Intake valves...2.00, 2.02, 2.04? Stock LS1 w/ big cam
#24
TECH Senior Member
iTrader: (27)
Port velocity, port volume, chamber design, valve job, valve size, exhaust port efficiency (way overlooked in my opinion) etc. all play part in what makes a head great or a turd. If one of those aforementioned is not optimized for the "combination", then results will suffer. AI has proved you don't need oversized intake valves to make great power.
#27
Teching In
Join Date: Jul 2014
Location: Oklahoma City
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I have the PRC Stage 2.5 5.3 heads and a custom Comp Cam .588/232 intake .600/238 exhaust. Stock LS1 bottom end 1.75 headers, LS6 intake. ORY single exhaust. Ran 11.96 @ 115 at 1100ft above sea level in a car that weighs 3875lbs with my fat self in the seat.
There are better combo's. But for the money the PRC heads are hard to beat.
There are better combo's. But for the money the PRC heads are hard to beat.