TPI Runner Question

[Shannen Durphey]

Gotta mention there are sometimes subtle differences between F car TPI
and Y car TPI systems.
In my experience, most Y car TPI systems have small notches cast in
the TB which allow idle air to enter the plenum.  On a few occasions,
I've seen the "special passage" systems.  I know this because they use
a different TB gasket, which I usually don't have in stock.  But the
vast majority of TPI manifolds on which I r&r end gaskets (RTV
Sealant, Hoo Boy) are 86 to 89 units.  Bottom line, don't ask the
list, check your TB and plenum. 


Shannen


Bruce Plecan wrote:
> 
> Well just wish I could send you a photo, cause my early TB has two cutouts
> to the channels behind the butterflies, from the IAC.
> This is a TPI for the early heads, and has a 9th injector.
> I have it in my lap as I type right now.
> The only passage ways are the PCV, and a ported vac signal.
> Very easy to look at and see what's goning on with this one.
> Ther may be more then one version of TB but I have this one here if anyone
> wants to drop by an look at it, so there is no doubt about what I have in my
> hands.
> Bruce
>   I'm not claiming they are all this way, I'm just saying the one I have
> here is this way.
> 
> > Bruce - the TB's IAC outlet on pre '89 TPIs mates with the entrance to the
> > 'special' passageway of the plenum.  Thus, if you don't have the correct
> > runner that mates with the plenum then the IAC does NOTHING because the
> > IAC air has never gets into the incoming air.
> > Tim
> 
> ----------------------------------------------------------------------------
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo at lists.diy-efi.org
----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org