Thread: sr20ve oversized valves

Hey guys im curious on building my 20v head i have seen cfm numbers on headflow charts and the guy said he used bigger than +2mm oversized valves ive looked around they only make +2mm valves is there bigger ones than that can you used oversized det valves instead with kelford 292 cams and 123lb supertech spring kit

They might have been custom valves.

Is it really worth it to have bigger than the 2mm oversized valves

The head you were talking about was for a N/A motor. He was trying to squeeze ever last bit of power he could out of it. The person who was porting the head flowed it and prob told him to upgrade to bigger valves.

I think people modify honda oversized valves up to 36mm iirc.

It is worth it if you know how to take advantage of those extra mm of valve size increase.

That maked sense thanks for the info