Originally Posted by
zetaboostboy522bhp
valve springs are to stop valve float under boost , you can run around 5 psi on standard springs and you should see 200+ bhp at that boost
cheers paul
yeah i guess i could fit the springs but i honestly wouldnt want something unreliable as hell by running mega boost and power, id be more than happy with a turbo'd 2 litre zetec with 200bhp