Originally Posted by
pdfbt40
Seems you've never heard of the term 'porting'. The removal of material to improve flow using a die grinder, dremel, etc. Many people have found it extremely easy to do that to plastic composite as well as aluminium manifolds/heads. So no problem with a 65mm billet TB. What would you have done if the ST170 TB did have the same bolt pattern, just leave a step?
Your confident a ST170 manifold flows better, huh. But you've not actually tested it or it seems, even read the few books reporting tests. Sounds like a bookies dream.
Rather than start a new thread with your NEW question, you decided to make an incomplete post in one 2 years old.
You then started discussing a 2.0 Focus Ghia (Blacktop), now your talking about a silvertop. As I said, I've had quite a few different engines, heads and manifolds through my workshop and I document them all for future reference. I'm reasonably confident I know their dimensions and porting that works. So since you know your right (using guesswork), please carry on, I wish you luck.
Martin
mate i dunno what your issue is but its as if you think im stupid or something.
the tube of the black top zetec inlet manifold is the size of the throttle body, it cannot be altered because there is no material to remove, it would just grind right through it!
the difference in size is 15mm iirc.
as for talking about different engines, i have a 2.0l black top focus, a 2.0l silvertop mk4 escort and a 1.8 silvertop escort mk6 and a spare 2.0l silvertop engine and two st170 setups including individual throttle bodies, so i have a few options lol.
anyways i need to know if a st170 inlet will fit a silvertop as i believe that it will inprove the bhp purely because it will allow a larger t/b and more air flow.