Nice Port Work - UK Company Porting

[larrycavan]

I happened on this website today.

[Rick360]

With all of that CNC equipment and high dollar looking measuring instruments and the flowbench is nothing more than a souped up SF110 clone. They only flow test at 10" and say flowing higher is unnecessary with small engines. Don't think I agree with that statement. Nice looking port work, but nice looking doesn't mean much.

What's up with calling them "gas flowed" heads? Is that what they call it in UK, or is it just their own marketing gimmick?

Rick

[larrycavan]

[hollywood63]

I'm not going to doubt anyones porting skills here or the fact that yes the site has some nice LOOKING ports. But being this is the porting side of the forum what is the purpose of cutting the valve guide down and leaving the back side of the guide below the port ceiling?
I'm not sure what the "stock" port looked like but the ports seem to be for a High RPM eng. no??? ???
Art

[larrycavan]

[SWB]

"Gas flowing" is a common Euro Term.

Do they do the valve job too? They didn't seem to mention much of that on their site, but if they don't, you may not be getting much...

Sean

[larrycavan]

[cboggs]

It does look nice, .. but I build a few heads they have on their
site for a few racing series. Won the US & Canadian champoinships
with them, .. and their flow numbers are nothing close to what we get, ..

Curtis

[larrycavan]

[cboggs]

Thanks larry, .

Curtis

[RWD19T]

After recently completing my own flowbench I found the VW 8V figures to be highly inflated in stock and ported form. With the nature of the curve being equal to that of a bench calibrated at 28in drop and then being flowed at a 10in drop. The VW 16v heads however appear to be spot on in the ported form. However they fail to show in the standard form the massive flatspot these heads suffer from between 200-450thou lift. Personally I think it is a good thing to show crap standard figs. Go figure.

[jsa]

For the YB heads they use bore adapters 2mm larger than normal bore size resulting in any easy increase in flow.

[SWR]

[SWR]

After reading up a bit on those heads and their PFA-sheets,I'm not impressed either... a 3.9375" bore adapter used on an engine with a stock bore of 3.5756"... Supposed to be a big-valve monster head,and the intakes are stock at 35mm (1.37") and the exhausts are 31mm (1.22") which is one mm up...port areas are off,and the "stock head" they're comparing with have smaller than stock valves... really,really impressive. ???

[larrycavan]