C6 1/4 Mile Performance Challenge
Intermediate
Joined: Dec 2004
Posts: 48
Likes: 0
From: Chesapeake Va
help
Classic error is creating the discrepancy.
The ideal shift point in a near stock LS2 (LS6, LS7) is right before the rev limiter in every gear.
Short shifting the 3-4 is hurting the acceleration of the car.
Simple fix. Don't short-shift. Short-shifting adversely affects both ET and trap speed.
Ranger
The ideal shift point in a near stock LS2 (LS6, LS7) is right before the rev limiter in every gear.
Short shifting the 3-4 is hurting the acceleration of the car.
Simple fix. Don't short-shift. Short-shifting adversely affects both ET and trap speed.
Ranger
Pro
Joined: Mar 2007
Posts: 565
Likes: 0
From: Peekskilll NY
anyone have any ideas where I can make up some time on my runs other than doing some smokey burnouts before hand to heat up tires a bit...also what is the best 60' that people are pulling with the stock z51 runflats?
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
Quick tire clean off
Rev to 2k, ride the clutch a little, fully engage, pour it on pretty quickly
1st-2nd gear shift at redline (speed shift)
2nd-3rd gear shift at redline (speed shift)
3rd-4th gear short shift (very hard) at about 5,500
cross the line
Since I'm in 3rd almost the whole way from the 1/8 to 1/4, I wonder if 3rd gear in the base isn't as strong as 1st and 2nd. Maybe next time I'll have to try and shift a little sooner yet and see what happens.
Any thoughts?
pkstr
Rev to 2k, ride the clutch a little, fully engage, pour it on pretty quickly
1st-2nd gear shift at redline (speed shift)
2nd-3rd gear shift at redline (speed shift)
3rd-4th gear short shift (very hard) at about 5,500
cross the line
Since I'm in 3rd almost the whole way from the 1/8 to 1/4, I wonder if 3rd gear in the base isn't as strong as 1st and 2nd. Maybe next time I'll have to try and shift a little sooner yet and see what happens.
Any thoughts?
pkstr
I think it's marginally faster to not shift gears to 4th if you can do so. Any shift takes some time and you probably aren't getting much additional acceleration in 4th. A well set up car is at redline just past the traps. Plus as someone posted in another thread, if you are bracket racing and need just a little kick at the line to beat an opponent to the stripe, 3rd is much more peppy that 4th for that. As you know it jumps back and forth in 3rd when you are close to redline and you floor it or let off it and sometimes that's all you need.
Racer
Joined: Apr 2006
Posts: 380
Likes: 0
From: Spring Lake MI
Be careful banging 4th. You don't really gain much even powershifting 4th IHMO and I've seen 3 of my buddy's trannys go bad from shifting hard... and it always starts with 4th gear going out.
I think it's marginally faster to not shift gears to 4th if you can do so. Any shift takes some time and you probably aren't getting much additional acceleration in 4th. A well set up car is at redline just past the traps. Plus as someone posted in another thread, if you are bracket racing and need just a little kick at the line to beat an opponent to the stripe, 3rd is much more peppy that 4th for that. As you know it jumps back and forth in 3rd when you are close to redline and you floor it or let off it and sometimes that's all you need.
I think it's marginally faster to not shift gears to 4th if you can do so. Any shift takes some time and you probably aren't getting much additional acceleration in 4th. A well set up car is at redline just past the traps. Plus as someone posted in another thread, if you are bracket racing and need just a little kick at the line to beat an opponent to the stripe, 3rd is much more peppy that 4th for that. As you know it jumps back and forth in 3rd when you are close to redline and you floor it or let off it and sometimes that's all you need.
Do others with base gearing shift into 4th?
Thanks!
pkstr
Racer
Joined: Apr 2006
Posts: 380
Likes: 0
From: Spring Lake MI
Classic error is creating the discrepancy.
The ideal shift point in a near stock LS2 (LS6, LS7) is right before the rev limiter in every gear.
Short shifting the 3-4 is hurting the acceleration of the car.
Simple fix. Don't short-shift. Short-shifting adversely affects both ET and trap speed.
Ranger
The ideal shift point in a near stock LS2 (LS6, LS7) is right before the rev limiter in every gear.
Short shifting the 3-4 is hurting the acceleration of the car.
Simple fix. Don't short-shift. Short-shifting adversely affects both ET and trap speed.
Ranger
Looking forward to making some more runs..we'll see if I can improve a little more yet!!
Thanks!
pkstr
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
My A6 passes through the 1/4 at about 6K rpm in third using "S" mode.Couldn't ask for better in that aspect. Also, the run flat 60ft times question, best I've done is mid 1.9's but others here have fared better.
Burning Brakes
Joined: Feb 2005
Posts: 1,099
Likes: 1
From: Branford Connecticut
Callaway Corvette Conv w/A6: 11.285 @ 126.48
From October 2006.
the car:
2006 Callaway SuperCharged Corvette Convertible
A6 (Paddle-Shift Automatic Transmission, stock)
w/Optional "616 HP" Package:
Magna Charger, Honker CAI, Heads, Cam, Mufflers
Drag radials
No headers
Stock rear axle ratio
the car:
2006 Callaway SuperCharged Corvette Convertible
A6 (Paddle-Shift Automatic Transmission, stock)
w/Optional "616 HP" Package:
Magna Charger, Honker CAI, Heads, Cam, Mufflers
Drag radials
No headers
Stock rear axle ratio
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Pro
Joined: Mar 2007
Posts: 565
Likes: 0
From: Peekskilll NY
Well the car now has 1000 miles and time for some more 1/4 mile action...today the humidity was over 65% and was really seen in the mph's but I did get better on the launch's and got 3 2.0XX 60's in but I botched one of them with a missed 3rd gear...below are the times from today and the best times from previous...the car has a vararam and a predator base tune...I am trying to see where to improve my times before I start doing burnouts with these tires (right now I just spin them a tiny bit coming to the line to get dirt off them)...if I shift 2nd any faster the car just spins a ton and I can't get myself to shift 3rd or 4th any faster...I am shifting at redline so I might start playing with shift points but I don't know...I guess its time to start doing burnouts and getting some 1.9s...
Date 21-Apr 3-May 8-May 8-May
r/t 1.421 0.749 2.461 2.507
60' 2.143 2.074 2.038 2.012
330 5.508 5.506 5.423 5.451
1//8 8.283 8.291 8.206 8.252
MPH 89.75 89.5 89.45 89.07
1000 10.621 10.632 10.553 10.606
1//4 12.597 12.615 12.539 12.596
MPH 114.28 113.93 113.78 113.57
Video 1
Video 2
Date 21-Apr 3-May 8-May 8-May
r/t 1.421 0.749 2.461 2.507
60' 2.143 2.074 2.038 2.012
330 5.508 5.506 5.423 5.451
1//8 8.283 8.291 8.206 8.252
MPH 89.75 89.5 89.45 89.07
1000 10.621 10.632 10.553 10.606
1//4 12.597 12.615 12.539 12.596
MPH 114.28 113.93 113.78 113.57
Video 1
Video 2
bump for adding to the list...
Instructor
Joined: Oct 2006
Posts: 126
Likes: 0
From: London Ontario
Just got back from St Thomas Dragway near London Ontario. Bone stock 05 vert A4 3.15 F55. Best ET pass was a 12.72 @110.85. Best MPH pass was a 12.80 @ 113.06. Huge improvement from last fall. Ran a best of 13.40 in October. Only difference was 87 to 94 octane and a clean cheap paper air filter. Is my 12.72 considered to be good for a vert? What is the average for a stock 05 vert? Can I be moved up the ranks? Thanks guys.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Very good times overall though.
Safety Car
Joined: Jun 2005
Posts: 4,905
Likes: 569
From: Bucks County PA
Angelo -
Nice runs!
I'll bet in cooler fall and winter weather you run even better, 12.3-12.5s
My 2005 A4/3.15 VERT in March 2006 ran a 12.57@110.67 on my 3rd and final pass of the day, the other two runs were lousy, hot lapped when the car 1st got to the track resulting in 12.99@107.0 and 12.90@107.7.
Only mod was a Magnaflow catback, but as we all know that makes no power difference and the car was fairly tight with only 2500 miles on it.
Your 113mph trap speed really surprises me, that is very high for an A4/3.15 car.
Congrats!
Howard
Nice runs!
I'll bet in cooler fall and winter weather you run even better, 12.3-12.5s
My 2005 A4/3.15 VERT in March 2006 ran a 12.57@110.67 on my 3rd and final pass of the day, the other two runs were lousy, hot lapped when the car 1st got to the track resulting in 12.99@107.0 and 12.90@107.7.
Only mod was a Magnaflow catback, but as we all know that makes no power difference and the car was fairly tight with only 2500 miles on it.
Your 113mph trap speed really surprises me, that is very high for an A4/3.15 car.
Congrats!
Howard
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Tech Contributor
Joined: Jul 2002
Posts: 14,950
Likes: 264
From: St. Louis, MO
St. Jude Donor '08
I guarantee it works. I've logged runs with HP Tuners with a C6 Z06 and its tiny CAI scoop, and it gets close to ambient by 1/8 or so. I wish I'd heard of this before I bought the Vararam, I'd love to do some HP Tuners logging on the bent shroud mod. I bet the 08 intake (same as Z06) combined with the bent shroud would be a great combination.
Safety Car
Joined: Jun 2005
Posts: 4,905
Likes: 569
From: Bucks County PA
I have been thinking of doing it, but from pics I have seen it looks a little sloppy from the front.
I also have thought about drilling holes like I did last time, pretty much invisible, but I hate to hack up my car.
Oh no, I'm turning in to a POSER
Howard
I also have thought about drilling holes like I did last time, pretty much invisible, but I hate to hack up my car.
Oh no, I'm turning in to a POSER
Howard
Instructor
Joined: Oct 2006
Posts: 126
Likes: 0
From: London Ontario
I'm happy with my 12.72 run the other night. Not sure if it counts as a mod or not but I did have the rad shroud pryed open a bit. Just wondering, the stock cars running low 12's, what small changes are they making to their cars that are not considered mods? (filters, fuel, tires, tune etc..) I was running the stock tires on a track that was slippery, outside temp was 14 deg C, and 46% humidity. Are these low 12 times only happening on perfect weather days and fully prepped tracks, or is it a certain location where the faster times are being recorded?
Race Director
Joined: May 2001
Posts: 15,324
Likes: 2,080
From: Guelph, Ontario
I'm happy with my 12.72 run the other night. Not sure if it counts as a mod or not but I did have the rad shroud pryed open a bit. Just wondering, the stock cars running low 12's, what small changes are they making to their cars that are not considered mods? (filters, fuel, tires, tune etc..) I was running the stock tires on a track that was slippery, outside temp was 14 deg C, and 46% humidity. Are these low 12 times only happening on perfect weather days and fully prepped tracks, or is it a certain location where the faster times are being recorded?
The lower times on the list are for a few reasons. For one, St Thomas is not a very sticky track anymore. With the old owners it used to hook really well, but the current owner doesn't care at all. You'd run a better time at Cayuga (now known as TMP) Also, even though the weather was cool when you ran your 12.7, there is still a couple of tenths improvement to be had with even colder weather. The 12.21 best time for instance, was done in NJ (at sea level, vs about 700ft above for St Thomas) on a colder day. His car also has the 6 speed auto, which is at least a tenth or two quicker than a 3.15 geared A4 car.
I personally think that if you take your car to Cayuga late in the fall (mid November for instance) that you could probably squeak into the 12.4s (12.45 to 12.49) I ran my 12.81 at Cayuga in November last year, on a very cold day (about 2 or 3C) and the track was hooking very well.
Instructor
Joined: Oct 2006
Posts: 126
Likes: 0
From: London Ontario
Thought I'd post a clip of two passes at St.Thomas Dragway. My car was the 05 vert A4, 3.15,F55 my friend was driving his 05, A4,3.15. These were his first two passes ever at a track. Hope I do this right, never posted a video before.
http://www.youtube.com/watch?v=JdF3vsa98sM
http://www.youtube.com/watch?v=JdF3vsa98sM
Le Mans Master
Joined: Dec 2004
Posts: 5,759
Likes: 539
From: AZ
St. Jude Donor '06-'08-'10-'11-'12-'13 '14-'15-'16-'17-'18-'19
1/8 mile run time
Ran today a 1/8 mile track. Unfortunately they didn't trap the speeds so all I have is an ET. This is an 05, A4, 3.15 gears, corsa catbacks, Hall intake and cold air mod, and a tune.
Best ET was 8.428 but that seems to have been an anomaly. Average for 9 runs was 8.53.
So without a trap speed, can I still be on the list?
Best ET was 8.428 but that seems to have been an anomaly. Average for 9 runs was 8.53.
So without a trap speed, can I still be on the list?