Ive been puting bits on my engine for the last year or so geting it ready for a remap which i will take to reylands maybe next month, but ive just had a thought i still have standard valve spring.. My engine at the moment has a tt38, but everything else on the engine been done to make big power so i wouldnt be surprise it it knocked out 480bhp or something big on a tt38 as nothing should ristrict the performance..

so how do i stand with the standard valve spring runing a bd14 inlet and a standard exhaust cam?