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Re: Matching the inlet manifold...smooth or not?
Posted: Wed May 23, 2012 10:50 pm
by coaster
warts wrote:It's fairly obvious that you can flow more WINE through a bigger hole. The neatest trick is to flow the most WINE through the smallest hole........I'm on holiday in france atm................ be assured I am having a great time and any grammatical and spelling mistakes are due to google translator and the free availability of alcohol, yup my bro in law the wine maker is here again.
Good oportunity to test the venturi effect, the human flow bench :fb:
Re: Matching the inlet manifold...smooth or not?
Posted: Wed May 23, 2012 11:16 pm
by Stokie
Harry Barlow supports the high velocity argument that Warts refers to.
My question is will you actually notice any difference between a polished vs a 'textured' port on a StageIV barrel?
Re: Matching the inlet manifold...smooth or not?
Posted: Thu May 24, 2012 6:33 am
by Special X
Smooth but unpolished is best. Best results are achieved by keeping the area of the inlet tract uniform all the way along (not easy ask Harry Barlow the lengths he goes to, to try and achieve this). The finish you want is what you get with a dremel and a medium sanding drum.
Re: Matching the inlet manifold...smooth or not?
Posted: Thu May 24, 2012 8:07 am
by warts
coaster wrote:warts wrote:It's fairly obvious that you can flow more WINE through a bigger hole. The neatest trick is to flow the most WINE through the smallest hole........I'm on holiday in france atm................ be assured I am having a great time and any grammatical and spelling mistakes are due to google translator and the free availability of alcohol, yup my bro in law the wine maker is here again.
Good oportunity to test the venturi effect, the human flow bench :fb:
Will do you guys. Ho Ho Ho!
Surface finish is a funny thing. During my stint in the inspection dept at Dunlop, someone shoved a batch of aluminium parts through a wheelabrator which was set up to de-scale forged steel parts and was pretty aggressive. We all thought they would be scrap, but when we measured the surface finish, well wern't we surprised to find they were in spec and usable.
http://www.airflowresearch.com/articles ... 5/A-P3.htm
shows a picture of the sort of finish. Lots more to read and look at.
If you notice the prices, for 32 ports and combustion chambers... As cnc machines become cheaper, maybe someone will try on a scooter?
Re: Matching the inlet manifold...smooth or not?
Posted: Thu May 24, 2012 12:38 pm
by Tommy Boy
Thanks for the info lads... much appreciated