How high compression are you running on 92 octane gas?
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
10:1 on iron heads, ~.055" quench, polished head chambers, smoothed piston tops, 4000' altitude, will have 36* WOT timing. 227/234 hydraulic flat tappet cam, with 1.6 rockers. 8:1 dynamic CR IIRC. 91 octane so far.
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From: Calgary, AB, Canada
Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
I run 8:1
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From: Caldwell,ID
Car: 2005 BMW 545i
Engine: 4.4L N62B44
Transmission: 6spd auto
Axle/Gears: Rotating
I had a couple wankles, but what does it have to do with 3rd gens?
Last edited by rx7speed; May 17, 2006 at 04:19 PM.
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
The question should read "how much dynamic compression to you run on 92 octane?" I plan on running 8.50 dcr with a .035 quench, aluminum heads and 91 octane.
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From: Saskatoon, SK, Canada
Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
10.6-ish with cast iron heads, flat tops, and a 230/236 cam. Its around 8.5 DCR.
I use 91 in the motor.
I use 91 in the motor.
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From: MD
Car: '88 IROC-Z medium orange metallic
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27
I've got 10.5 in mine but with the new fuel standards I had to pull a few degrees of timing out from all the damn water in the gas and the slower burn rate of the alcohol. I run a 85/15% mix of pump 93 and VP red when I go to the track.
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From: Yellowknife, NWT, Canada
Car: 84 Z28
Engine: 357
Transmission: TH-350C
Axle/Gears: 3.43
My new engine will be around 9.5:1 and will be running 91.
355ci
416 heads, barely touched
Xe268 cam
Hopefully it doesnt go boom
355ci
416 heads, barely touched
Xe268 cam
Hopefully it doesnt go boom
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From: Charlestown, IN
Car: 1971 Camaro
Engine: 427
Transmission: TKO600
Axle/Gears: 3.73
Originally Posted by flrtin1
Around 12.1:1 effective on 93 octane.
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