Hey peeps, ive got a silvertop zetec turbo lump. Its a standard head but im looking at getting it ported and polished.


My question is, why im at it would i benefit fitting larger valves at the same time? It will cost me an extra £250 on top. Would it be £250 well spent?

 

Nope i wouldnt bother. Ive got a heavily ported black top head and it pushes through 450bhp no problem and am looking to get over 500bhp from it and it should quite happily do it.