its a vspec and it has the extra shim installed that came with the motor. It is running like a dream now and was also running like a dream before the mis hap with the fuel tank. Basically the lip decided that it didn't won't to close properly some of the time. And no adjusting of the "O" ring would fix it. Replaced the lid and it was all good. But in reality our back straight is actually one of the tricker parts of the track, due to the fact its not straight and has bumps that actually aim off the track, so even if i was only going 5 or 10% faster (which i'll say might just well have been the case) it sure felt insanley fast

..but this is way off topic and sort of missed the point of what i was trying to say, so i leave it at that

[8D]