1968 & 1969 Smokey Yunick 302 Hemi Z-28 Camaros from the Bob Marvin Collection at “The Shed”.
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- Опубліковано 1 тра 2021
- Here we have the 1968 and 1969 Smokey Yunick Camaros wirh Hemi 302 engines. The history of these engine is exceptionally spectacular as the engines begin inside Chevrolet engineering, extends out to the famous race car engine builder Smokey Yunick, and then on to compete in later Trans Am racing.
It would be hard to find another engine that has been touched by as many famous and talented personalities in racing and engineering.
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Smokey was probably one of the smartest mechanics to ever turn a wrench.
Those 1968 Hemi 302cid Camaros Smokey built for the TransAm racing series have more innovation than DARPA and Sandia Lab combined... First n/a engine to make over 2 hp per cubic inch!
I thought I knew a lot about the small block, but had never heard of this one. Cool!
2 Horsepower per CID?, needs to be investigated. Hemi chambers might be better but not that better. I talked to a pro racer that drove a Pontiac toolroom hemi that I can't find any info on.
650 HP at the rear wheels? I'd like to see that happen. For a 302 CI engine naturally aspirated and that HP that has to be a "happy" Dyno. Crankshaft HP is even questionable. 2 HP/ci NA is a stellar engine even with today's technology.
this collector is very lucky and very greedy!!!
Looks more like a big block head. Plug is too low to be a hemi.
They are not HEMI ! 302 with crossfire intakes!! No sparkplug going thru the valve cover..
So...Smokey design new heads for the 302 block? Sorta like Zora Arkus Duntov designing "ArDun" heads for the Ford flathead? and Zora was the father of the Corvette? You know that Smokey didn't produce the heads himself but was working with Chevrolet/GM engineers. That means that somewhere in the deep dark caverns of Chevrolet engineering are the "blueprints" for theses heads!!!!
The TA competition rules in the day required over the counter parts. Smokey wanted more valve lift. The way to get that was big block rocker arms with the 1.76:1 ratio. The length from the ball stud center to the valve stem center was longer. This required filling the rocker stud holes and drill and tap toward the intake side the required amount. Then the rocker arm hit the rocker cover. Smokey and his team being the innovative guys they were just put the valve cover over a piece of pipe and massaged it with a ball pien hammer to get the clearance required.
I got to tour "The Shed" one afternoon in Warroad, Minnesota. It's across the street from the Marvin Window factory I was in town to see. Bob Marvin was a very gracious host. He epitomizes the "regular guy" ethic. He just loves these cars and brings them out as often as he can.
Man! 650 hp from a 302 is nothing short of amazing! You would think it would be way more cammy.
Smokey never stopped. He was hashing out stuff till the day he passed. The hemi designation on this will have to be reserved till I can see the chamber. Looks like best it could be is a polysphere motor. Like an early Chrysler A motor,the 277-318 mills.
I'm glad that they are driven on a regular basis!
Back in the early 90’s, Reggie Jackson brought the silver one into our service station to have it put on our engine analyzer. I always wondered what happened to that car.
I love "Different" stuff, especially when it's Chevy stuff! And 1st gen Camaro to boot!
Killer cars there’s no other than the best damn garage in town with Smokey yunick he was the man GM let him experiment on alot of different things he said he had to paint the windows in it to keep prying eyes from seeing and later on chain link fence with barb wire around the top to keep them out he helped them with the 327 and the 400 small block he also had the racers in the early 70s long track used a 400 small block with a 327 crank and still produce 350 cid and use the 307 with a 400 small block crank this way it’s the old Buick 350 bore and stroke until nascar found out then they made a rule for the 4” bore and 3.50 stroke so they couldn’t have an advantage of the GM blocks and cranks being produced
Wow what a beautiful piece of engineering
I read about this when I was a kid. For years people tried to tell me it never happened.
Thumbs up, Thanks for sharing, Legendary History