A
Anonymous
Guest
Good plan. Got a source for the shim? Maybe a website?xzerokidx":2oq9y10g said:
xzerokidx
Well-known member
The way that I know of is to buy two (2) MLS headgaskets (Multi Layer Steel). Take the small rivets out of them both and add the inner two layers from one headgasket to the other, replace the headgasket and there you have your lower compression.....viola
Still 20#'s of boost may be too much without forged pistons, but theres only one way to find out.
Still 20#'s of boost may be too much without forged pistons, but theres only one way to find out.
My experience with turbos is practically nil, having only run them on industrial diesel engines, but there is one thing that I do believe I understand and that is the fact that kinetic energy increases proportionaly to an increase in mass, but increases by the SQUARE of velocity. The point being if you double the effective PRESSURE, you double the load on the piston, but if you double the velocity (rpm) then you have QUADRUPLED the load on the piston. If you hope to improve performance with boost, at least keep the rpm down as rpm is known to be much more detrimental than boost. Remember, doubling the cylinder pressure at any given rpm gives roughly twice the torque, and twice the torque at the same rpm is also twice the horsepower. Granted, you maybe can't double the actual numbers but I used that to illustrate a point. Lower compression, modest rpm and lots of boost just might work. Let us know what happens.
Joe
Joe
A
Anonymous
Guest
Sweet, Thanks man.xzerokidx":lwhpjoa6 said:
Dam right!!
Lazy JW, I dont plan to spin it much higher than the factory intended, if any. I dont think I will have to as I plan to use the stock head and cam
Yeah, I might have thumbed through that book a 'couple' times...Fingers":lwhpjoa6 said:
A
Anonymous
Guest
Just my 2 cents. I'm currently runing 20 lbs. of boost on a stock V6 with a draw-thru (yes, cast pistons & NO IC ) set up & have been for about 3 yrs. now without anything breaking or blowing, so with carefull tuning anything is possible. The I6's have SEVEN main bearings. I would think they should be quite tough.
) set up & have been for about 3 yrs. now without anything breaking or blowing, so with carefull tuning anything is possible. The I6's have SEVEN main bearings. I would think they should be quite tough.How did I miss this thread??? Must have been on Thankgiving weekend!
It's true that Kelly's Falcon is mainly a drag car. However we've driven it all over the place and it does very well on the street. Doesn't overheat, idles like a stocker etc. The only difference is that we have to manually shift the automatic, and we can beat damn near anything that pulls up next to us!!!
We've run her car up to 16lbs. of boost. (by accident
) and I've never felt that the car was going to grenade. It's all in the tune up! If you run the thing lean or if it goes lean by itself due to some failure of a part then yes, you'll probably hole a piston. That can be done at 6lbs. of boost.
I bet Kelly's stock US 250 motor will easily hold up to 20+ lbs. of boost. As the learning curve progresses, her crew chief (me) will slowly start to crank up the wastegate!
Will
It's true that Kelly's Falcon is mainly a drag car. However we've driven it all over the place and it does very well on the street. Doesn't overheat, idles like a stocker etc. The only difference is that we have to manually shift the automatic, and we can beat damn near anything that pulls up next to us!!!
We've run her car up to 16lbs. of boost. (by accident
) and I've never felt that the car was going to grenade. It's all in the tune up! If you run the thing lean or if it goes lean by itself due to some failure of a part then yes, you'll probably hole a piston. That can be done at 6lbs. of boost.I bet Kelly's stock US 250 motor will easily hold up to 20+ lbs. of boost. As the learning curve progresses, her crew chief (me) will slowly start to crank up the wastegate!
Will
A
Anonymous
Guest
Amen. Well that pretty much sums it up!! Thanks again Does10sDoes10s":2kmcc255 said:How did I miss this thread??? Must have been on Thankgiving weekend!
It's true that Kelly's Falcon is mainly a drag car. However we've driven it all over the place and it does very well on the street. Doesn't overheat, idles like a stocker etc. The only difference is that we have to manually shift the automatic, and we can beat damn near anything that pulls up next to us!!!
We've run her car up to 16lbs. of boost. (by accident
I bet Kelly's stock US 250 motor will easily hold up to 20+ lbs. of boost. As the learning curve progresses, her crew chief (me) will slowly start to crank up the wastegate!
Will
I think with cast pistons 15 PSI would be max and on the edge (IE if the wind changes direction it will go) but with some good forged pistons arp hardware and a good fuel system and IC I think 20 would be very easy to handle. if you run it on a dyno program it gives some scary numbers back to you
