SECONDARY HESITATION
#1
Senior Member
DYNO OPERATOR
Thread Starter
Join Date: Apr 2008
Posts: 496
SECONDARY HESITATION
MY 750 HOLLEY HESITATES A BIT WHEN I FLOOR IT IHAVE BEEN GOING UP IN SHOOTER SIZE AND IT IS GETTING BETTER,IM CONFUSED I STARTED WITH 37 IN REAR AND NOW IM UP TO A 42.SHOULD I BE CHANGING THE FRONT SHOOTER ALSO? :?
MOTOR IS IN 86 SS MONTE CARLO 3550 WITH ME IN IT,CHEVY 406 APPROX.500 TO 525 HP?,3.90 REAR,3400 STALL
MOTOR IS IN 86 SS MONTE CARLO 3550 WITH ME IN IT,CHEVY 406 APPROX.500 TO 525 HP?,3.90 REAR,3400 STALL
#3
Senior Member
RACING JUNKIE
Join Date: Jun 2003
Location: Hobbs, NM
Posts: 842
Bump your front squirter to a 42 also. You might try screwing out your idle screws a 1/2 turn or so. That will richen your idle alittle. I have also seen that the older 4150s have a solid screw in the squirter. If so get a hollow screw to replace it. That will let more fuel thru more evenly.
good luck
good luck
#5
Senior Member
RACING JUNKIE
Join Date: Jun 2003
Location: Hobbs, NM
Posts: 842
You may have to go down a little in the heat of the summer when the air isnt so good. Lots of times theres a 3000ft difference in adjusted altitude form mid summer to fall. When the air is good your idle circuit is a little lean. Thats why you needed more fuel.
#10
Senior Member
MASTER BUILDER
Join Date: Dec 2005
Location: alberta,canada
Posts: 166
Your car weight is 3350 then a 42 shooter is to big u should be around 35 or 37 in the front and the back other wise u r wasting fuel is all....set your shooters tell you get best time then change your carb cam to another setting until it starts to fall away then reset your shooters.........my car with me in it is 2645 and i use a 37 shooter any bigger does nothing for me....weight of your car has alot to do with it as it takes longer to get a bigger car moving hence the smaller shooter will give you the same amount of fuel as a bigger one but over a longer period of time.....same with your carb cams they react with your throttle so the curve of them controls your shooter fuel............that is why they have holes in them to make them more agressive or to slow it down same reason the diffrent cams have longer or smaller rams to control the fuel curve to the shooters