Holley 4777 Boosters
11-13-2006, 05:03 PM
#1
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Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Holley 4777 Boosters
Hey guys, just curious... are there any kits out there for different style boosters for a 4150 (4777 specifically) style Holley? How are the boosters removed/installed? I've looked at Summit and Holley's website, and can only find kits for the 4500 carbs (Dominators).
I've heard that it may be good to change from the original straight-leg boosters to a set of down-leg boosters like my 750 VS has, or to annular boosters. What kind of change would I see from changing the boosters? Power? Drivebility?
I've heard that it may be good to change from the original straight-leg boosters to a set of down-leg boosters like my 750 VS has, or to annular boosters. What kind of change would I see from changing the boosters? Power? Drivebility?
11-13-2006, 06:06 PM
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Car: 1984 Z28
Engine: SLOW carbed ls
Transmission: TH400 with brake, 8" PTC converter
Axle/Gears: moser 9" 4.11
call the carb shop in california and talk to them, not something you can swap out at home anyways.
11-13-2006, 09:59 PM
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it's probabily more cost effective to change the main body to a Holley HP or a ProForm main body and work from there.
For $100(US) You'll pick up air flow, metering strength and air bleed tunability all at once. You'll eat that up easily paying a carb specialist to modify/change your boosters and dial in the new fuel curve.
For $100(US) You'll pick up air flow, metering strength and air bleed tunability all at once. You'll eat that up easily paying a carb specialist to modify/change your boosters and dial in the new fuel curve.
11-14-2006, 06:51 PM
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Car: '83 Z28, '07 Charger SRT8
Engine: 454ci, 6.1 Hemi
Transmission: TH350, A5
Axle/Gears: 2.73 posi, 3.06 posi
Why does a pro have to change the boosters? Thats what I don't understand... why isn't this something I can do myself?
I don't want a HP or ProForm body, because they have no choke. This car is still street driven, so I want to keep whatever little bit of 'manners' it has left lol.
I don't want a HP or ProForm body, because they have no choke. This car is still street driven, so I want to keep whatever little bit of 'manners' it has left lol.
11-15-2006, 01:39 PM
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Car: 1987 Iroc-z Convertible
quick fuel charges $40 to change boosters. I am getting mine done from the straight to downleg next week. mine is in a proform main body but should be the same price if you take off the choke plate when you send it to them. there is a special tool to do it. if you want mor einfo pm me. they told me unless you are making alot of power than stick with the downleg.
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