Two guys, two mods, and a tune... in the 11's
Aug 14, 2009, 07:43 PM
#470
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Aug 15, 2009, 10:31 AM
#472
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The 4 mph gain was over Jim's mph on his best previous ET. His best MPH WAS 113.35, now it's 116.58. Following the first run of 12.008 @ 116.58, the Engineer and I sat down and reviewed the data. First of all, the 2 step was at ~6840. The tire psi was 28. The launch was soft with only 8.x psi of boost and the tires needed more. Very, very little spin and the result was only a 1.74 I b elieve, but a good first run. With the same settings on the mbc (never moved from last night) we observed the highest 2 byte loads we've seen. Could this be the tires working instead of spinning. It looks like it. At ORP the launches were consistent 310-315 loads. Tonight, we saw 327 immediately when the peak boost came in. A picture taken by the Hoosier Engineer showed no 'wrap' although the car was squatting well. Again 28 psi in the tires.
Now, as for the higher MPH, this was due to a couple of reasons. Track is probably 2 mph faster (I've been told) and the rolling resistence on the tire is less than the BFG. Previous tests by Hoosier has shown gains and losses in that dept and it appears as though we're seeing the benefits of the gains. The 2 lbs less tire weight is also allowing greater accelleration, so it's a complete package deal. 116.58 isn't too shabby for the mods. As for the ET, a solid 11.8 was at hand when the ugly nlts caused timing to be pulled. At this point, I have to say, Jim and I are worn slick by the time we got to the track. As I got back to the Hotel, we had driven 465 miles and been up for 21 hours. Jim's timing on the shifts was off and the ET's suffered. As for the tires, no question they HOOK UP! Who ever runs these will need some 2 step, boost and very little concern for track prep. I wish we had been able to launch them consistently at 13-14 psi, but Jim's legs were giving out on him at the line and he was having difficulty holding the car back. To help him a little, I changed the 2step timing by 1 degree and boost went back through the roof on the launch, with 21.9 psi showing by the time the wheel sensors showed any vehicle speed. It looks like it made about 18 psi in less time than it took to make 8 psi on the previous run. For those wanting more dimensions, the tires are 25.6" tall, 10" section width with contact patch about 8.375". Less tire pressure will yield a wider contact area. Hope that helps for the night. I'm getting some sleep.
Now, as for the higher MPH, this was due to a couple of reasons. Track is probably 2 mph faster (I've been told) and the rolling resistence on the tire is less than the BFG. Previous tests by Hoosier has shown gains and losses in that dept and it appears as though we're seeing the benefits of the gains. The 2 lbs less tire weight is also allowing greater accelleration, so it's a complete package deal. 116.58 isn't too shabby for the mods. As for the ET, a solid 11.8 was at hand when the ugly nlts caused timing to be pulled. At this point, I have to say, Jim and I are worn slick by the time we got to the track. As I got back to the Hotel, we had driven 465 miles and been up for 21 hours. Jim's timing on the shifts was off and the ET's suffered. As for the tires, no question they HOOK UP! Who ever runs these will need some 2 step, boost and very little concern for track prep. I wish we had been able to launch them consistently at 13-14 psi, but Jim's legs were giving out on him at the line and he was having difficulty holding the car back. To help him a little, I changed the 2step timing by 1 degree and boost went back through the roof on the launch, with 21.9 psi showing by the time the wheel sensors showed any vehicle speed. It looks like it made about 18 psi in less time than it took to make 8 psi on the previous run. For those wanting more dimensions, the tires are 25.6" tall, 10" section width with contact patch about 8.375". Less tire pressure will yield a wider contact area. Hope that helps for the night. I'm getting some sleep.
9sec9 is on his way to Norwalk with our R&D tires, Street this Evo will be testing them tomorrow. With running flat out over the last two weeks to finish 9sec9's car and get other projects done, I was run down by the last pass on Thursday night. We got up at 4:30 Friday morning and were running till 1:00A.M.. I passed on bone marrow treatment last week to get this testing done and I thought I'd be able to get through the weekend. Last night I was out of sync from the first pass, NLTS's without realizing I was doing it, and was not comfortable driving at all. After three passes we loaded up. We decided this morning instead of taking my car to Norwalk, we would test these on a higher horsepower car to keep things moving forward to getting these into production. I'm going to take a few days off to rest up before returning to the track next Thursday. If all goes well tomorrow we might give the green light for production next week. Thanks, Indy
Last edited by Indy Evo; Aug 15, 2009 at 10:35 AM.
Aug 15, 2009, 10:27 PM
#474
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take care of yourself Indy, there will always be time for racing. From one racer to another, I pray for you to have good health. Keep on rocking and showing us young'uns what's up
Aug 16, 2009, 07:15 AM
#476
haha Are you serious?? SO CLOSE! That MPH jumped up a good bit too...damn...Was this done on straight 93 oct. or are you guys still mixing it with something a little higher?? Hey Indy get your health back on par so we can finally see those 11s...
Good luck next time out...
Good luck next time out...
Aug 17, 2009, 06:34 PM
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So much for resting, I just finished going over the car and everything is good to go for testing later this week. I decided to get it done today, and now I can rest for the rest of the week
.
Last edited by Indy Evo; Aug 17, 2009 at 07:46 PM.
Aug 18, 2009, 05:55 AM
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Just to bring everyone up to speed on this project, we are still running just a MBC, filter, and a 9sec9 tune for engine mods. We replaced the clutch with a Quarter Master 7.25 dual disk after the stock unit started to slip after 30,000 miles plus and over 34 hard launches this year. We have just started testing of the R&D version of the new Hoosier 245/45/17 drag radial which is looking like the tire to have for the weekend warrior. The best run to date is 12.008 @ 116.58 using Shell 101 unleaded. This is still with the complete stock exhaust including the factory cat. The car has run at least ten 12.0's and still has all the factory emission equipment as delivered with the exception of the stock air box.
Last edited by Indy Evo; Aug 18, 2009 at 05:10 PM.