streetracingta

I just got back from Atlanta International Dragway. Its my first outing in the car. My mods are 3.73 rear gear, yank 3600ss converter and a fresh set of mt et streets 255/50/16 on the rear.

R/T ... .111
60' ... 1.790
330 ... 5.364
1/8 ... 8.395
MPH ... 80.30
1000 ... 11.041

1/4 ... 13.270
MPH ... 101.20

The car seems to get out of the hole good. I just doesn't have anything on the big end. The trans is untuned but does it make that big of a difference. Im just wondering why my mph is low and what I may be able to do to help it out on the big end. Any help or explanation will be greatly appreciated.

RPM WS6

iTrader: (3)

Was there wheel spin on that run? Your 60-foot should be much better with those mods, as well as your ET and trap speed. ET shoud be deep into the 12s, and I would expect 60-foot to be at least 1.6 or better with those mods and tires. Decent traction should be attainable with the ET Streets.

So the slow ET might be due to traction if there was wheel spin. As for the trap speed, how are your shift points? With the gear and converter swap, and no tuning, the trans might be shifting too early and/or need some tuning adjustment to Torque Management (TM). Of couse, there is also a host of other (basic) maintenance related items that might need to be addressed to restore lost power (plugs/wires/filters/MAF cleaning/O2 sensors/etc.) It's also possibile that there might be some amount of trans slip depending on its condition.

streetracingta

Thanks, im glad I wasn't alone on the disappointing results. I was thinking I should have had 12s rather easily. Now the car is a working progress. It was and kindof still is in rather poor shape from the lack of care by previous owners. Judging by the rest of the car, I need to go over it completely and do any and all maintenance I can. I didn't feel any tire spin at all. I recently replaced the transmission, roughly 4-6 weeks ago. Im starting to wonder if the trans is slipping on me because the converter used to hit rather hard at 3600 and now I just don't feel it. I thought I was just getting the feel for it but now im wondering if I have a problem. Is there any way to check for slippage? I am open to suggestions to help me go faster

RevGTO

iTrader: (12)

You're really groping in the dark without a tuning program to log what's going on.

As you can see from my sig, my car typically runs mid-12's. Went to the track last October and it wouldn't get out of 13's at about 104. I could tell from my logs that it was going lean above 4500 rpm.

Turned out my fuel pump was failing and not keeping pressure up at high rpm's, though the car ran perfectly in normal driving.

streetracingta

I know it comes down to preference but what tuning program do you recommend? Within the next few weeks I will have the longtubes put on with a x pipe true dual setup. So I am assuming that would put me somewhere in the same category as you and im certain im not getting 1 sec et drop from exhaust lol. Something is going on so I need to figure it out asap, I hate being slow!

RevGTO

iTrader: (12)

I have EFILive but a lot of guys use HPTuners and are happy with it. Personal preference.

These programs are expensive, but a lot of guys will readily invest thousands of dollars in performance hard parts, but shy away from spending money on a tuning program, when the most important key to the car running well is having it properly tuned and insuring it's running as spec'ed.

streetracingta

I don't mind investing into a good program because my future plans involve a turbo l92 headed 6.0. So, I know its going to be a crucial component for my future build. I already have the 6.0 donor and a 4l80e I'm just hoping to have a little fun for the time being and hope this setup survives until I get the build completely ready.

garygnu

you would benefit from some better shocks and springs,and other suspension parts..you should get a adjustable torque arm.Frost dose great mail order tunes for a great price.

35ss

i have a yank ss 4000 3.73s and mt drag radials on a 17"rim and pulled a 12.84 @106.84 with a 1.55 60. maybe the stall is killing our top end ??

RPM WS6

iTrader: (3)

What do you have in the way of power/engine mods? ~107mph is a very good trap speed for a stock A4, or even with a basic lid/catback combo. Although 12.84 does seem slow for that 60-foot and trap. I remember running 12.69 @107 with a 1.69 60-foot at one point....that was with an SY3500, DRs, lid and catback. I would expect you to be much deeper into the 12s with your trap and sixty.

How are your shift points? Without proper tuning, these will be off with a gear swap and sometimes a stall swap as well.

thunderstruck507

iTrader: (18)

Threads about track time without providing density altitude are mostly shots in the dark. A variance of going from 0DA to 3000DA (which is common to see in humid summer) can be devastating to track times.

http://www.dragtimes.com/da-density-...calculator.php

streetracingta

I agree completely... The post was a spur of the moment when I got back from the track. I am currently down at the moment installing a turbo kit so I wont have back to back data showing a variance in conditions or multiple tracks. Should be a little quicker the next time around though

35ss

sorry i meant 12.48 @106.84. Motor is all stock. what I want to know; is if that trap speed is low for those mods and if top end is affected that bad with gears and stall.?

RPM WS6

iTrader: (3)

Ah, that makes more sense then.

If the car is stock weight and all you have in terms of mods is the stall/gears combo, I don't see that trap speed as being slow at all.

35ss

Correct, its completely stock weight ; vert no less. It also has Lt headers 1 3/4 from kooks, catted y pipe, msd wires, and magnaflow catback. suspension mods are koni sa shocks. would my ss 4000 stall and those gears though be killing my top end.?