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More timing or more compression?

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Old Dec 17, 2002 | 03:31 PM
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PaveTim's Avatar
PaveTim
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Joined: Jun 2001
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From: Hurlburt Field, Florida
Car: 1991 Z-28
Engine: 350 SBC
Transmission: Probuilt 700R-4
More timing or more compression?
I have a 350 with trick flow heads. I am gonna do a 383 and was wondering if it would be beneficial for me to go up to about 11 compression. It is fuel injected. would a jump from 10:1 to 11:1 make a big difference>
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Old Dec 17, 2002 | 07:15 PM
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F-BIRD'88's Avatar
F-BIRD'88
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Joined: Sep 2001
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From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
The biggest difference will be the price of the race gas you'll need.

Build for a finished compression ratio of about 10:5 for alumium heads and 92/93 octane.
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Old Dec 17, 2002 | 09:45 PM
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89gta383
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From: St. Augustine, FL
Car: 89 GTA
Engine: 383
Transmission: 4L80E
Axle/Gears: 12 bolt-3.73
You can run more than 11:1 on pump gas with the right cam.

What cam are you running?
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Old Dec 17, 2002 | 11:18 PM
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holmes677
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From: Loveland, Ohio
I figure with aluminum heads as well as the fact that it will be fuel injected will allow him to run 11:1 compression on 92/93 octane safely.
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