> Date: Tue, 22 Jun 1999 11:44:00 -0700 (PDT)
> From: Jeff Newton <Jeff_Newton@pmc-sierra<img src=/i/dc.gif border=0 width=35 height=15>>
> Subject: [gti-vr6] Schrick Manifold Gains?
> Anyone know what gains can be expected from a Schrick
> manifold on an otherwise stock OBDII VR6?
I haven't seen any dyno charts of it on a stock engine, but
here's before and after on an engine with 268's:
I expect you'd see pretty much the same gains even without the
cams; maybe not as much on the top end.
> I may be able to get the VW VSR intake manifold which
> I like better don't have to pull it to get at the plugs)
> so does anyone know how it compares to the Schrick?
It's "smaller". It will give you roughly the same shaped torque
curve as the Schrick but it will not give you the as much extra
power at the top end (if any at all).
> Date: Tue, 22 Jun 1999 15:14:25 -0500
> From: "Steve Thompson" <stevet@toast<img src=/i/dn.gif border=0 width=35 height=15>>
> Subject: Re: [gti-vr6] Schrick Manifold Gains?
> What's the trick? I have access to the VSR, and a few friends
> who will be interested if it worked on OBDII.
It is not going to be easy to get a VSR to work on an OBD-II
1) The OBD-II throttle body will not fit correctly. I suppose
this could be dealt with by a competent machinist, and perhaps
you'd need some welding too, I don't know for sure. I think
you'd also need to plug the EGR port, but that should be easy.
2) You will have to find some means of controlling the vacuum
solenoid. OBD-I ECUs have a spare output for this, and there is
a special chip available to toggle that output for the VSR. I
don't know if an ODB-II ECU has such an output, but it doesn't
really matter since there is (AFAIK) no VSR software available
for the OBD-II ECU. I suppose you could use a generic RPM
switch, or even the Schrick black box to do it...
PS: The above referenced dyno chart belongs to Air & Water.
Todd knows why I've temporarily "stolen" it and posted it on my
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