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I will be taking the 02 Z06 (stock) to the drag strip next Sunday. I have raced a C4 with automatic trans so obviously a whole new experience. I will be on street tires (Firestone Firehawks). I would like tips on initial RPM to be at on the line, tire pressure, and shift points. Any other pertinent info. will be appreciated.
Thanks Guys
Please let us know how you made out. I also strongly suggest that you look at the Z06 Fast List as well as the driver profiles.
How in the heck do you pull a 1.7 60' on street tires? That is amazing. The best I could do is a 2.08...... 25psi in the rears...very small burnout up to the line....rev it to 2000rpm.....ride the clutch a bit to avoid spinning....gradually/quickly go WOT.
How in the heck do you pull a 1.7 60' on street tires? That is amazing. The best I could do is a 2.08...... 25psi in the rears...very small burnout up to the line....rev it to 2000rpm.....ride the clutch a bit to avoid spinning....gradually/quickly go WOT.
What's your method?
Please see post #12. Track prep must be phenominal with just the right clutch release. I do not ride the clutch at all. I also heat the heck out of the F1s. BTW- My average 60' in 2007 was 1.91 with 40% of them between 1.75 and 1.89. You will also get 2.0+ when you blow the tires off. It's a very fine line.
Good luck.
Look up posts by ranger on how to launch the car or go here: www.rangeracceleration.com
These cars bonestock are capable of some incredible times in the upper 11's. Much of this has to do with the weather conditions, track prep, and especially seat time. Below is my specific method for producing great times but is derived from others.
Use Comp mode. (Saved me big time once.) As for the rest: I heat up the SCs til I get good smoke. (I do slowly pull through the water being careful not to splash any, put my tranny in 2nd gear, rev up to 4200 rpm, dump the clutch, get quickly on the brake to steady the car, and feed it throttle to 6300 til they smoke. At this point, I let off the brake and roar ahead.) Bump into the pre-stage beam then slowly creep up until the second light just comes on. My clutch release is usually between 3000 and 3600 rpm with the rear tire pressure of 24 to 27 psi depending on the track prep and temperature, fronts at max psi. I generally use Ranger's technique of full clutch release within the first 10' of travel except that I begin to feed it throttle near the very top of the clutch release. Very quick shifting is imperative. I fully lift on my 1-2, lift 1/2 way on 2-3 and 1/4 way on the 3-4. Get out of the throttle if you get into wheel hop. Ranger's shifting drills help. Track prep, engine temp (don't exceed 194*), weather conditions all affect your times greatly. You will have to make adjustments based on the conditions.
You may need to adjust your launch rpm as well as tire pressure since the stock F1s are stickier than the Firestones. I have now just installed a linelock to prevent wear and tear on the brakes and rear end.
Good luck and let us know how you do.
I certainly surprised the heck out of myself. The club brought 11 cars and I emerged the champion of the day winning 4 bracket races in a row. Best launch time was .008 (not bad for a 55 year old). best run was a 13.407@110.51. 92 degrees and humid. The place for improvement is 60 foot times as I still spin a bit at the line. Had a blast. The club is scheduled to go back in October. Cooler temps should help.
If it's your first time at the track, you'll be better off lowering your rpm's at launch. Start at about 2200 for your first pass and progressively increase it as you get a feel for the car. Trust me, if you try launching at 3000, you'll burn up the tires and clutch and run a low 13, but if you launch at around 2k you'll definitely get into the 12's. I wouldn't recommend doing a big burn out with those tires, the dont' stick any better after a big burn out and all you are really doing is heating up your clutch and this will kill tenths off your et. Just do a quick dusting of the tires and don't, I repeat, don't go into the water: drive around the water. Once you have some passes under your belt and work out the nerves, you can start to implement some different techniques. What track are you going to this weekend?
We ran at Union Grove in Wisconsin. I actually won the club event by winning 4 bracket races in a row. Best run was a 13.40 at 110.51. Shifting was actually pretty good. I need work on the 60 foot times. Most runs at about 2.34 due to some spin at the line. Had a blast though and will be going back for more.
I certainly surprised the heck out of myself. The club brought 11 cars and I emerged the champion of the day winning 4 bracket races in a row. Best launch time was .008 (not bad for a 55 year old). best run was a 13.407@110.51. 92 degrees and humid. The place for improvement is 60 foot times as I still spin a bit at the line. Had a blast. The club is scheduled to go back in October. Cooler temps should help.
Congrats. Continue to work on that 60' time as it will produce 0.15 better et for every 0.10 in 60'.