what cams for turbo race car?
12-07-2012, 06:24 PM
#8
I'm actually very surprised with the lack of cam options for the B6/BP line of engines considering the amount of Miatas that are raced, etc.
I understand it's mostly due to the fact that the heads on these engines (apparently) flow like ****, but I recall someone mentioning that the design wasn't too far off from some Honda engines other than there being significantly less lift available.
Do we really have any hard data to suggest that bigger cams won't help? I mean, there are virtually no cams available, and I don't think anyone has the money or has ever actually compared how the ones that ARE available act in a stock head.
I could be wrong...
I understand it's mostly due to the fact that the heads on these engines (apparently) flow like ****, but I recall someone mentioning that the design wasn't too far off from some Honda engines other than there being significantly less lift available.
Do we really have any hard data to suggest that bigger cams won't help? I mean, there are virtually no cams available, and I don't think anyone has the money or has ever actually compared how the ones that ARE available act in a stock head.
I could be wrong...
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12-07-2012, 06:44 PM
#9
Tried searching and could not find a thread just about cams. If i am wrong feel free to show me where it is.
As has been said there is very little off the shelf and even if there was it may not be suitable for a race car spending most of its time higher in the rev range.
The reason there isn't much off the shelf must be 1 of 2 things. Either there is no point as the existing cams are up to the job, or not enough testing has been done to see what works well.
As has been said there is very little off the shelf and even if there was it may not be suitable for a race car spending most of its time higher in the rev range.
The reason there isn't much off the shelf must be 1 of 2 things. Either there is no point as the existing cams are up to the job, or not enough testing has been done to see what works well.
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12-07-2012, 07:46 PM
#12
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Then there are plenty of cams available, I know a guy with an engine building shop who specializes in BP heads and have dozens of grind available.
Granted he is in Australia but his prices are very good too.
Dann
Granted he is in Australia but his prices are very good too.
Dann
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12-07-2012, 08:56 PM
#13
im running integral cams, they are out of business not, and were bought by another company, if you search you will find them, they do motorcycle stuff. they may make the cams for you though as the bought integrals grinds.
i am running
R3 intake .495 lift 292 duration
R1 exaust .455 lift 282 duration
i think those are the specs. i dont have the paper right in front of me. for the people who say cams dont make any difference are talking out there *** from no experience. I have talked to someone with a nearly identical engine setup,and turbo set up and i made 30 more horse and like 5psi less. and the main difference was that they had no cams.
i run a GT3071R and made 418 whp on a dynopack, at 18psi at 8000rpm. this is a race car and i idle the car at 1500 rpm. i had to mill clearence into the head so they could have room to spin, and convert to shim under bucket
i am running
R3 intake .495 lift 292 duration
R1 exaust .455 lift 282 duration
i think those are the specs. i dont have the paper right in front of me. for the people who say cams dont make any difference are talking out there *** from no experience. I have talked to someone with a nearly identical engine setup,and turbo set up and i made 30 more horse and like 5psi less. and the main difference was that they had no cams.
i run a GT3071R and made 418 whp on a dynopack, at 18psi at 8000rpm. this is a race car and i idle the car at 1500 rpm. i had to mill clearence into the head so they could have room to spin, and convert to shim under bucket
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12-08-2012, 02:50 PM
#20
I am currently running a Webb Cam. I also thought they were good to work with.
Is your motor buillt to handle the extra rpm? How much port work have you done? Any flow testing? What about gearing? Brake booster?
The answers to those questions will help you determine how radical you should go.
Is your motor buillt to handle the extra rpm? How much port work have you done? Any flow testing? What about gearing? Brake booster?
The answers to those questions will help you determine how radical you should go.
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