I have a 24v cosworth boa which i am used for a race xr4i as of next year im going up a class and will be needing around the 400bhp mark what i am after doing is putting one larger turbo on the back, i was told that the pistons have cut out for the valves is this true? or is that on the bob as i heard this was a week spot and the pistons under forced induction melted here ?
or in the boa are the pistons the same as the 12v cologne as i have seen on of these with a whole set running 500 bhp on standard internals
and any things people know to do with these engines would be muchly appriciated