Starting car for first time, baseline setting on carbs Options

[MattR]

Im about ready to start my 914 for the first time and break in the motor. I have a set of 40 idfs on there that im guessing are out of adjustment. How many turns out should I set the needles at to get it to fire? I know I have to tune it during break in, but Im just trying to get it to start up now. Hints? Thanks.

Edit: i should have clarified. This is a 2056, dual 40 idfs, raby split duration cam.

[lapuwali]

QUOTE (Mueller @ Jul 14 2005, 03:58 PM)

QUOTE (lapuwali @ Jul 14 2005, 04:45 PM) There is no "main needle". The parts on the jet stack (the two in the center of the carb, between the throats) are, the air correction jets (175-200 are typical sizes, lower number is RICHER), ...........blah, blah, blah......... man, I tried to read that, I am more confused now about carbs than before (IMG:http://www.914world.com/bbs2/html/emoticons/wacko.gif) It is good to see people still knowledgeable about them however...who knows, in a few years finding a carb person will be as hard as it is to find an MFI person nowadays....

Hm. Maybe I should rephrase that, then.

In between the throats, there are two brass screws with holes in the center. On some IDFs, this are really tall, some are short. If you unscrew these, you'll find a there's a top part, and middle part, and a bottom part. The top and bottom parts press into the middle part. The middle part is the emulsion tube. The top part is the air correction jet, and the bottom part is the main jet. The mains control fuel mixture from roughly 2500-4500rpm, the airs from roughly 4000-up. The idles jets control from 1500-3000, and the mixture screws below 2000. The overlaps are intentional.

Trouble for me is, I figured all of this out about Webers over the past couple of years, and the engine I'm getting at the weekend has Dellortos on it, so I'll be learning a new set of carbs (until I manage to fit PEFI onto it). I only have Weber books, so I'll be looking around for a book on the Dells soon.