Backhalf numbers
Thread Starter
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
Backhalf numbers
I ran the car tonight and tried a new approach to tame our slick track.
I left at 2000 and got 1/2 throttle as it moved out then matted it. No tire spin. Even netted a 1.59 60ft. Car would be bad *** on a dead hook track.
Anyway, on that run, it went 7.14 @ 98.8 in the 1/8 mile, and 11.18 @ 121 in the 1/4 mile.
Thats only 22mph on the back half which just seems wrong.
So, you A4 guys who run in this range, what are your back half numbers?
I was reviewing my good runs from last year, and it was 23 on the back half, not quite as fast in the 1/8 mile.
We did have a smidge of a head wind, and I don't run skinnies up front...although I do have some.
Just curious.....
FWIW...my son went to the track 60 miles south, ran 12.2 which is 2 tenths better than he has run at my track....and they sprayed throughout the evening. You can bet I'll go down and try a REAL dragstrip soon!
Ron
I left at 2000 and got 1/2 throttle as it moved out then matted it. No tire spin. Even netted a 1.59 60ft. Car would be bad *** on a dead hook track.
Anyway, on that run, it went 7.14 @ 98.8 in the 1/8 mile, and 11.18 @ 121 in the 1/4 mile.
Thats only 22mph on the back half which just seems wrong.
So, you A4 guys who run in this range, what are your back half numbers?
I was reviewing my good runs from last year, and it was 23 on the back half, not quite as fast in the 1/8 mile.
We did have a smidge of a head wind, and I don't run skinnies up front...although I do have some.
Just curious.....
FWIW...my son went to the track 60 miles south, ran 12.2 which is 2 tenths better than he has run at my track....and they sprayed throughout the evening. You can bet I'll go down and try a REAL dragstrip soon!
Ron
Burning Brakes
Joined: Feb 2012
Posts: 1,047
Likes: 43
From: Longview Texas
Ron,
The last time we were out we only run low 12s and 110mph in the 1/4 so I don't know if this will help you or not but we pick up 23mph in the second 1/8. 1.59 60' is pretty impressive rolling into it. Our best is 1.60 and we dead-hook. New 295/50/16 Hoosier drag radials are here so when the new wheels arrive I'm anxious to try them and see if we can dip into the 1.5x range. Oh yeah, I do run skinnies ... I picked up 3mph from those over the OEM wheels.
The last time we were out we only run low 12s and 110mph in the 1/4 so I don't know if this will help you or not but we pick up 23mph in the second 1/8. 1.59 60' is pretty impressive rolling into it. Our best is 1.60 and we dead-hook. New 295/50/16 Hoosier drag radials are here so when the new wheels arrive I'm anxious to try them and see if we can dip into the 1.5x range. Oh yeah, I do run skinnies ... I picked up 3mph from those over the OEM wheels.
Le Mans Master
Joined: Mar 1999
Posts: 6,028
Likes: 84
From: Palm Coast, FL
air conditions could have been a little different too, I lost 3 mph from Nov to when I ran in March. March was just crappy air in comparison.
Have you ran with the skinny's? You are knocking at 10's door
Have you ran with the skinny's? You are knocking at 10's door
Thread Starter
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
I've only tried the skinnys once, didn't seem to make a diff, but diff day so who knows?
I'll air em up and try tonight. They are M/H bias....would rather have radials....oh well. The rims are GTO spares.
I'll air em up and try tonight. They are M/H bias....would rather have radials....oh well. The rims are GTO spares.
Le Mans Master
Joined: Nov 2005
Posts: 7,057
Likes: 363
From: Kendall Park NJ
Good luck.
Thread Starter
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
Boy are they. You can put them on with one hand! Also, I actually have run my best numbers with the smaller Hoosier 245/45 on thin spokes vs. the 275/40's on Z06 wheels. They are also lighter....maybe I'll try that combo tonight.
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Thread Starter
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
Well, with the skinnies, the car did mph better, but I was tweaking the tune. About 1 mph. ET was no better than yesterday.
I noticed something interesting....the left lane showed 25.5 mph on the back half, the right lane showed 23mph.
Left lane 97 mph, right lane 99mph. 660ft.
I think the clocks are all messed up, as is the starting line. I never even tried leaving full throttle, and still spun bad on 2 runs....
All runs over 122 after I found what it liked for AF ratio, which btw is 12.2:1
Ron
I noticed something interesting....the left lane showed 25.5 mph on the back half, the right lane showed 23mph.
Left lane 97 mph, right lane 99mph. 660ft.
I think the clocks are all messed up, as is the starting line. I never even tried leaving full throttle, and still spun bad on 2 runs....
All runs over 122 after I found what it liked for AF ratio, which btw is 12.2:1
Ron
Le Mans Master
Joined: Aug 2007
Posts: 6,473
Likes: 297
From: Orange Park FL
I ran the car tonight and tried a new approach to tame our slick track.
I left at 2000 and got 1/2 throttle as it moved out then matted it. No tire spin. Even netted a 1.59 60ft. Car would be bad *** on a dead hook track.
Anyway, on that run, it went 7.14 @ 98.8 in the 1/8 mile, and 11.18 @ 121 in the 1/4 mile.
Thats only 22mph on the back half which just seems wrong.
So, you A4 guys who run in this range, what are your back half numbers?
I was reviewing my good runs from last year, and it was 23 on the back half, not quite as fast in the 1/8 mile.
We did have a smidge of a head wind, and I don't run skinnies up front...although I do have some.
Just curious.....
FWIW...my son went to the track 60 miles south, ran 12.2 which is 2 tenths better than he has run at my track....and they sprayed throughout the evening. You can bet I'll go down and try a REAL dragstrip soon!
Ron
I left at 2000 and got 1/2 throttle as it moved out then matted it. No tire spin. Even netted a 1.59 60ft. Car would be bad *** on a dead hook track.
Anyway, on that run, it went 7.14 @ 98.8 in the 1/8 mile, and 11.18 @ 121 in the 1/4 mile.
Thats only 22mph on the back half which just seems wrong.
So, you A4 guys who run in this range, what are your back half numbers?
I was reviewing my good runs from last year, and it was 23 on the back half, not quite as fast in the 1/8 mile.
We did have a smidge of a head wind, and I don't run skinnies up front...although I do have some.
Just curious.....
FWIW...my son went to the track 60 miles south, ran 12.2 which is 2 tenths better than he has run at my track....and they sprayed throughout the evening. You can bet I'll go down and try a REAL dragstrip soon!
Ron
I found a run real close to yours and my back half is right there with you. This is my Auto, 3600 stall
11.164 @ 120.28
1.611 - sixty
7.107 @ 97.41
Pitt
Thread Starter
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
Le Mans Master
Joined: Aug 2007
Posts: 6,473
Likes: 297
From: Orange Park FL
Drifting
Joined: Jan 2004
Posts: 1,419
Likes: 6
From: Alamosa CO
Ron,
I typically pick up 30+mph on the back half, but my car is a stick with 3.42 gears and a 416 stroker. I run a CCW drag pack with 16x11.5x26" ET streets and Firestone bias front skinnies. If I only had to drive 60 miles to get to a good track, I'd do it in a heartbeat! Go there and report back, I bet you'll be pleasantly surprised!
Jimbo
I typically pick up 30+mph on the back half, but my car is a stick with 3.42 gears and a 416 stroker. I run a CCW drag pack with 16x11.5x26" ET streets and Firestone bias front skinnies. If I only had to drive 60 miles to get to a good track, I'd do it in a heartbeat! Go there and report back, I bet you'll be pleasantly surprised!
Jimbo
Thread Starter
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
I would even make the drive with my budget drag pack on the car. Sad fact about the C5, you can't pile 4 tires/wheels in it and change at the track.......Well, maybe if I took the pass seat out. 
I'll check the forecast for this Friday.
You stick guys back half quite differently. And of course you have a lot more hp than I do.
I am so gun shy of my track, I probably miss the only chance at a full throttle leave on the first pass when there is a little prep. But the car is violent when it blows the tires off, and I like my diff in one piece.
I walked out and checked the start line last night....they seem to forget to spray where the rear tires sit! Gads.....
I actually offered to give the track manager $20 to let me prep the right lane for myself....he just laughed.
Last night, I drove home on the freeway......the drag pack messed up the traction control system....I forgot to turn it off....and with the fronts being slightly taller than the rears.....well, the DIC lit up and the car decided 38mph was my top speed....rather freaked me out!
I sure wish there were a 27" bias street slick out there, but there just isn't!
Ron
I'll check the forecast for this Friday.
You stick guys back half quite differently. And of course you have a lot more hp than I do.
I am so gun shy of my track, I probably miss the only chance at a full throttle leave on the first pass when there is a little prep. But the car is violent when it blows the tires off, and I like my diff in one piece.
I walked out and checked the start line last night....they seem to forget to spray where the rear tires sit! Gads.....
I actually offered to give the track manager $20 to let me prep the right lane for myself....he just laughed.
Last night, I drove home on the freeway......the drag pack messed up the traction control system....I forgot to turn it off....and with the fronts being slightly taller than the rears.....well, the DIC lit up and the car decided 38mph was my top speed....rather freaked me out!
I sure wish there were a 27" bias street slick out there, but there just isn't!
Ron
Race Director
Joined: Dec 2006
Posts: 12,333
Likes: 2,879
From: Fort Worth, Texas
On more than one occasion I've hauled drag pack and a passenger to the track over an hour away, people gawk when they see me unload lol. Are you making a shift between the 1/8 and 1/4, also is your converter locked? To make comparisons with the skinnies, make a pass without and then swap them on the same nite as that will lessen the variables and make you a believer
I've also run across tracks that the timing equipment wasn't equal between the two lanes and that is frustrating. Good luck next time!
PS are you running a vararam?
I've also run across tracks that the timing equipment wasn't equal between the two lanes and that is frustrating. Good luck next time!PS are you running a vararam?
Thread Starter
Safety Car
Joined: Aug 2011
Posts: 4,439
Likes: 405
From: Portland OR
On more than one occasion I've hauled drag pack and a passenger to the track over an hour away, people gawk when they see me unload lol. Are you making a shift between the 1/8 and 1/4, also is your converter locked? To make comparisons with the skinnies, make a pass without and then swap them on the same nite as that will lessen the variables and make you a believer I've also run across tracks that the timing equipment wasn't equal between the two lanes and that is frustrating. Good luck next time!
PS are you running a vararam?
I've also run across tracks that the timing equipment wasn't equal between the two lanes and that is frustrating. Good luck next time!PS are you running a vararam?
I hear you on the skinnies. They would fit easily in the car to try at the track.
The car does have a vararam.
Of course last night I went to watch my son spin the tires in his S10....and it hooked excellent 4 of 7 passes. His best 60ft was 1.67....the vette would have hooked too. They actually prepped extra good for an electric car making passes.
Figures huh?
Ron
