Yup. I built one many years ago using water manometers to measure flow. It's
not hard but you run into some fairly consistent problems with low CFM flow
benches--most difficult to solve is the flow variations. You're loading the
air pump at it's limit so it's flow tends to wander a lot. Hard to get
repeatable results. I kept upping my pumps--I had five or six modified
vacuum cleaners drawing on a single plenum with an automatic "waste gate"
(just a big flapper valve with an adjustable weight to shut it) to try to
get a steady flow. Hard to hear the radio with all that going on.
-----Original Message-----
From: owner-fot@Autox.Team.Net [mailto:owner-fot@Autox.Team.Net] On Behalf
Of christian jensen
Sent: Wednesday, January 05, 2005 1:46 AM
To: fot@Autox.Team.Net
Subject: RE: Porting Heads
anywone build their own DIY flowbench ?
like this or ? : http://www.diyporting.com/
Christian
>===== Original Message From "Scott Janzen" <s.janzen@comcast.net> =====
>I'm building up a new engine for my vintage race GT6 MkII. Any
>comments on improving the porting on my own, versus having someone with
>more experience and/or a flow bench do it? I've read through Kas'
>guidelines, have the air tools, and in fact did this years ago on a
>motorcycle, but that doesn't make me an expert.
>
>Also, should I be planning to mill the head or block to increase
>compression? Planning on using flat top Venolia pistons.
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