Originally Posted by
Rob_DOHC
Shit me thats laggy! i nearly bought a .48 t3 recently for mine.... glad i didn't lol Karl the honest answer is that i don't know. However..... There is a certain amount of gas in each cylinder, this will be the same regardless of exhaust port size, the same amount of gas will be pushed out through the exhaust port regardless.... so i don't think it will help, i know porting the exhaust in reality DOES help however i think on this occasion porting of the inlet would have a larger effect on turbo spall..... but i stand to be corrected.
The more air you can get into each cylinder (off boost) the better, i know that porting the inlet (on a restrictive head) has a larger effect on VE than porting the exhaust. So aside from this a smoother cam lol..... although its probably pretty smooth any way (like round) being a kent lol
Simple answer is port both lol
Rob,
mate think of it this way .. you have a turbo forcing the air into the head on the inlet side but all you have to push it out on the exhaust side is the piston there is big gains to be had by porting the exh side imo.
p-s on a n/a head the exh side should flow about 70% of the inlet side but on a turbo engine you want the exh side to flow 90% min of the inlet side and none of the standard cvh heas do .