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mad dog trap speed with lame ET

Old 08-16-2001, 05:47 PM
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mad dog trap speed with lame ET

Im getting really pissed at these drag radials....Ive tried 18,15, and 12 psi with all types of burnouts with no success. My best sixty foot last night was a 2.1X on a 12.6 pass at 115 MPH. Do I need one of those torque arms with the adjustable pinion angles or what?! On the 12.6 pass I didnt even spray it until middle of second gear. How Quick can go if I hook?....any Ideas

------------------
91 RS W/carbed 350, Vortec heads, performer rpm, Comp cams Xtreme energy 224/230 duration and .477/.480 lift. BFG Drag radials. 3.42 posi,Corvette servoed 700r4, 3000rpm stall converter. Edelbrock TES, 3inch cat, flowmaster with single 2.5 inch exit.
Best time yet to come
13.0 @ 107- N/A
yet to come- Nitrous

This is a Pic of my car in race trim www.tbns.net/billyjay/camero.jpg

Yes I know how to spell camaro- so dont ask. I didnt make the link
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Old 08-16-2001, 05:54 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Adjustable torque arm to change the pinion angle, aftermarket LCA and relocation brackets and if you don't already have them, subframe connectors.

Your mph is good for low 12's or high 11's but your 2.1 sixty foot times are hurting. With a 3000 stall converter you should be doing better than that. It could be that the low first gear in the 700R4 is overpowering the tires and causing them to spin.

Since going lower in tire pressure didn't help, go up. A radial, even a drag radial has too stiff of a sidewall to go below 18 psi. From what I've seen they work best no lower than 20 psi.

Leave the drag radials for people who have to race on a DOT tire and buy real slicks for the track.

------------------
Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.89
Best MPH on a time slip: 121.52 altitude corrected to 125.89
Altitude corrected rear wheel HP: 497.9
Best 60 foot: 1.546

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car, 91 454SS daily driver, 95 Homebuilt Harley

[This message has been edited by Stephen 87 IROC (edited August 16, 2001).]
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Old 08-16-2001, 07:08 PM
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As a side note, that 700R4 isn't going to last but a couple months in your car. They're hardly reliable at 400 Hp and torque absolutely trashes them. A shot of nitrous generates a lot of torque. Might start thinking of alternatives.
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Old 08-17-2001, 01:15 PM
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Too true. I'm surprised a stock tranny has lasted this long!! That's good solid GM over-engineering right there.
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Old 08-17-2001, 04:52 PM
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Car: '98 Z
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If I go with the adjustable torque arm, I have to get one that is specific to the trans dont I? And if I thrash the 700R4 AGAIN then will that new torque arm work with a 400? The only think keeping me from a TH400 right now is the 300 dollar torque converter I have that I can only use in the 700. Do I have to worry about twisting the unibody if I launch and hook on the nitrous without subframes--the car makes a little over 500 ft-lbs on the bottle.. thanks for the help guys
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Old 08-17-2001, 11:26 PM
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It could be the track though. Have you tried going to a different track. I was having the same problem there for a while and the best 60's I could squeeze out were mid 1.9's to 2.0's at my local track. This was leaving at idle too! I went to a different track just a couple of weeks ago and this place is well known for hooking. First pass out 1.84 60'. Easy launch rolling out the hole followed by WOT punch. She hooked perfectly and chirped second. Never has the car done that. I was pysched! I ran a few more times and pulled off a 1.80 60' followed by my best time of 12.47. I was very happy. BTW, my car has a 5speed.

I have a Random Technology adjustable torque arm sitting in my garage....I may not even install it for a while since I know the car will hook. If you can't seem to hook at any track, get an adjustable torque arm and some squat brackets. Set your pinion angle to about 4degrees. These mods should help a bunch. Also, as Stephen mentioned, I wouldn't go below 18psi on the DR's either. I found mine to work best at 20psi(Nitto 275/40). Also, no need for long burnouts with DR's either....just a few seconds until you see smoke then roll forward. Good luck!

Oh, here is a pic of my 1.80 60' footer a couple weeks ago!!


------------------
David Tuschhoff
1991 RS/Z28 Camaro
Fuel injected 355ci V8.
12.47 @ 110.7mph 1.80 60'
Best mph of 111.6.
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Old 08-20-2001, 12:32 AM
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*** I wish I could hook like that....nice car and times, thanks for the advice

Nick
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Old 08-23-2001, 08:27 PM
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What track are you running at? If you switch to a 400 I'm willing to help with the 700 TQ converter.
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Old 08-24-2001, 12:41 AM
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union grove....Im not really sure what Im gonna do, if anything to the trans. But if you hang around Ill keep ya posted.
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