Best way to choke a 408 N/A..... unported GMPP L92 Intake FTL!
05-26-2008, 06:15 PM
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Thought id put in my $.02. Dyno numbers on a friend's M6 ZO6, L92/l76 intake on 408 were 540/495. port matched gmpp intake and edelbrock elbow, 480/422. Same cam, nothing else changed, SD tune. Tried a less aggressive 90deg sheet metal elbow that sat about 2.5" taller overall and gained very little RWHP. I agree wtih Ls wizard, i think its in the elbow and how the air flows to the cyllinders. regardless of its design, its not as good as the l76. checking the plugs, the fronts are darker, rears are leaner. I dont think its a very good combo at all with NA/nitrous apps UNLESS, you go with an accufab or something similar. Not going to try that since vettes rely on the fly-by-wire for many things.
l76 going back on and waiting on teh FAST intake. any word on those?
l76 going back on and waiting on teh FAST intake. any word on those?
