Cobra Vibration Problem

[ERA Chas]

Originally Posted by Cobra #3170

I am going to take my sun stretched Goodyears to have them rebalanced today and re-phase the left half shaft to match the right half shaft.

Bruce-please try to have them shaved to true the runout-it's not helping.
Your plan and thoroughness is great. I appreciate your taking time to post results. It's invaluable coming from guys like you that are pushing the car's performance envelope and very educational for us slackers. Morris' build and testing was of very similar benefit-but you're doing it with an original. If that's a limiting factor of your car's performance, it hasn't shown it yet. Great accomplishments from both of you. It's what I come here for.
Thanks from me.

[Cobra #3170]

Originally Posted by ERA Chas

Bruce-please try to have them shaved to true the runout-it's not helping.
Your plan and thoroughness is great. I appreciate your taking time to post results. It's invaluable coming from guys like you that are pushing the car's performance envelope and very educational for us slackers. Morris' build and testing was of very similar benefit-but you're doing it with an original. If that's a limiting factor of your car's performance, it hasn't shown it yet. Great accomplishments from both of you. It's what I come here for.
Thanks from me.

Chas, I wish I could but the run out exceeds tread depth.

I took the tires in today and had them balanced on a recently calibrated Hunter.
left rear was 2.75 OZ off, Right rear was, 2.5 OZ off, RF was 1.5 OZ off and LF was 1.0 OZ off, so much for having them balanced at the track race shop.

Perhaps the imbalance coupled with the large torque load was enough to cause a stick slip in the tire and the resulting vibration, I hope so. At least something was wrong, I feel a little better about it now.

[ERA Chas]

Originally Posted by Cobra #3170

Chas, I wish I could but the run out exceeds tread depth.

Yikes-didn't realize that! Damn G'year-if the Japanese, Brits, French, Germans and Italians can get them better than that, why can't they??For sure that's a major contributor to vibration.
But I don't think it knocked the zerk off...
P.S. If you don't mind-exactly how much power and torque does the motor make?