How much boost on 91 octane
#1
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Joined: Jun 2020
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My engines are rebuilt 525efi with rods, pistons, stock compression, Cometic gaskets with studs, Teague stage 3 camshafts with whipples and MOAC intercoolers. I am running at 6000ft elevation and have pullied to 7psi but I am looking to add some more boost and am only seeing 5400rpm. Whipple has told me to just pulley it down to get 11-12psi, just looking for some opinions.
#3
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Joined: Dec 2016
Posts: 582
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From: Portland OR
I'm pushing about 800HP with a 3.3 whipple and cometic gaskets, aluminum heads, stock compression. I run 92 octane and 9psi at 5,500rpm. I have looked inside and don't see any evidence of detonation so far. I'm at sea level. I'm not going to push it any further though. Hope that helps.






