How much lift you can run without having to modify the pistons
Titan907
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I'm curious how much lift you can run without having to modify the pistons. What intake style works best? Single plane, dual plane, air gap?
How much lift you can run without having to modify the pistons
- Thread starter Titan907
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LongHorn
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Re: bolt on power
I could be beneficial to know what engine your running, as they are not all the same.
I could be beneficial to know what engine your running, as they are not all the same.
LongHorn
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Re: bolt on power
I'm running forged flat top pistons with 71' hi-compression heads & a .500 lift cam. It has a Edlebrock dual plane air gap intake. On a V8 a dual plane is better for low end torque. A single plane tends to be a street racer type of thing.
I'm running forged flat top pistons with 71' hi-compression heads & a .500 lift cam. It has a Edlebrock dual plane air gap intake. On a V8 a dual plane is better for low end torque. A single plane tends to be a street racer type of thing.
LongHorn
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Re: bolt on power
With a stock AMC V8 you are wasting your time with a lot of cam.
you need to stay under 4500 rpm or you'll regret it.
The factory oiling system is not up to high rpm use.
There is a list of oiling modifications that need to be done for high rpm use.
In my images there are some pictures of my motor that show a oil line running through the lifter valley. If you look close you'll see extra oil return holes drill in the valley it's self. There is another thread with some pictures. I'll have to go through my other hard drive & try to find them. You could try the search feature too.
With a stock AMC V8 you are wasting your time with a lot of cam.
you need to stay under 4500 rpm or you'll regret it.
The factory oiling system is not up to high rpm use.
There is a list of oiling modifications that need to be done for high rpm use.
In my images there are some pictures of my motor that show a oil line running through the lifter valley. If you look close you'll see extra oil return holes drill in the valley it's self. There is another thread with some pictures. I'll have to go through my other hard drive & try to find them. You could try the search feature too.
LongHorn
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Re: bolt on power
Don't take that wrong, one trip up to 4500 rpm isn't going to blow your motor, but if you do it much you motor will start to lose oil pressure. And how much do you know about your motors history?
Don't take that wrong, one trip up to 4500 rpm isn't going to blow your motor, but if you do it much you motor will start to lose oil pressure. And how much do you know about your motors history?
LongHorn
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Re: bolt on power
Hey Titan, try this link: http://www.jeep-cj.com/forums/f2/304-performance-help-suggestions-2556/index2.html
Hey Titan, try this link: http://www.jeep-cj.com/forums/f2/304-performance-help-suggestions-2556/index2.html
Titan907
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Re: bolt on power
I know nothing about it. I just picked up the project. I'm up for modifying the oil system, etc. I'm going to be going through it from top to bottom anyhow. I don't want to be a thread thief, but I sure do appreciate the info.
I've had a few jeeps in the past, and the stock AMC 304 had plenty of power for the lightweight CJ5 , I'm just looking for a little more HP on this one...I don't care about fuel mileage, or emissions. This isn't going to be a daily driver...
I know nothing about it. I just picked up the project. I'm up for modifying the oil system, etc. I'm going to be going through it from top to bottom anyhow. I don't want to be a thread thief, but I sure do appreciate the info.
I've had a few jeeps in the past, and the stock AMC 304 had plenty of power for the lightweight CJ5 , I'm just looking for a little more HP on this one...I don't care about fuel mileage, or emissions. This isn't going to be a daily driver...
CJ
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Re: bolt on power
Lets start a new thread on this - I'll move the posts and get it done...
LongHorn
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CJ
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Re: bolt on power
This a loaded question...
Lift is not a good gauge for your engine efficiency...
A CJ really needs low RPM torque and HP, for this, lift really doesn't come into question (duration - yes - get the fuel to the engine). Heck, I would be worried about valve spring binding before piston contact using most aftermarket cams.
During my sand drag days, I did much work on checking valve to piston spacing (playdo or clay is your friend here). My CJ saw 7000+ in 100 yards, not typical for normal everyday CJ's...
As for what intake works best, what are your intentions? For normal off-road, a dual plane is the best, when I raced - the Torquer II that I had was what worked...
We need some more info to help you.
This a loaded question...
Lift is not a good gauge for your engine efficiency...
A CJ really needs low RPM torque and HP, for this, lift really doesn't come into question (duration - yes - get the fuel to the engine). Heck, I would be worried about valve spring binding before piston contact using most aftermarket cams.
During my sand drag days, I did much work on checking valve to piston spacing (playdo or clay is your friend here). My CJ saw 7000+ in 100 yards, not typical for normal everyday CJ's...
As for what intake works best, what are your intentions? For normal off-road, a dual plane is the best, when I raced - the Torquer II that I had was what worked...
We need some more info to help you.
Titan907
Jeeper
Moderate off road use. No drag racing. Mostly for cruising with the top down. I'd like to get some sound out of it, and be able to hit some fire roads, etc. Any help is greatly appreciated.
CoreyYoungCj577
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Re: bolt on power
Sorry just had to comment on CJ's sand draging days, I saw a 5 the other day set up for sand drags and i CRAPPED it was a 383 chrysler engine twin turbo'ed with all the toys and bells and it looks amazing i wanted it
This a loaded question...
Lift is not a good gauge for your engine efficiency...
A CJ really needs low RPM torque and HP, for this, lift really doesn't come into question (duration - yes - get the fuel to the engine). Heck, I would be worried about valve spring binding before piston contact using most aftermarket cams.
During my sand drag days, I did much work on checking valve to piston spacing (playdo or clay is your friend here). My CJ saw 7000+ in 100 yards, not typical for normal everyday CJ's...
As for what intake works best, what are your intentions? For normal off-road, a dual plane is the best, when I raced - the Torquer II that I had was what worked...
We need some more info to help you.
Sorry just had to comment on CJ's sand draging days, I saw a 5 the other day set up for sand drags and i CRAPPED it was a 383 chrysler engine twin turbo'ed with all the toys and bells and it looks amazing i wanted it
CJ
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Re: bolt on power
I'm old... LOL - My dragging days were in the early 1980's...
Sorry just had to comment on CJ's sand draging days, I saw a 5 the other day set up for sand drags and i CRAPPED it was a 383 chrysler engine twin turbo'ed with all the toys and bells and it looks amazing i wanted it
I'm old... LOL - My dragging days were in the early 1980's...
Titan907
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Re: bolt on power
Who doesn't want a twin turbo 383?:dunno: Maybe not in my CJ5 , but...Sorry just had to comment on CJ's sand draging days, I saw a 5 the other day set up for sand drags and i CRAPPED it was a 383 chrysler engine twin turbo'ed with all the toys and bells and it looks amazing i wanted it
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I guess I am not drinking enough, what does lift have to do with piston size?
It seems to make sence to everybody else.
It seems to make sence to everybody else.
IOPort51
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skyjacker 2.5 lift?nitro shocks,31" BFG A/T off road.8000 lb Warn winch, original owner.=^)
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Titan907
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...as he picked up the hammer and saw...I see, said the blind man.