Is this the result of dyno testing or is it what your gut tells you? I was
curious about that; carbureted engines have the fuel/air mixture travel the
whole intake so it's good to keep the charge mixed up and also to keep fuel
from adhering to the intake walls. On injected engines, though...I haven't
read anything specific about what actually works best. I'd think the short
intake runner and the small amount of pre-entry turbulence you get from the
walls wouldn't do much for the charge mixture, but there's some outfit that
does Honda heads that maintains it does. But they might be regurgitating
the same old-school rule of thumb that I was. Appreciate your insight into
the matter.
So...I coulda polished my old Volvo intakes, eh? Damn. Well probably
wouldn't have made that much of a diff...
-----Original Message-----
From: mike kojima [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, March 06, 2001 4:35 PM
To: Sentra Mailing List
Subject: Re: SML: RE: Re: Phenolic Spacers
Actualy this only used to be good for carburated
motors. With EFI port injection, mirror polish won't
hurt anything. In fact, extrude honing leaves pretty
much a mirror finnish.
Even though the heat tranfer stuff does not really
work out, keeping the manifold cooler does seem to
help on sevral cars where I experemnted with taking
the hot water out of the manifold.
Less power loss after repeated dyno pulls seems to be
the effect.
Mike
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