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first trip to the track

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Old Oct 26, 2003 | 08:55 PM
  #1  
pskel350's Avatar
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From: SW Michigan
first trip to the track

finally got a few passes in at the track, and i was kind of disapointed

i dont really know how to luanch the car yet, especially with the new 4.10 rear.

3.002 60'

1/8 10.17 @ 77.63 mph

1/4 15.1 @ 99.57

that was my fisrt time ever racing at a track, i do have a faster time slip, but i missed 4th gear twice so im not counting the run.

either i get absolutly no traction, or so much that the car bogs down terribly....

does my car have potential to hit 13's? that was my goal with this engine.

is all im lacking now a good luanch, or dont i have enough power to run 13's?
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Old Oct 26, 2003 | 09:26 PM
  #2  
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From: Buffalo, NY
Car: 1988 IROC-Z
Engine: 427 SBC
Transmission: ProBuilt 700R4
Axle/Gears: Moser 12 Bolt / 3.73 TrueTrac
Re: first trip to the track

Originally posted by pskel350

does my car have potential to hit 13's? that was my goal with this engine.


I think you do easily.
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Old Oct 26, 2003 | 09:45 PM
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From: Saskatchewan
Car: 1986 Iroc
Engine: 454 Demon 850DP
Transmission: TH350, 3500 stall
Axle/Gears: 3.73
If you can get your 60ft down to 2.0 you are almost there.
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Old Oct 26, 2003 | 10:40 PM
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From: 51°N 114°W, 3500'
Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Tranny?

4.10 gears and a 700R4 is a huge starting line ratio of 12.56. You're going to need really good traction to keep from spinning with that much torque multiplication.

I currently have 4.56 gears. When I used a TH400 my starting line ratio was only 11.30 and now that I use a powerglide it's a very slow 8.02. After a gear swap this winter it's going to be an even worse 7.56 but then I also have a lot of torque to overcome the poor starting line ratio. My last 60' times were 1.54's and I expect them to be a little slower in the spring with the new 4.30 gears.

You might just be overpowering the tires. You're going to need some slicks if you expect to hook up at all and get those 60' times down.
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Old Oct 27, 2003 | 11:19 AM
  #5  
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From: Rochester Hills, MI
Car: '91 Firebird
Engine: 408 SBC
Transmission: T5
Re: first trip to the track

Originally posted by pskel350
3.002 60'

1/8 10.17 @ 77.63 mph

1/4 15.1 @ 99.57

does my car have potential to hit 13's? that was my goal with this engine.

is all im lacking now a good luanch, or dont i have enough power to run 13's?
Yes, your trap speed, being almost 100 MPH, shows that your engine is putting out sufficient power to break into the 13's (mid thirteens aren't out of the question). But 3 second 60ft times??? You definately need help in the traction department. I hate to tell you, but 4.10 gears are a bit much for your setup. You would benefit by swapping to something in the 3.5:1 ballpark. In any event, you might want to invest in some aftermarket suspension components (rear trailing arms, torque arm, etc.). Also, get yourself some drag radials.

Out of curiousity, what track did you take it too?
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Old Oct 27, 2003 | 02:46 PM
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From: SW Michigan
i have a T5...i just switched out my 3.42 for the 4.10, which made the car stay in the power band a ton better....

i think i am going to try using some DR's next time i go. i tried a set of slicks, but since i didnt want to break the T5, i didnt launch very hard at all and the car bogged down badly. i got a 2.4 60' with that run, but then missed 4th gear (not once, but twice ) and ran a 14.6 at 92 mph.

how much will a torque arm increase traction? thats about all that i am lacking for suspension mods.

i ran the car at Stanton, for the M8 event.
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Old Oct 27, 2003 | 02:50 PM
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Car: 1989 Iroc Z L98
lol that is one of the worst 60 foot times i have ever seen. Get some drag radials...
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Old Oct 28, 2003 | 07:59 AM
  #8  
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From: Rochester Hills, MI
Car: '91 Firebird
Engine: 408 SBC
Transmission: T5
Originally posted by pskel350
i have a T5...i just switched out my 3.42 for the 4.10, which made the car stay in the power band a ton better....
Oops, I didn't notice that in your original post. The 5-speed would warrant taller gears. I don't have any before/after times using an aftermarket torque arm - don't know how much of a difference one would make in your case. Sounds like practice will lower your times substantially.
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Old Oct 28, 2003 | 11:46 AM
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From: Medford, Oregon
Car: 1989 Iroc Z L98
Tires will lower your times more than suspension upgrades will at this point. I would be careful how well you get it hooking up with a t-5 though.
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Old Oct 28, 2003 | 01:41 PM
  #10  
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From: SW Michigan
Originally posted by unknown_host
Tires will lower your times more than suspension upgrades will at this point. I would be careful how well you get it hooking up with a t-5 though.
i know, even though the T5 was just re-built about 4500 miles ago, i was still afraid of breaking it with the slicks. i think i might try my 16 inch DR's next time.
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