4232

Camaro Research Group Discussion / General Discussion / Re: 1969 rs z28 production #'s?

on: October 25, 2007, 11:06:54 AM

Sure, again, just for fun. Let’s look at 68 first: For 1968 there were 235,147 Camaros made, and of that number 40,977 were Rally Sports and 7199 Z/28s. The calculation is:
(40,977/235,147 * 7199/235,147) * 235,147 = 1254.
So, if the assumption is reasonable, a ballpark estimate of the number of 68 RS Z/28s made in 68 is 1,254. And please, please, please, remember this is just an estimate. These numbers based on a gross assumption. I’m sure there are plenty of people that would argue that our assumption is wrong. For example, I’m sure some people might say that the RS option was a “luxury” option and there would be far less ordered on Z/28s than on regular Camaros. Thanks 69 Z11! I know it's just an estimate, but it sounds alot better when I tell my friends my car is 1 out of 1254 built (compared to 1 out of 7199 built). Paul



4235

Camaro Research Group Discussion / Restoration / Re: 1969 z28 flywheel

on: October 24, 2007, 11:56:48 PM

I was just looking at Jerry's website. He has some facts on an original unmolested 1967 z28. The engine data is as follows: 3914678 CASTING DATE J97, ASSM DATE V1121MO. The flywheel data is as follows: 3791021, DATED K157. If I read this correctly the flywheel was cast a little over a month before the engine date stamp on the engine pad.
So, could some flywheels be original to the car but yet be cast up to a month earlier than the engine stamping date. 69er  The engine assembly date is November 21, 1967 and the flywheel cast date is November 15, 1967. The flywheel was cast six days before the engine was assembled. Paul



4245

Camaro Research Group Discussion / General Discussion / Re: 1969 rs z28 production #'s?

on: October 24, 2007, 12:01:02 AM

Let's say we have a big jar full of all the Camaros made in 1969 (243,085). We know that there are 20,302 Z/28's in there. If you could reach into the jar and pull out a Camaro, the odds that you would pull out a Z/28 are about 1 in 12 (20,302/243,085). To pull out a Rally Sport the odds are about 1 in 6 (37,773/243,085). These are valid statistics because the numbers are known. Now, just for fun, let's assume that the Rally Sport option IS equally distributed throughout all of the Camaros in the jar, i.e., a normal distribution. This is assuming that it's just as likely that any Camaro made would have the RS option. For example, this assumes that plain jane 6 cylinder Camaros were just as likely to get the RS option as a Z/28, or an SS, or a convertible, or any other 1969 Camaro. We know that's probably not true, but let's assume it is for now. So then, the probability of pulling out a Rally Sport Z/28 out of the jar is .013 (20,302/243,085 * 37,773/243,085) or about 1 in 77. So, using only one assumption (and it's a big one), we could guess that there would have been only about 3,160 Rally Sport Z/28s made in 1969 (0.13*243,085). If the assumption is not too far off from reality, a real RS Z/28 is fairly rare.
Cool 69 Z11! So, a 1968 Rally Sport Z/28 is even rarer and a 1967 Rally Sport Z/28 rarer than that! Any chance you could do the same statistical interpolations for RS Z/28s in the '68 and '67 models years? Paul




