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Posted by Greg P.
on 10/26/2009, 3:19 pm, in reply to "Re: Car Runs Good, but gasps when stomped on"
76.183.152.5
Billkubi
1st. fuel PSI @5.5 to 7 max for 4160!
2nd. floats, side pivot,inverted, Primary #10 drill or .193". Sec. #2 drill or .221"
Center pivot floats,inverted, Pri. 3/8" or .375"
Sec. 13/32" or .406"
3rd. Vacuum reading from warm engine at rear of manifold,get reading divide by 2,if vac reading is 13 divide by 2 equals 6.5, your carb should have a 6.5 power valve.
4th. A 4150/4160 should NOT have a squirter, (shooter) bigger than a 27! And both gaskets installed!
If it matters a #25 or #26 will provide better gas milage.
5th. An accelerator pump is to shoot fuel at the boosters(into the bores) to help the carb transition from idle circuit to the power circuit, when the throttle plates open and a vacuum is being created the boosters will shower the venturi with fuel from the power circuit and the fuel that is stored in the fuel bowl. The accelerator arm should move as soon as the arm moves on the cam, fuel should spray the boosters at the same time, a squirter too large depleates the fuel supply too soon, carb stumbles, not enough fuel before the throttle plates open up.
6th. At(WOT)Wide Open Throttle the dimension between the Acc. pump over ride spring and the Acc pump arm should be between .015"and.025"
Do an inspection and make some corrections, you should be good to go.
Good Luck
REMEMBER!!! When posting a question about your Mustang or other Ford on this FORD MUSTANG FORUM, BE SURE to tell us what it is, what year, engine, etc so we have enough information to go on.