Best PSI for drag radials and launch RPM
06-18-2010, 03:27 AM
#1
Best PSI for drag radials and launch RPM i go to the track today and just picked up my first set of drag radials. i need to know the best psi to run them at on the track. i have stock 10 bolt with 3.42 gears and a six speed. i would like my rear end to live through the night, but would like some good times. what is the best launch RPM @ what psi for 275/40 17 drag radials?
06-18-2010, 05:31 PM
#5
Start with around 22 and go down from there, and like (blk/slvr02ss) hope your rearend holds up if you feel any wheel hopping let out . . I usually run around 20psi on my car and yes you can run on the street with that air in them just dont forget to put more back in later.
Good luck at the track
Good luck at the track
06-18-2010, 11:36 PM
#7
Cars are different, combos are different, tracks are different.
Ive found its best to start at about 20 psi and slowly work your way down, id say no lower than 16-17psi. Try launching there, if it spins, lower rpm, if the motor boggs then launch higher.
Ive found its best to start at about 20 psi and slowly work your way down, id say no lower than 16-17psi. Try launching there, if it spins, lower rpm, if the motor boggs then launch higher.
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06-19-2010, 03:26 AM
#9
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i dont think high 7s are something to think about with stock gear and no real power adder. when i went 8.4 @ 83 in the 1/8th i went 12.7, but i only had headers and nitto dr.s
like the other thread you need to get your 60s down and thatll make a ton of difference. I ran my nittos @ 18lbs and came out around 3500RPM and worked like a charm with stock suspension. My mickeys i ran down to 16
06-19-2010, 01:45 PM
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Remember if you start going hard after better 60 foots, eventually you'll find the weak link in your drivetrain (rear end usually takes the cake here). Try working in small steps and you'll get the big picture on what works and what doesn't. Learning while you get to make the runs is a cool thing!
Derek
06-19-2010, 04:33 PM
#11
Great response here!
Remember if you start going hard after better 60 foots, eventually you'll find the weak link in your drivetrain (rear end usually takes the cake here). Try working in small steps and you'll get the big picture on what works and what doesn't. Learning while you get to make the runs is a cool thing!
Derek
Remember if you start going hard after better 60 foots, eventually you'll find the weak link in your drivetrain (rear end usually takes the cake here). Try working in small steps and you'll get the big picture on what works and what doesn't. Learning while you get to make the runs is a cool thing!
Derek
06-19-2010, 04:57 PM
#13
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Here's my 2 cents.
I run 24 psi. Best for me due to my concern for all the tail wiggle going down the track with less psi. I've run as low at 19, did my 4 second burnout give or take and my 60 wasn't any better. However the INSTABILITY above 80 mph was so bad I almost let out. Then comparing slips my Trap speed suffered.
Like others mentioned though, do some experimenting at different psi and different RPM launches.
You are going for fun right, not looking for any new personal bests?
I run 24 psi. Best for me due to my concern for all the tail wiggle going down the track with less psi. I've run as low at 19, did my 4 second burnout give or take and my 60 wasn't any better. However the INSTABILITY above 80 mph was so bad I almost let out. Then comparing slips my Trap speed suffered.
Like others mentioned though, do some experimenting at different psi and different RPM launches.
You are going for fun right, not looking for any new personal bests?
06-20-2010, 09:01 PM
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youd dont need lcas and relo brackets to get a stock suspension stock motor car to launch....
06-21-2010, 05:55 AM
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i was going mid 1.7 60s on stock rear end with stock suspension on nittos with his power level and went into the high 1.5 low 1.6 with mickey radials and my cam on stock 70K mile suspension....id say that was launching pretty ****** well
Last edited by SS4Luck; 06-21-2010 at 06:06 AM.
06-21-2010, 05:57 AM
#19
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at the risk of really throwing **** on this fire,
allbaugh, please for the love of christ tell me you have exp launching an M6 car... cuz i jsut looked at your fquick and your car is a ****** auto... please please please say you have seat time, serious seat time, at a drag stick in a stick car...
allbaugh, please for the love of christ tell me you have exp launching an M6 car... cuz i jsut looked at your fquick and your car is a ****** auto... please please please say you have seat time, serious seat time, at a drag stick in a stick car...
