One line from the divertor valve(?) goes to the AIR tubes in the manifolds (or headers ) and one goes to the cat.

Outboard goes to cat or headers?

Inboard (closer to throttle body) goes to cat or headers?

TIA
Matthew (gonna pass emissions TODAY)

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jmd
1986 SS with...
86LB9 TPI atop the original L69, hydraulic clutch T5, Energizer 272 cam, chargedair.com fan, Global West CNR-88-C negative roll kit, 89 Iroc front springs, CC635 Moog rear springs and a whole bunch of other fun stuff

 

On my 92, the outer one runs to the cat, the inner goes to the manifolds/headers.

You can verify this pretty easily. On a cold start air will come from the manifold only side. Once warmed up in closed loop, it will only come from the cat side.

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Ed Maher - Moderator @ The TPI & Carb Boards
92 Z28 Convertible - Quasar blue / Tan top
305 TPI A4 2.73 - 14.8 @ 93.1
Stock except ported plenum and dual cats
-=ICON Motorsports=-

- Definitely prototypes, high powered mutants of some kind. Too weird to live, too cool to die

 

Thanks Ed. Emissions yesterday went very well



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jmd
1986 SS with...
86LB9 TPI atop the original L69, Hooker emissions legal PN 2050 headers, stock L69 cat (yes, a real one), hydraulic clutch T5, Energizer 272 cam, chargedair.com fan, Global West CNR-88-C negative roll kit, 89 Iroc front springs, CC635 Moog rear springs and a whole bunch of other fun stuff

 

Again thanks Ed. Here's my numbers:

High Speed Emission Results:

Low Speed Emission Results:

And the beautiful part is (A) It's totally the wrong cam for it and (B) the MVD didn't charge me a late fee

Matthew