Analyze my time slip. Looking for pointers and opinion.
Thread Starter
Instructor
Joined: May 2018
Posts: 120
Likes: 5
Analyze my time slip. Looking for pointers and opinion.
Reaction - 1.097
60' - 2.184
330'- 5.817
1/8 Et - 8.613
1/8 mph - 88.92
1/4 et - 12.907
1/4 mph - 114.87
This was the best et I could get all night. After running two 13.0x back to back with a max trap of 116.
Car is a 05 manual LS2 cam, cai, headers, exhaust, tune car with street tires and dynojet @425whp/381wtq.
2nd time to the track, first time with favorable weather. I'm just curious how some veterans see these numbers and if my numbers seem to line up with my dynochart. If they don't where do I start looking?
60' - 2.184
330'- 5.817
1/8 Et - 8.613
1/8 mph - 88.92
1/4 et - 12.907
1/4 mph - 114.87
This was the best et I could get all night. After running two 13.0x back to back with a max trap of 116.
Car is a 05 manual LS2 cam, cai, headers, exhaust, tune car with street tires and dynojet @425whp/381wtq.
2nd time to the track, first time with favorable weather. I'm just curious how some veterans see these numbers and if my numbers seem to line up with my dynochart. If they don't where do I start looking?
Last edited by ltdriser; Jun 1, 2019 at 07:13 AM.
Intermediate
Joined: Jan 2019
Posts: 35
Likes: 3
From: Myrtle Beach, SC
There is a half second in your 60 foot times that are probably a combination of street tires/spinning off the line and your launch rpm. The other variable is what the DA was. Depending on the DA, and whittling the 60 foot time down you are probably pretty close to where I would guesstimate that car.
Last edited by GUM3Y; Jun 4, 2019 at 05:06 PM.
Racer
Joined: Jan 2015
Posts: 375
Likes: 31
From: San Antonio TX
Adding a 'good sized' cam will compromise your torque under the curve; sometimes significantly depending on the cam.
You may want to consider some 4.10 gears if you're still running stock.
KW
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
My very first pass with a bone stock '08 (est 360 whp) was better than your best pass. You possibly have a tuning issue, some really bad fuel, a clogged air filter, running at a high elevation track in terrible DA, or a combination of those issues. Since your 425 dyno HP (assuming that's not a phony number) should have produced much better results, I'd be checking the air filter first for a plastic bag restriction.
Thread Starter
Instructor
Joined: May 2018
Posts: 120
Likes: 5
I've went ahead and purchased HPtuners for some data logging to try to get a decent idea of what's going on. The 425, I don't think was phony. It was on the printout after the tune. I'm really interested to see what is going on. DA at the track was like 1700 feet. I just have never felt the car was running/making the power it "should". I wish I would have got before and after Dyno readings.
Thread Starter
Instructor
Joined: May 2018
Posts: 120
Likes: 5
I'm launching at 2500ish and riding the clutch a bit. Then feather/modulate the throttle the best I can to not spin. Once I am in third gear its full throttle until the end, I get into 4th just before I pass the end marker. I'm shifting at 65-6600ish. I'm not too concerned about getting the quickest time in the world, I just want trap speeds that match my dyno reading or better. I have no intention of buying drag radials or anything like that, just trying to have fun. I just feel like the car may be lacking somewhere and Im trying to determine if its the car or driver.
Last edited by ltdriser; Jun 5, 2019 at 01:15 PM.
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Heel & Toe
Joined: Jun 2018
Posts: 19
Likes: 5
More than likely driver. I got my c6 last summer and started off bottom 12s and quickly learned within a few trips to the track. Dipped into the 11s on street tires and then got radials and ended low low 11s by the end of the year. Just takes practice and learning the car. It helps to write down on each slip key points of the run. Like launch rpm, tire psi, shift points.
Intermediate
Joined: Jul 2018
Posts: 49
Likes: 3
2 tips. Stickier tires and launch technique, because Every 0.1 in 60ft equals 0.2 in ET, as a general rule.
On your first second and third shift, shift as close as you can to the red line. It almost always pays off to wind the engine out.
FWIW, in my stock 2008 C6 LS3 6-speed, I managed a 12.375 with my daughter and Luggage in the car, while we were on the Hot Rod Power Tour a few years ago at Memphis International Speedway
On your first second and third shift, shift as close as you can to the red line. It almost always pays off to wind the engine out.
FWIW, in my stock 2008 C6 LS3 6-speed, I managed a 12.375 with my daughter and Luggage in the car, while we were on the Hot Rod Power Tour a few years ago at Memphis International Speedway
Race Director
Joined: Sep 2007
Posts: 16,557
Likes: 2,108
From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
I'm launching at 2500ish and riding the clutch a bit. Then feather/modulate the throttle the best I can to not spin. Once I am in third gear its full throttle until the end, I get into 4th just before I pass the end marker. I'm shifting at 65-6600ish. I'm not too concerned about getting the quickest time in the world, I just want trap speeds that match my dyno reading or better. I have no intention of buying drag radials or anything like that, just trying to have fun. I just feel like the car may be lacking somewhere and Im trying to determine if its the car or driver.