I just wanted to be sure I was thinking in the right direction and Bill Grissom's post today helped cement that I DID have it right in my mind.

Dan

I see in another thread that you are retarding the cam. I am curious as to how that works out. The stock Prechambers do not flow good at high speed, and retarding the cam raises the power band, (so much as it is).

One way to find out lol...

'Zakly! This is a race truck so you try stuff and see what happens. Retarding the cam is dead simple to undo so it's a great experiment. Also advancing the IP timing.

Dan

Once you get a better IP then enlarge your PC's.

Thanks MTU. I have a spare engine from a Forum member that I'll pick some time in the not-too-distant future and I figured I'd take the PCs from that one and hog them out. Everything in steps......

Also, I need to get off my fanny and run a compression check on my current engine. It takes a lot of glowing to fire it up and I'm wondering if it's down on squeeze. I just need to get around to it.

Dan

LOL.... Well I guess those of us who have modded the PCs must have had our EGT Gage calibration drift at the same time we did the mod.. and the reduction in smoke with more fuel must be an optical issue of some kind.. Then there is the speedometer problem that also happend at the same time.. I use the same entrance ramp to get on the same expressway and before I could only get to 60 by the end of it... now 75 and even 80 are possible...( I also have a turned up pump) Perhaps then lengthened the ramp and I just did not notice lol...

Dan, I apologize for the verbal pollution Lance AKA Forced Induction and now DenverW123, (who has been ban from this site a couple of times directly and several times as he has tried to slip back in under a different name as he is doing now), has projected into your thread as well as the others he has objected to. I have a sent a message to the Mods to see if this can be handled quickly before he totally destroys the threads in this forum.

dan these engines can make a lot of power just depends on how far you want to go. OM616 is a great resource. Trust me on that. searching "never ending" in this forum might bring up some helpful information.

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1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car

If it's a terrible idea why did my egt's go down, power go up, the amount of smoke at all rpm's go down and the climb to higher revolutions become shorter? Your lack of experience in this area shows you know little to nothing about this Lance.

been thinking on water injection to keep temps cool.Wonder how H2O2 would work instead.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran