C6 1/4 Mile Performance Challenge
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
My avg time from 12 runs in JAN is 12.218 sec.
My avg time from 9 runs in APR is 12.237 sec.
The temp was 47 degrees and dropping in Jan (track surface was very cold)
The temp was 67 degrees and dropping in Apr (track surface temp was much warmer than air temp)
Between Jan and April runs I dropped over 150lbs off the car(less fuel,unneeded parts) and added a FAST intake that after tune and dyno made an extra 16.X rwhp. I also dropped tire psi in the rear to low 20's and raised fronts to 40+psi. I tried every possible variance at the burnout area: go through water,don't go through water, both with long burnouts. I also tried different launch techniques: no flashing the converter,1000rpm,1500rpm, close to 2000 rpm. Almost no 60ft or et change from anything.My best 60ft was in Jan, with tires at stock psi, through the water box and long burnout @ 1.926. My best this week was 1.944 after the rears were at 35psi both and going through the water box and long burn out. The only actual improvement I saw was my best Jan MPH was 119.28 and my best Apr MPH was 119.51,less than 1/2 a mile per hour.
I'm frustrated right now, there seems no headway to be made.If dropping a ton of weight and adding 16rwhp doesn't equal better ets, then ??????????
My avg time from 9 runs in APR is 12.237 sec.
The temp was 47 degrees and dropping in Jan (track surface was very cold)
The temp was 67 degrees and dropping in Apr (track surface temp was much warmer than air temp)
Between Jan and April runs I dropped over 150lbs off the car(less fuel,unneeded parts) and added a FAST intake that after tune and dyno made an extra 16.X rwhp. I also dropped tire psi in the rear to low 20's and raised fronts to 40+psi. I tried every possible variance at the burnout area: go through water,don't go through water, both with long burnouts. I also tried different launch techniques: no flashing the converter,1000rpm,1500rpm, close to 2000 rpm. Almost no 60ft or et change from anything.My best 60ft was in Jan, with tires at stock psi, through the water box and long burnout @ 1.926. My best this week was 1.944 after the rears were at 35psi both and going through the water box and long burn out. The only actual improvement I saw was my best Jan MPH was 119.28 and my best Apr MPH was 119.51,less than 1/2 a mile per hour.
I'm frustrated right now, there seems no headway to be made.If dropping a ton of weight and adding 16rwhp doesn't equal better ets, then ??????????
Race Director
Joined: Feb 2006
Posts: 11,733
Likes: 15
From: SC
My avg time from 12 runs in JAN is 12.218 sec.
My avg time from 9 runs in APR is 12.237 sec.
The temp was 47 degrees and dropping in Jan (track surface was very cold)
The temp was 67 degrees and dropping in Apr (track surface temp was much warmer than air temp)
Between Jan and April runs I dropped over 150lbs off the car(less fuel,unneeded parts) and added a FAST intake that after tune and dyno made an extra 16.X rwhp. I also dropped tire psi in the rear to low 20's and raised fronts to 40+psi. I tried every possible variance at the burnout area: go through water,don't go through water, both with long burnouts. I also tried different launch techniques: no flashing the converter,1000rpm,1500rpm, close to 2000 rpm. Almost no 60ft or et change from anything.My best 60ft was in Jan, with tires at stock psi, through the water box and long burnout @ 1.926. My best this week was 1.944 after the rears were at 35psi both and going through the water box and long burn out. The only actual improvement I saw was my best Jan MPH was 119.28 and my best Apr MPH was 119.51,less than 1/2 a mile per hour. I'm frustrated right now, there seems no headway to be made.If dropping a ton of weight and adding 16rwhp doesn't equal better ets, then ??????????
My avg time from 9 runs in APR is 12.237 sec.
The temp was 47 degrees and dropping in Jan (track surface was very cold)
The temp was 67 degrees and dropping in Apr (track surface temp was much warmer than air temp)
Between Jan and April runs I dropped over 150lbs off the car(less fuel,unneeded parts) and added a FAST intake that after tune and dyno made an extra 16.X rwhp. I also dropped tire psi in the rear to low 20's and raised fronts to 40+psi. I tried every possible variance at the burnout area: go through water,don't go through water, both with long burnouts. I also tried different launch techniques: no flashing the converter,1000rpm,1500rpm, close to 2000 rpm. Almost no 60ft or et change from anything.My best 60ft was in Jan, with tires at stock psi, through the water box and long burnout @ 1.926. My best this week was 1.944 after the rears were at 35psi both and going through the water box and long burn out. The only actual improvement I saw was my best Jan MPH was 119.28 and my best Apr MPH was 119.51,less than 1/2 a mile per hour.
I'm frustrated right now, there seems no headway to be made.If dropping a ton of weight and adding 16rwhp doesn't equal better ets, then ??????????But remember, temperature and weather has a HUGE effect on times. Your best times were run in 20 degree cooler weather, being our cars are sensative to air temp, you could be "losing" all that extra hp. You might just have to wait till the weather gets cool again to get a better picture of how much faster your car is.
Tires will also effect your times. Might want to see if you can borrow a set of rims/DR's and make a few passes. I'm pretty sure your ET will drop a bit and your trap will increase.
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 32
From: Central Florida
Evilways,
(1) Wheelspin. When you launch your car in its current configuration, do you get any wheel spin? If so, how much?
(2) Throttle Squeeze. How many feet of forward movement before your throttle foot is on the floor?
Ranger
(1) Wheelspin. When you launch your car in its current configuration, do you get any wheel spin? If so, how much?
(2) Throttle Squeeze. How many feet of forward movement before your throttle foot is on the floor?
Ranger
Last edited by Ranger; Apr 15, 2007 at 10:08 AM.
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
Thanks for all the input. I get really bent out of shape with these things. Until Jan, I hadn't been to a track in over a year and I'm amazed at how much technique and info I didn't retain from the other 5+ years I ran my 2000 TA. I need to try the "squeeze the egg" approach as well as trying to do better without using the waterbox. Thanks again to all you guys and I'll post up whatever improvements in the future.
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Thanks for all the input. I get really bent out of shape with these things. Until Jan, I hadn't been to a track in over a year and I'm amazed at how much technique and info I didn't retain from the other 5+ years I ran my 2000 TA. I need to try the "squeeze the egg" approach as well as trying to do better without using the waterbox. Thanks again to all you guys and I'll post up whatever improvements in the future.
I need to try the approach to see how much it helps from eliminating TM. One other thing, I think TM really screws up our cars as far as responding to lower DA's. I never run as quick as I think I should in lower DA's.
Instructor
Joined: Jan 2006
Posts: 176
Likes: 1
From: Asheville NC
Here's the stats from my best slips from Jan.(pre FAST) and last night. I would really appreciate it if some of you guys can hand out some insight to as what the deal is. BTW, I'd really like to see the total stats from the convertable's runs to see where I need improvement as well. I'm only around 20RWHP off from his numbers and quite a bit lighter(200lbs).
Jan run:R/T .420
60 1.939
330 5.258
1/8 7.900
mph 92.82
1000 10.173
1/4 12.059
mph 119.18
Apr. run:R/T .320
60 1.944
330 5.311
1/8 7.96
mph 94.03
1000 10.248
1/4 12.137
mph 119.05
Overall, I had more low 12.1's in Jan, but I felt like the tires were slipping more,last night, it felt like I was getting better traction, but acording to my 60ft and ETs, I was much slower. The MPHs stayed an avg of 1mph faster over all the runs this time. Take into account that I had a full tank of gas, stock tire pressure and had done no weight removal the first run, as well as a 40 degree surface temp and was pre FAST install during the Jan run. For the April runs I had the tires at 41psi front,27psi rear,shaved a total of 100+lbs from the car(weight removal and > half tank of gas , and the FAST installed.Any help would be appreciated and Ranger, I'd like some input from you as well if thats cool.
Jan run:R/T .420
60 1.939
330 5.258
1/8 7.900
mph 92.82
1000 10.173
1/4 12.059
mph 119.18
Apr. run:R/T .320
60 1.944
330 5.311
1/8 7.96
mph 94.03
1000 10.248
1/4 12.137
mph 119.05
Overall, I had more low 12.1's in Jan, but I felt like the tires were slipping more,last night, it felt like I was getting better traction, but acording to my 60ft and ETs, I was much slower. The MPHs stayed an avg of 1mph faster over all the runs this time. Take into account that I had a full tank of gas, stock tire pressure and had done no weight removal the first run, as well as a 40 degree surface temp and was pre FAST install during the Jan run. For the April runs I had the tires at 41psi front,27psi rear,shaved a total of 100+lbs from the car(weight removal and > half tank of gas , and the FAST installed.Any help would be appreciated and Ranger, I'd like some input from you as well if thats cool.
Instructor
Joined: Jan 2006
Posts: 176
Likes: 1
From: Asheville NC
Here's the stats from my best slips from Jan.(pre FAST) and last night. I would really appreciate it if some of you guys can hand out some insight to as what the deal is. BTW, I'd really like to see the total stats from the convertable's runs to see where I need improvement as well. I'm only around 20RWHP off from his numbers and quite a bit lighter(200lbs).
Jan run:R/T .420
60 1.939
330 5.258
1/8 7.900
mph 92.82
1000 10.173
1/4 12.059
mph 119.18
Apr. run:R/T .320
60 1.944
330 5.311
1/8 7.96
mph 94.03
1000 10.248
1/4 12.137
mph 119.05
Overall, I had more low 12.1's in Jan, but I felt like the tires were slipping more,last night, it felt like I was getting better traction, but acording to my 60ft and ETs, I was much slower. The MPHs stayed an avg of 1mph faster over all the runs this time. Take into account that I had a full tank of gas, stock tire pressure and had done no weight removal the first run, as well as a 40 degree surface temp and was pre FAST install during the Jan run. For the April runs I had the tires at 41psi front,27psi rear,shaved a total of 100+lbs from the car(weight removal and > half tank of gas , and the FAST installed.Any help would be appreciated and Ranger, I'd like some input from you as well if thats cool.
Jan run:R/T .420
60 1.939
330 5.258
1/8 7.900
mph 92.82
1000 10.173
1/4 12.059
mph 119.18
Apr. run:R/T .320
60 1.944
330 5.311
1/8 7.96
mph 94.03
1000 10.248
1/4 12.137
mph 119.05
Overall, I had more low 12.1's in Jan, but I felt like the tires were slipping more,last night, it felt like I was getting better traction, but acording to my 60ft and ETs, I was much slower. The MPHs stayed an avg of 1mph faster over all the runs this time. Take into account that I had a full tank of gas, stock tire pressure and had done no weight removal the first run, as well as a 40 degree surface temp and was pre FAST install during the Jan run. For the April runs I had the tires at 41psi front,27psi rear,shaved a total of 100+lbs from the car(weight removal and > half tank of gas , and the FAST installed.Any help would be appreciated and Ranger, I'd like some input from you as well if thats cool.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Instructor
Joined: Jan 2006
Posts: 176
Likes: 1
From: Asheville NC
Yeah, the weight diff from coupes to verts have definatively gotten closer. Alot of the weight diff I mentioned is weight I've removed and also taken into account of the 20lb diff from the vert. About 90lbs of gas less, about 30-50lbs less than stock from other weight removal from my previous times at the track and -20lbs from your vert was my estimates. I spoke with Jeff today actually and he said you pulled one heck of a launch for that run, so
I appreciate the compliment. I actually had two very good runs in the left lane with 60' times below 1.9 but in the other pass I missed 3rd, turned on the wipers, and it ran 11.89 @ 125.8. The left lane was definately better that day as my best 60' in the right lane was 2.01. If Jeff is willing your more than welcome to the specs on my cam, I would give them to you but I don't know them myself. Later!!
Instructor
Joined: Jan 2006
Posts: 176
Likes: 1
From: Asheville NC
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
Thanks man! I appreciate the compliment. I actually had two very good runs in the left lane with 60' times below 1.9 but in the other pass I missed 3rd, turned on the wipers, and it ran 11.89 @ 125.8. The left lane was definately better that day as my best 60' in the right lane was 2.01. If Jeff is willing your more than welcome to the specs on my cam, I would give them to you but I don't know them myself. Later!!
I appreciate the compliment. I actually had two very good runs in the left lane with 60' times below 1.9 but in the other pass I missed 3rd, turned on the wipers, and it ran 11.89 @ 125.8. The left lane was definately better that day as my best 60' in the right lane was 2.01. If Jeff is willing your more than welcome to the specs on my cam, I would give them to you but I don't know them myself. Later!!
Instructor
Joined: Jan 2006
Posts: 176
Likes: 1
From: Asheville NC
I'm ready to go have some more fun soon and am looking for somewhere good to go.
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
What tire pressure are you running? I found that with the RF's the logic of less pressure equals more traction is BS. The best 60's I got were with 31 psi. When I lowered the pressure the times went up. I leave at 3,000 rpm and slip the clutch until it takes a bite. I do make a conscious effort to squeeze the egg under my foot vs just dropping the hammer as hard as it is to do but it does seem to work. When are you going to the track next and where are you going? I'm ready to go have some more fun soon and am looking for somewhere good to go.
I'm ready to go have some more fun soon and am looking for somewhere good to go.
Instructor
Joined: Jan 2006
Posts: 176
Likes: 1
From: Asheville NC
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
I don't care much for racing mustangs, it's just that Rockingham, as well as a few other "local" tracks (Piedmont,Farmington) are very heavily frequented my stang owners. I do like making GT500 racers feel bad about their purchases,though..lol. Most of the differences between our cars(wa$n't me's vert and my car) seems to be that you have the manual, which produced a little more stock HP and if you have a underdrive pully( I think I saw where you listed that as a mod) . I also have stock exhaust cat back, so with those things in consideration, thats the 40RWHP diff in the cars. All in all , I think the cams are very similar in specs.Jeff's gonna try to work me in soon, he's been swamped as of late, to work out a bug or two.I'm also wondering if that since I had the car dropped a little on the stock bolts if it affected the weight transfer to the rear during launch costing me 60ft times. Anyone have input on this?
Race Director
Joined: Aug 2000
Posts: 10,649
Likes: 32
From: Central Florida
Ranger
Melting Slicks
Joined: Oct 2006
Posts: 2,905
Likes: 1
Wheels spin: well, in JAN it seemed to spin alot more than last weekend, but I could still hear a little"whistling" a few feet off the launch before the 1-2 shift, but not during the 2-3 like in JAN.
Throttle Squeeze:Well..there really isn't much travel before I floor it, but I do take the slack out of the drivetrain by holding the brake down and "flashing" the converter a little rather than just punching it at the light. I've flashed from barely over idle up to 2000 rpm over different launches, the 60 stays about the same. I do need to try and ease into the throttle, though, and maybe the times will be a little better. I'm just used to my 547RWHP 2000 TA at the track. I could flash it to 3200-3400 and stab the throttle and get 1.5's easy.
Sorry that I wasn't completly clear that your post was a direct question.
Instructor
Joined: Jan 2006
Posts: 176
Likes: 1
From: Asheville NC
Well, when I go and if you're there, I expect to see that vert run too
I don't care much for racing mustangs, it's just that Rockingham, as well as a few other "local" tracks (Piedmont,Farmington) are very heavily frequented my stang owners. I do like making GT500 racers feel bad about their purchases,though..lol. Most of the differences between our cars(wa$n't me's vert and my car) seems to be that you have the manual, which produced a little more stock HP and if you have a underdrive pully( I think I saw where you listed that as a mod) . I also have stock exhaust cat back, so with those things in consideration, thats the 40RWHP diff in the cars. All in all , I think the cams are very similar in specs.Jeff's gonna try to work me in soon, he's been swamped as of late, to work out a bug or two.I'm also wondering if that since I had the car dropped a little on the stock bolts if it affected the weight transfer to the rear during launch costing me 60ft times. Anyone have input on this?
I don't care much for racing mustangs, it's just that Rockingham, as well as a few other "local" tracks (Piedmont,Farmington) are very heavily frequented my stang owners. I do like making GT500 racers feel bad about their purchases,though..lol. Most of the differences between our cars(wa$n't me's vert and my car) seems to be that you have the manual, which produced a little more stock HP and if you have a underdrive pully( I think I saw where you listed that as a mod) . I also have stock exhaust cat back, so with those things in consideration, thats the 40RWHP diff in the cars. All in all , I think the cams are very similar in specs.Jeff's gonna try to work me in soon, he's been swamped as of late, to work out a bug or two.I'm also wondering if that since I had the car dropped a little on the stock bolts if it affected the weight transfer to the rear during launch costing me 60ft times. Anyone have input on this?
I look forward too it! I do have underdrive pulleys which Lingenfelter claim offer between 5 and 10 RWHP (Jeff says 5) depending on the other mods and I have a full after market exhaust. That's probably the biggest differences in the cars other than the tranny. I like you enjoy making the boys with more money than sense regret their purchase! My most recent victem was an 03 twin turbo 911 carera, you should have seen his face when I opened up that can of whip a$$ on him. He tried and failed 3 times before he rolled the window down and gave me the thumbs up. It was hillarious!