Bench racing guess.

[LoveSpeed1]

My current 99 Z with a Lid and catback used to churn 13.2's @ 108 w/ a 2.1 60' on 245/55?/16's about 20k miles ago. She is going into the shop mid to late December to get 4.10's, 315/35/17 radials in back, a short throw, and longtubes, high flo cats, and either a lm or borla catback.

I was thinking with these mods i could run 12.60s @ 112ish. My old 60' times were around 2.1. What 60' times could i be looking at now on streetable radials?

Also i will be running in 40°f weather on a decently heated track up in seattle, wa.

[35th-ANV-SS]

I would say that your car as it was before was capable of hitting 12's. Stock rubber is capable of a 1.9X 60' time, so right there would put you at a 12.8s car as-is.

With enough practice I would say your car would be capable of around a mid to low 12s vehicle with the additional modifications being added.

What RPM are you leaving at? What RPM do you shift at?

While the 4.10's will help with acceleration off the line, it is also going to hurt your traction as well. So, with that said, it may or may not be a wash with getting a better 60' time. I would say you should be able to get down into the 1.8X though at least.

Do you have any suspension modification?

What DA is the track you run at? This could be having an affect as well.

[pajeff02]

With UMI rear suspension, similar exhaust, 3.73's and Hoosier QTP's, our A4 equipped car went 12.8's. Being essentially stock power, it is the first 60' that make or break your runs.

[LoveSpeed1]

I usually left around 2300rpm feathering. I spun here and there but i felt like i wasnt leaving nearly as hard as i could. I was shifting around 5800-6000. I felt like i made up the time with the powershifting. I always ps every gear when at the track.

I dont know if there were any suspension mods done by the previous owner but he didnt tell me about any mods. The track i ran the times at was atlanta dragway in ga.

Those are good 60' times. I cant wait to see what i get next time with some more practice and better tires.

[2002ssslp]

After the mods you should leave at around 3000 rpm ( still have the old 10 bolt rear ? ) I would expect 1.85 60' times and 12.4's @ 110 as it runs through the traps. JMHO

[SuperSSguy]

^ The cool weather in Wa. should help a little as opposed to the Ga. heat and humidity...thats very little though. IMO it sounds like you need to tighten up your suspension SFC`s LCA`s etc...some drag radials wouldnt hurt either.

[35th-ANV-SS]

You are shifting early. Try shifting around 6100-6200.

[LoveSpeed1]

If i could run 12.4's i would be more than happy with that. I am on the stock rear still. Ill try shifting at 6000-6200 next runs and try to get that 60' down. Just gotta practice.