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1973 Grand Am 455 Super Duty
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Thank you, very interesting read,
always saddens me that while pontiac folks have access to so much great info, the same corporation has made info for other makes unoptainable. |
Sd-455...
Great article and story...
Interesting time at the end of the muscle-car era....big motors still available [minus the compression]...net HP ratings...crash bumpers and catalytics on the way. Thanks for sharing.. -wilma |
What a great story,…amazing
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Wow - thanks for sharing
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When you think you've seen it all....you haven't. Wild.
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Amazing how finding that engine came together. Hopefully the body will surface. You just never know.
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----I ordered a 73 SD Grand Am new. I was told by the dealer (Pontiac and Buick) in Medina Ohio that it was available. Dark blue with blue int 4-speed. I waited and waited. The dealer told me to be patient, but I think I learned from one of the salesmen that I would never get it. Why I ordered a new Riviera Gran Sport is still mystery to me. Kept it for about 6 months and traded it on a left over 72 Trans Am at Knafel Pontiac that had been Bill K's wifes driver. Way happier with that!.....Bill S
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This actual engine was just shipped to Australia and is destined to go into the prototype SD455 Trans Am magazine test car. It was found down under ten years ago by a guy who just happened to find a used 73 T/A and wanted to restore it. When he got the PHS he freaked out (justifiably).
http://forums.maxperformanceinc.com/...710829&page=11 |
I wonder if this is how there were a couple of "Developmental" 1971 LS-6 Chevelle SS's....
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It's what the guys at the Proving Grounds (whether Milford or DPG) get paid to do: play around with stuff, all day, every day. K Quote:
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Two additional sidebars, as I read back through those (written almost 15 years ago):
Sidebar #1: back then we were running "Super Chevy" events all the time and you had to run a Chevrolet nameplated vehicle. We would swap out the GMC grill and tailgate for Chevrolet versions, but leave the GMC fender emblems and dash emblems. No one ever noticed or said anything, to my knowledge. Sidebar #2: Here are all the mistakes in that very tiny blurb of an article: 1) "Rumor has it" - well, as you can see, it was no rumor. It was true. 2) "...some engineers at GMC Truck and Coach..." - well - no, by then we were GM Truck and Bus. Truck and Coach implies the bus factory in Pontiac; we were obviously located in Milford. 3) "...found a fresh ZL1 in a crate in a dusty storage room somewhere in the bowels of Detroit..." - not correct, unless you consider Milford to be "the bowels of Detroit". It's a 45 minute to an hour drive, depending on where you are coming from. And - the warehouse is not dusty. It's pretty clean. 4) "...they jerked the 454 out of a 1986 shortbed pickup..." - we've already established it was originally a small block truck and was a 1985 shortbox, not an '86. 5) "...switched over all the brackets and hardware onto the aluminum 427..." - as discussed, this specific motor was a 454 rather than a 427. 6) "..it's been screaming around the Milford Proving Grounds and laying waste to unsuspecting Corvettes and Trans Ams." - well, ok, that was true... Makes one wonder how accurate all the articles we read actually are. Except for mine, of course. K |
Great story!
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Bill |
keith how hard was it to get the job of testing vehicles there? i would only imagine you would have to be an engineer, several years of service and ??? did you ever get to do that job?
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-- Just like the US government, GM was a decentralized corporation. Each company within dealt with its operations. If something is no longer existing pertaining to a particular marque, chalk it up to operations not needing old paperwork to languish. -- People also have stolen paperwork from said marques. -- Today, there are people who have paperwork but won't share. That's a big reason why you may not have access to something. Nonetheless, if you have needs, check with the GM Heritage Center. You may be surprise what they find. |
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After I had transitioned from the assembly plant into an engineering/assembly liaison position, management came around looking for volunteers to move to Arizona. We often vacationed out there growing up and I thought it would be a cool place to live and work, so I raised my hand. Upon further review they decided I should have some development experience before moving out there so they assigned me to the Milford Proving Ground first. I ended up staying at Milford for three years (’86-’89) and then at the Desert Proving Ground for four (’90-’94). K |
There are two types of activities that take place at a proving ground: development and validation.
Validation is probably what you are thinking of when you think of the testing. This is where you have rigid test procedures, verifying that the vehicle meets specific regulatory and customer requirements before being sold to the public. There is a team of engineers (usually young, entry level positions*) and drivers who would spend all day doing high speed testing on the circle track, or 8 hours of low speed city traffic, or driveway entry and egress, or emissions testing, or whatever. Development is where you play around all day. These assignments are usually project based, either improving on an initial/existing design or addressing a specific customer complaint. Often there is no test procedure and the engineer has to create the process of how to evaluate the changes and what the pass/fail criteria should be. Normally this is where the old timers reside. I did full vehicle development on the C/K trucks (pickups, Blazers and Suburbans) and then, at the DPG, driveline and brake development. Some memorable projects were various brake pulls and pedal feel issues, throttle calibrations, driveline vibrations and noises including launch shudders and rear axle noise and the like, both on the road and in a chassis roll dynamometer cell, and captaining off property road trips to Death Valley or Pikes Peak and other western locales. I think I was pretty good at fixing stuff but my weakness was in determining what was “good enough”. Having grown up around tri-power Pontiacs with rock crusher transmissions I might have had a greater tolerance for various moans, groans and whines than the typical engineering manager. I remember one time my boss took me out for a ride in a manual trans truck. Shifting through the gears and pointing out the gear whine he said “hear that? You gotta fix that.” “Fix it?” I said. “I like it!” K *most of these entry level engineering positions were what we would call “5th level” or “6th level” jobs. Because I started in the assembly plant I came into engineering directly as a 7th level engineer, giving me a level or two head start on my peers. All according to plan: 8th level was the “carrot” which is when you were assigned a company owned vehicle. I got my 8th in October of 1991. Everything went pretty much according to plan until "The Unpleasantness of 2008". |
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The discovery of the Pontiac information was a "happy accident" that we can attribute purely to Fred Simmonds. Chevrolet was just too big and too spread out to have such a convenient, centralized location for all the information to reside (and subsequently be discovered). K Quote:
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The guy from Milford was named Hayes Hoboth. He was probably involved during the creation and development of dirt. About that same time I had just finished reading Delorean’s book “On a Clear Day You Can See General Motors”. In it he describes this time when an engineer was trying to emulate the ride/handling of some MOPAR model and had procured a steering gear from that model. He had the gear put into one of our vehicles and was told the car was ready to drive. After clearing the hoist he turned the wheel to exit the building and immediately backed into a post. Trying to move forward he hit a couple more stationary objects before judiciously shutting everything down. Turns out the gear was “front steer” and the car he put it in was “rear steer” (or vice versa, or whatever) and so the road wheels were turning in the opposite direction of the steering wheel. They hadn’t comprehended that prior to going for a drive. Anyways – I went to Hayes’ retirement party. As the night wore on the stories got more animated and began to flow more lubriciously. At one point one of his buddies gets up and starts telling this story about how Hayes got this steering gear and then wrecked the car before he could even get out of the garage. Turns out the guy I was replacing was the guy in Delorean’s book. K |
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thats awesome keith. i cant remember now when it was but he let me know he was retiring and had enjoyed looking up all the cars for me. i tried to pay him over the years for it and he wouldnt take a dime. he always told me that he really enjoyed looking at the paperwork on the old cars. i really never knew what he did title wise there but he was one super nice guy. (he saved me from buying numerous fake judges i do know that).
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