jazza, What restrictor are you using?
I use both restrictors but the engine seems to work nicer with the 8mm for my applications. I can make 10 minutes with either though.
This is GT racing I'm talking about with 150ml tanks.
and what clutch setting? on the soft or hard side?
Hard side man, extra hard springs. We actually race with foam tires on our GT's here in Australia.
They are 100mm ATS champ foams, very very nice, you get great wear & grip.
Cheers Daz