New Best for the Cobra

[Tim Lester]

I went to Byron yesterday (11-9-'03) to improve my previous best of a 12.77 @ 110 mph. Got there around 11:30. Watched a little bit of racing. Then went and got in the staging lanes. Made my first pass at 12:24. Came off the line at 3000 rpm. 1.98 60 FT. Missed 2nd:mad: and missed 4th:mad:. End result is a 13.31 @ 99 mph.

Now I'm loosened up. Got back in the lanes for another pass. Made the 2nd pass at 12:32. Did the same thing. Came off the line at 3000 rpm. My 60 FT. was a 1.961. 1/8th was a 8.179 @ 88.37. End result was a 12.58 @ 112. I was happy. The car weighed 3805 lbs. with me in it.

3rd run. Made this pass at 1:02. Came off the line again at 3000 rpm. 60 FT. was a 1.976. 1/8th mi. time was 8.128 @ 88.82. End result was a 12.524 @ 111.79 mph. I was happy with the improvment.

4th run. Made this pass at 1:09. This time I took out the spare tire and jack out of the car. The car now weighed 3745 lbs. with me. Got back in the lanes. Did the same routine. Came off the line at 3000 rpm. The 60 FT. was a 1.983. 1/8th mi. time was a 8.148 @ 88.85 mph. End result was a 12.528 @ 112.59 mph.

I was happy with that 4th pass, so I went back to the pits and parked the car to let it cool down.

5th run. Made this pass at 3:23. I decided to change my launching technique, so I upped my launch RPM to 3400 rpm. This resulted in some wheel hop. Let out of it a bit. 60 FT. was a 2.035. 1/8th mi. was 8.249 @ 88.84 mph. End result was a 12.62 @ 112.98 mph. That was my best MPH of the day.

Last run. Made this pass at 3:47. Since I had wheel hopped a bit on the last pass I lowered the launch rpm back to 3000 rpm. The car came off the line good. 60 FT. was 1.965. 1/8th mi. was a 8.123 @ 88.92 mph. End result was a 12.511 @ 112.09 mph.

Since my previous best of a 12.77 @ 110.57 I have added the 12" K&N filter and uploaded the Predator Performance Tune. I am quite please with the performance of this basically stock car.

[Tim Lester]

Best Timeslip:

http://home.earthlink.net/~venomized4.6/Timeslips_DynoSheets/BestPass1251.jpg

[SVTkel]

I went to Byron yesterday (11-9-'03) to improve my previous best of a 12.77 @ 110 mph. Got there around 11:30. Watched a little bit of racing. Then went and got in the staging lanes. Made my first pass at 12:24. Came off the line at 3000 rpm. 1.98 60 FT. Missed 2nd:mad: and missed 4th:mad:. End result is a 13.31 @ 99 mph.

Now I'm loosened up. Got back in the lanes for another pass. Made the 2nd pass at 12:32. Did the same thing. Came off the line at 3000 rpm. My 60 FT. was a 1.961. 1/8th was a 8.179 @ 88.37. End result was a 12.58 @ 112. I was happy. The car weighed 3805 lbs. with me in it.

3rd run. Made this pass at 1:02. Came off the line again at 3000 rpm. 60 FT. was a 1.976. 1/8th mi. time was 8.128 @ 88.82. End result was a 12.524 @ 111.79 mph. I was happy with the improvment.

4th run. Made this pass at 1:09. This time I took out the spare tire and jack out of the car. The car now weighed 3745 lbs. with me. Got back in the lanes. Did the same routine. Came off the line at 3000 rpm. The 60 FT. was a 1.983. 1/8th mi. time was a 8.148 @ 88.85 mph. End result was a 12.528 @ 112.59 mph.

I was happy with that 4th pass, so I went back to the pits and parked the car to let it cool down.

5th run. Made this pass at 3:23. I decided to change my launching technique, so I upped my launch RPM to 3400 rpm. This resulted in some wheel hop. Let out of it a bit. 60 FT. was a 2.035. 1/8th mi. was 8.249 @ 88.84 mph. End result was a 12.62 @ 112.98 mph. That was my best MPH of the day.

Last run. Made this pass at 3:47. Since I had wheel hopped a bit on the last pass I lowered the launch rpm back to 3000 rpm. The car came off the line good. 60 FT. was 1.965. 1/8th mi. was a 8.123 @ 88.92 mph. End result was a 12.511 @ 112.09 mph.

Since my previous best of a 12.77 @ 110.57 I have added the 12" K&N filter and uploaded the Predator Performance Tune. I am quite please with the performance of this basically stock car.
Tim - were you using the goodyear stock tires on the car? If so, how far do you ride
the clutch out to get under a 2 second 60 foot time? Also I thought the Cobra weighed 3690 lbs. - did you do anything to drop some additional weight?

[RevMatt]

Last run. Made this pass at 3:47. Since I had wheel hopped a bit on the last pass I lowered the launch rpm back to 3000 rpm. The car came off the line good. 60 FT. was 1.965. 1/8th mi. was a 8.123 @ 88.92 mph. End result was a 12.511 @ 112.09 mph.

Since my previous best of a 12.77 @ 110.57 I have added the 12" K&N filter and uploaded the Predator Performance Tune. I am quite please with the performance of this basically stock car.

:hehe: How have the 18" tires/wheels helped? Did you lower the car to correct your center of gravity? :huh:
Did you load a "stock/performance" power tune from your diablo or get a personalized tune? :allhail:
I am picking up my Diablo Predator Flash-tuner tomorrow. Any suggestions?

[RevMatt]

Howdy,
Can you respond to my questions about 18" wheels and your predator tune? :huh: Is your car running lean now? What about exhaust set-up?
Matt

Last run. Made this pass at 3:47. Since I had wheel hopped a bit on the last pass I lowered the launch rpm back to 3000 rpm. The car came off the line good. 60 FT. was 1.965. 1/8th mi. was a 8.123 @ 88.92 mph. End result was a 12.511 @ 112.09 mph.

Since my previous best of a 12.77 @ 110.57 I have added the 12" K&N filter and uploaded the Predator Performance Tune. I am quite please with the performance of this basically stock car.

:hehe: How have the 18" tires/wheels helped? Did you lower the car to correct your center of gravity? :huh:
Did you load a "stock/performance" power tune from your diablo or get a personalized tune? :allhail:
I am picking up my Diablo Predator Flash-tuner tomorrow. Any suggestions?

[ausie]

I could probably answer with some insight. 18 inch wheels and tires may change the overall gear ratio to some degree if the outder diameter of the wheel and tire combination is slightly smaller than that of the 375/40-17s. The best I have run was 12.597 @ 110.16mph with 285/35-18 (18x10 RK plasma) on the rear and the front had 245/40-18 (18x8.5 RK plasma).
The rest of the car was completely stock except for the cat-back and air filter (stock air box with silencer removed) as well as the stock tune and 3/4tank full of gas including the spare tire and jack and whatever else was in the trunk at the time. My weight is about 235lbs (I did not hit the scales so not sure what the total weight was, the RK plasma wheels weigh considerably less than the stock 04 wheels) and the temps were in the low 90's. Typical launch RPM was not more than 2500.

time slip stats:
RT = 0.302
60ft = 1.874
330ft=5.319
1/8m=8.131 @ 87.46mph
1000ft=10.547
1/4 12.597 @ 110.16mph

Was my 12th pass ever made in the car (last run of the day on a 3 pass test and tune event).

[cobra freak]

my best time (the only time) 100% stock was 13.3/103 mph with street tires and it was the 1st day the track opened this summer (it was slippery). I was launching @ 2500-2700 rpm.

now i've got the mickey thompson street/drag tires, flowmaster cat back system and k&n cai. Just waiting for aug 4 to roll around (next date for street legals).
any ways i can launch @ 4000 rpm and barley lights em up....these tires are great