Anyone here boosting on Prc STG2.5 5.3L ?
08-17-2011, 06:15 PM
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Anyone here boosting on Prc STG2.5 5.3L ? I have an 02 SS with a stock bottom that im currently dd. Soon i'll no longer need to dd it and was hoping to take it off the road and start looking for a shortblock to boost on this winter. I'm trying to work the total cost out, so im curious if i can re-use my prc heads and use dished pistons to help lower my comp. ratio....So any one boosting on em?
08-18-2011, 09:04 AM
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Should be as good as any other stock casting head. Since you already have them, I would reuse them and you could always upgrade to an aftermarket casting/thick deck head later on. Obviously it will lower your compression some with the bigger chamber, so maybe run a piston that nets you a little higher now so it drops to where you want later. BTw, what is the chamber size on those heads, because I know my stg 3 tea 5.3's were a 64cc head after the work they did on them which puts it right around the same as most of the aftermarket casting heads.
08-21-2011, 04:36 PM
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Should be as good as any other stock casting head. Since you already have them, I would reuse them and you could always upgrade to an aftermarket casting/thick deck head later on. Obviously it will lower your compression some with the bigger chamber, so maybe run a piston that nets you a little higher now so it drops to where you want later. BTw, what is the chamber size on those heads, because I know my stg 3 tea 5.3's were a 64cc head after the work they did on them which puts it right around the same as most of the aftermarket casting heads.
08-21-2011, 07:31 PM
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I am in no way an expert on the texhnical side of yhis question however, I am running these heads in my DD ls2. I was instructed to run a cam with a larger intake duration which would help with the higher compresion. I have a roots type blower and used comp blower cam 239/243 .624 lift 114 lsa. It's a little rough as drivabilty goes but is making great power. Mine was at 10.2 compression. Keep in mind roots blowers respond better to a little higher compresion.
12-15-2011, 03:24 AM
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Bump for more info. I was going to ask this same exact question. Glad I searched. Would I be able to just use a thicker head gasket? Also which HG would be best and where do I get it from?
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12-15-2011, 11:28 PM
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I have a set of 317 heads laying around but my prc heads are ported and have all the upgrades that a boost head would need.
