9krevvin

Hey guys, I have been searching and found many discussions about this, but I have not found a definite answer. Is it best to use an AP1 intake cam with an AP2 exhaust cam? Has anyone actually done it? I will be running a custom built tubular sidewinder manifold with a 6262. Will this work well with my setup?

DFWs2k

It didnt seem to matter much with my sidewinder, may have moved power band down a couple hundred rpms.

If I could go back, I wouldnt have changed it.

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03supers2k

I have an Ap2 motor with the ap1 exhaust cam or intake cam which ever it is, and on the dyno I didnt make any power when going past 8000rpm so instead off going to 9000rpm I just kept it at 8500rpm


As you can see the engine stops making power at like 7800rpm so there is no point in going to 9000rpm.

9krevvin

Anybody with an F20 done this? Did y'all dyno before and after?

DFWs2k

I have f20, have before and after dyno, but had more changes besides just that.

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9krevvin

What changes did you make? What were your numbers?

SLINKYDOG

there is just a few horse power differance, heck i even have tried the off set key ways, and they didn't do much at all. so uless you are max out is a certian race class i don't think it is worth the cost or effort

DFWs2k

I agree.

Changes were built head, 70mm tb, slightly better/larger dp. Would have to ask tuner for dynos, but not any huge changes in numbers, ie, less than 5whp at peak.

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Soul Coughing

I did this back when i had a log manifold and I found no real changes. I did find i lost a couple MPG when i had the AP1 intake cam on compared to straight AP2 cams on my AP2 motor.