New Heads, Don't Know Cam.

bigdavetalldave · Jul 20, 2013

I have a set of gt40p heads that need rockers, but I don't know what cam I have in my car. What ratio should I buy? Can't find a straight answer.

betke76 · Jul 20, 2013

should be safe with some 1.6's, only way to know for sure is to pull it out and check the markings or numbers on the cam itself

RangerJoe · Jul 20, 2013

Are the heads already on the car? Stock is 1.6, and thats what you will find most common in the aftermarket as well. You really need to know what cam you have so you can install appropriate springs and pressure. You should also check piston to valve clearance with new heads and your decided rocker. Really, 1.6's are a safe bet.

Joe

bigdavetalldave · Jul 20, 2013

RangerJoe said:
Are the heads already on the car? Stock is 1.6, and thats what you will find most common in the aftermarket as well. You really need to know what cam you have so you can install appropriate springs and pressure. You should also check piston to valve clearance with new heads and your decided rocker. Really, 1.6's are a safe bet.

Joe

No, heads aren't. I had to pull the motor because the oil pump broke, and the engine started knocking. I decided it'd be a good time to put them on. I'd really like to just use the same cam, but if its smarter to just buy a new one, I could just buy a new one. I'd just rather not spend more money than I can afford.

bigdavetalldave · Jul 20, 2013

I'd figure I'd probably just go with 1.6's.

bigdavetalldave · Jul 20, 2013

How about b303 cam, and gt40p heads? Will 1.7 cause any ptv issues? Will 1.6 be fine with this combination?

Mr. Rustypwnz · Jul 20, 2013

Nope your fine, you have alot of room with 1.7's and a b cam. You could still advance it +4.

stykthyn · Jul 20, 2013

I run a tfs1 and 1.7 rockers with no issue. you will be fine.

RangerJoe · Jul 20, 2013

If engine is out, pull the cam and see if there are any markings on the ends.

Joe

New Heads, Don't Know Cam.

bigdavetalldave

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betke76

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stykthyn

I want to measure mine. It doesn't look that tall.

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