56 RWHP Gain On Induction Changes
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56 RWHP Gain On Induction Changes On my HK Racing 408 I had a LS6 intake manifold, Shaner Stg 2 OEM TB, descreened OEM Maf with Whisper ends, and a Whisper lid. I then bought a Fast 90 intake and spent about 6 hours porting and port matching it to my Absolute Speed 240cc 5.3L heads. A NW TB, Lingenfelter 100mm MAF, and Fast Toys lid were installed. Mike Norris did the tune, which I think needs to be dialed in a little more since my AFR from 6,000rpm+ is like 12.0/1. Mike's dyno which is conservative showed 524/501. I was delighted since this was through a 9", with heavy Dennys Nitrous steel DS, and Jet Hot 1 3/4 headers.
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I tried to have my wife post the chart, since I'm not computer literate, from Photobucket, but it didn't work. Eventually, I'll get it up. The amazing thing was that I picked up 45/50rwhp under the curve from 4,000rpm up.
I am amazed you are getting that kind of power out of ported 5.3L heads.
I've been considering a similar setup, but was concerned my current heads wouldn't be up to the challenge. After seeing this, I may go ahead and give it a shot.
I've been considering a similar setup, but was concerned my current heads wouldn't be up to the challenge. After seeing this, I may go ahead and give it a shot.
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This thread was moved over to the Dyno section which is where I should have started it in the first place. The graph is also posted up.
I put on my old AS 5.3 heads with Ferrea valves, which were hogged out to like 240cc, because I was out of $$$ for this project. Obviously there are a lot better heads that will make more power out there, but I'm pleased with where I ended up.
I put on my old AS 5.3 heads with Ferrea valves, which were hogged out to like 240cc, because I was out of $$$ for this project. Obviously there are a lot better heads that will make more power out there, but I'm pleased with where I ended up.
