stock 317's or prc 317's?
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Finishing up the planning of my engine build. going to be a 6.0l block, callies internals, diamond pistons, gt91 turbo, etc etc etc but when it comes to the heads, should I just stick with the stock 317's or should I spend the cash on a nice set of cnc machined prc 317's? Im looking to make around 850-900RWHP
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i jsut went through this with my build. after alot of shopping around it was worth the extra $$ the get a set of nice new heads with no miles on them and a nice cnc port job on top of that.
i went with the prc 2.5 317s to get the better ss valves.
i went with the prc 2.5 317s to get the better ss valves.
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Yah thats the exact set I have been looking at. The AFR's 3/4" deck thickness is very tempting. But so is going with the prc 317's and saving $1500-$2000 and putting that money into a 9" rear end or nice brakes.
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A GT91 will make more power than a stock head deck will handle w/o orings or similar.
TF 220's as cast, if running roller rockers, or Dart 225's with a valve job and bowl clean up for the cheapest thick deck.
If your that short on cash, the stock or GMPP cnc LS3 heads would be a better deal than cnc'd stocks catherdral heads.
Or keep surfing the classifieds on here.
$3000k plus is a lot for a set of AFR's - from experience.... out of the box 230's ~$2600+ spring upgrade will get you in the 8's with a 91mm.
TF 220's as cast, if running roller rockers, or Dart 225's with a valve job and bowl clean up for the cheapest thick deck.
If your that short on cash, the stock or GMPP cnc LS3 heads would be a better deal than cnc'd stocks catherdral heads.
Or keep surfing the classifieds on here.
$3000k plus is a lot for a set of AFR's - from experience.... out of the box 230's ~$2600+ spring upgrade will get you in the 8's with a 91mm.
Last edited by TurboS10; 03-19-2012 at 01:55 PM.