Track Results bolt on Z28

[zraffz]

Looking for advice on improving the times I saw.

94 Z28, full weight, shift kit, 4.56s, short tube headers, catback exhaust, no cat, moroso cai, crappy 275 40 (or 45) 17 tires.

Best run of the night was:
60'------- 2.091
330'------ 5.876
1/8------- 8.958
1/8 MPH - 79.91
1000'----- 11.605
1/4------- 13.847
1/4 MPH-- 100.08

Car consistently ran between 13.8-13.9 until it got dark out and than started seeing 14.0-14.2 passes. It spun off the line and the shift from 1st to 2nd. As it got a little colder/darker it spun a lot harder.

I understand the slower trap speeds cause of the gearing but should the trap speed still be a tad bit higher?

Rear shocks are beat, I plan on doing front & rear shocks while I'm at it. I'll be throwing on my Mickey Thompson drag radials. I feel like the 60' and 330' were pretty bad for such steep gears, think it's got a 13.4-13.3 in it with suspension/tires?


I got the car very cheap and as a bragging point I'm investing as little as possible into it. With shocks, tires and initial purchase I'd be in it for under $1,500 still. If I can cut a 13.4 or better I'll invest in a nitrous kit (already have a kit on my 350 vortec s10 so I can just snag the bottle warmer out of it). Looking to run a 12.5 or better on a 100 shot w/ shocks and tires. Would it be possible?

[3DFORMULA]

Too much gear. Drag radials should help the 60'. New rear shocks.


Don't spray it with that much gear.

[97firehawk]

there was a guy the other night with 4.11s and a A4 with a 100 shot with a 28 inch tall micky out back running 12.20@112 all night stock engine with bolt ons .

[Dangerous95lt1]

You will pick up more on spray with a higher gear.
The higher gear allows u to stay in the spray longer and pick up speed faster than a 4.10

[zraffz]

You will pick up more on spray with a higher gear.
The higher gear allows u to stay in the spray longer and pick up speed faster than a 4.10
Are you talking about a numerically higher gear? I'd expect a ridiculous amount of wheel spin with 4.56s and a 100 shot off the line and don't think the rear would appreciate it if I did get it to hook up. My trap speed seems a little low to me but then again I do have very low gears.


I'm kinda just experimenting with all of this. I have almost all my parts for a forged 357 with Trick Flow 185 heads, 236/244 cam and a built th400 but for bragging rights I want to see how fast I can get the car with stock heads/cam on as cheap of a budget as possible.

[Dangerous95lt1]

No im talking like a 3.23 gear

[zraffz]

Alright I thought so. Just used to people referring to a numerically higher gear as being "higher".
Anyway, I am stuck with the 4.56s. I bought the car with them in it. It's fun for local roads and spinning the tires but that's about it.

[shadowbandit]

Well best time I got with my stock a4 with intake and Catback I ran a 14.0 at 103. All I know is a, A4 with a 2500-2800 stall, long tubes shift kit, and 3.73s will run bottom 13.2s all night cause that's what my car was for a while

[Jeff400w]

Go with the tallest tires you can. I'm running MT 275/60/15's 28in tall with 4.11's. I could go with 4.30's but that's about it.
Are you staying out of the water box at night?
Your trap speed isn't that far off for high 13's

[lt1nova]

With 3.25s & 235/60r15s I was running 2.0x 60's, 13.5 at 100, turned on the nitrous and that went to 12.6@110. I don't think your numbers are mismatched.
I got some 4.11's & 29" tires now and have yet to get back to the strip.

[zraffz]

I'm not very familiar with racing. Didn't give tire height any thought.
It would make sense my times suffer because I hit over drive in the 1/4 while a numerically lower geared car wouldn't hit over drive at all. At least on motor, a taller tire might prevent me from hitting over drive or give me a bit more speed through the traps?

Would I see any improvement on motor with taller tires if traction conditions (worse case scenario) stayed the same?

[Jeff400w]

Until you cure the traction issue it will be hard to see any improvement. If you have some drag radials give them a try.
Start at around 18 lbs of air and go down a little if you have to. I wouldn't go below 15 lbs. Stay out of the water box.
Dry burnout if you can.