Thread: Major lean AFR spike when secondaries open after stabbing throttle.
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Old 12-30-2019, 10:03 PM
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Tom Vaught Tom Vaught is offline
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Quote:
Originally Posted by Formula jg View Post
Update.
Road test revealed no improvement to the stab and stumble at cruise below 2300rpm.
Changes were as follows:

Block middle E-hole (1 and 3 at .026)

What was a common IFR size for an old Holley 850 mech. sec. DP?

I’ll try anything at the point, weather permitting.
(HOW MANY EMULSION HOLES DO YOU HAVE ON ONE MAIN WELL OF YOUR METERING BLOCK? 3, 4, OR 5 EMULSION HOLES.) STOCK WAS 2 ON ONE MAIN WELL AND 2 ON THE OTHER MAIN WELL.?


STOCK IDLE FEED RESTRICTION ON THE 4781 850 CFM CARB was .038".

Tom V.

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