Originally Posted by
Red_bull
I think you got it wrong on this one mate...
The gasses won't be exiting at the same rate, because of a eventually restriction in flow. If the exhaust port is extreme small this will cause a powerdrop ofcourse, but also the pressure in the cylinder on TDC will be higher then with a right ported head.
I think your forgetting the pressure on TDC.. The pressure on the time isn't always atmosferic. If it flows good you will have a under pressure which causes a higher velocity of gasses entering --> Helping your turbo to spool.
Also a under pressure wil be caused by a high exiting velocity of the exhaustgasses. Also high velocity will make sure the gasses have a high energy when hitting the turbo --> Less lag?
Bit different from the story so far, so i'm really curious to your reactions. I'm i right or am i missing somthing
Thats cool mate, and i agree with you on some points, however the cvh does not have tiny exhaust ports, as crazy cage said, looking at them you can see areas where they could be improved, but they are no pee shooters lol.
Karlos, i will take a photo of the standard ports today, where the inlets look totally different to yours, the exhaust ports don't look too different, yours have been opened up and slightly reshaped but not by a huge amount.
you will have a under pressure which causes a higher velocity of gasses entering
Thats cool, some people refer to it as the extractor effect, where exhaust gasses are 'sucked' out and the vacuum created causes fresh mixture to be pulled in. However this phenomenon only really occurs at higher rpm and when you have cam overlap which most rst cams don't have, the cvh36 might!?!? the t285t2 does etc. However, with forced induction this all becomes a lot less relevant.
Good old topic this actually karlos.... But i think you already have your answer mate.
Yes, porting will reduce lag (non of us disagree on this lol) port the inlet and the exhaust side....