09-08-2012, 08:21 PM
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CC Member
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Join Date: Jul 2012
Cobra Make, Engine:
Posts: 12
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Not Ranked
Quote:
Originally Posted by Caprimaniac
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?
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Its a wot pull on a mustang chassis dyno.
Quote:
Originally Posted by Caprimaniac
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).
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Yes i am going to put some bypass in the pump shot to even out the afr on the initial hit.
Quote:
Originally Posted by Caprimaniac
First off you should go with the 37 or maybe smaller main venturis and see what they'll do.
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I have a 36 on order.
Quote:
Originally Posted by Caprimaniac
If it still persist, you might need a emulsion tube giving more fuel at the top and then go down on main fuel.
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Couldn't I just keep the same tubes and lower the air jet (same thing as a high speed air bleed on a holey) which would also richen up top, then lower the main jets to get the afr I want.
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