A4 performance ques.
Thread Starter
Melting Slicks
Joined: Aug 2002
Posts: 2,324
Likes: 0
From: central NJ
A4 performance ques.
I had a couple runs on Sat. at the ECS challenge, and am confused about my trans.
1st run, trans in 3, 12.14 @ 115.64-1.88 60'
2nd run, trans in 3, 12.10@ 114.83-1.69 60'
3rd run, trans in D, 12.02@110.76-1.68 60'
Notice the difference in trap speeds between 3 and D. What gives? When my car runs in 3 it bounces off the rev limiter on its 2-3 shift. When is in D the 2-3 shift is just kinda mushy, but doesnt hit the limiter. Help!?
1st run, trans in 3, 12.14 @ 115.64-1.88 60'
2nd run, trans in 3, 12.10@ 114.83-1.69 60'
3rd run, trans in D, 12.02@110.76-1.68 60'
Notice the difference in trap speeds between 3 and D. What gives? When my car runs in 3 it bounces off the rev limiter on its 2-3 shift. When is in D the 2-3 shift is just kinda mushy, but doesnt hit the limiter. Help!?
Melting Slicks
Joined: Jun 2001
Posts: 2,743
Likes: 3
From: Davie Florida
It is not that unusual for an A4 to shift a few hundred RPM higher in 3rd at WOT than it does in DR. Your car more than likely is hitting the rev limiter because it is shifting at a higher RPM in 3rd than it does in drive. Your ET is lower in 3rd because you are hitting the limiter. Your trap speed might be lower in DR. because your tranny is shifting at a lower RPM, this lower shift point would lower your RPM in 3rd gear at the end of the 1/4 mile this would tranlate into a lower trap speed. To be sure about this you would need more than just 3 passes.
Last edited by Mitch C; Oct 24, 2004 at 10:51 PM.
Le Mans Master
Joined: Sep 2004
Posts: 7,027
Likes: 6
From: Shiloh Ohio
You need to set your rev limiter up a couple hundred rpms so you can run in 3rd, that will produce your fastest ET. I am not sure why you are bumping it in 3rd though, my A4 never hit the rev limiter when I ran in 3rd. My understanding is you will have a more agressive shift if you place your vette in 3rd as opposed to D.
Le Mans Master
Joined: Nov 2000
Posts: 7,294
Likes: 1
From: Coral Springs Florida
Originally Posted by Mitch C
It is not that unusual for an A4 to shift a few hundred RPM higher in 3rd at WOT than it does in DR.
Oh yeah..Now, you'll need a roll bar.. 
Last edited by vstella; Oct 25, 2004 at 10:08 AM.
Thread Starter
Melting Slicks
Joined: Aug 2002
Posts: 2,324
Likes: 0
From: central NJ
I have a good tune, my current redline is at 6400, and I think my shift points are set at like 6200. Would the transgo really tighten up my 2-3 shift? My 1-2 seems fine. Trans has 23000 miles on it. Probably about 30 track passes on it with DRs stall and gears.
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Le Mans Master
Joined: Sep 2004
Posts: 7,027
Likes: 6
From: Shiloh Ohio
Originally Posted by C5JONNY
I have a good tune, my current redline is at 6400, and I think my shift points are set at like 6200. Would the transgo really tighten up my 2-3 shift? My 1-2 seems fine. Trans has 23000 miles on it. Probably about 30 track passes on it with DRs stall and gears.
Le Mans Master
Joined: Nov 2000
Posts: 7,294
Likes: 1
From: Coral Springs Florida
Originally Posted by C5JONNY
Would the transgo really tighten up my 2-3 shift? My 1-2 seems fine.
It's surely one way to eleiminate the 200-300 rpms lag between shifts. I wouldn't drive an A4 without it. Cheap to buy and only about $150.00 to install by a competant trans tech. I think it will make ALL the difference in the shift quality..but that's just me
Racer
Joined: Sep 2002
Posts: 424
Likes: 0
From: Va, Beach VA
Originally Posted by C5JONNY
I had a couple runs on Sat. at the ECS challenge, and am confused about my trans.
1st run, trans in 3, 12.14 @ 115.64-1.88 60'
2nd run, trans in 3, 12.10@ 114.83-1.69 60'
3rd run, trans in D, 12.02@110.76-1.68 60'
Notice the difference in trap speeds between 3 and D. What gives? When my car runs in 3 it bounces off the rev limiter on its 2-3 shift. When is in D the 2-3 shift is just kinda mushy, but doesnt hit the limiter. Help!?
1st run, trans in 3, 12.14 @ 115.64-1.88 60'
2nd run, trans in 3, 12.10@ 114.83-1.69 60'
3rd run, trans in D, 12.02@110.76-1.68 60'
Notice the difference in trap speeds between 3 and D. What gives? When my car runs in 3 it bounces off the rev limiter on its 2-3 shift. When is in D the 2-3 shift is just kinda mushy, but doesnt hit the limiter. Help!?
Thread Starter
Melting Slicks
Joined: Aug 2002
Posts: 2,324
Likes: 0
From: central NJ
Originally Posted by Rays Vet
Off topic....c5johnny how do you launch(stall) your vet?Meaning at what rpm or do you simply flash it?Did'nt see your sig. but would like to see your combo.