VolVette

My '75 has a ZZZ Crate Engine (first generation of the ZZ4), stock exhaust manifolds, duel 2.5" flowmasters (that come from the catalytic converter :confused: ), Holley 650CFM carb, Moroso Blue Max Plug Wires, ZZZ distributor, Accel Rotor and Coil. Everything on the ZZZ is stock and the timing is precisely tuned with the guidance of Lars.

Within the next week, I am having the catalytic converter removed and going to true 2.5" duels to the flowmaster. But what next? I want some more fun! Suggestions please?

Thanks,

Stephen

Lohkay

I think the ZZ4 has a very mild cam, you might want to change that.

ScubaJKD

Headers. Gotta get em !!!

bence13_33

I'm not sure what kind of cam the ZZ4 has...but I would get a larger cam (more duration & lift). Get rid of the catalytic converter! Those exhaust manifolds are also killing your performance, you need full length headers to allow the engine to breath properly. A bigger carburetor (750cfm) couldn't hurt either. Then again it's easier for me to spend YOUR money for you :) All in all your next upgrade should be headers before anything else.

FeedVaal

Definately headers. Your redoing the exhaust anyway so go all the way. You'll probably need to switch to an electric or manual choke.

SuperFast80

Can I suggest a big block? :reddevil

VolVette

Thanks everyone for your suggestions!

I think I will put some headers on while I am replacing the Y-pipe to the catylitic converter. And I think the Cam should come soon, too.

So, what type of headers do y'all suggest?

What type of Cam? ZZ4 Hot Cam???

Thanks,

Stephen

Alwyn678

I would go with a cam and a carb before adding headers for sure...You would get a better gain there also what is your ignition again

81VETTOM

if you have to run cats to be legal, then Random Tech are hi-flow and not restrictive. I use on mine, and it is a big difference, and legal where I am. Good luck

MasterDave

NOS..... :D 75 or 100 horse shot. You'll need to change nothing on your engine 'cept maybe a hi volume fuel pump. Not bad for under $500. :cool:

ylose

-dynomax ceramic coated headers...cheap and good. $210 from jegs. i love em.
-if you do put on headers do a cross-over since your redoing to duals....I just redid mine and I love the results.
-check out that carb...jump to 750 with electric choke. um...what intake are you running under there ?
-next cam its a little bigger job but well worth it.

a few pointers...take em or leave em...hehe.
my web page has what I just did to mine to boost its power.
-J


[Modified by ylose, 9:13 AM 12/21/2001]

72Shark

Dynomax Ceramacoated Headers!! Got 'em on my '72 and they really woke up my car. Sounds really cool now too. But get the aluminum "dead soft" gaskets for both ends of the header (tubes and collector), I have had no leaks since my original install. Big bonus---the headers look almost like chrome!

79er

Headers would be my first chose then the cam or both is a good answer to.
BTW a company named NOS could help you out to. :lol: