"Blow, or Hardly Blown," etc.(LAC)

[james accordino]

Cool.  It's nice to see someone agree with me, even if
I don't know what I'm talking about.  My experience
was with small block Chevys.  My best success was with
a particularly wicked cam.  A Lunati split lift.  I
think it was like .517/.519 with split duration.
Something like 304/306.  At first it wouldn't even
idle at less than 1500-1800 rpm.  I did some of the
exact things you described and found some gains in
both performance and driveability in the low end.  I
also got it to "idle"-if you can call it that- at
about 1100.  I ran a Holley 750 DP carb, so vac.
wasn't an issue.  But that cars top end was unlimited.
 Except by the internals nasty habit of wanting to
become externals.  What all this has to do with a
turbo 5, I haven't yet figured out.  I think a few
more yrs. and some more time to tinker will allow me
to find some answers.

Thanks
Jim Accordino

I'm amazed at the difference in our hot rodding
experience.
--- "Fisher, Scott" <Scott_Fisher at intuit.com> wrote:
> Jim Accordino writes:
>
> > "bowls" directly above the valves.  On this list
> > there's been discussion about NOT port matching on
> the
> > exhaust side.  Something about pulse reversion.
>
> Exactly.  I've done this (and the equivalent on the
> intake side, too, but in
> the other direction of course) on
> naturally-aspirated engines, and it seems
> to work.
>
> The principle is to introduce a "step" between the
> port and the manifold.
> When gas flows out of the smaller port into the
> larger manifold, it does so

BIG snip...

> --Scott Fisher
>   Tualatin, Oregon
>
> --
>


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