Which carburator for ZZ4?
Thread Starter
Burning Brakes
Joined: Oct 2002
Posts: 1,228
Likes: 6
From: lancaster ma
Which carburator for ZZ4?
I know this has been asked a lot. I will be looking for a new carb and air cleaner for my ZZ4 this winter. The current carb is a Holley 5160 750cfm which acording to the formula is too much. I am on the lightest spring and the secondaries still do not open. The air cleaner looks cool but I would like something with more hood clearance and larger surface area. I have a manual transmission. This is for street use. I was thinking of a Holley 650 and thought I read in a recent post that a 670 street avenger is what Holley recommends. I would like to add headers at some point so that is a consideration as well. What make and model do you recommended for the ZZ4?
[Modified by adamdinat, 3:54 PM 10/20/2003]
[Modified by adamdinat, 3:54 PM 10/20/2003]
Le Mans Master
Joined: Apr 2001
Posts: 5,941
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From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Re: Which carburator for ZZ4? (adamdinat)
Crate Demon made specifically for the ZZ4. It is a modified 650 Speed Demon. You can choose vacuum or mechanical secondaries which every you prefer they make both versions.
Team Owner
Joined: Jun 2001
Posts: 43,136
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From: Thomson Georgia
Re: Which carburator for ZZ4? (Sigforty)
Crate Demon made specifically for the ZZ4. It is a modified 650 Speed Demon. You can choose vacuum or mechanical secondaries which every you prefer they make both versions.
Le Mans Master
Joined: Apr 2001
Posts: 5,941
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From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Re: Which carburator for ZZ4? (adamdinat)
I am running a Mechanical secondary with a 4-Speed Muncie. I have had vacuum secondaries before and with a manual the mechanicals are the way to go.
Race Director
Joined: Mar 2001
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From: Living in the Hartland
Re: Which carburator for ZZ4? (adamdinat)
With vac sec you can run a bigger carb since it is little more forgiving than mech sec. Have you tried a lighter spring in the sec? I switch to the lightest spring with a 4150 vac sec 600 and was suprised at the diff, now I cannot feel the sec open that split sec after flooring it, it is just a smooth power that is stronger right from the get go. that being said I do like mech sec better, have a 750 dp too.
