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Originally posted by Mike Rietow:
You need a two way adjuster on the compression side of the damper/shock with as much down pinion angle as you can get away with and low tire pressures for wheel speed. Run the high speed stiff and low looser/normal so it's not like being on a pogo stick / bumpy tracks, as the rear end slows down.

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Originally posted by Bucky:

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Originally posted by Mike Rietow:
You need a two way adjuster on the compression side of the damper/shock with as much down pinion angle as you can get away with and low tire pressures for wheel speed. Run the high speed stiff and low looser/normal so it's not like being on a pogo stick / bumpy tracks, as the rear end slows down.

What's the theory with misaligning the driveshaft?

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Originally posted by Mike Rietow:

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Originally posted by TOP38:

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Originally posted by Mike Rietow:

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Originally posted by TOP38:

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Originally posted by rradracer:
I had same issues this year 1.00 60ft 4.32 with tire shake starting around .15 into the run. my fix was 6 lbs air and tighten the compression on shocks

At .150 into the run is quick different that 0.9 plus or minus! Rear end is not moving at .9 out and the car should be up on the tire well before this point so shock settings won't fix this, air pressure may have some impact but I wouldn't bet on it.

In all due respect, You're looking at it from an aspect of an adequate damping system, when the cause of the shake is the result of a inadequate damping system, resulted by an out of phase imbalance between the two tires ,,,, tire shake. This is an objective fact anywhere the shake occurs early in the run.

A guess a shock travel sensor would answer the question..............

No sir, it's an objective fact shake is an out of phase imbalance between the two tires resulting in inadequate damping, high damper shaft speeds of 20-30 inches per second during shake, so we know the rear end is moving un-dampened/uncontrolled. This is an objective fact anywhere the shake occurs early in the run. .

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Originally posted by TOP38:

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Originally posted by Mike Rietow:

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Originally posted by TOP38:

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Originally posted by Mike Rietow:

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Originally posted by TOP38:

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Originally posted by rradracer:
I had same issues this year 1.00 60ft 4.32 with tire shake starting around .15 into the run. my fix was 6 lbs air and tighten the compression on shocks

At .150 into the run is quick different that 0.9 plus or minus! Rear end is not moving at .9 out and the car should be up on the tire well before this point so shock settings won't fix this, air pressure may have some impact but I wouldn't bet on it.

In all due respect, You're looking at it from an aspect of an adequate damping system, when the cause of the shake is the result of a inadequate damping system, resulted by an out of phase imbalance between the two tires ,,,, tire shake. This is an objective fact anywhere the shake occurs early in the run.

A guess a shock travel sensor would answer the question..............

No sir, it's an objective fact shake is an out of phase imbalance between the two tires resulting in inadequate damping, high damper shaft speeds of 20-30 inches per second during shake, so we know the rear end is moving un-dampened/uncontrolled. This is an objective fact anywhere the shake occurs early in the run. .

Mike

Shake and chatter are two different animals. Once a car goes into real tire shake, all bets are off and the only option is to lift and try again. So under real tire shake, the kind that breaks chassis, I could believe your 10 to 20 IPS shock speeds.

But in this case, there is no way shock speeds are even close to 10 never mind 20 IPS. Not to mention that a car with this kind of power should even be able to "Shake" the tires,,, unless they try too with a crazy setup. Promod power levels can and do drive into tire shake this far out but not these deals. And yes, this is my opinion just like yours.

The track conditions where not good on the run shown, even the 1-2 gear shift upset the tires.

Based on the data presented and info listed here so far, I can tell you one thing for sure! There are way more questions than answers at this point!

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What about mono shock cars with stiff antiroll bars? A shock can't distinguish one tire from the other in that case.

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I think we could all agree that the shock is at least one part of the equation, but certainly not the only part.

www.dragraceresults.com

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Originally posted by DragRaceResults:
I hope he will get on here and get us an updated. He won the $5k Shootout at the ACE Ohio event this weekend. I'd say the car must at least be better.