CLASS RACER FORUM - View Single Post - 302 Z-28 engine only

nhramnl · 04-30-2018, 10:42 AM

Everything Greg says is correct. Some additional information: the shipped- in-the-trunk headers were made for Chevrolet by Stahl. The cross-ram setup was essentially un-drivable on the street. While extremely cool-looking, the setup was genuinely intended for road-racing and over-fueled the engine so terribly at anything up to about 4000 RPM that they were miserable to drive. You ended up with about a 2-second blast of acceleration in each gear, because the engine wouldn't clean up until it reached 4000 or more and then it would pull up to 7000 almost instantaneously. The production blocks in '69 were stamped DZ; the '69 engines had no oil fill tube (you added oil through the valve cover); they had finned aluminum valve covers with a crossed-flags emblem on one cover, "long-reach" water pumps, and crank pulleys, and deep-groove pulleys.

04-30-2018, 10:42 AM	#15
nhramnl Senior Member Join Date: Feb 2010 Posts: 507 Likes: 8 Liked 358 Times in 83 Posts	Re: 302 Z-28 engine only Everything Greg says is correct. Some additional information: the shipped- in-the-trunk headers were made for Chevrolet by Stahl. The cross-ram setup was essentially un-drivable on the street. While extremely cool-looking, the setup was genuinely intended for road-racing and over-fueled the engine so terribly at anything up to about 4000 RPM that they were miserable to drive. You ended up with about a 2-second blast of acceleration in each gear, because the engine wouldn't clean up until it reached 4000 or more and then it would pull up to 7000 almost instantaneously. The production blocks in '69 were stamped DZ; the '69 engines had no oil fill tube (you added oil through the valve cover); they had finned aluminum valve covers with a crossed-flags emblem on one cover, "long-reach" water pumps, and crank pulleys, and deep-groove pulleys.