warwickbass

Just curious.

chamealeondroptopZ

depending on what gears you have 2.73 or 3.23's good times are anywhere from 14.1-13.8 @ around 100mph

warwickbass

Good question. I don't even know what my gearing is. How could I find out?

Don't Look Back

Quickest way is to check the RPO codes in the glove box. That'll tell you the ratio, as long as they haven't been changed. Look for the following codes:

GU2: 2.73
GU4: 3.06 (V6 Cars)
GU5: 3.23
GU6: 3.42 (M6 Cars)

If the gears were changed, try doing 70 MPH in 3rd gear (1:1 ratio) and look at the tach, the RPM's will tell you the gears. If all else fails, put the car up on a lift, or at least get the back wheels off the ground, and with the car in neutral, mark the driveshaft and wheel, then count how many times the driveshaft rotates per revolution of the wheel.

warwickbass

I see GU5. So, what times could I expect. I assume the automatic transmission is 4LE60? Or whatever.

warwickbass

It has Positraction too, btw.

JoeliusZ28

posi or limited slip?

all Z's have ltd. slip fyi.

warwickbass

I'm pretty sure Positraction. How could I verify?

Don't Look Back

They're the same thing.

RPO code for limited slip is G80.

warwickbass

Oops, ok. Where can I find the RPO code information?

Don't Look Back

http://camarossworld.com/Production%20Numbers/RPO.asp

They're on this site too, in the miscellaneous section, but I couldn't open the file, so this is the easiest.

warwickbass

So, back to my original question. About what 1/4 times could I expect?

Don't Look Back

With no mods, traction, perfect run, etc. look for high 13's. Don't think it could be any better than 13.8. But, there's always the possibility it can be.

warwickbass

Whoa..I thought 14.1 would've sounded about right. I'm eventually gonna put Hooker Catback Exhaust along with a K&N Filter system. I'm guessing I'll have around 315 horses at the crank?

jsz28

with my 95 and an auto i ran 14.02 all day. Thats just with a hooker cat back exhaust and nothing else done to the car.