what cams would you suggest for a turbo race car? up until now we have been using the standard NB cams in a ported head with 1mm oversized valves.

 

custom is about your only option... you looking for specs or what? Depends on build details/goals, etc.

 

please be more vague

 

what u need to know? its a fully built engine. gtx2867r should be around 400bhp... was just thinking if there would be much to be gained in a set of cams. what is everyone else running on high power race/track cars?

 

The only disussion I have ever seen on miata cams is the exintake swap. Searching here or m.net will tell you everything you need to know.

 

i can get the specs on mine and what's required to mod on the head.... ill get back to this thread

 

Most people are running stock cams because they don't show any signs of restriction for cars in the 350-400whp range.

And yes, you couldn't be more vague. Turbo race car? Give me a ******* break. Try out our TURBO search function at the top.

 

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...

 

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.

 

There are plenty of people who run cams, usually n/a though.

Do you have a VVT head?

Dann

 

no its not a vvt head

 

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

 

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 guess it would depend on the track. For some tracks you would want more midrange torque than peak hp, no?

 

Absolutely, It depends in the goals of the engine.

 

And the shop name would be?

 

Look up warren heath performance on facebook

Dann

 

Keegan Engineering also does custom cams. Nothing sitting on the shelf, that I'm aware of; but might be worth giving him a call as well.

 

Webb cams is doing mine. overall they have been very helpful and knowledgeable in helping me pick specs for my goals. I've also heard of Delta and heard good things.

 

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.