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Does anyone have dyno results or back to back drag runs after changing runners?

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Old 04-12-2001, 12:47 AM
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Car: 91 GTA, 91 Formula, 89 TTA
Engine: all 225+ RWHP
Transmission: all OD
Axle/Gears: Always the good ones
Does anyone have dyno results or back to back drag runs after changing runners?

Just ordered my SLP runners for 200 with everythign on special.... and yes i know there not ASandM siamesed but they have enuff meat there to do some serious port work on them........was just wondering who has gotten what type of results on there cars with runner only changes and the matching of the runners to the plenum , etc
my car is stock internally with a catback, MSD, cold air etc
later
jeremy

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1991 Formula 350
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Old 04-12-2001, 05:35 PM
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RCR
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Car: '84 Fiero ('01 GA interior)
Engine: '96 4.0 Aurora
Transmission: '96 4T80E
Running a basic plenum porting on the first run, I dynoed at 247rwhp @ 4800RPM with stock runners. My second time out, with a highly ported plenum and totally siamesed runners, I dynoed at 248rwhp. Doesn't sound like much, but the peak was at 5500RPM. I also found a loose vacuume line when I got home. Both runs were on diffent dynos (first a Dynojet, second was a Mustang)and I was running very rich at top end. Oh, stock intake for both. Next time out will be with ported intake and LT4 Hot cam.

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