Zeniths on a 3.6

[dinobx]

Hey all,
I'm trying to figure out if I can use my Zenith's on a 3.6. From my understanding this is a matter of figuring out the right venturis, jets, emulsion tubes, etc. I also understand MotorMeister says they supply them but have had no success contacting them. They won't reply to emails or telephone calls.
Any assistance would be appreciated.
Dino

[Joe Bob]

Plenty of RECENT threads on the subject. 40 Zs on a 3.6 may be a bit small for track use.....OK on the street.

As to why do you want to lose the 3.6 FI...that's another question. I have it on my SC/3.6 and it's pretty much idjut proof....

As to Motor schitzheadster....don't believe what ya read from those wankers....

[pcar9119]

A stock Zenith 40 will not work on a 3.6. You would need a 40mm venturi atleast. Thats the diameter of your actual throttle bore. You could machine the throttle bores to a 44 or 46, find new throttle plates and then install 40mm vents. That was quick math, but I'm sure I'm very close on that.

[Porsche_monkey]

Originally Posted by dinobx

I also understand MotorMeister says they supply them but have had no success contacting them. They won't reply to emails or telephone calls.

Consider your inability to contact them a blessing and move on....

[Joe Bob]

Do a search on "Roy is a Moron".....

[Porsche_monkey]

Originally Posted by mikez

Do a search on "Roy is a Moron".....

Nominated for quote of the year. Good one!

[barney911rs]

If you are set on using carbs, look at PMO instead.

[Steve@Rennsport]

Zenith's in any configuration will be far too small for a 3.6; venturi's, jetting, accelerator pump volumes are just a few of the issues.

You need 46mm PMO's (or Webers in excellent condition) to see anything close to the potential of a stock 3.6,....

[dinobx]

I'm trying to avoid using PMO's. I saw recently an ad to sell their business in Panorama.

On the Zenith's, from the research I've done, I really need to figure out what parts and sizes I need and then (jets, emulsion tubes, venturis, anything else I'm forgetting?) I should be able to have them fabricated. I'm expecting MotorMeister will not come through.

Also, need to figure out what manifold I'll use and how/where to source that.

Dino

[Steve@Rennsport]

Originally Posted by dinobx

I'm trying to avoid using PMO's. I saw recently an ad to sell their business in Panorama.

On the Zenith's, from the research I've done, I really need to figure out what parts and sizes I need and then (jets, emulsion tubes, venturis, anything else I'm forgetting?) I should be able to have them fabricated. I'm expecting MotorMeister will not come through.

Also, need to figure out what manifold I'll use and how/where to source that.

Dino

IMHO,...there is nothing to worry about with PMO, its current owner and a potential new one. Its a VERY well supported product (far far better than most).

There is not a better carburetor for 911's than the PMO, hands down and I consciously avoid using old Webers or Zeniths unless vintage racing rules require such things.

JMHO, but I'd avoid MM at all costs,...............

You will need a pair of PMO manifolds for the 3.6 (3-bolt flanges) since they are the ONLY manufacturer of those items.

[barney911rs]

Dino,

Steve is a great resource of information. I would trust what he's telling you.

[slodave]

Originally Posted by dinobx

Any assistance would be appreciated.
Dino

Stay away from MM.

[LakeCleElum]

Originally Posted by slodave

Stay away from MM.

I have TIN-40's on my '69. When I was looking for parts, MM's web site indicated they would go thru a pair for a mere: $800......Hell, I bought a spare set for $100 and a rebuild kit for $75.