finally in the 12s with my z28
#1
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went out to maple grove raceway (~528' above sea level) this past Friday for a TnT and KOTS event. the DA was about +1540
ran with street tires on nitto zr555 that are nearly bald. aired them down to 20-21psi
still learning on how to use the 3600 performabuilt stall. been foot braking to about 2800-2900 RPMs as anything above that and the brakes wouldn't hold and I lurch forward over the line. only got 2 good runs in and the first was a 12.6@108 with a 1.9 sixty and after a half hour ran a 12.59@109. with a 1.8 sixty. caulated the DA and the last run would be a 12.3@110
both runs the car did not even spin off the line so I know I can get off the line a lot better and get a lower sixty footer. was thinking about flashing the stall and hold the RPMs at a lower area like at 1500 and slamming the pedal instead for next time.
the vid below was against a wrx wagon, cant tell if it was a wrx or sti trim. there was a pewter formula 6speed there and the guy noted he runs low 12s but from what I had seen, he was cutting low 13s with trap speeds in the 111-112mph. he said he has at least lid and LT with a 3.5" catback but before the catback was running a dump/turndown after the Y merge which netted him his low 12s, dunno if he had a tune either.
Last edited by fst100; 08-27-2018 at 05:49 AM.
#3
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thanks! I was hoping the stall would of netted an increase in mph by at least 1mph with the DA correction and better/lower sixty foot time. i'm gonna run at cecil sometime in September/October when the weather's dryer and cooler. i'll be very happy if I can muster a low 12 and be able to drive the car back home in one piece lol.
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#8
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Planning on hitting up Cecil County tonight for their first TNT for the season with a few locals. no change in my setup minus a few tweaks in my tune. the other change this time around is I'm gonna try and flash the converter instead of brake stall (foot-brake, stall break etc). hopefully nothing breaks in/around my car *knock on wood*. weather calling to be windy but hopefully not a headwind. will post when I get back with any results.
#9
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well not much to update. got 4 runs in and each progressive run my sixty foot got worse and worse ![Bang Head](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif)
my first run was the best with a 1.8 (12.43 at 112.4) then 2nd run 2.08 (12.6 at 111), followed by 2.27 (13.2 at 109) then the worse at 2.67 (14.x at 108)
I tried staging in both lanes but just couldn't hook and kept trying to maintain consistency with the stall/flash of the converter. tire pressure was at 22psi in the rears running the same nearly bald nittos zr555. did a light and short clean up of the tires. AFR ranged from 12.8 to 13.3 and shifting around 6200RPMs. at one point it shifted at 6300![Bomb](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_bomb.gif)
only good things out of this was nothing broke and I picked up 2mph but that may had been due to the track since this was at cecil and the OP I went to maple grove.
DA last night was +560 which is about where cecil is.
my car is slow against some of the other newer cars there such as 6th gen Camaro running 11.8-11.9 at 119mph and coyotes running about the same. a few other mopar 392 chargers running mid to high 11s at 116-121 and a couple quick M3s running low 11s at like 126.
a couple of my buddies ran their cars. one was a stock 2017 focus RS with a 13.3 at 108 and a tuned ford fusion sport with a 12.8 at 109 IIRC
![Bang Head](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_banghead.gif)
my first run was the best with a 1.8 (12.43 at 112.4) then 2nd run 2.08 (12.6 at 111), followed by 2.27 (13.2 at 109) then the worse at 2.67 (14.x at 108)
I tried staging in both lanes but just couldn't hook and kept trying to maintain consistency with the stall/flash of the converter. tire pressure was at 22psi in the rears running the same nearly bald nittos zr555. did a light and short clean up of the tires. AFR ranged from 12.8 to 13.3 and shifting around 6200RPMs. at one point it shifted at 6300
![Bomb](https://ls1tech.com/forums/images/smilies/LS1Tech/gr_bomb.gif)
only good things out of this was nothing broke and I picked up 2mph but that may had been due to the track since this was at cecil and the OP I went to maple grove.
DA last night was +560 which is about where cecil is.
my car is slow against some of the other newer cars there such as 6th gen Camaro running 11.8-11.9 at 119mph and coyotes running about the same. a few other mopar 392 chargers running mid to high 11s at 116-121 and a couple quick M3s running low 11s at like 126.
a couple of my buddies ran their cars. one was a stock 2017 focus RS with a 13.3 at 108 and a tuned ford fusion sport with a 12.8 at 109 IIRC