Pro

Just curious how close they might come.
Motor trend says the SS does 0-60 in like 7 seconds, and 1/4 15.40 @ 91.40mph. How does a 3rd gen compare?

Stock for stock, that is.

Because assuming the LT1 is more powerful, but the Impala would weigh much more, then they should be about even?

CODY BEHNKE

If both were stock the Z28 will make the Impala look real bad.

A nice 1990+ 350 will run low to mid 14's all day long.

90rocz

I agree, I've seen moderately modified SS's just run mid-low 14's. Like mild converter, mild gears, programmer, the usual stuff. But remember these things are really heavy.
I ran an SS one in my '91 regal 3800 and I could stay with him to only 40mph, then he walked me HARD!...They're not the hardest launchers but after they get rolling they can turn it on...

doug791

stock for stock theres no contest. Yeah some subtle mods will wake up the impala but the same mods done to the Z would put it the high 13's.

Bob T

I can add this, if it will help....
My LT1 Caprice, when stock, ran a best of 15.18 on a warm, high 70s day......
The only performance difference between a Caprice and an Impala is:
Rear gears Imp 3.08, Cap 2.93
Tire size Imp 27", Cap 28"
Also, Imp has an elec primary fan, Cap mine has a mech. Worth about 10hp.
Most stock Impalas I know, and our club races a lot, run around 15 sec, some a little under, some a little over....

I don't know the stock specs on a 3rd gen Camaro....but I would think it should be faster...somewhere in the 14s....

BTW....It's easy to get an LT1 b-body to run 13s NA...

Later,
Bob T.

Marc 85Z28

It's a 15HP difference, but the Z28 will more than make up for it in the torque dept. Besides, the Impala is nearly 600-700 lbs heavier, with poorer gearing.

Bob T

Just curious, what are the stock numbers for a '92 Z28....???

I know the LT1 in the Impalas are factory rated at 260 FWHP, 330 FWTQ and weighed 4000-4400 depending on options.

Thanks,
Bob T.

doug791

http://www.thirdgen.org/newdesign/tech/techdb.shtml factory specs for all of the third gen f-bod's

RobsWS6

Really? The Impala doesn't have a chance solely on weight. I'm sure if you laid dyno graphs of both engines, you'd see the LT1(even the iron headed one) would look better than the peaky torque of the L98.

If you were to swap engines, the F-Body would more than likely be faster because of the torque curve, let alone the little higher HP.

Peak numbers don't tell the whole story!

As for the question, the F-Body would walk the Impy all day, stock for stock.

90rocz

1992 Z28:
5.7L/ 350 TPI, 245hp@4400, 345lbft@only 3200, 4.00"boreX3.480" stroke, **9.8:1**compression, 18psi oil pressure@2000...
0-60 5.8
1/4 = 14.4@97
60-0 = 132ft
slalam = 63mph
16mpg city
skidpad = .90