Cam suggestion (patrick G, Predator Help please)
Well, you're missing the point. Typically a CNC'd head has had some work done in the bowl. So before milling, it usually is a greater volume than originally. So instead of volume of combustion chamber, tell how much was milled off the head.
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From: AUSTIN TX
Originally Posted by hammertime
the more you mill to raise the compression, the less PTV clearance you will have, which I think is what he's been trying to say.
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From: IN A VAN, DOWN BY THE RIVER!
oh ok. now i see where everyones coming from, i thought yall were saying i was gonna get cnc heads but these are stock 317's that im gonna get milled. what about the fm12 on a 112? could this fit, maybe with a little less milling?
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From: BFE
These are not the heads you wanna use. They are ~71 cc and every .005 flat mill is a 1cc decrease. Just to get to stock 66cc, you would have to mill .025 which is acceptable but starts limiting your cam options on PTV.
If you insist on using those heads, I would mill them .040 and use a high lift LSK low duration cam with a tight LSA.
Still though, I think you should sell these to someone wanting FI application and get 243 castings.
If you insist on using those heads, I would mill them .040 and use a high lift LSK low duration cam with a tight LSA.
Still though, I think you should sell these to someone wanting FI application and get 243 castings.
Originally Posted by PREDATOR-Z
These are not the heads you wanna use. I think you should sell these to someone wanting FI application and get 243 castings.
That is your best bet!
Originally Posted by JPH
awesome results prostock. i wish alot more people would try using crane stuff around here, i think it makes just as much power, if not more, but there profiles usually deliver alot stronger/flater/broader trq. curve than other competiors from what i see.
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From: IN A VAN, DOWN BY THE RIVER!
would it be worth it to save and get some stage 1 243 or just get some stock ones? cause im on a really tight budget, thus being the reason i got the 317's in the first place.
