I'm looking for a 4BBL intake manifold for my 1974 260z. If anyone has some links or names of companies who make such a part please post em here. Also lookign for a cheap 6 to 1 header, and a decent rebuild kit. (rings, gaskets etc)

Any advice?

Hey Goose, Arizona Z Car makes a 4bbl conversion manifold. They will also sell you a rebiult carb and kit for the manifold. As well as Exhaust header. Both parts are less than at MotorSport Auto(MSA). This guy's got some really trick Z stuff for less. :devious:

www.arizonazcar.com

There is a member here on this site that was selling his Arizona Intake. He's Jeff1216. I don't know if he still has it.

Some of those brake kits on that site are incredible looking.

SuDZ

4bbl wouldn't be recommended....the fuel has to turn 90 degrees to go to the motor (as opposed to a v8 where it doesn't)

go with 2 SUs, the fuel goes in a straight line.

Don't know of anyone that doesn;'t eventually want to get rid of their 4bbl eventually off of their z.

Go with the 4bbl. I have the arizona set up and love it. No sycronizing carbs. Set it once and forget it. Why this is not a mandatory upgrade for Z owners is beyond me.

Come on, the guy asked the question almost two years ago and he has 10 posts. 4 barrel carbs as a manditory upgrade? I'm curious to see how that statement flies here even though this thread should have been left for dead.

Go with the 4bbl. I have the arizona set up and love it. No sycronizing carbs. Set it once and forget it. Why this is not a mandatory upgrade for Z owners is beyond me.

If you every drive a Z with a properly set up set of SUs, you will find that the legitimicy of your 4 barrel answer is now "beyond" you. I have driven both-properly setup (the brand new 4 barrel by a Holley trained specialist-with factory input, and a two month old set of rebuilt SUs from ZTherapy-at a track on the same day-best three out of four runs. I sold the 4 barrel kit that day, and look back only to remember this quote from the guy who told me his SUs could walk my Holley: "Tune, rejet, what every you want, Some answers are for lazy people, and some are for people who want the best performance-wanna race?"

Will

Why this is not a mandatory upgrade for Z owners is beyond me.

It isnt a mandatory "upgrade" because most Z owners have more common sense than to lower the performance of their engines, and the term "upgrade" implies improvent which it most certainly isnt.

If you find a performance gain by moving to a 4 barrel carb on a 90 degree manifold, either your SU's were poorly set up in the first place, or you woke up realising it was just a bad dream.

The "mandatory upgrade" comment came from a 260Z owner. Well, I suppose even the 4 bbl would be an improvement over the 260Z flat-tops. But when I yank the injection out of my car, it's getting round-top SUs.

Fair comment :classic: