05-24-2003, 10:16 AM
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Senior Club Cobra Member
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Join Date: Nov 2001
Location: Kountze,
TX
Cobra Make, Engine: CMC, 351 Cleveland, Dual Quads, C6
Posts: 1,377
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Not Ranked
I wish I had a scanner, but anyway here are my dyno results. I didn't rev engine over 6000rpm.
Run1 maxhp 244@5100 drops to 200@5400 back to 244@5900
Run3 maxhp 254@5100 drops to 213@5400 back to 254@5900
Run6 maxhp 257@5100 drops to 221@5400 back to 256@5900
Air/Fuel ratio has the same drop at 5100rpm. It richens up from 12.5 to 11.8 and back to 12.5 by 5700.
Started all runs at 3000rpm. Run1&2 is as I drive it normally. Run3#4 was with one sidepipe baffle removed from each side. Run5&6 was with baffles removed and small air cleaners removed.
Looks like to me when it goes rich, power drops like a rock. Maybe the rich ratio comes when the secondaries of both Holleys opens? I am sure I should have replaced the MSD chip and ran it up well past 6000, but I was trying to get a feel for this. Unfortunately, the dyno operator was only an operator and knows nothing about tuning. Between runs, I let the water temp cool to 170 so they would all start the same and tried to do everything exactly alike.
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David Shelton
Lone Star Gashole!
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