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106409 Posts in 12404 Topics by 4785 Members
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76  Model Specific Discussions / Trans-Am Camaros / Re: 1969 Wolverine Trans-Am photos on: June 05, 2012, 11:06:27 AM
In the last photo, there is just a glimpse of what appears to be the right front of a 1963 Ford Falcon. If I'm seeing correctly, it might be Mike E's  car originally driven by James Taylor, although I wasn't aware it was raced that late.
Robert
77  Model Specific Discussions / Trans-Am Camaros / Re: TRACO Fans on: June 04, 2012, 11:21:26 PM
Thanks for the follow up Pigpen.
 I suspect those early carbs may have been versions of the Holley 4224 and 4223S and possibly the 4543S. The first being the center squirt 660 cfm and the later two being an 850cfm configuration, also center squirters. These carbs were of the 1 to 1 primary and secondary throttle opening variety. They used a cam type linkage with the central 50cc accelerator pump to achieve a smooth opening of all throttle blades simultaneously, and inwardly as you suggested.

The 850 cfm versions were popular on the Big Blocks in a single 4V application, and also could be used in pairs on a potent Big Block. L88's were a common home for them.
The 660's may have been tried on the 302's.  The pair of 660's on my AMC Traco intake are setup  as you mentioned with the air horns machined off. The inward throttle blade opening is necessary for proper fuel distribution with the intake design. Also of note,the 4224 660's are the carbs listed in the SCCA Javelin Trans-Am Homologation papers. They are to be used in pairs.

I believe the Holley List 4778 is rated at a 700 cfm capacity, and has undergone several revisions.

The bottom line on these carbs with simultaneous opening secondaries is you better be positioned properly before putting your foot in it!
Robert
78  Model Specific Discussions / Trans-Am Camaros / Re: TRACO Fans on: May 25, 2012, 01:54:45 PM
Hello Pigpen,
  In an earlier post, a Chevrolet inline dual four barrel was mentioned.
"The Chevy factory supplied TRACO with a dual in-line 4-barrel prototype manifold (not the Cross Ram) on which we spent a lot of time gluing in runners at the bottom of the plenum to equal out the flow, eventually the factory modified their pattern to match what we'd done and a number of the manifolds were produced. We also performed a similar series of tests for the Cross Ram, which Chevy used to make improvements."
   I'm curious about the inline carbs used. Do you recall the type? Is it possible Webers were used, or maybe something GM prototyped?
   It sure would be interesting if the Chevy dual inline four barrel manifold surfaced.
Thanks for all of your contributions!
Robert
79  Model Specific Discussions / Trans-Am Camaros / Re: TRACO Fans on: May 19, 2012, 12:53:04 PM
I seem to recall those oil deflector clips were originally made by Isky. I see they are still available down in Torrance, Ca at: http://www.rockerclips.com/index.html
I'm sure there is not much market for them, as most use rollers now.
 Hey Jon, I like the background  in your first rocker clip picture!
Robert
80  Model Specific Discussions / Trans-Am Camaros / Re: TRACO Fans on: May 17, 2012, 09:59:25 PM
In regards to the TRACO AMC Trans-am intake manifold that I use, the following information was obtained from the very helpful Pigpen.


 

Hello Gene, aka Pigpen,
     First, I’d like to thank you for your time and efforts to share a part of your life with us on this forum. Your first hand experiences can and do lend a hand to the legendary name of Traco.
     Growing up in Southern California during Traco’s Trans-am days, I can attest to not only the “street” reputation, but also of the “mystic” that surrounded anything Traco’s name was on.
      I was fortunate in 2005, to acquire and restore a 1969 AMX that had been raced in the 70’s. When found, it was equipped with several Traco specific components. The unique Traco two four barrel intake manifold being the most prominent. Our forum has a brief description and history on the car and the Traco manifold. You can find it posted under entry #9 here:
http://www.camaros.org/forum/index.php?topic=8069.msg66670;topicseen#msg66670

As posted, I feel fortunate to have received some great recollections from Stewart Van Dyne concerning Traco’s AMC program, and primarily the Traco intake.  I hope you may be able to add to the history of this special intake manifold.
     As I understand it, the intake was initially engineered for the Trans-am program. Photos of a similar intake with a single four barrel top have surfaced showing use on the Trans-am Javelins. I have not been able to find any clear photos of the Dual Four  being used on the Javelins though. Do you have any recollections of this Dual Four Intake?  Stewart remembered dyno times with the manifold, and believed it was tested or briefly used on a Javelin before the rule change. He also thought  it may have later been tried on the Matador, but I believe he was away from Traco by then.
     As stated in the forum post,  it’s a terrific running manifold.
      On another note, you might recall a Traco designed AMC lifter retainer. It shows typical Traco execution, beautifully formed of stainless steel. I am still using it in the AMX, and wouldn’t think of running an AMC without one.
        Again Gene, thank you in advance for any tales you may have concerning my intake, but most importantly, your contributions to this forum.
Best Regards,
Robert

Response from Pigpen:
Yes I was involved with the design and testing of that manifold along with many other people at TRACO. I'm surprised Stewart remembers it, he was up to his ears in Offys and had little time for anything else, he was TRACO's Offy expert, and later proved to be one of the foremost Offy experts in the industry.

A little background; Many of the earlier TRACO track engines were built using Weber carbs, 1 cylinder / 1 carburetor, easy to jet and tune, lots of breathing capacity.

The Chevy factory supplied TRACO with a dual in-line 4-barrel prototype manifold (not the Cross Ram) on which we spent a lot of time gluing in runners at the bottom of the plenum to equal out the flow, eventually the factory modified their pattern to match what we'd done and a number of the manifolds were produced. We also performed a similar series of tests for the Cross Ram, which Chevy used to make improvements.

From what we learned on the Chevy manifolds and our Weber experience, we designed the AMC manifold to mimic (as much as possible) a 1 cyl / 1 Carb design, but with a common plenum (rules is rules). That strange plenum design (you mentioned) was the result and worked quite well.

The 304 CID AMC Trans AM engines had been tuned to the maximum using a single 850 Holly (or was it 800), so when we attached the dual 4-B manifold, which allowed for a serious increase in breathing, we found that the added horsepower reduced the life expectancy of the engines from 1 to 2 races to about 1/4 race. They were fine for the drags, but the Cam and lifters would have to be changed for any serious track use. About that time, the rule about using 1 4-B was issued, pretty much ending the work on that project for Trans Am. The Matador, under NASCAR rules, could only have a 1 4-B set up.

What Stewart mentioned about the cam bearings was right on, the bearings were compressed and spun right out of their journals, welding themselves to the cam. We tried a few things and finally ended up using a special Aluminum Bronze alloy for the cam bearings.

I do remember the first time that manifold was dyno tested on a 304, The torque curve just kept climbing and climbing, everyone in the shop was cheering and yelling "Go Baby Go". I don't remember the exact horse output, but it easily broke the 1.7 horse per CID rule of thumb for a normally aspirated track engine.

Pigpen


 
81  Camaro Research Group Discussion / Originality / Re: Original 1969 Z/28 air cleaner base? on: April 27, 2012, 10:26:42 AM
David, Here are a couple photos from a March, Flat Hood Z/28:   (The breather tube was damaged modifying it for a double pumper Holley)


82  Camaro Research Group Discussion / Originality / Re: Original 1969 Z/28 air cleaner base? on: April 27, 2012, 10:17:02 AM
Hi David,
   It appears your base is correct, but that "new gloss" makes it difficult to see in the photos. I don't see the elbow coming out of the bottom. I thought it was integral with the base, but I may be wrong. I'll post some photos of mine for you to compare to.
Bob
83  Model Specific Discussions / Trans-Am Camaros / Re: "Inside the Cars of the Trans-Am" and other articles on: April 24, 2012, 10:44:24 AM
Thanks Jon and Swede70 for a great story to start the day! I think we can all relate to a ride along experience!
Bob
84  Model Specific Discussions / Trans-Am Camaros / Re: New Zealand/Australian Camaros And Firebirds on: March 28, 2012, 09:30:58 PM
Hello,
    Glad to hear of your success in finding more photos. As to your search for a manifold, Kinsler Injection might be a good place to start. They may at least have some leads for you.  Kinsler does manufacture a cross ram set up, but of course, theirs is for fuel injection.  A couple links to their site:
http://www.kinsler.com/page--GM--17.html

http://www.kinsler.com/56pg_hand_HTMLs/pg5_H.htm

Best of luck in your endeavor.
Bob
85  Model Specific Discussions / Trans-Am Camaros / Re: 1967 Las Vegas 350 Trans-Am --- Stardust Int'l Raceway on: March 27, 2012, 10:08:11 PM
Great compilation of the Vegas race, Jon! We really appreciate you taking the time to share this historic "blast from the past".  It really made my day, thanks again.
Bob
86  Camaro Research Group Discussion / Research Topics & Reports / Re: Gas tank date codes on: March 22, 2012, 10:37:09 PM
Fuel Tank on my 1969 Z/28. 03B Van Nuys
87  Camaro Research Group Discussion / General Discussion / Re: Anybody running 275R60 X 15 tire? on: March 22, 2012, 12:08:52 PM
Yes, there are are few of us. I run the regular BFG's on my 69Z's factory 7 inch wheels. No problem at all, but it is very dependent on the individual car. My son's 69 slightly rub with the same set up. A 265 is the safe bet.  I love the look on the car, but of course, the judges don't.....
Bob
88  Camaro Research Group Discussion / Decoding/Numbers / Re: Subframe date stamping on: March 15, 2012, 01:06:35 PM
Hi Mike,
  Yes, I attached a photo to the post. I see it on my monitor, but if there is a problem , I'll attempt to post it again. Otherwise, it looks just like your photo.
Bob
89  Camaro Research Group Discussion / Decoding/Numbers / Re: Subframe date stamping on: March 15, 2012, 10:59:53 AM
No date stamp, but here is a photo of the yellow mark on a 03B  LA car.
90  Camaro Research Group Discussion / General Discussion / Re: Hendrick Motorsports Olympic Gold 69 Z28 for sale. on: December 06, 2011, 11:36:47 AM
Sorry, I just have to nitpick, but why can't they get the Z/28 emblem in the grill placed correctly?
Bob
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