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-   -   Carburetor Setup Questions. (http://forums.pelicanparts.com/porsche-911-technical-forum/901886-carburetor-setup-questions.html)

Porschestraße 02-09-2016 04:07 PM
Carburetor Setup Questions.
 
So I just picked up a set of a Weber IDA46's for my 1981 Euro SC. The carbs came with every jet known to man...so my question is; does anyone know what they should be jetted at and set to if I am located in Omaha, NE?

Cheers,
Ben




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zedsn 02-09-2016 04:26 PM
Just a question to the carb gurus are 46 too large for a 3.0 euro?

Porschestraße 02-09-2016 08:16 PM
Quote:
Originally Posted by zedsn (Post 8991538)
Just a question to the carb gurus are 46 too large for a 3.0 euro?

I did my research prior to and got in contact with PMO and Rod, they both agreed that the 46's were just right for the 3.0.


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snbush67 02-09-2016 09:14 PM
Quote:
Originally Posted by zedsn (Post 8991538)
Just a question to the carb gurus are 46 too large for a 3.0 euro?
No, I ran 46's on a 3.0 for a while before I built the motor up to a 3.2. No issues.

snbush67 02-09-2016 09:18 PM
This is how my PMO 46 were set up:

Venturies: 38
Main: 160
Air: 190
Idle: 55
Idle Air: 130
Emul: F11

Porschestraße 02-10-2016 04:04 PM
Quote:
Originally Posted by snbush67 (Post 8991876)
This is how my PMO 46 were set up:

Venturies: 38
Main: 160
Air: 190
Idle: 55
Idle Air: 130
Emul: F11

Great! Thanks man!


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Gordo2 02-10-2016 05:30 PM
Carb Set Up and Tuning
 
Some in depth info on my tuning efforts with PMO's.

Gordo

http://forums.pelicanparts.com/911-engine-rebuilding-forum/821976-gordos-pmo-carb-tuning.html

Ayles 02-10-2016 06:13 PM
I have 40s on mine, what can you expect by going up to 46?

snbush67 02-10-2016 08:29 PM
Not so much an issue with PMOs, or Weber 46's that have been upgraded by performance oriented.

http://www.performanceoriented.com Will answer all your carb tuning questions, look at tech 1 and tech 2 tabs.

Quote:
Originally Posted by Steve@Rennsport (Post 4731569)
Just remember, venturi size plays the biggest role in airflow at all throttle openings. This allows you to tailor the carb configuration a bit to each engine's displacement, camshshaft profile and RPM operating range.

The main limitation to using a 46mm Weber (with smaller venturies) on smaller engines in relatively mild tune are the somewhat crude, idle and progression circuits. This is another place where PMO's are FAR superior,..... :) :)


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