Need timing map for Accel Gen 7 w/ supercharged 350
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Joined: Feb 2004
Posts: 735
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From: San Diego, CA
Car: 89 GTA
Engine: 6.0L Procharged
Transmission: T-56
Axle/Gears: 4.10
Need timing map for Accel Gen 7 w/ supercharged 350
I'm looking for a street conservative timing map to use with my Accel Gen 7 setup. I'm not looking to squeeze maximum HP out of this car, just a conservative base timing map to avoid detonation on pump gas. I'm running 8lbs of boost with 9:1 compression. You could email me your cal file to dave2brecht@yahoo.com as well 
I have a wideband conroller and am running about 12:1 at full throttle/boost. I could probably also fatten this up slightly to 11.5:1?
I have a wideband conroller and am running about 12:1 at full throttle/boost. I could probably also fatten this up slightly to 11.5:1?
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: Need timing map for Accel Gen 7 w/ supercharged 350
Just throw in something like 32-34 deg at wot, 100 kpa map before boost ever comes in. Set it to come in around peak torque rpm maybe just before.
Idle depending on cam, run around 20-28 deg or so. Ramp up to 35-38 cruise over 2000 rpm and low maps under 80 kpa.
Boost tables take 1 deg out for each psi boost, so 8 psi you should be atleast 26 deg if 34 at wot 100 kpa. Or go alittle more conservative, 1.1-1.3 deg per psi.
11.5-12.0 air fuel should be ok. Aluminum heads for sure. Iron may want less timing and richer to keep cool but you will have to experiment
Idle depending on cam, run around 20-28 deg or so. Ramp up to 35-38 cruise over 2000 rpm and low maps under 80 kpa.
Boost tables take 1 deg out for each psi boost, so 8 psi you should be atleast 26 deg if 34 at wot 100 kpa. Or go alittle more conservative, 1.1-1.3 deg per psi.
11.5-12.0 air fuel should be ok. Aluminum heads for sure. Iron may want less timing and richer to keep cool but you will have to experiment
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