So I guess with the 1.78 valves, roller cam and gasket matched heads I could be
a bit above that. Maybe I'm not that out of whack. The engine runs
beautifully except during very light throttle cruise at low rpm. 1500 or so.
Thanks
Scott
-----Original Message-----
From: Steve Laifman [mailto:SLaifman@SoCal.rr.com]
Sent: Sat 9/25/2004 11:48 AM
To: Scott Hutchinson
Cc: tigers@autox.team.net
Subject: Re: Carburetor Jetting
Scott,
With a stock 260, F4B. 1848 (465 CFM) Holley 4 BBL, Pertronix ignition,
fast advance curve for full-in at 2350 rpm (stock mechanical and vacuum
advance limits), plain color spring for secondary vacuum control. I
find my Edelbrock fuel-air ratio meter reading slightly rich (good for
today's junk gas) under all throttle conditions. Smooth acceleration, no
stumble on quick punches, lots of rubber left at low speeds (wide ratio
tranny, 2.88:1 rear end).
I changed the main jets (only) 2 numbers higher than stock. At this
size, that is 0.001 per number. I believe that is #59.
Runs super smooth.
Steve
Scott Hutchinson wrote:
>How far above stock is reasonable?
>
>Holley lists size 57 jets for the 1848. I am up to 60s and it still
seams to have a little lean stumble just off idle.
>
>Scott
>
>
>
>
--
-----
Steve Laifman
Editor
http://www.TigersUnited.com
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