I tried it (3b's all round) and found that the rear had too much pack and changing down 5wt in oil made little difference to static (low speed) or high speed damping. I came to the conclusion that, American tracks are smooth and have lots of LARGE jumps 10ft + gaps so they don't require the softer damping else they would slap down the back of the car on every jump which would be slower lap times wise for sure. British tracks on the other hand tend to be rough dirt under the grass and when the grass is gone get very rutty, also Brit tracks tend to be Jump shy if you know what i mean. I have now drilled my rear 3b pistons to 55 swg and left the front 3b's 'as is' equivelant to 56 swg and the car was alot better, in losi language that would be Red fronts and Orange rears. HTH you Roger.
Regards SimonW
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