Mpg?
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Mpg?
hope im in the right spot, but what are the MPG specs for the Fbodies in their various options from 87-92
looking to get a new job that'll be a commute, and my DD truck is too nice to add so many miles. but at the same time, i cant bring myself to buy some pos econobox that'll run 18s in the 1/4 w/ mods and ride my patience to the bone.
looking to get a new job that'll be a commute, and my DD truck is too nice to add so many miles. but at the same time, i cant bring myself to buy some pos econobox that'll run 18s in the 1/4 w/ mods and ride my patience to the bone.
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
I get 23 mpg hwy with my moded 87 Formula, 305 TPI. I gained about 5 Mpg just by converting to TPI. I run Flat 15 sec right now in the 1/4 but I ahve not tuned the ECM.
I think TRAXION gets 30 mpg and turns 12's in a NA 350
John
I think TRAXION gets 30 mpg and turns 12's in a NA 350
John
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Joined: Jul 1999
Posts: 304
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From: Woodlands, MB, Canada
Car: 1990 GTA
Engine: 5.7
Transmission: 4L60
Axle/Gears: 3.27 Posi
I've never seen a list of the MPG's 3rd gens get.. The EPA rating was listed for all the cars (on the window sticker) when they were delivered, but nobody seemst to have gathered the info..
FWIW, my 5.7L 1990 GTA is stock (except for a catback exhaust).. I've always got about 25 mpg on the highway and around 18mpg in the city.. It runs mid to high 14's in the quarter..
FWIW, my 5.7L 1990 GTA is stock (except for a catback exhaust).. I've always got about 25 mpg on the highway and around 18mpg in the city.. It runs mid to high 14's in the quarter..
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From: North Central Indiana
Car: 86 IROC
Engine: 383
Transmission: TKO 600
Axle/Gears: 3.54 Dana 44 IRS
with the 305 engine in the sig and my automatic i got 24 hwy and 19 city.
now for some reason with my new 5 speed i only get 23 hwy and 18 city. the car went high 13s with limited traction last summer. New times coming soon with the net Tremec!
now for some reason with my new 5 speed i only get 23 hwy and 18 city. the car went high 13s with limited traction last summer. New times coming soon with the net Tremec!
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Joined: Mar 2001
Posts: 14,293
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From: Doghouse ······································ Car: 1989 Formula 350 Vert Engine: 350 L98 Transmission: 700R4 Axle/Gears: B&W 3.27
Car: 87 Formula T-Top, 87 Formula HT
Engine: 5.1L TPI, 5.0L TPI
Transmission: 700R4, M5
Axle/Gears: Sag 3.73, B&W 3.45
This is from an "Official" 1989 release from Pontiac. released Sept 1988.
EPA FUEL ECONOMY, MPG: CITY / HWY
5.7-liter 16 / 25
5.0-liter TPI manual 16 / 26
5.0-liter TPI automatic 16 / 23
5.0-liter TBI manual 16 / 25
5.0-liter TBI automatic 16 / 24
3.8-liter turbo TBD / TBD
2.8-liter manual 19 / 27
2.8-liter automatic 17 / 27
John
EPA FUEL ECONOMY, MPG: CITY / HWY
5.7-liter 16 / 25
5.0-liter TPI manual 16 / 26
5.0-liter TPI automatic 16 / 23
5.0-liter TBI manual 16 / 25
5.0-liter TBI automatic 16 / 24
3.8-liter turbo TBD / TBD
2.8-liter manual 19 / 27
2.8-liter automatic 17 / 27
John
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From: IL
Car: 91RS_92Z28
Engine: 5.0_5.7
Transmission: WCT5_WCT5
Axle/Gears: 3.08_3.42
My 305 TBI (high flow cat and exhaust with msd wires) 31 mpg is the record. That was achieved by not taking it out of 5th gear for over 350 miles though. Mixed driving still gets around 20 mpg.
Find me another car with the mileage, handling, torque, and ttops and I'll then maybe I put the RS away.
Find me another car with the mileage, handling, torque, and ttops and I'll then maybe I put the RS away.
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