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914World.com _ 914World Garage _ carbs/40 IDF's

Posted by: Triaddave May 18 2015, 05:55 PM

O.K., My 44 IDF's are too much for the 2056 engine I built. So now I am re-building some 40 IDF to replace the 44's. I expected to find the starter valve, the guide and the spring(also, wasn't there a ball bearing in there too?). I had no place to install a choke cable or pre-start assembly. Is that stuff always in there or can I just continue with the re-build?

Posted by: Triaddave May 18 2015, 06:07 PM

Oh yea, If you have a WEBER book, It is pictured on page 165-5.17

Posted by: '73-914kid May 18 2015, 06:27 PM

Many new Webers made in Spain are not machined for the choke setup. Don't worry about it, and carry on.

Posted by: vw505 May 18 2015, 06:38 PM

If your 44s workedmwell have you thought of putting in smaller vents, i dropped mine from 36mm to 32mm on my 2056.

Posted by: Mblizzard May 18 2015, 07:25 PM

QUOTE(vw505 @ May 18 2015, 04:38 PM)

If your 44s workedmwell have you thought of putting in smaller vents, i dropped mine from 36mm to 32mm on my 2056.

32s on my 44s were very nice. 28s made the low end very strong.

Posted by: sgetsiv May 18 2015, 07:44 PM

Have you measured AFR? Idle jets? Mains? AC's?

Carb tuning has to be done with some data and likely a few different jetting options.

EMPI's or Webers?

Posted by: rhodyguy May 19 2015, 11:12 AM

i returned your call this am dave.