Not Ranked
Ron:
Differences are minimal. Pretty quickly they boil down to this: The IDF utilizes an air control screw so EACH carb can be 'synched' as a unit. The IDA does not have this provision. It supposedly provides allows for a smoother idle. The IDF uses a diaphram accelerator pump whereas the IDA uses a piston design . The theory is that the piston is not as efficient as the diaphram. I have never talked with anyone who found this to be true, however. The IDF is about 1 inch shorter which is good if hood clearance is a problem. Many of the guys on the forum have used IDFs. I personally like the IDAs because they are what came with the original car. They are larger and have a more rugged look. The info on them, and the people like Enzo who know them well, gives you a great source in the 'how to' area in learning a about them. Hey.. I even have the original Weber manual from Bologna. Send me your address and I will make a copy.
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