Question. Aftermarket cam stock motor.
03-14-2009, 03:03 PM
#1
TECH Enthusiast
Thread Starter
Question. Aftermarket cam stock motor. Has anyone done this? I wanted to get a cam that made a sweet sound (flop flop flop flop) but something where i dont have to change alot or any other parts.
03-14-2009, 03:20 PM
#2
Plan to change valvesprings.
It happens everyday. Camshaft preferences differ greatly from person to person. Id stick with a simple 224 cam and call it a day.
The bigger the cam, the more lopey it is, but also makes it require many more supporting parts.
It happens everyday. Camshaft preferences differ greatly from person to person. Id stick with a simple 224 cam and call it a day.
The bigger the cam, the more lopey it is, but also makes it require many more supporting parts.
03-15-2009, 04:59 AM
#5
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If you are planning to keep it close to stock and avoid a lot of issues,
You don't have to go to what is effectively a mid-level race cam to get a different sounding idle.
Fitting a 220+ cam in a stock LS1 will mean more than just springs.
You'd need pushrods at a minimum also.
Then a pretty good tune from someone to get it to run acceptably.
Once all that's done you will lose economy.
You could achieve what you want with a much smaller cam, by simply finding or ordering one ground on a tighter LSA.
It depends on you being honest with yourself and realising what you want.
If it's just better (tougher) sound and a good power increase from idle through to 6,000rpm then read-on.
This way, you avoid the negative sides of a big increase in duration which will shift your operating rpm up higher than you might like and also avoid the loss of power below 3,500rpm or so that would happen compared to a smaller well chosen cam.
If you don't believe it read this article where a crate LS2 was run with just a 204/218 ZO6 cam re-ground on a 112LSA and compare the power it made (especially the average power) on the last page compared to a 226/226 which had 1.85 roller rockers helping it.
The test was run by Katech:-
http://www.hotrod.com/techarticles/1...ild/index.html
Staying close to stock e.g. going for something like a 212/218 on a nice close 112LSA to get a lumpier idle, would mean that the car could run quite happily on the stock tune*** without any need to worry about losing any drive-ability.
***The PCM will learn & adapt to the new parameters better than you think.
It would need a full PCM re-set and you going through a proper idle re-learn procedure first.
You don't have to go to what is effectively a mid-level race cam to get a different sounding idle.
Fitting a 220+ cam in a stock LS1 will mean more than just springs.
You'd need pushrods at a minimum also.
Then a pretty good tune from someone to get it to run acceptably.
Once all that's done you will lose economy.
You could achieve what you want with a much smaller cam, by simply finding or ordering one ground on a tighter LSA.
It depends on you being honest with yourself and realising what you want.
If it's just better (tougher) sound and a good power increase from idle through to 6,000rpm then read-on.
This way, you avoid the negative sides of a big increase in duration which will shift your operating rpm up higher than you might like and also avoid the loss of power below 3,500rpm or so that would happen compared to a smaller well chosen cam.
If you don't believe it read this article where a crate LS2 was run with just a 204/218 ZO6 cam re-ground on a 112LSA and compare the power it made (especially the average power) on the last page compared to a 226/226 which had 1.85 roller rockers helping it.
The test was run by Katech:-
http://www.hotrod.com/techarticles/1...ild/index.html
Staying close to stock e.g. going for something like a 212/218 on a nice close 112LSA to get a lumpier idle, would mean that the car could run quite happily on the stock tune*** without any need to worry about losing any drive-ability.
***The PCM will learn & adapt to the new parameters better than you think.
It would need a full PCM re-set and you going through a proper idle re-learn procedure first.
03-15-2009, 06:50 AM
#6
TECH Enthusiast
Thread Starter
If you are planning to keep it close to stock and avoid a lot of issues,
You don't have to go to what is effectively a mid-level race cam to get a different sounding idle.
Fitting a 220+ cam in a stock LS1 will mean more than just springs.
You'd need pushrods at a minimum also.
Then a pretty good tune from someone to get it to run acceptably.
Once all that's done you will lose economy.
You could achieve what you want with a much smaller cam, by simply finding or ordering one ground on a tighter LSA.
It depends on you being honest with yourself and realising what you want.
If it's just better (tougher) sound and a good power increase from idle through to 6,000rpm then read-on.
This way, you avoid the negative sides of a big increase in duration which will shift your operating rpm up higher than you might like and also avoid the loss of power below 3,500rpm or so that would happen compared to a smaller well chosen cam.
If you don't believe it read this article where a crate LS2 was run with just a 204/218 ZO6 cam re-ground on a 112LSA and compare the power it made (especially the average power) on the last page compared to a 226/226 which had 1.85 roller rockers helping it.
The test was run by Katech:-
http://www.hotrod.com/techarticles/1...ild/index.html
Staying close to stock e.g. going for something like a 212/218 on a nice close 112LSA to get a lumpier idle, would mean that the car could run quite happily on the stock tune*** without any need to worry about losing any drive-ability.
***The PCM will learn & adapt to the new parameters better than you think.
It would need a full PCM re-set and you going through a proper idle re-learn procedure first.
You don't have to go to what is effectively a mid-level race cam to get a different sounding idle.
Fitting a 220+ cam in a stock LS1 will mean more than just springs.
You'd need pushrods at a minimum also.
Then a pretty good tune from someone to get it to run acceptably.
Once all that's done you will lose economy.
You could achieve what you want with a much smaller cam, by simply finding or ordering one ground on a tighter LSA.
It depends on you being honest with yourself and realising what you want.
If it's just better (tougher) sound and a good power increase from idle through to 6,000rpm then read-on.
This way, you avoid the negative sides of a big increase in duration which will shift your operating rpm up higher than you might like and also avoid the loss of power below 3,500rpm or so that would happen compared to a smaller well chosen cam.
If you don't believe it read this article where a crate LS2 was run with just a 204/218 ZO6 cam re-ground on a 112LSA and compare the power it made (especially the average power) on the last page compared to a 226/226 which had 1.85 roller rockers helping it.
The test was run by Katech:-
http://www.hotrod.com/techarticles/1...ild/index.html
Staying close to stock e.g. going for something like a 212/218 on a nice close 112LSA to get a lumpier idle, would mean that the car could run quite happily on the stock tune*** without any need to worry about losing any drive-ability.
***The PCM will learn & adapt to the new parameters better than you think.
It would need a full PCM re-set and you going through a proper idle re-learn procedure first.
Great stuff thanks I basically want the bigger lope at idle. Thanks for the Input
