69 Z, Headers, VS Stock Manifold and Chambered

[NEW]

Hi,,
Basically what you people are saying is ::

72/73 jets front, 76- secondary,
timing 38-42, light springs,
carb light springs.
I∆ll try sometime during christmas or slightly in to the new year..

But back to the Chambered, good, or acceptable or just nice sound?

Smog system, anyone had trouble with this?,


THANKS Great info......

NEWs [img]/ubbthreads/images/icons/smile.gif[/img] [img]/ubbthreads/images/icons/grin.gif[/img]

[COPO PETE]

Chambered ain't bad, maybe Rob will chime in since he changed his. It is one of the best sounding though! I honestly think to get the best seat of the pants improvemnet is to put a M20 in it. With the M21 you will ring out first gear till your going about 50 MPH. With a M20, you will think you have woke up about 50 horse. I'll put my reputation on that!!!!...what ever my reputation is! [img]/ubbthreads/images/icons/confused.gif[/img]
Peter

[Chevy454]

Well, since you asked, Pete:

Factory chambered = Crap

It all depends on what your are going after. Nothing beats the sound of chambered, but the factory system is restrictive...and I mean WAY RESTRICTIVE! Flowmaster offers a 2.5" mandrel system which uses it's own "interpretation" of a transverse muffler, or Dynomax sells a really good transverse muffler that looks fairly close to stock and flows really well, but you'll have to bend the rest of the system yourself. BUT, if I was gonna put exhaust on something that won't be submitted to a tech inspection(!), I would buy the chambered system they offer for the new Camaros/Firebirds. The system is mandrel bent, but is a LOT bigger than the original chambered of the '60s. It supposedly adds power to the late model F-bodys, and is supposed to sound AWESOME, so it must be pretty good, because those late model guys won't buy ANYTHING without seeing what it did on a chassis dyno. That, to me, would be the best of both worlds: the sound and look of chambered, but built using today's technology.

As for tips for your Z-28...I have no idea about tuning it, but don't be afraid to REV THE PISS OUT OF IT! Don't worry, your ET's will thank you for it!

[NEW]

Hi,

In Norway they are very easy to deal with concerning tech inspections on cars older than 71. So i dont have to really worry abt. what i am doing concerning sound, etc..

The engine sound really nice and everything, but it is missing something, it could be that it is breathing to little.. Since it is an original car, and every thing is kept original i am really just not sure what to do..

But i think the exhaust, and the smog system does some strange things to it,,, I∆m not really sure, cause i havent run a 302 in any other form than this,

NEWs
thanks for the help, and if anyone else has any opinions........HIT ME [img]/ubbthreads/images/icons/smile.gif[/img]

[Keith Tedford]

The factory chambered exhaust has always had a reputation for being restrictive. If you drive on the highway much, the noise will quickly become annoying. I've run my spare M20 behind our L78 while having the original M21 rebuilt. Even with that engine I prefer the M20, especially in the city. What really helps a 302 to be drivable around town is the L79 cam.