60ft issues
 

The car is a 1967 elcamino with a small block that makes 690hp. The tranny is a g-force 4speed with 4.88 rear end gear. The car has stock suspension with chris alston upper and lower bars in the factory brackets it also has 9inch bias ply slicks. The rear shocks are avo's and they are three clicks from full soft, the front are set at 90/10. The 60ft average is 1.50 with launch rpm at 5000 and the average e.t. is between 10.30 and 10.40 depending on the weather By raising launch rpm to 6000 the 60 ft is the same tire pressure is set at 10 pounds. We are trying to get the car to 60ft in the 1.30 range. Any help would be greatly appreciated.
thanks C.P.

Re: 60ft issues
 

What clutch ? We run similar stuff , Mcleod 10.5 sintered iron single disc adjustable clutch, the more we loosen the clutch the better the 60'. ---Trevor

Re: 60ft issues
 

If you can get a bigger tire under there it would help to!!

Re: 60ft issues
 

What's the MPH?

Re: 60ft issues
 

The mph 129-130. and it has the ram 10.5 sintered iron single disc adjustable clutch.

Re: 60ft issues
 

I would suggest it appears you lost a lot of HP between the dyno and the track. ;(

Re: 60ft issues
 

Exactly my thoughts. How much weight are you hauling?

Re: 60ft issues
 

The car weighs 3500 pounds and RWR power .All steel.

Re: 60ft issues
 

Cam Cam our best 60' is 1.42 10.9 @ 120. 3150# with a little weight in the rear bumper. 5.86 [ was about the same with 5.57 ] 3.2 1st in transmission .84 Trans Am body probably worth a little MPH. We also have AVO shocks about the same settings. MT 29.5 9 slicks 12 lbs. warm . Lighter springs in the pp really helped---Trevor

Re: 60ft issues
 

If the dyno is correct, 690 HP would be around 135 MPH. That's 5-6 more than you are showing. Fixing the clutch or traction issues isn't going to bring the MPH up much, if any. So the bottom line is, something is amiss in the HP department of the vehicle. That could is typically ignition or fuel issues. As an example, you will feed plenty of fuel to the engine while it is on the dyno because there's nothing to cause problems. But if the fuel system is not able to keep up with the engine while under a heavier load, or the system can't push enough fuel through the system, then your HP will be cut drastically. And in your case, I see 75+ missing. That's significant.
My suggestion is to find the missing HP which will cure the low MPH issue. Then you can work on the rest of the car.