69 Z, Headers, VS Stock Manifold and Chambered

[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.

[Salvatore]

Hi new member. Mostly all the things these guys have been telling you I think are right. The chambered exhaust is restrictive. A set of headers is a must for the little 302. Take the smog off and put it into the closet, for now. Put a good set of 2.5in. pipes on it with the cross flow pipe and low restrictor mufflers of your choice. You really do need the M20 with 4:10's or even 4:56's with a taller tire. These 302's have NO torque. I like running the timing around 40 to 42 total advance with the advancement coming in around 2500 rpm's. Jack Podell has a gas additive for 93 octane. You can get as much as 103 octane with the mixture. It is a REAL lead additive. 72 jets in front with 76's in the back sounds good. I don't run the power valve in the front because they are annoying. My car has no problem surging or pulling out. If you set the 30-30 cam a little tighter like 28-28 you can see that it does gain a little more torque with a tighter valve lash. 28in. tires in the back with a 4:10 and a 254 first gear will make your car very drivable and perform well. If you can't find the correct spring tension for your 780 holley you can always install a small nut and bolt in the carb linkage to enhance your secondaries to open quicker without the aid of vacuum. Make sure that your motor does have the correct compression ratio. At least a true 10:50 to 11:1. The smaller the motor the more this helps. Make sure your valve springs are good and REV it to death! Jack Podell is in Hemmings Motor News. Have fun! Sam

[Salvatore]

Tony Pizzi was great! That car flew. 11:68 with 7in. tires. NHRA kept factoring him to death, like they did to Bernie Agaman's 71 454 corvette. The both got out of stock and super stock racing because of that. Jenkins gets some credit for Pizzi running so well also.

[NEW]

Hi again,,

if you guys would like you could i think, if i do it right,
see the car here: www.newsgarage.com/inventory.html


NEWs
and again thanks [img]/ubbthreads/images/icons/smile.gif[/img]
And you know what, here in Norway we get 98 octane at the pump, so some additives easily gets us up to 102-104 octane