People always ask me how fast my car is, or how much horse power it has. (BTW: I have an 85 GT with a 5 speed isuzu tranmission). I am never able to properly answer any of these questions because everywhere I look there is a different HP rating or 0-60 time. I have seen the 0-60 to be as low as 6.9 and as high as 8.32 and the horse power ranging from 110 to 160. Does anyone know the actual factory specs of any of the years/models of fieros?
I am mainly looking for: Top Speed Horse Power 0-60 0-100 1/4 mile times
My guess is different test procedures or measurements at different RPM points to more readily cerify emissions compliance cause the different ratings, not differences in actual engine output.
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10:46 PM
saleenfiero Member
Posts: 451 From: Medicine Hat, Alberta, CANADA Registered: Sep 2000
Originally posted by saleenfiero: Sooooo theoretically, given a perfect driver on a perfect day, and 86 se 4 spd is the fastest fiero you could buy? (stock)
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11:15 PM
Oreif Member
Posts: 16460 From: Schaumburg, IL Registered: Jan 2000
I am mainly looking for: Top Speed Horse Power 0-60 0-100 1/4 mile times
The below are a compilation of magazine reviews and spec put out by Pontiac. Top speed with a 4-spd V-6 is 123mph Top Speed with Getrag 5-spd and V-6 128mph Horsepower is 140 for 85/86 V-6's the 87/88 the rating was taken at a lower RPM for emission standards so it read 135. Torque is 170 and 165 respectively for the same reason. Physically the only difference in the V-6's is on the 88's the crankshaft is internally balanced like the later 3.1L. An 85 GT with V-6 4-spd was tested by Road and Track to be 0-60 in 7.1 seconds and 1/4 mile at 15.4 seconds. An 88 Formula with a Getrag 5-spd and V-6 was 7.2 seconds 0-60 and 15.6 1/4 mile. The 2 vehicles were tested by the same magazine. Car and Driver had an 88 Formula that hit 6.9 0-60 and 15.2 in the 1/4 mile. The automatic trans cars were roughly 1 to 1.5 seconds slower. With you using the Isuzu trans I am not sure how much of a gearing difference there is or how it compares to the Getrag trans. I know that the 84 4-spd had a 4:11 gearing and mated to the V-6 (in a particular car) reached 0-60 in 6.4 seconds and 1/4 mile in 14.8 seconds. This particular car may have had other mods that I don't know about. But was run at Great Lakes Dragway a few years back. The guy who owned it says all he did was swap the trans.
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11:24 PM
Jun 22nd, 2001
FieroKyle Member
Posts: 1141 From: lowell, michigan, USA Registered: Jun 2001
FieroPerformance, I had the same problem. One time I read specs that my car could do 0-60 5.4 secs which I was gullible and excited to believe till I ran my car and timed it. I was very dissapointed with the results. lol. Thanks Orief because I have been searching for that same info. Later
0-60 and 1/4 mile times depend on abuse factor. car-condission and driver skill. pluss that was then and this is now cars arn't new or gm's perfect mag's testers even when they were new. trick tires and 6000rpm launch ain't real anyway if you want to keep it runing long.
Thanks Oreif but after this engine fiasco, that's still not done and is NOT going to be done in time for the show this weekend i'm not going to be doing anything big to the car until winter. I am kicking the 4:10 tranny idea around though and I think I might just do that instead of moding my auto like I had planned to.
------------------ Dave Gunsul N.I.F.E. member 86 GT modified 85 SE daily driver
