Interesting Xsi 1.6 Tu Article On Guy Corfts Site

[christopher 5 1 Cars]

There are some comparative flow results of the 1.6 XSI head and the 205 Rallye on the same flow bench which is nice to see

 

 

 

http://www.guy-croft.com/phpBB3/viewtopic....f=13&t=1360

Edited February 26, 2008 by christopher

[Rippthrough 98]

Interesting, I tried to register a while back for his thoughts on my budget/rushed head but never got any confirmation e-mails.

 

Interesting that he says the flow goes no-where near the valve guide - well, no, in stock trim it has diverters, but you can smooth those out and waist the guide to pick up some flow speed in that area because you aren't diverting the airstream then.

[Sandy 191]

Interesting, but I'm generally more concerned about the inlet manifold that will be fitted, which is far more influential on TU 8v performance than "improving" the port flow. To illustrate this, we've seen 185psi BMEP several times from reputable heads on regular manifolds (S1 inlet, Chadil manifold or bike bodies manifolds), but also 185psi BMEP using a careful TB inlet design on a standard engine, standard head, standard cam. I typically see over 205psi BMEP using my manifold designs with Shillaber heads and 280ish catcams.

[24seven 104]

Blimey, though I know nothing of the technical side of all this, that thread is VERY interesting, and I like how Mr Croft discusses the problem with others this way. All very interesting stuff, I'm really looking forward to studying this kind of thing in more detail at university.