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Old Sep 26, 2007 | 03:21 PM
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Default 60 foot times

My 60 foot times are around 2.2 is there anyway to increase it short of drag radials or major suspension mods? Granted it is on non treated asphalt would being at the drag strip on a treated surface help that alot? All I get is waster power in the form of melted rubber and sideways action when i launch hard.

Last edited by JustinD; Sep 26, 2007 at 03:24 PM.
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Old Sep 26, 2007 | 03:30 PM
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Originally Posted by JustinD
My 60 foot times are around 2.2 is there anyway to increase it short of drag radials or major suspension mods? Granted it is on non treated asphalt would being at the drag strip on a treated surface help that alot? All I get is waster power in the form of melted rubber and sideways action when i launch hard.
Unless you put sticky tires, 2.2 is about as good as 60' times get on regular asphalt... I've seen 60' times as fast as 1.70's on street tires (not myself but other people) at the track which is prepped with VHT..
It depends on the track IF and how much VHT they apply to the track.
The tracks that I'm racing at usually prep the track very well... My personal best 60' time on 255/60R15 tires was 1.836 at the Bradenton track.. However, some tracks don't prep the track for regular testing...
Usually, taller tires have better traction than not so tall tires (sidewall height).

Last edited by GrandSportC3; Sep 26, 2007 at 03:33 PM.
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Old Sep 26, 2007 | 03:33 PM
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Hum, so since I won't be going to the track often it might be in my best interest to stick with street tires. a pair of drag radials and rims would be spendy and since it is not a regular thing lets just hope they prep the track well.
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Old Sep 26, 2007 | 03:36 PM
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Originally Posted by JustinD
Hum, so since I won't be going to the track often it might be in my best interest to stick with street tires. a pair of drag radials and rims would be spendy and since it is not a regular thing lets just hope they prep the track well.
Is your car a 4-speed or auto? With the automatic, you should be able to get good traction on a well prepped track.. With stick shift, you will have to slip the clutch.. You also have to drop the tire pressure.. I ran about 24 lbs of pressure in my 255/60R15 BFG Radial TA's when I had my 1.836 60' time.. I had a few more 60' times in the 1.80's...

Just checked your profile and it says TH350.. You should be able to get a dead hook on a well prepped track, unless your rear spring is too soft and your rear bottoms out against the bump stops... A tighter rear spring will help in that case..
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Old Sep 26, 2007 | 04:22 PM
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The spring is not really saggy I have new nitrogen shocks. I have a 3000 stall converter so I might not get as good of traction as you are thinking.
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Old Sep 26, 2007 | 06:50 PM
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Originally Posted by GrandSportC3
Is your car a 4-speed or auto? With the automatic, you should be able to get good traction on a well prepped track.. With stick shift, you will have to slip the clutch.. You also have to drop the tire pressure.. I ran about 24 lbs of pressure in my 255/60R15 BFG Radial TA's when I had my 1.836 60' time.. I had a few more 60' times in the 1.80's...

Just checked your profile and it says TH350.. You should be able to get a dead hook on a well prepped track, unless your rear spring is too soft and your rear bottoms out against the bump stops... A tighter rear spring will help in that case..
24 psi seems to be a magic tire pressure for street tires. A couple of weeks ago, I was pulling off consistent 1.8 and 1.9 second 60' times and a best of 1.75 sec. on a well-prepped track with my 255/45R17 Kumho Ecsta's with 24psi in the rear tires. I was launching @ 2300rpm by removing my foot from the brake and rolling into the throttle with my TH350 and Holeshot 3000. A bit too much power and Poof! tire smoke.

I still don't have the 'feel' to do it consistently and cut good lights though. Practice, practice practice.
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Old Sep 26, 2007 | 07:43 PM
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Originally Posted by vettenoir
24 psi seems to be a magic tire pressure for street tires. A couple of weeks ago, I was pulling off consistent 1.8 and 1.9 second 60' times and a best of 1.75 sec. on a well-prepped track with my 255/45R17 Kumho Ecsta's with 24psi in the rear tires. I was launching @ 2300rpm by removing my foot from the brake and rolling into the throttle with my TH350 and Holeshot 3000. A bit too much power and Poof! tire smoke.

I still don't have the 'feel' to do it consistently and cut good lights though. Practice, practice practice.
What are you running for horsepower?
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Old Sep 26, 2007 | 09:21 PM
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A gear change is is whats important in 60 foot times. Your wasting HP with 3 series gears. One cannot have it both ways. Either the Autobahn or the drag strip. ...
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Old Sep 26, 2007 | 09:44 PM
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Originally Posted by Ironcross
A gear change is is whats important in 60 foot times. Your wasting HP with 3 series gears. One cannot have it both ways. Either the Autobahn or the drag strip. ...
Who are you talking about? I have 4.10's.
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Old Sep 26, 2007 | 09:56 PM
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Originally Posted by JustinD
Who are you talking about? I have 4.10's.
How much stall speed on the converter? The converter is critical for good 60' times.. For sub 1.90 60' times, you definetely need 3000+ RPM stall speed.. Ideally, a 3500 converter is a good compromise for performance and streetability... Modern 3500+ converters are just as streetable as regular street converters..
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Old Sep 26, 2007 | 10:03 PM
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It is right around 3000 with the brake down hard to hold it from lurching or spinning.
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Old Sep 26, 2007 | 10:36 PM
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It is to the point where if I hit it and flash the converter it will bounce off the 6k rpm rev limiter. All I get for a 0-60 with that is high 5's.
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Old Sep 26, 2007 | 11:19 PM
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Originally Posted by JustinD
Who are you talking about? I have 4.10's.
'Then you probably need more HP and a set of slicks'.



460 HP, 454, LS7
4.56 gear
3500 converter
9 inch slicks

The above gets me 1.5-1.6, 60 ft. times. Those 10`ths are hard to come by too.
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Old Sep 26, 2007 | 11:58 PM
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Originally Posted by JustinD
What are you running for horsepower?
See my signature below...

Bob
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Old Sep 26, 2007 | 11:59 PM
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Originally Posted by vettenoir
24 psi seems to be a magic tire pressure for street tires. A couple of weeks ago, I was pulling off consistent 1.8 and 1.9 second 60' times and a best of 1.75 sec. on a well-prepped track with my 255/45R17 Kumho Ecsta's with 24psi in the rear tires. I was launching @ 2300rpm by removing my foot from the brake and rolling into the throttle with my TH350 and Holeshot 3000.
Really! Your motor power does not over come your rear brakes and start spinning your rear tires? If I get much over 1600 rpm the rear tires start smoking no mater how hard i have the brake petal pushed and the front tires even though locked get pushed forward, activating a red light

Before I installed a line lock that is how I would do the water burn out. stomp on the brake and floor it in the water box. Once the rears starting going let off the brake and run the speedo up to about 80 mph in second gear and then let off and roll up to the staging lights
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Old Sep 27, 2007 | 12:15 AM
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I'm not sure if that is what he means. Anyone can do a brake stand.
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Old Sep 27, 2007 | 01:16 AM
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May as well buy at least a set of drag radials, because no matter what
the time slip says after you get the first one you will be addicted
to I must run quicker. Keep the diameter down or you will
start turning your 4.10s into 3.70s. Just a cheap set of used rims
and new traction makers.
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Old Sep 27, 2007 | 01:27 AM
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Some nitto 555's or what?
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Old Sep 27, 2007 | 03:31 AM
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I have no clue who has the best drag radial, But I'm guessing you
have around a 26 to 26 1/2 Dia. tire, if you throw a 28/29 Dia tire on it
you will drop your gearing lower you can't afford to do that, try to
keep the dia. close to what you have now. When I was 17 decided
a set of JC penny mags would look good, bought 7 inch wide for the front
with the stock E70, 27 inch dia tire, in the back went to 8 inch and
J60 may have been J70 ( to many yrs ago ) they were 29 inch Dia.
The minute I let the clutch out on that 302, .050, 254 cam, 2.20 low
3.73 car, I found out the hard way what 2 inches dia. in tire can do to
gearing.

Last edited by Little Mouse; Sep 27, 2007 at 03:46 AM.
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Old Sep 27, 2007 | 09:15 AM
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Originally Posted by JustinD
My 60 foot times are around 2.2 is there anyway to increase it short of drag radials or major suspension mods? Granted it is on non treated asphalt would being at the drag strip on a treated surface help that alot? All I get is waster power in the form of melted rubber and sideways action when i launch hard.
The best traction in street tires can't be obtained with cheap high mileage tires. So you can just forget about using 15 rears. The switch to 11 inch rear rims with 285/40/17's AA traction A temp Z-rated were some of the first street tires that really could bight.



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