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103843 Posts in 12195 Topics by 4705 Members
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2326  Model Specific Discussions / Trans-Am Camaros / Re: Firebird and the Trans-Am series on: October 02, 2011, 12:57:20 AM
Craig Fisher's Firebird at Riverside, October 1968.


Petersen Publishing photo


Petersen Publishing photo


Petersen Publishing photo


Petersen Publishing photo


Petersen Publishing photo
2327  Model Specific Discussions / Trans-Am Camaros / Re: Original T/A racing photographs, late 60's & early 70's on: October 02, 2011, 12:53:58 AM
June 1967 Mid-Ohio Trans-Am. George Follmer, standing in the driving suit with Firestone across
the back, is substituting for Mark Donohue who is driving at LeMans for the Ford team. Roger Penske
is crouched on the other side (red shirt) discussing the rear brakes with a crew member.


Jon Mello Collection
2328  Model Specific Discussions / Trans-Am Camaros / Re: 1969 Mid-Ohio Trans-Am photos on: October 02, 2011, 12:30:05 AM
Three more photos from this race which did not get posted earlier.

Russ Norburn (#17) and Bert Everett (#14) going under the bridge at turn 1.

Photo by Ron Lathrop

Mark Donohue's Camaro and Ted Roberts' Javelin.

Photo by Ron Lathrop

The Don Yenko and Rusty Jowett Camaros.

Photo by Ron Lathrop
2329  Model Specific Discussions / Trans-Am Camaros / Re: Original T/A racing photographs, late 60's & early 70's on: October 01, 2011, 12:09:22 PM
Mark Donohue in the #15 car at the '68 Sebring Trans-Am.

2330  Model Specific Discussions / Trans-Am Camaros / Re: Dyno sheets from the era on: October 01, 2011, 12:02:02 PM
Here's a dyno test from Febuary 3, 1967. Another test of a 302 with the 0-302190 experimental camshaft.
It looks like milling the heads to increase compression, blocking the heat crossover passage, changing the
valve springs, and porting the heads and intake increased both horsepower and torque.


2331  Model Specific Discussions / Trans-Am Camaros / Re: "Inside the Cars of the Trans-Am" and other articles on: October 01, 2011, 11:38:36 AM
From the April 1968 issue of "Sports Car", the national publication of the SCCA.



2332  Model Specific Discussions / Trans-Am Camaros / Dyno sheets from the era on: October 01, 2011, 01:15:56 AM
Here is a dyno test run by former GM engineer and Trans-Am racer Jerry Thompson back on 2-13-67. It was a test of two experimental
camshafts in a 302 engine. The first cam, p/n 0-261898, had .495" lift on the intake and .465" on the exhaust. The second cam, p/n
0-302190, also has .495" lift on the intake but a slightly higher lift of .475" on the exhaust. Unfortunately, we don't have any of the
other cam specs but these seem to be in the vicinity of what became known as the first "off-road" camshaft, released to the public in
1968 as p/n 3927140. Interestingly, the first cam with the slightly lower exhaust valve lift yields modestly higher torque and horsepower
readings. The chart paper does not show readings beyond 6,850 rpm and, as such, the second cam may close the gap and/or surpass the
other in the 7,000-7,2000 rpm range.


2333  Model Specific Discussions / Trans-Am Camaros / Re: Old Bits That Still Work - Chevy 12-Bolt Rear End on: October 01, 2011, 12:52:58 AM
Thanks, Chad. I appreciate you sharing your thoughts. For racers who think the 12-bolt is not a strong enough piece to race with, that is a fallacy. The Ford 9" is a very strong unit and does allow easier gear changes however, I don't believe there are vintage racing guys changing ratios from one race to another. Also, I hear the Ford 9" has slightly more parasitic horsepower loss than than a 12-bolt.

There is precedence for guys running Ford 9" rear axles in Camaros and there is even one that I know of that used a Chrysler 8-3/4" rear axle. That is because of a rule change for the 1970 season that allowed racers to use rear axles from rival manufacturers. Why the SCCA felt they needed to make this change, I don't know, but they did. With that being said, nothing but a 12-bolt rear axle was used in a Camaro in the 1967-1969 years and that includes the Penske cars. Also, the vast majority of Camaros running in Trans-Am up through the "classic era" cut-off year of 1972 continued to utilize the GM 12-bolt.
2334  Model Specific Discussions / Trans-Am Camaros / Re: Trans Am racing pace car pics...are there any? on: October 01, 2011, 12:37:30 AM
Glad to hear you are finding some things to help you out. Here is a shot of the '68 Daytona 24hr pace car (SS396) with actor James Garner driving and Nascar boss Bill France in the passenger seat. In 1968, the Daytona 24hr race was part of the Trans-Am race schedule. The upper body color is red, if I remember correctly, and the car does have a rear spoiler (although it is cut off in this photo). This car still exists.

2335  Model Specific Discussions / Trans-Am Camaros / Re: TRACO Chrome Small Block Chevy Valve Cover Pictures on: September 29, 2011, 09:32:26 PM
Mr. "Sixteen Grand Sedan #56" pointed out an ebay auction to me for an NOS painted version of these valve covers. The great part is it has a part number for us to reference.

The GM parts book indicated it is for...
64-66 Chevelle 327 (exc Special High Performance) Left or Right
65-66 Nova 327 (exc Special High Performance) Left or Right



2336  Model Specific Discussions / Trans-Am Camaros / Re: Old Bits That Still Work - Muncie Transmissions on: September 28, 2011, 11:16:59 PM
Don't worry, Chad. I wasn't going to beat you up too bad over that.  Grin

I do agree that the Muncie is a great choice in a vintage race car. You are not the only Camaro guy opting to run one but there are others who, for whatever reason, choose not to. There are many Camaros running Ford 9" rear ends and also guys who are successfully running with a 12-bolt (including yourself). Let me hear your thoughts on the 12-bolt when you have an opportunity. I really did not enjoy seeing the '69 Penske car with a 9" under it. It does not suit the history of the car.
2337  Model Specific Discussions / Trans-Am Camaros / Re: TRACO Chrome Small Block Chevy Valve Cover Pictures on: September 28, 2011, 08:28:49 AM
Great detective work, Chad. Thanks for continuing to follow up on this subject. I suspect that the valve cover usage was '67 and earlier GMC V8s, not just limited to the year 1967 itself.
2338  Model Specific Discussions / Trans-Am Camaros / Re: 1969 Wolverine Trans-Am photos on: September 27, 2011, 01:38:35 PM
I would be very interested in seeing the photos of the Jim Paschal (pronounced like rascal) Javelin that you mention. There definitely were cars that raced in both the Trans-Am and Nascar GT series but that was usually just for the events at the Daytona Speedway such as the Paul Revere 250 and the Citrus 250.
2339  Model Specific Discussions / Trans-Am Camaros / Re: YouTube (or other) videos of early Trans-Am racing on: September 21, 2011, 07:19:43 AM
Thanks!

I'm not sure if this one has been posted yet but I found it today looking through many videos on youtube.  Some of the sound has been dubbed over and it looks like they sped up the film at certain points but its pretty good footage nonetheless of the 1970 Lime Rock race.

http://www.youtube.com/watch?v=Q0qgchd5zHA&feature=related
2340  Model Specific Discussions / Trans-Am Camaros / Re: 1969 Wolverine Trans-Am photos on: September 21, 2011, 07:15:50 AM
Don White was the an official AMC driver in Nascar's version of Trans-Am, which was called Nascar GT and later Nascar Grand American. John Martin also drove in Nascar GT with a Javelin and used car #4. Possibly the same #4 that was run in Trans-Am. I don't know for sure. Seems like Jim Pascal was the most successful Javelin guy in Nascar GT in 1969 but I don't know if his car was prepared by Ronnie Kaplan or not. I'm thinking it was not.
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