44HPMX carburators

[MeeferMadness]

I have a set of EMPI 44HPMX carburetors that I would like to use on my 1776 engine. Has anyone used this combination that could help with proper jet sizes?
Also I have not been able to determine what the differences are between the 40HPMX and the 44HPMX. I believe the carburetors share the same size body but the throttle plates are different sizes, beyond that I am unsure.
Anyway If anyone could shed some light on this it would be appreciated.
Bruce

[plywoodkid]

Meefer,

I think the 44’s are too big.

However…..

The Weber Tech Manual states the following as a starting point for Duals:

1. 1600-1835
2. 28mm Venturi
3. 210 Air Correction
4. 140 Main Jet
5. F11 Emulsion Tubes
6. 55 idles.

I believe this is no matter whether own a 40 or 44 IDF. I think the challenge is getting a larger flowing carb to breath like a 40. Your 44’s are probably set up larger than this.

I would give Jeff at Kaddie Shack a call in Pasadena, CA as he sells HPMXs. My comments are strictly based on Webers since HPMXs are supposedly clones.

Good Luck

[Dan Ruddock]

Depends on your heads and exhaust. Big valve ported heads and exhaust, go big on the carbs. Small heads go small carbs.

[MeeferMadness]

I am using big valve heads and 1 1/2" header pipes
Bruce

[KEGZ]

I ran 44s on a 1776. It wasn't dialed in and ran rich. But ran it did.

My uncle revving it in his garage

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