What kind of gas milage are 383 tpi guys getting?
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From: Dallas, TX area
Car: 91 Formula WS6 (Black, T-Tops)
Engine: 383 MiniRam (529 HP, 519 TQ - DD2K)
Transmission: Built '97 T56, Pro 5.0, CF-DF
Axle/Gears: 4.11 posi Ford 9"
I'm getting around 13.5 - 14.5 with "spirited" driving around town and around 21 or so running the A/C on the highway around 70MPH.....
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Joined: Feb 2000
Posts: 7,015
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From: Schererville , IN
Car: 91 GTA, 91 Formula, 89 TTA
Engine: all 225+ RWHP
Transmission: all OD
Axle/Gears: Always the good ones
Dont have a real good town number so I woulg guess about 15-18mpg.
the highway is another matter, its break in run to bowling green KY from NW IN it averaged over 20 on the way down.
I tuned and tuned while I was there and averaged 21.45 on the way home with loaded car and windows down doing 70+ the entire way home.
This is on pure tuning alone and still have other things to play with like highway mode and the like :-)
Its a vortec headed TPI 383 w/ 8.67-1 compression and a 216/221 w/ .500 lift cam. Gears are 3:23 and converter is a vigi 2600stall lockup.
later
Jeremy
the highway is another matter, its break in run to bowling green KY from NW IN it averaged over 20 on the way down.
I tuned and tuned while I was there and averaged 21.45 on the way home with loaded car and windows down doing 70+ the entire way home.
This is on pure tuning alone and still have other things to play with like highway mode and the like :-)
Its a vortec headed TPI 383 w/ 8.67-1 compression and a 216/221 w/ .500 lift cam. Gears are 3:23 and converter is a vigi 2600stall lockup.
later
Jeremy
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Joined: Jan 2005
Posts: 26
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From: Indiana
Car: 2 1990 IROC-Z Camaros, 2000 WS6 TransAm RAM-AIR, Honda Civic & Cougar (daily drivers)
Engine: supercharged 383 TPI, 5.7 TPI, 5.7 LS1, 1.6, & supercharged 3.8
Transmission: 5 autos
Our supercharged 383 TPI gets right around 15-17 with the AC on and driving it normal
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