Quote:
Originally Posted by jabbott
No, its 11.0 at 3000 rpm and 12.8 at around 5000 rpm.
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First off i wonder if these AF- values have been obtained in a steady state rpm/load, or if these are what you see while opening the throttle in a pull?
If it's a pull- meaning acc pump is doing something, then you know its acc pump tuning needed.
With such a low rpm engine, I would guess you'd need some fuel bypass in the acc pump curcuit.
You could also tweek the springs/ rod to move the length of stroke and when it comes in (if I remember correct).
If it's steady state AF numbers, there are other things you need to adress, like the main venturi, air/ fuel and emulsion.
First off you should go with the 37 or maybe smaller main venturis and see what they'll do.
If it still persist, you might need a emulsion tube giving more fuel at the top and then go down on main fuel.
With the IDF's on my 347 there was also a rich- spot in the transition. It made the engine a little lazy out of the corners.
You can check in the Weber jetting file in another thread and see what air and fuel tubes used in the 347 (up to 8000rpm) and compare, for what it gives....
RS
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