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Author Topic:   Try to lower 60' times.

Posts: 346
From: Toronto,Ontario,Canada
Registered: Aug 2000

posted 05-14-2001 08:10 AM     Click Here to See the Profile for 70coupe     Edit/Delete Message   Reply w/Quote
I have a 351c-4v closed chamber 70 mustang coupe and I'm trying to lower my 60' times.
The gears are 4:11's and its a stock set up with traction bars. How close should the snubber on the traction bar be to the leaf sping? I know the large ports hurt low end torque but what can I do?

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Posts: 1511
From: Spencer, WV
Registered: Jan 2001

posted 05-14-2001 09:05 AM     Click Here to See the Profile for n2oMike   Click Here to Email n2oMike     Edit/Delete Message   Reply w/Quote
If it's not spinning, playing with the slapper bars isn't going to make the car launch any harder... what you need is a looser converter and/or a smaller cam (if yours is too big)

As for the slapper bars...
The snubber should be fairy close to the spring (preferable the eye). Having the passenger side a little closer than the driver side is good. I like for the passenger side to have almost no clearance, and the driver's side to have around 1/4" or so. If they are type that mount to the housing with the U-bolts, the only ways to adjust them are by the use of wedge shaped shims where they mount and/or taller/shorter snubbers. Do NOT try and draw them up to the spring with a clamp. That does not work, and just puts things in a bind.

ps, my car once cut a 1.43 60ft with 28x9 slicks and slapper bars. However, that was not the norm. The track was VERY sticky that day! Nitrous REALLY helps out the 60ft time.

Great launches for your car are only a set of slicks and a nitrous kit away. Yee-Hawww!

Good Luck!

Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3

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Posts: 346
From: Toronto,Ontario,Canada
Registered: Aug 2000

posted 05-14-2001 09:15 AM     Click Here to See the Profile for 70coupe     Edit/Delete Message   Reply w/Quote
Thanks, I'll get larger snubbers, the ones I have on their now are about 1.5"'s from the spring also I think I'll put a line on my tire and have someone look to see if I'm spinning.

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Posts: 19686
From: Lyons, IL, USA
Registered: May 99

posted 05-14-2001 06:03 PM     Click Here to See the Profile for Moneymaker   Click Here to Email Moneymaker     Edit/Delete Message   Reply w/Quote
If it's an automatic you want the snubber 3/4 of an inch from the spring eye (or as close as you can get it to the eye) on the right and 1/2 away on the left. Stick shift cars you want about 1/8th on both sides. You MUST make your adjustments on flat level ground with the car's driver seated in position. Years and years of slapper bar science has taught me that this works the best. (See photo on Fox Forum) Tony's car this past weekend 1.611 to 1.619 60 foot times with 7.90 1/8th mile ET's. This is at 3325 lbs.

Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link

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