Guest 3000GT Posted April 28, 2004 Report Share Posted April 28, 2004 Hows everybody been running at lately. Hope good. I have a ? Iam looking at buying a car that runs 7.99 in the 1/8 of a mile. What kind of a 1/4 mile time is that. Any body have a mathmatical equation or just a rough guess. All reponses would be appericated. i would have to say it would be mid 11 to high 12. Is this correct if not please let me know and thanks and good luck the rest of the year. Quote Link to comment Share on other sites More sharing options...
mjeosu27 Posted April 28, 2004 Report Share Posted April 28, 2004 Not sure, and it really depends on the setup of the car, but I think that's maybe a mid-high 12's? Some cars (read: spray) may be better after the 1/8th, where traction (or lack of being able to spray off the line) may be an issue. I dunno. Quote Link to comment Share on other sites More sharing options...
88lx5oh Posted April 28, 2004 Report Share Posted April 28, 2004 what kinda car is it, power adders?? gears? hp and tq #s... suspension mods... we'd be better able to help you out based on these answers Quote Link to comment Share on other sites More sharing options...
Guest 3000GT Posted April 28, 2004 Report Share Posted April 28, 2004 a 81 Z28 355 .20 over, 659 4bbl, turbo 350trans, 15:13 gears, 2500stall, B+M shifter. bout all i know right know. Quote Link to comment Share on other sites More sharing options...
Guest 3000GT Posted April 29, 2004 Report Share Posted April 29, 2004 hey also the 4bbl carb is a double pump 650.. i was a jackass and put 659????own myslef on that. Quote Link to comment Share on other sites More sharing options...
SamZman Posted April 29, 2004 Report Share Posted April 29, 2004 Originally posted by 3KGT: hey also the 4bbl carb is a double pump 650.. i was a jackass and put 659????own myslef on that. ahem... http://www.columbusracing.com/ubb/edit_ubb6.gif .. I'll also assume it's a 5:13 gear, and .30 over.. Anyways a 7.99 is more in the mid to maybe low 12 range, I'm guessin. Quote Link to comment Share on other sites More sharing options...
Wease Posted April 29, 2004 Report Share Posted April 29, 2004 Isn't the rule of thumb 1/8 mile time * 1.55? At least that's what I thought it was. Anyways, if that is the case, you are looking at a low - mid 12 second car... smile.gif Quote Link to comment Share on other sites More sharing options...
nurkvinny Posted April 29, 2004 Report Share Posted April 29, 2004 My 8.0x 1/8 mile = 13.5x 1/4 mile. Quote Link to comment Share on other sites More sharing options...
OneRunnin72SST Posted April 29, 2004 Report Share Posted April 29, 2004 What kind of rpms will it turn? Those 5:13's can't be good for your trap speed in a 1/4 if it won't make the power or spin the right r's. I am guessing that it might just be a car set up for 1/8 mile drags. I dunno though ~Erik Quote Link to comment Share on other sites More sharing options...
Guest stevil Posted April 29, 2004 Report Share Posted April 29, 2004 My 8.3 1/8 mile ET = 13.0 1/4 mile ET Quote Link to comment Share on other sites More sharing options...
justcause Posted April 29, 2004 Report Share Posted April 29, 2004 In the Ghia I ran 7.49 in the 1/8 and 11.64 in the 1/4 Quote Link to comment Share on other sites More sharing options...
Orion Posted April 29, 2004 Report Share Posted April 29, 2004 bench racing = not racing. take it to the track, and see how fast YOU are. *smileyface Quote Link to comment Share on other sites More sharing options...
CobraKevin Posted April 29, 2004 Report Share Posted April 29, 2004 My 7.8 1/8 was 12.0 in the 1/4. A lot depends on the trap speed in the 1/8. If you're on slicks, you could run a 7.99 at +- 85mph and run the 1/4 around 12.7. On street tires, you're more apt to turning 90mph in the 1/8, and going half a second faster in the 1/4. Quote Link to comment Share on other sites More sharing options...
Guest 3000GT Posted April 29, 2004 Report Share Posted April 29, 2004 hey thanx guys...good luck this year....i get carried away when i type.(15:13)lol...but graemlins/gives.gif good luck and thanx for replying. Quote Link to comment Share on other sites More sharing options...
gillbot Posted April 29, 2004 Report Share Posted April 29, 2004 8.2590 in the 1/8th was 12.6310 in the 1/4 with my camaro. Quote Link to comment Share on other sites More sharing options...
Dave1647545494 Posted April 29, 2004 Report Share Posted April 29, 2004 thats an eighth mile car with 5.13's its all out of revs unless the motor will do like 10,000 rpm you can run an 8.0 1/8 and run anywhere from 11.0 to 13.5 depending on how much the car picks up on the big end Quote Link to comment Share on other sites More sharing options...
Jeffrey Posted April 29, 2004 Report Share Posted April 29, 2004 A buddy of mine ran at a 1/8 mile track one night the very next night ran at a 1/4 mile. Its a 91 Eagle Talon AWD and it ran a 7.98 at the 1/8 and without changing anything ran a 12.1 the very next day, but different setups and such will provide a different outcome. Quote Link to comment Share on other sites More sharing options...
Mensan Posted April 30, 2004 Report Share Posted April 30, 2004 You need to take into consideration the weight, and the trap speed and time in the eighth. Heres the formula: (1/8 e.t.*mph)/weight-weight(5.25)+1/8e.t.(1.55)=Take it to the track. Seriously though, I posted the factors needed to convert, I just don't have the formula. It's not *that* accurate anyway. Quote Link to comment Share on other sites More sharing options...
owndjoo Posted April 30, 2004 Report Share Posted April 30, 2004 every car is different. my '95 talon ran 8.07 1/8 and 12.67 1/4. but the mph in the 1/8th was 86. although the 1/4 was only 106. but i also have awd, and the small turbo was on it, which means quicker 1/8 times but less mph and not soo much on the big end. i'll also agree that the 5:13's definitely arent usually for 1/4 mile. you should have hella 60ft's though. Quote Link to comment Share on other sites More sharing options...
OGRE Posted April 30, 2004 Report Share Posted April 30, 2004 Originally posted by Wease: Isn't the rule of thumb 1/8 mile time * 1.55? At least that's what I thought it was. Anyways, if that is the case, you are looking at a low - mid 12 second car... smile.gif it works. i've compared different cars and fidd slips and i typically falls (exept in case of driver error or a hp car with crappy launch) and it falls between * 1.52 and 1.58. 1.55 = good rule of thumb. Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted May 2, 2004 Report Share Posted May 2, 2004 My car ran an 8.13 1/8 and a 12.74 1/4. Of course the car ran like a champ top end back then Quote Link to comment Share on other sites More sharing options...
OGRE Posted May 2, 2004 Report Share Posted May 2, 2004 Originally posted by 93TANG: My car ran an 8.13 1/8 and a 12.74 1/4. Of course the car ran like a champ top end back then 12.74 / 8.13 = 1.567... works smile.gif Quote Link to comment Share on other sites More sharing options...
CobraKevin Posted May 2, 2004 Report Share Posted May 2, 2004 12.04 / 7.8 = 1.544 (03 Cobra) 14.39 / 9.2 = 1.565 (02 GT) 12.64 / 8.1 = 1.560 (01 Cobra) Pretty close. Quote Link to comment Share on other sites More sharing options...
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