SQ manifolds, and RS2 intake manifold question

auditude at get.net auditude at get.net
Mon Apr 1 16:37:30 EST 2002

On 1 Apr 2002 at 17:32, Brett Dikeman wrote:
> At 2:13 PM -0700 4/1/02, auditude at get.net wrote:
> >My other question has been bugging me for a while.  The RS2 intake
> >manifold, the one that says "Powered by Porsche" on it.  Does it
> >produce any gains over the stock 3B intake manifold?
> I don't think it's a lot...it also requires machining from what I'm
> told; the RS2 didn't have a distributor, 3B does(whups.)

This "may" not apply to me, as I will be using standalone EFI.  I do have plans to
investigate the use of the AAN camshaft position sensor, which sits in the (existing in
the AAN head?) distributor hole.  The idea would be for this to provide the sync
signal for sequential injection and direct ignition, as well as plug the hole.

The motor in question will be a one-off of sorts, altho' others have put together similar
combos.  MC block/crank/rods, custom pistons, programmable EFI, and 7A head.

> I think
> someone told me that it would be much cheaper to obtain darn near
> equal results by just matching the IM/gasket/head, and extrude-hone or
> polish the stock intake.  EH is seriously expensive at least for heads
> and its something like two week turnaround from when they get it.  No
> reason a local performance shop can't work over it.

I still hear about people match-porting the intake manifolds, like to the gasket.  On
the other hand, I've heard that the anti-reversion lips should be retained.  The latter
being the case, and I'm inclined to believe it is, I'm not sure how large the gains are
to be had in the intake manifold.

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