[Shotimes] Interesting...porting the intake

[Bruce Malachuk]

bahhh die grinders are for wusses. Dremels just need new brushes and they
need to be hanging so they get good airflow.

:-p

----- Original Message ----- 
From: "Bob and Anonda" <bobnanonda@cox.net>
To: <stevetatro@att.net>; "'Bruce Malachuk'" <bmalach1@nycap.rr.com>;
"'SHOtimes'" <shotimes@autox.team.net>
Sent: Tuesday, August 05, 2003 7:00 PM
Subject: Re: [Shotimes] Interesting...porting the intake


> Get a die grinder, you'll go through at least 3 Dremels trying to get this
> done. :)
>
> Bob
> ----- Original Message ----- 
> From: "Steve Tatro" <stevetatro_shotimes@att.net>
> To: "'Bruce Malachuk'" <bmalach1@nycap.rr.com>; "'SHOtimes'"
> <shotimes@autox.team.net>
> Sent: Tuesday, August 05, 2003 4:40 PM
> Subject: RE: [Shotimes] Interesting...porting the intake
>
>
> > You may have just found the secret solution to the 300-hp "stock"
> > Yamahammer!
> >
> > I knew those old stories weren't just...well...stories!!!
> >
> > Let us know how it turns out.  If there's only a few HP to be gained, it
> > may not be worth the trouble.  If you're right and there is noticeable
> > low-end increase, we may all be buying new Dremels very soon.
> >
> > Steve "I don't yet own a Dremel" Tatro
> > Red/Black '93 with 169k miles
> > Cincinnati, Ohio
> >
> >
> >
> > -----Original Message-----
> > From: shotimes-admin@autox.team.net
> > [mailto:shotimes-admin@autox.team.net] On Behalf Of Bruce Malachuk
> > Sent: Tuesday, August 05, 2003 4:27 PM
> > To: SHOtimes
> > Subject: [Shotimes] Interesting...porting the intake
> >
> >
> > Well over the past few days I decided to put my dremel to the test and
> > port a portion of my intake. Mainly enlarging the TB area for a 69mm TB,
> > which I got for $40 and it turns out to be an 89 TB so it has a much
> > lighter return spring than the 94 one that was on my car. So I ground
> > out the opening and smoothed it's transition, making sure to leave a
> > slightly rough surface. Then I decided to look at the openings of the
> > runners with my new felpro set. Well we all know that there are gains to
> > be had from gasket matching and whatnot, but something I found that was
> > not expected.
> >
> > The mating surfaces of the tanks to the long runners are in particular
> > very very mismatched. If you take a dental mirror and look thru the
> > front tank when the long runners attached you'll see a 1-2mm lip that is
> > quite mismatched. I have yet to finish, but I think this mismatch might
> > be considerably more important to the low end of the engine than even
> > gasket matching the runner to head interface. I'm just guessing here but
> > I'm thinking that the lip is causing a 5% or so blockage to the long
> > runners, and with that creating a ton of turbulence to the low end. I'm
> > planning on gasket matching an intake entirely other than the runner to
> > head mating surface, and then leaving one stock and trying to take them
> > to a dyno day and swapping them. I think the mating surface to the tanks
> > on the long runners has a ton of potential waiting to be unleashed.
> >
> > Wanted to see what others had come up with or seen.
> >
> > Bruce
> > 94 Opal Frost MTX
> > 93 Black ATX - winter beater then parts car :-)
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