Cobra Vibration Problem

[Cobra #3170]

Originally Posted by Richard Hudgins

This may be the car you are speaking of:

American Mk1. Circa 1971 Pranged at Donnybrook and not raced again to my knowledge.



I had a 712 and a 722.

On the 712 even with the underpowered Lotus twin cam (relative to the F2 engines), the joints were good for a weekend. (The twin cam was built by Gus Hutchinson which made it a very good twin cam compared to the English built units.)

The 722's inboard brakes used to cook the CV boots and joints so they would fail in 2 weekends.

Quite expensive cars to run both in dollars and preparation time in any case.

But great sport to drive.

I lied, I had a March 712 formerly Carlos Pace F2 car I was thinking F2 when I said 722. I had a Vagley tuned lotus and then a Grimaldi built injected big valve Hart copy. When they allowed BDA's I dropped out because I could not afford to buy all new engine stuff then, good old SCCA strikes again. Later on I had a March 78B that I ran for 1 season, at that point finances could not support an Atlantic car anymore. 722 were stones down the straight because they were so wide, the 712's used to eat tub rivets especially at the rear bulk head but they handled well. My car had floating front rotors which was pretty neat in 1971,the brakes were fabulous, you could go in deeper than just about any car out there lap after lap.