Wrong PMO Manifolds for 3.2L

[Gordo2]

Just realized that the used set of PMO carbs that I purchased have the wrong manifold for a 3.2L. When I purchased them, I had no clue about manifold port sizes - I was focused on carb size and configuration...

The manifold that I have is a 46mm top / 36mm bottom configuration. I had seen manifolds listed with 2 numbers but for some reason, it never connected.

From top to bottom, here's the layout - 46mm carbs as measured from the base/butterfly opening:

46mm port on the top of the manifold:


36mm port on the bottom of the manifold


And then opening to the 41mm port at the head


Looks like this manifold set will be headed to the used parts board.

Gordo

[haasad]

Taper bore them or even get busy with a die grinder and some tungsten bits ? won't take long

[Henry Schmidt]

Before you modify your manifolds, make sure the flange is large enough to cover the injector cutout. If you have the CIS manifold, it may not be big enough.

[Gordo2]

Agree Henry, I doubt these could be opened to 41mm - not that I have any intent to
modify a perfectly good/nearly new manifold.

Thanks, Gordo

[toddu]

Sell 'em and get the correct ones from Richard. I'm in the same boat.

Todd

[Gordo2]

Originally Posted by toddu

Sell 'em and get the correct ones from Richard. I'm in the same boat.

Todd

Thanks Todd - you were the one who got me looking at manifold sizes from another thread I posted on the technical forum.

I'm trying not to focus on expenses (oops - I bought the wrong manifolds, there's another $400 + $60 for the insulator kit).

Just want to make sure I do things right and get the results I want. Paying too much attention to expenses could lead to cutting corners, and loss of my already frail sanity

Gordo

[Eagledriver]

I don't think the 41mm manifolds will be any better at covering your intake port. The CIS insulators are what cover the injection cut-out.

-Andy

[Gordo2]

Originally Posted by Eagledriver

I don't think the 41mm manifolds will be any better at covering your intake port. The CIS insulators are what cover the injection cut-out.

-Andy

Possibly for older Weber manifolds, but the PMO manifolds have flanges that match the insulators (i.e. both manifold and insulator cover the injector cut-out).

I think... Gordo