fine tuning webers

[priobe]

Hello all,

I am in the process of fine tuning my webers on a 427 FE motor.

I am currently running

Choke 40 mm
55 bypass bottom of boil
100 air holder
60 idle jet
210 air corrector
F7 emulsion tube
160 main jet

I have taken the car for a drive and it drives great!!!!! Transition is perfect.

The only problem I am noticing is that it is running a little too rich on the idle circuit. Which is cause a rich smell.


My question is I am looking to lean out my idle circuit. Should I

1) change idle holder to 105 , 110 , 115 and leave fuel at 60
or
2) change idle fule jet to 55 and leave holder at 100 and open mix screws to help with any popping from intake.

Also, I have read that you can increase the main jet to help with drivability issues resulting in the transition circuit.


For example:

I began my tuning with a 55 idle and a 120 air holder and my mixture was good not too lean not to rich.

air 225
F16
155 main

Drivability was poor after 2000 RPM

I made the change to 60 idle jet and slight improvement but same.

Changed air holder to 100 , again better but not perfect.

I then change main circuit to

210 air
F7
160 main

This made driving perfect but slight rich while driving.

So should I do what is listed above or bump up main jet as well.


I guess bottom line is if I bump up my air holder and richen up the main (not idle) will this help with letting to lean out stand still idle.

Thanks