Steve's Camaro Parts

Steve's Camaro Parts

Monday, March 12, 2012

Steve's Camaro Parts - How Many 1967 Pace Cars? (by Greg McCann)

How Many 1967 Pace Cars?by Greg McGann



If you read almost any book or article on the 1967 Pace Car, you will usually see the number of cars quoted as 103. I personally believe that there were at least 200 built, and maybe over 600 more built, although I have not heard of anyone else with this opinion. Let me set out my reasoning for you and let's see if we can add up the cars.
The number of Camaros used at Indy comes from a GM interoffice memo detailing the specifications for the vehicles to be used at the race. Here are some excerpts from that memo. (Use your "back" button to return here.) Let's add up the numbers.
First we have the 500 Festival Committee Vehicles, of which 43 are Camaros, numbers 1-43. The Speedway Vehicles include 10 Camaros, numbers 49-58, and 3 actual Pace Cars, numbers 78-80. Many sources will give the number of actual Pace Cars as 2, but there were 3 - number 78, number 79, and number 80. They were identically prepared, with one designated to pace the race, one for backup, and the third, with a show quality finish, to be presented to the winner. The specifications for the 3 actual pace cars were set forth in Engineering Build Order #98168. (Use your "back" button to return here.) Then we have the 40 "Brass Hat" cars, of which 25 were Camaros. This equals 81 Camaro Pace Cars and replicas that were used at Indianapolis. These cars were later sold through Indianapolis dealerships as used cars. Some were purchased by the person the car had been assigned to during the month at Indy for the regular GM Corporate discount price.
After the race was over, many of our friends in the Great White North learned of the Pace Car Replicas and weren't happy to have been excluded from the promotion, and they apparently knew who to complain to. Chevy ordered up 21 more cars under ordering code 80055, eleven 396-325HP Turbo 400's and ten 350 Powerglides. These were distributed to Canadian dealers who remain unknown. This makes 102 cars total.
A.J. Foyt won the '67 Indy 500, but he turned down the car because it didn't have air conditioning or a power top. So Chevrolet decided to build another car for A.J., and it was produced in the same run of cars as the special Canadian-built cars. Because they were all produced together, they all got the special clear coat paint and the 0-1 code. In addition, they were all built after the race, date code 06C. This brings our total to 103.
This number is what is usually quoted as the total number of 1967 Pace Cars, because this number can be verified (more or less) from Chevrolet memos. Okay, so if this number can be verified, why does every source say it is approximate? Once we start digging further, and making guesses as to the number of additional cars, it's all pretty much speculation - and the numbers point to many more cars, not less.
First of all, let's look at the build dates. The U.S. Camaro Club has published articles that say all Pace Cars were built between 03C and 04D, except for the Canadian Pace Cars built 06C. John Hooper, in the 1967-68 Camaro Reference Book, gives the dates as 03C to 06B, and the Canadian cars also as 06C. Other sources give pretty much the same dates. (The USCC gives 06D in one article, but it's obviously a typo.)
The Chevrolet memo setting out the specifications for the cars set the deadline for the Indy cars as March 30, with formal delivery on April 1. Therefore, all 81 Camaros used at Indy were built prior to the end of March, 03D. The Canadian vehicles were built the third week of June, 06C, so no matter which build dates you use they all point to some cars being built after 03D, either through April, 04D, or June, 06B. The question is, how many?
John Hooper breaks down the build dates by assembly plant. He indicates that Norwood built pace cars from 04A to 06B, and Van Nuys built them from 04A to 05D. According to Hooper, all L181A coded Los Angeles cars were built during this period, which means none of them could have been used at Indy.
So where did these extra cars go? Chevrolet ran a special "Pacesetter" campaign to mark the selection of the Camaro for Indy. Some sources say this only included incentives on options, and not Pace Car replicas. The text of the news release doesn't really make this clear. It reads as follows:

For Release: IMMEDIATELY
(4878)

"DETROIT -- Chevrolet and its dealers are launching a nationwide Camaro Pacesetter sales campaign this month to mark the selection of the Camaro as pace car for this year's Indianapolis 500 race on Memorial Day.
"The campaign, running through June, will feature specially equipped Camaros and Fleetside pickup trucks at special savings. There will be special advertising support in the various media, including large newspaper ads, network television and radio plus spot radio and TV and dealer merchandising and promotional material.
"During the Pacesetter event, Camaro buyers can get the special hood stripe and floor-mounted shift for three-speed transmission at no extra cost with special savings also available on Powerglide automatic transmission, power steering and power brakes.
"Also offered is a half-ton Fleetside pickup truck with special savings when equipped with some of the most popular options and accessories. These include custom apperance items, pushbutton radio, a larger capacity six-cylinder engine and heavy-duty suspension.
"4 -- 10 -- 67"

This memo is not very clear. It does give incentives on options which you could order on your Camaro, but it also implies that there were "specially equipped" Camaros also at the dealer. These would have been the Pace Car replicas. According to John Hooper, dealers received these cars as a special sales promotion and they were all built at Los Angeles. However, any Norwood production after 03D would have to be included in the promotion.
When Chevy built the Z10 Pace Car Coupe as a special regional promotion in 1969, it is believed they built between 200 and 300 at Norwood. You would expect Chevy to build more cars for a nationwide promotion, but then again, they didn't try to sell as many '67's either. You can make a good case for at least 100 extra pace cars from this alone.
Since Chevy built all these cars for promotion, as opposed to letting the customer order them as they did in 1969, it would be reasonable to assume that they built these cars according to some kind of a schedule to meet deadlines and shipping dates. If Chevrolet built 81 cars in Norwood during the last two weeks of March - about 40 per week - and 22 cars in Los Angeles during the third week of June, then mightn't they have also averaged at least 20 cars per week through April (04D) for an extra 80 cars? And maybe even an additional six weeks' production through the second week of June (06B) for another 120 cars? That would equal around 200 cars in addition to the 103, making 303 total.
And this ignores the fact that two assembly plants were running, and Norwood produced over twice as many cars as Los Angeles did. If John Hooper's facts are correct, then Norwood produced pace cars for the 10 weeks from 04A to 06B - 400 cars at 40 cars per week - and Los Angeles for the 8 weeks from 04A to 05D - 160 cars at 20 cars per week - then we are looking at 560 extra cars, plus the 81 Indy cars built in March and the 21 Canadian cars and the one for A.J. Foyt built in June, for a total of 663! That's a long way from 103.
Thanks to the U.S. Camaro Club, there is one more indicator to look at. The USCC has a registry for Camaros, which amounts to a large database of information. From this they can extrapolate statistical data on these cars. As of July, 1992, in their special Pace Car issue of the magazine, they had 98 pace cars registered. What are the odds on having virtually every single Pace Car replica, 98 out of 103, still around? Not only are they in existence, but also owned by members of the USCC, and also registered with the USCC! I'd say it's highly unlikely.
There were 3,675 Pace Car Replicas sold in 1969, not counting the actual Indy cars and the Z10's, yet the USCC had only 103 registered in 1992 - roughly 2.5% of all pace cars made. It's not likely that they would get over 95% of the '67's and only 2.5% of the '69's. If you take the build date end of 04D, for an extra 80 cars, that's still 53% of the total, still very high. A build date end of 06B, for an extra 200 cars total, would still leave around 32% of the cars still around and on the registry, which still seems high. The highest estimate, 663 cars total, would leave 14%. This is starting to sound a lot more realistic.
Finally, of the 98 cars registered, only 8 were built in March, so only 8 of these 98 could be part of the 81 Indy cars. That leaves 90 cars which couldn't have been used at Indy. They have all 21 Canadian cars registered, so that is at least 69 extra cars if they have every one in existence registered!

So there is the dilemma. My best guess is about 200 - 400 cars total, but my opinion isn't cast in stone. If you have another guess, or any other information, please email me.
New Information!
I spoke with Matt Murphy of SLP Engineering at the US Camaro Club Nationals this July. He has gathered a lot of information about the 1967 Pace Cars, and his father worked at Dan Young Chevrolet in Indianapolis where the actual festival cars were prepared. He shed some light on many questions which puzzled me, and he agrees that the number of cars and replicas is probably over 350.
To begin with, although the deadline for delivery of the Festival cars was April 1, the cars continued to be delivered through May 1, 1967. He also gives the total number of Festival cars used at Indy as 110 because more Camaros were being assigned to VIPs and they needed more than the original number. If you add these 110 cars with the 21 Canadian cars we get 131.
There were also "dealer cars," the Pace Car Replicas I specualted as being at the dealer during the Pacesetter sale. According to Matt, the way the system worked was that the people in charge of these promotions would get on the phone to their best dealers and let them know there was a special promotion coming. In this case, the dealers were informed of the Pace Car Replicas and given a chance to order them during the winter of '67. The ratio of Dealer cars to Festival cars is about 2:1, so this points to about 220 Dealer cars, for a total of around 330.
Once the Pacesetter campaign was underway many dealers tried to order more cars, and many dealers who hadn't ordered any tried to get a few. The factory, however, was not interested in building any more cars, so the dealers had to come up with their own. They ordered white SS/RS 396 and 350 convertibles with blue tops and stripe delete. Then they painted the blue nose stripe at the dealership and ordered the door decals through their parts departments. There are also dealers who skipped the stripe delete option and just repainted the nose stripe. These would be considered genuine Pace Car Replicas, since the only changes made by the dealer were the color of the nose stripe and the decals, unlike the 69 cars, where there was a factory x-code on the trim tag.
How many dealer-duplicated Pace Cars is a matter of speculation, but figure at least 20 or 30. That puts the total number in the 350 range, and it is perhaps much higher.
This article originally appeared on The Camaro Homepage.


source: www.camaro-untoldsecrets.com
by:  Greg McCann



Sunday, March 11, 2012

Steve's Camaro Parts - Four Wheel Disc Brakes (by Wayne D. Guinn)

Special intent and high intrigue make this Camaro performance option one of the most impressive on the list.
Camaro enthusiasts tend to agree, the four wheel disc brake system remains one of the most popular, impressive, and highly prized high performance options available for the first generation Camaro...

MOST UNCOMMON....
Unlike today, in 1969, Corvette was the only mass produced American car to use four wheel disc brake technology which made the concept new and exotic. Needless to say, when the four wheel disc brake system became available on the 1969 Camaro as regular production option- RPO JL8, it was a remarkable occasion!

SPECIAL INTENT...
Prior to its' release as a regular production option, the four wheel disc brake system was available "over the counter" through the Chevrolet parts department as a "Heavy Duty Service" option beginning March of 1968 (see Photo below).



Photo above shows service package disc brake rear axle on 1968 Camaro Z/28..

This in itself is significant, although somewhat ambiguous, the term "Heavy Duty Service" was Chevrolets catch all phrase meaning: "intended for racing". Factory production and availability of this optional equipment at the consumer level was actually a secondary consideration. Chevrolets primary objective was to develop an advanced brake technology for the PENSKE/SUNOCO TRANS-AM race team in effort to make the Camaro a more formidable competitor on the road race circuit.
Production for the general public was actually the result of a concession made by Chevrolet to satisfy the FIA/SCCA rule which stated, that all optional equipment used on the SCCA sanctioned race cars must be made available to the public in specified quantities. Therefore, to comply with the rule and keep Chevrolet's cost down, the four wheel disc brake system became a "limited production" service option.The spin off benefit of this race bred technology was that it was now destined for the average Camaro owner, who due to a special set of circumstances would now be able to "upgrade" his 1967-68 Camaro using factory "racing" equipment. So, upgrade they did, and why not? After all, it was listed as optional service equipment, developed specifically for the Camaro, available through Chevrolet and therefore "correct" AND legal to do so... then and now, just as Chevrolet it intended it to be!

JL8 Front system JL8 Rear system


This 1969 Camaro Z28 shows one of the best examples of a correct and well detailed RPO JL8 system...




OPTIONS WITHIN OPTIONS...
Until the introduction of the 1969 model, Camaro owners were limited to upgrading their brake systems by using the Heavy Duty Service Package. Things changed dramatically with advent of the 1969 Camaro and the introduction of the RPO JL8 four wheel disc brake package. The Camaro owner now had the option to order his 1969 Camaro with four wheel disc brakes (RPO JL8) installed at the factory or with base equipment and later upgrade to four wheel disc brakes using the HD Service Package.
Shown below is the "basic" HD service package disc brake rear axle housing assembly. Note the Corvette caliper adapter/park brake assembly's...
Taking it a step further... If he ordered the optional JL8 equipment on his 1969 Camaro, he then had the additional option to further upgrade the system by substituting the heavy duty rear axle from the previously released HD Service Package in place of the JL8 rear axle. The advantage in this being; the HD Service Package axle uses larger diameter axle shafts and bearings which significantly improve durability, a factor especially important in racing. Anyway you went, it was a win-win situation with this limited production performance equipment.

JUST HOW LIMITED?....
Unfortunately, there is no official number that accurately reflects the total production figure of the Camaro Heavy Duty four wheel disc brake Service Packages. These packages were made in short "off line" batches and not well documented.


The 1969 RPO JL8 on the other hand enjoys one of the lowest production figures of all 1969 Camaro options because of its "inherent" limited production and availability during the 1969 model year. Officially, Chevrolet submitted an "arbitrary" production figure of 206 units. This figure however, may have been intentionally inflated in order to satisfy the FIA/SCCA minimum requirement when filling out registration forms for homologation of the Camaro and its optional equipment with the FIA/SCCA sanctioning committes.
1969 RPO JL8 QX Coded disc brake rear axle assembly. Code indicates this is a 3.73:1 ratio, Built May 14, 1969.

Of the assumed 206 takers, most were thought to be some where between serious road racers and the occasional amateur weekend racer who appreciated state of the art high performance components. The JL8 option was canceled 7-16-69, short of a full years run and was frequently unavailable due to infrequent batch runs of production pieces, more specifically the rear axle assemblies.

RPO JL8 AVAILABILITY AND COST...
RPO JL8 was available on all Camaro models and was considered to be a "high dollar" option, ranging from $500.30-$623.50 depending on the model it was ordered with. The relatively high cost of the option may have been prohibitive for some and may also have been a contributing factor in keeping the total sales figure low.In contrast... Current research shows that a fully documented Camaro with the factory equipped RPO JL8 option will sell now for $10-15K over a comparable Camaro without the JL8 option!

WORTH IT?....
A question not easily answered. However, in an attempt to find an answer, lets first understand what influences price. SUPPLY AND DEMAND! Supply we already know is extremely low and demand is extremely high. Why?.. The low production figure intrigues many collectors as do the esthetics. The presence of the four wheel discs on the early Camaro tends to have a drop dead, heart stopping effect on those who see it! Enticement may also come from the more obscure and esoteric legend and lore associated with the race bred heritage, leading us to the more practical part of this quotient, performance!

KILLER PERFORMANCE!....
Performance of the four wheel disc brake system is subject to and contingent upon its level of preparation. Much like the blueprinting of an engine, the careful selection of components along with their proper set up and maintenance, all have an effect on the level of performance. A properly prepared system such as Penske used in the '68 and '69 seasons were and still are extremely competitive systems capable of stopping a relatively heavy "sedan" repeatedly with out failure in extreme racing conditions.
What the four wheel disc brake system was capable of performance wise as it left Chevrolet was the subject of a few period magazine tests, two of which were, CAR LIFE, August 1969 (RPO JL8), and CAR AND DRIVER, July 1968 (HD SERVICE PACKAGE). Briefly, the four wheel disc brake system was shown to be a marked improvement over the RPO J52 (power asst. frt. disc/rear drum) not only in the area of stopping distances but also in terms of resistance to fade. It should be remembered however, that each JL8-Service package equipped car is unique having its own individual built in characteristic differences due to variances between equipment, weight and distribution factors. Therefore, brake performance will also vary between vehicles.The tests that were conducted by the magazines were light weight compared to the first "Durability and Effectiveness" test of the four wheel disc brake system conducted at Chevrolet's proving grounds.On 10-30-67, Gib Hufstader, as engineer in charge of development, requisitioned an engineering test on an all disc system he put together on a 1968 Z/28 Camaro. The system used the Corvette HD J56 calipers front and rear, no proportioning valve, dust shields, scoops or deflectors. Test conditions were pretty severe, they ran a "Sebring Schedule" requiring the driver to brake at a steady 25 FPSS on the decelerometer from 145 MPH to 45 MPH at one mile intervals for four hours!Not only did they hold up but at brake point 131 the driver notes "They seem to be the same as at the start". Again, at brake point 145 driver notes "Very easy to hold pedal, it's capable of more deceleration". Finally at brake point 299 they begin to fade slightly and at the end of four hours had completed 318 repetitive applications from 145 MPH to 45 MPH and were still capable of 25 FPSS on the decelerometer!
BRAKE SPECIFICATION COMPARATOR


CONSTITUENT: SERVICE/JL8 '67 RPO J52
POWER ASSIST YES YES
FRT. ROTOR DIA. X WIDTH 11.75" X 1.25" 11" X 1"
RR. ROTOR DIA. X WIDTH 11.75" X 1.25" N/A
RR. DRUM DIA. N/A 9.5"
RR. LINING WIDTH N/A 2.0"
TOTAL SWEPT AREA 461.2" 332.4"

THE FINAL RESULT...
As it turned out, the four wheel disc brake system is recognized as being one of the largest contributing factors responsible for establishing the Camaro as the 1968 and 1969 TRANS-AM champion and forever into the hearts and minds of Camaro enthusiasts...



Tags: camaro part, camaro parts, Camaro restoration parts, 69 camaro, 1969 camaro, aftermarket camero parts, chevrolet camaro, ss, z28, rs, chevrolet, restoration, 68 camaro, chevy, 67, 69, f-body, camaro, chevy camaro, chevrolet camaro, gm, z-28, 350, ls1, z/28, pace car, camaro ss, 69 camaro, first generation, copo, fbody, yenko, 67 camaro, 68 camaro, musclecar 

source: www.camaro-untoldsecrets.com
by:  Wayne D. Guinn


Saturday, March 10, 2012

Steve's Camaro Parts - 1969 Camaro Super Scoop

1969 CAMARO "SUPER SCOOP"


RPO ZL2 - SPECIAL DUCTED HOOD: RACE-BRED TECHNOLOGY
by Wayne D. Guinn

An insider's look at the development of the Cowl Induction hood by the author of
"Camaro - Untold Secrets"

The hood dubbed "Super Scoop" by Chevrolet was designed specifically to be a functional piece of high-performance equipment. The intention was to increase overall horsepower by delivering cold fresh air to the induction system. Not only did it effectively accomplish its primary objective, but its stylistic beauty greatly contributed to the mark resulting in the classic appearance of the 1969 Camaro equipped with the "Cowl Induction" hood.

THE COLD AIR THEORY

The principle of utilizing cold air induction was nothing new at Chevrolet. It was used in racing as far back as 1963 on the Chevrolet Z11 stock cars running on the NASCAR circuit and again with the "Plenum Air Intake" released as a special service option for the race-oriented 1968 Z/28s. Rather than using a raised hood panel like the 1969 RPO ZL2 option, the first two designs drafted cold air from the base of the windshield under the hood via a special air cleaner and duct, much like the NASCAR racers of today.

Chevy engineer Doug Roe, who worked with Product Promotions chief Vince Piggins, found a dramatic performance gain by taking the cool dense air at the high pressure area near the base of the windshield. Ducting pressurized fresh cold air from this area to the carburetor creates a more dense fuel charge with increased volumetric efficiency resulting in more horsepower An approximate 1% horsepower increase is gained for every 11 degree drop in temperature providing the mixture is adjusted accordingly. That means if your engine has a gross horsepower rating of 350, a drop of 43 degrees would net you an additional horsepower increase of 4%, equal to 14 hp, for a total of 364 hp. These gains are typical, since under hood temperatures in normal conditions are relatively hot, and under racing conditional even hotter. Therefore, given the temperature differential of under hood and outside the hood along with pressurized unrestricted air flow, it is not unreasonable to expect this type of power gain at the upper levels of engine performance.

The reverse drafting method used on the special ZL2 hood was chosen over forward facing scoops which create greater pressures and increased ram effect but have problems associated with air turbulence at the carburetor air horn. Turbulence causes uneven pressures within the metering bodies and upsets correct air/fuel ratio and delivery. Correcting this type of system is involved and not worth the insignificant power increase the additional pressure affords.




Larry Shinoda, of Chevrolet's design group, began development of the hood system approximately May 1967. That primary aim of the system was to give advantage to the TRANS-AM competing Camaro Z/28s. Although the hood was fully developed and ready much earlier, the concept reached the production level for the 1969 model year.

The delay can be indirectly attributed to the SPORTS CAR CLUB of AMERICA (SCCA). Chevrolet held back the special hood production until it could be homologated into the SCCA TRANS-AM events. It wasn't until the 1969 racing season that the SCCA loosened up and allowed hood scoops, stipulating that they must be of "modest" design and in no way interfere with driver vision. The 1969 SCCA recognition forms filed by Chevrolet included the RPO ZL2 single four barrel "steel hood" in order to satisfy the minimum production number of 1,000 units necessary to utilize these parts in the racing series. Chevrolet then qualified the rare counter part fiberglass 2x4 hood as optional heavy-duty equipment for use in the series. It was strictly a matter of economics that led Chevrolet to produce and homologate the steel hood even though it was their intention to use the fiberglass hood in the racing series.




As you can see, the folks at Chevrolet were masters at SCCA rule bending and/or interpretation -especially when it came to economics and gaining advantage in competition. Consequently, an extremely LIMITED production of fiberglass hoods were sold in stark contrast to the unlimited production run of 1969 RPO ZL2 "Special Ducted Hoods", which sold an amazing 10,026 units due to their overwhelming popularity. There is no doubt that the TRANS-AM race car's appearance with the hood had an impact on the buyer.




The fiberglass hood was costly to produce. If the SCCA were to hold Chevrolet to the 1,000-unit minimum production number and sales for the fiberglass hood were realistically targeted at a mere 100 units, the expense of production would be justification alone nor to produce the fiberglass hood. However since the steel counterpart was inexpensive to produce (relative to the fiberglass unit) the steel units would be easier to justify cost-wise as a Regular Production Option (RPO) with a sales potential of well over 1000 units. Because the steel hood and the fiberglass were of the same basic design and function, it would be easy to homologate the steel hood on the recognition form, and then offer the fiberglass hood as a "heavy-duty" service option allowing Chevrolet to produce only as many fiberglass hoods as they determined there was a need for.

 



FUNCTIONAL DESIGN


The RPO ZL2 system works by drafting air through the special ducted hood from an opening near the base of the windshield. The rear facing air intake is well-shrouded in an effort to smooth out excessive turbulence. An air valve is placed at the opening which is controlled by an electric solenoid and activated by a switch on the throttle arm. The valve opens when the throttle is approximately 90% depressed. With the valve open, cold air is directed though the hood's raised plenum chamber to a special air filter that seals to the hood and delivers the cold air to the carburetor.

















WHY AN AIR VALVE?

The air valve was specified fur use on the production RPO ZL2 option for the sake of better overall drivability. Taking into account the diversity of climatic conditions and their effects on the system, it was determined that the system should function only when called on. If the system remains open in extreme cold weather, icing of the carburetor could occur. The valve also affords longer air filter service life.


The cowl induction hood was and still is one of the most popular options offered for the first generation Camaro. The combination of its aggressive good looks and ability to lend additional power without engine alterations is truly amazing. Best of all is the sen sation derived by pressing your foot down, hearing the flap open with a unique roar of air rushing in and the whining gearbox in concert with that free-flowing tune of extra horsepower!

 


Tags: camaro part, camaro parts, Camaro restoration parts, 69 camaro, 1969 camaro, aftermarket camero parts, chevrolet camaro, ss, z28, rs, chevrolet, restoration, 68 camaro, chevy, 67, 69, f-body, camaro, chevy camaro, chevrolet camaro, gm, z-28, 350, ls1, z/28, pace car, camaro ss, 69 camaro, first generation, copo, fbody, yenko, 67 camaro, 68 camaro, musclecar 

source: www.camaro-untoldsecrets.com