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112111 Posts in 12879 Topics by 4931 Members
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3091  Model Specific Discussions / Trans-Am Camaros / Re: 302 Chevy engine building articles [late '60 - early '70s] on: May 06, 2011, 10:03:46 AM
There were many companies and shops that ported heads back in the day. Some may not know it
but Crane Cams offered fully competitive ported heads directly from their catalog. These were called
"Super Port Flow" heads and were also known as "Fireball" heads. They featured round exhaust ports
like most professional porting shops were doing back then. I have an original set of these Crane heads
I'm using on my '67 race car.

These pages are from the '67 Crane Cams catalog.

3092  Model Specific Discussions / Trans-Am Camaros / Re: Interview with Gary Morgan, Trans-Am racer on: May 05, 2011, 09:06:16 PM
Here's a cross ram air cleaner base fabricated by Gary's dad and some original cross ram air filters.

3093  Model Specific Discussions / Trans-Am Camaros / Re: Scattershields on: May 05, 2011, 08:57:08 PM
1967 Lakewood ad for Camaro. Oddly, the photo is not a Camaro scattershield. Looks like one for a Chevy II/Nova.

3094  Model Specific Discussions / Trans-Am Camaros / Re: Wheels used on Trans-Am Camaros on: May 05, 2011, 08:51:49 PM
I did not have any luck finding a Trans-Am Camaro with Cragars on it but here are a couple of photos of Ron Grable's
Dart, which did use them. Also, the Bob Barker '67 Mustang used them.

3095  Model Specific Discussions / Trans-Am Camaros / Re: Street weight vs racing weight on: May 05, 2011, 05:45:47 PM
I guess you could say some people/teams scrutinized the rule book a little more carefully than others.  Cheesy
3096  Model Specific Discussions / Trans-Am Camaros / Re: Engine photos on: May 05, 2011, 05:42:35 PM
Hey Bruce, thanks for posting the photo of the Titus engine. I'm kind of curious how the TG team was able to use that manifold and carburetor set-up. Was that something Pontiac had homologated on the proper SCCA forms or did the tech inspectors "look the other way" for that particular race? I assume they wanted to run this for a top-end boost and see how it performed against the Boss 302, which was also biased more toward top-end power rather than mid-range. Have you spoken with Dave Billes about this set-up?
3097  Model Specific Discussions / Trans-Am Camaros / Re: Street weight vs racing weight on: May 05, 2011, 11:04:33 AM
The weight of a street Z is going to vary depending on year and options. A guess for a '69 street Z would be around 3150-3200lbs.  In the SCCA rule book, the minimum weight for the 1968 racing year for all pony cars was set at 2800lbs, less fuel and driver. For the 1969 racing year, it was bumped up to a minimum weight of 2900lbs, less fuel and driver. For the years 1970-1972, the minimum legal weight was changed to 3200lbs with fuel or 3400lbs with fuel and driver. The 1967 racing year did not give a specific minimum weight but was supposed to be 350lbs less than the "homologated" weight. The homologated weight is what the factory told the SCCA what a typical Camaro (or Mustang, Cougar, etc...) weighed in stock form. Of course, they were not required to prove what that weight was so they all lied and came up with lighter than typical weights. A '67 car could have and probably would have raced under the 2800lb minimum established for the '68 season. The establishment of a standard minimum weight for all Trans-Am cars came as a result of what happened the previous year. Does that answer your question?
3098  Model Specific Discussions / Trans-Am Camaros / Re: Rear axle on: May 04, 2011, 10:53:15 AM
Chevrolet Engineering was well aware of the limits of their rear axle spring perches in performance applications.
Below is the Engineering Service Letter which shows what they recommended as a fix. Always use u-bolts to
help keep the axle firmly attached to the spring, preferably two per side on a race car. Increasing the diameter
of the u-bolts is a good idea too.

3099  Model Specific Discussions / Trans-Am Camaros / Re: Recommended Reading on: May 04, 2011, 07:21:15 AM
Mike,  Dan has got it finished and has submitted it to the editor so that part's done. Barring unforseen circumstances, it should be out at the time he indicated. Dan's got a passion for the cars and their history. I'm sure it will be well done and I am looking forward to it.
3100  Model Specific Discussions / Trans-Am Camaros / Re: Engine photos on: May 03, 2011, 09:56:04 PM
Guldstrand's car was not a Z-28, it was an SS350 pulled off the lot at Dana Chevrolet and made into
a pseudo Z-28 with the replacement of the 350 with a Traco-built 302, a flat hood and a pair of Z
stripes. It was a manual disc brake car originally and Guldstrand preferred that over the power
assisted brakes.

I'm seeing the outline of a curved piece of metal under the duct tape on the upper radiator hose of
Guldstrand's car. Unfortunately the Penske engine compartment photo is a little too grainy to fully
see what else may be on the upper hose besides duct tape but that's as good an image as I have.
3101  Model Specific Discussions / Trans-Am Camaros / Re: Engine photos on: May 03, 2011, 02:11:54 PM
Photo of the Penske Camaro's engine compartment, taken at Marlboro, MD, August 12, 1967.
This race was the first victory for the Camaro on the Trans-Am circuit. Mark Donohue and Craig
Fisher co-drove the car for this race. Notice the Bill Thomas/Douglass headers, painted yellow.

Photo by Andrew Keller
3102  Model Specific Discussions / Trans-Am Camaros / Re: Original T/A racing photographs, late 60's & early 70's on: May 03, 2011, 02:00:09 PM
Mark Donohue in the #6 and Bob Stevens in the #19 at the Kent (Washington) Trans-Am, October 6, 1968.

3103  Model Specific Discussions / Trans-Am Camaros / Re: Recommended Reading on: May 03, 2011, 08:10:23 AM
Dan Lipetz of the Historic Trans-Am race group tells me his new book about the Trans-Am series is due to come out this fall, possibly as early as late August. More good reading to look forward to.
3104  Model Specific Discussions / Trans-Am Camaros / Re: Early Traco Water Pump Pulley on: May 02, 2011, 06:02:13 PM
Wow, Chad. That is a seriously cool piece with several details that most people would never catch. Thanks a lot for posting it.
3105  Model Specific Discussions / Trans-Am Camaros / Rear axle on: May 02, 2011, 02:43:21 PM
Here's an article from 1968 showing one method of how they beefed up rear spring perches on the axle back then.
No matter if you're road racing or drag racing, this is a wise thing to do because the factory welds in this area are
only suitable for going back and forth to the grocery store.

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