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Re: HIF4 needles (was Weber question)

To: MG Nuts <>
Subject: Re: HIF4 needles (was Weber question)
From: Skye Poier <>
Date: Thu, 2 May 2002 14:01:17 -0700
AAA is richer than AAU.  There's a needle profile program around
somewhere (probably on if you want the gory details

AAA might be the right needle for you, its largely a matter of trial
and error.  Mostly error.  An A/F gauge will help in tuning, or I
believe the "old school" way is to drive at a certain RPM for a little
while, then shut off the ignition and coast to a stop and check the
plugs for a nice tan colour, then go again at another RPM until you have
enough data points to know your needle is OK.


Word on the street is Steve Shoyer said:
> I am planning to replace the ABD jet needles in the HIF4 setup in my 1980 MGB 
>with AAA needles.  I called Joe Curto and was told that the AAA needles are 
>the typical ones to use with K&N air filters.  What's the difference between 
>the AAA and AAU?
> --Steve
> > With an otherwise stock 79 engine the HIF4 are the way to go, with a
> > free-flow air filter such as K&N's and AAU (moss 374-380) needles
> > and yellow damper spring (moss 021-081)

1966 MGB - GHN3L     Safety Fast!             __,__\__ 
The MGB Experience   (_o____o_)

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