Adjustable pinion snubber & 60 ft times

[BBKNARF]

Does a adjustable pinion snubber make a difference with 60 foot times at the track, not on my car.
Made 3 passes with the snubber approx 1" away from the floor, average 60 ft. time 1.74
Adjusted the snubber so that its just kissing the floor made 3 more passes average 60 ft. time 1.71
All runs launched at same RPM and using slicks.
Seriously thinking about buying Cal Tracs.

Frank

[HPP]

If your springs are working properly, a snubber will never make contact with the floor. You can gain more by tuning leaf spring clamps than you can by installing a snubber. That is the classic mopar rise under launch that is at work.

Cal tracs biggest claim to fame is that it allows symetrical leaf spring cars, like mustang and camaro, to act like asymetrical leaf springs cars, like mopars, with a shorter more rigid front section and a softer rear section.

[Ghoste]

That would have to call for some awful damned stiff springs wouldn't it? 

[BBKNARF]

I'm using Hemi leaf springs and removed the rear clamps on the leafs, added extra clamps on the front end of the leafs for extra streath, and by adding adjustable pinion snubber
I would think it would work great on the 60 foot, but it doesn't. The purpose of a pinion snubber that is touching the floor is you do not want the rear end to twist forward to much that way the tires
will plant it self more into the pavement for better traction is this right ? But for some reason its not working on my car.

So will the cal tracs work better on my car then the snubber, I don't know, has any one else experience with cal tracs ? are they worth buying ?

[elacruze]

What's your driveline combination? What are you running for tires?

If you're not spinning, you won't improve your 60' times very much.

Conversely, if you're running too much tire you can improve your 60' by using smaller ones.

[BBKNARF]

451 cu.in. stock 727 Trans with manual valve body and it shifts hard, 8.75 rear with 4.10s, M/T slicks 26x10x15
best time so far 11.40 @ 122 mph, a number of guys at the track said the car should be going anywhere from 10.85-11.00 with that mph, they also said my 60 foot has to improve to a 1.5 or better
to achieve that time.

[elacruze]

What's the car weight, what's your converter stall? Are you spinning at all?

Does the car feel good all the way down?

[BBKNARF]

What's the car weight, what's your converter stall? Are you spinning at all?

Does the car feel good all the way down?

Weight just over 3600 with me in it, stall 3600, according from a friend a very nice wrickle on the sidewall when I launch with 14 lbs of air, and very little air between bottom of front tire and ground, and it pulls strong all the way down the 1/4, Front shocks Comp. engineer 90/10, rears Ranchos 9000 adjustable.
The car has power like I said 122 mph in the 1/4 it should do 11.00 or faster.

[firefighter3931]

What is your rpm at the stripe ? It might need more gear and definately needs more stall....at least another 1000 rpm. The MPH is good for high 10's/low 11's but it's not 60fting well. From the wrinkled sidewall description traction is not an issue at this point. 


Ron

[elacruze]

What is your rpm at the stripe ? It might need more gear and definately needs more stall....at least another 1000 rpm. The MPH is good for high 10's/low 11's but it's not 60fting well. From the wrinkled sidewall description traction is not an issue at this point. 


Ron

Simple enough-if you're hooking, you need more leverage. Gear and converter are the only two places to get it.

A car with poor rear suspension may find a considerable amount of 60ft. in the suspension, but you're already hooking good. The best you could do from there is a few hundredths by reducing wrap, which you've already found in the snubber.

[BBKNARF]

What is your rpm at the stripe ? It might need more gear and definately needs more stall....at least another 1000 rpm. The MPH is good for high 10's/low 11's but it's not 60fting well. From the wrinkled sidewall description traction is not an issue at this point.  


Ron

Shifting at 6300 and ending with 6500 at the end of track.

Wow 4600 would this stall be ok for the street 

Ok now I'm stuck in the middle I can only get 1 item for now, cal-tracs or stall converter 

Thanks guys more suggestion welcome

Frank

[firefighter3931]

Simple enough-if you're hooking, you need more leverage. Gear and converter are the only two places to get it.

Bingo ! 

What is your rpm at the stripe ? It might need more gear and definately needs more stall....at least another 1000 rpm. The MPH is good for high 10's/low 11's but it's not 60fting well. From the wrinkled sidewall description traction is not an issue at this point. 


Ron

Shifting at 6300 and ending with 6500 at the end of track.

Wow 4600 would this stall be ok for the street 

Ok now I'm stuck in the middle I can only get 1 item for now, cal-tracs or stall converter 

Thanks guys more suggestion welcome

Frank

Definately the converter ! Caltracs will only make your car more consistant if it's having traction issues...which you're not. 

Frank, my old 446 makes similar power as your 451 but it 60fted better (1.68) and mine is 500 lbs heavier. The difference ; stall speed !  The Dynamic 9.5 in mine drove like a stocker until you mashed the pedal and then it flashed up real nice....luv that converter  The converter slip is less than 3% so it's very efficient. 



Ron