34 DATR on 1300: Jetting Question

[Eastep]

What jets should I run using a 34 DATR 250 on my 1300? The 250 was designed for the Lancia 1600 twin cam and jetted accordingly (300cc more then my engine requires) I've searched N54 and most topics regarding the 34 jets are for use on a 79-80 1500 not 1300. I plan on calling Peirce Manifolds Monday and talking to a Weber specialist, but I just wanted to see (1st) If anyone else has one on a 1300 and (2nd) what jets tubes and correctors they are using. I would also like to know which 34 they are using 32/34 or 34/34 (mine is the later). My car has the stock cam,1500 intake,4-1 header and 3 angle on a Yugo head. At 6 seconds in the video you can hear the stumble at WOT. The car was running with an open header and I attribute some of this to lack of back pressure but I think its jetting more then anything. I have several spares jets from a couple 28/32's to experiment with (thanks Dave). Thanks everyone for reading and watching.
http://www.youtube.com/watch?v=asaRoB29OX0

 

[Ricardo Borja]

1300 stock

must use main injector
250 air
F30 body
110 corrector

secondary
175 air
F30 body
110 corrector
But this numbers can change on any car, smaller number on air and corrector will more rich the mix.

I bought I new on box sealed weber 4 years ago for my 1500 and I have a brand new 1300 in box and both has same numbers jets

F30 is the common body for 1300 or 1500 but some carbs has F24's

play with your jets (just keept separate your originals before to start and take notes) if you mix all, probably you'll have some problems to adjust.

 

[Eastep]

Thanks Ricardo. I'm planning on playing around with the jets next week. It just seems that maybe the 34/34's secondary idle (IIRCC aids in transition at WOT) might be off a little. Another concern of mine is the accelerator pump as when I move the throttle linkage I don't see the normal drip of gas come from the brass tube in the venturi :huh2: Can you show me a pic of the pump and where I could get a new diaphragm?