[Shotimes] Interesting...porting the intake

[Bob and Anonda]

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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