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105864 Posts in 12354 Topics by 4762 Members
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616  Camaro Research Group Discussion / Maintenance / Re: 750 CFM Edlebrock on: November 06, 2006, 04:14:17 PM
What are the throttle bore diameters for the 600 and the 750? The larger the bore, the more air which the carb can flow. The trade off is that that same larger diameter bore will result in slower air velocity (speed). Thus it takes more time for the mixture to go from carb to cylinder. This is where throttle response can suffer. Air speed is why a carb is a 4 small barrels, not 1 large barrel. If your house has a ceiling fan in the attic, you can demonstrate to yourself the air speed effect of different size openings. Close all the windows in the house except one, and open this window slightly while turning on the ceiling fan. Feel the incoming air moving thru the opening and then open the window further and feel the speed of the incoming air decrease as the opening size increases.

Jimmy V.
617  Camaro Research Group Discussion / Maintenance / Re: Fuel Lead Additive on: November 03, 2006, 12:24:47 PM
I agree that additive is not required. Have 69 Z with 11:1 pistons, and have not had problems running unleaded premium. No valve problems after 24 years and 16,000 miles.

Jimmy V.
618  Camaro Research Group Discussion / Originality / Re: AD or YH wheels on: November 03, 2006, 12:18:32 PM
My car has Vinyl Top, and has been re-painted once, so I don't think I'm a good reference.

Jimmy V.
619  Camaro Research Group Discussion / Originality / Re: AD or YH wheels on: November 02, 2006, 09:07:25 AM
Factory installed "short" spoiler. Norwood car. Car sits now about 5 miles from site of Norwood plant where it was built in 1968

Jimmy V.
620  Camaro Research Group Discussion / General Discussion / Re: Car show judging on: October 31, 2006, 03:12:46 PM
69RSZ,

Nice looking engine. It's a winner in my book.

Jimmy V.
621  Camaro Research Group Discussion / Originality / Re: AD or YH wheels on: October 30, 2006, 12:07:34 PM
My Oct 68 built Z is missing the original AD Wheels; I figure finding a set to match my car would be like finding a needle in a haystack!
They would probably be manuf in Sept 68, and on or about the same date. I currently have a set of  14x7 YJ wheels on the car, and 4 of the 5 have identical manuf date. (spare was different) Story is wheels were traded by original owner with another Camaro owner. Makes sense.

Jimmy V.

622  Camaro Research Group Discussion / General Discussion / Re: Car show judging on: October 30, 2006, 11:50:11 AM
Car shows..... I have a real 69 Z/28, and every car show I've been to seems always have an "original" 69 COPO 427 or a pace car.
They'll win every time over a measly 69 Z.  Having been around in 69, I know how unusual Z's were to see. You'd seem them from time to time, but they were rare enough that you usually would remember them. I don't know if I ever saw a 67 Z back then; With a total production of 600 something, it isn't likely. I do remember seeing one 69 Firebird Trans Am when it was new back in 69 (production 600 something); it was white/blue with spoilers and fender flares, etc. I have never seen another one since, even at car shows. Yet it seems every car show these days has COPO's, Yenko's, ZL-1's etc. How'd that happen?

Jimmy V.
623  Camaro Research Group Discussion / General Discussion / Re: Crossram and exhaust manifolds anyone????? on: October 29, 2006, 03:44:53 PM
I'd be curious as to torque/HP at off idle to 3000 RPM range. This is where you will live on the street. I have owned a car that has to be revved up to get usable torque to pull off the line, and it's not much fun to drive on the street.

Jimmy V.
624  Camaro Research Group Discussion / General Discussion / Re: Crossram and exhaust manifolds anyone????? on: October 16, 2006, 03:44:44 PM
I've always read that this is a high RPM setup only; NOT recommended for street driving; If y the car is for street driving I'd steer away from the crossram.

Jimmy V.
625  Camaro Research Group Discussion / Decoding/Numbers / Re: 1969 Z/28 Holley 4053 DZ questions on: October 04, 2006, 11:24:53 AM
My 10B, Oct '68, build date Z has a caburetor mfg date of 872; a lot closer to 8 weeks than 2.

Jimmy V

626  Camaro Research Group Discussion / Restoration / Re: Best way to preserve the build sheet? on: September 22, 2006, 09:42:26 AM
When you found the build sheet above the gas tank, did you take out the tank, or can you tell if it is there without removing the tank?
I'd just like to try to check out my car. It's probably not there, but it would be fun to check if I don't have to remove the tank.

Jimmy V
627  Camaro Research Group Discussion / Decoding/Numbers / Re: Fuel pump codes on: September 21, 2006, 03:33:21 PM
After a Photoshop lesson, I believe I can post a pic of fuel pump.

Jimmy V
628  Camaro Research Group Discussion / Decoding/Numbers / Re: Fuel pump codes on: September 18, 2006, 09:03:31 AM
Thanks for the info; It does have the AC logo on both sides,  I do own a 69 Z/28 and this pump was on the car when I bought it; How would I post pic's, and what file size is appropriate? Pic's I have are approx 1.2 Meg. Lower resolution needed?

Jimmy V
629  Camaro Research Group Discussion / Decoding/Numbers / Fuel pump codes on: September 15, 2006, 01:52:04 PM
I have what I believe is a 69 AC fuel pump. It has what appears to be "HH40669" stamped on the mounting flange of the pump. Can anyone decode this?

Jimmy V
630  Camaro Research Group Discussion / Originality / Re: Cylinder head #3947041 on: September 15, 2006, 01:47:08 PM
Oops! My bad; I meant 3927186. I'm confusing with block casting no.

Jimmy V
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