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68 MP Motion
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Re: 68 MP Motion
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The Silver Bill Thomas Nova at 2011 MCACN had similar paperwork indicating a 467 ci engine. I think the BT one was actually internally balanced. Don't know recall any specifics on the MP option. Looking forward to the comments.
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I've never been able to compare the two side-by-side, but the "other" aluminum BBC of the time was the Chaparral block for the race cars.
I think Grumpy never ran a ZL1 block but did have several of those. |
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The Can Am block was a 4,440 bore and ZL1 was 4,250 bore.
But its not that, look at the side of the block, there is a oil or a Water chanel there. A year ago there was a guy that showed some pictures of his zl1 block and it looked like this block. |
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a lot of the can am blocks did not have sleeves. they used a tin/iron coated piston and the block was honed to yield a high silicon rate in the aluminum bore. easily identified. jim halls ( chaparral )block i believe were cast by reynolds aluminum themselves. jim was a secretive guy about everything. did the GM 430 "can-am" block have a winters mark?
the early blocks couldve been reynolds or alcoa sleeved blocks from the can-am lineage. as far as distinguishing them apart i have no idea. Doug Meyer Shadow team engine builder <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body"> I was an engine builder for the UOP Shadow Team from 72 through 75 and built these engines almost exclusively. Engines I assembled were driven by Jackie Oliver, George Follmer, Vic Elford, James Hunt and Peter Revson. I was trained on them by Lee Muir who came to Shadow directly from McLaren. I've got loads of photos and, if I dig deep enough I can probably dig up my track/tuning notes. In the early Can Am years only three teams had the Reynolds "390" Aluminum blocks. McLAren, Shadow, and Chapparral. Later they became more common, but most of the "lesser" teams didn't use the all-aluminum 390 blocks, but iron sleeved castings. All were Lucas injected. McLAren did their own porting, as did we. The usual well known California head guys did most of the rest. We rarely built 510's, almost always 495's. Race trim hp was about 735with flat tappets. We bult some roller tappet "Qualifyers" that did about 775 hp. In '73 we built a 1200 hp turbo 495 (I could change those head gaskets in my sleep!) to compete with the 917K. We were faster at Laguna Seca but ran out of brakes. Vic Elford was driving- Donohue came over to Lee and I after the race and told us "he'd NEVER seen anything accelerate up the hill like that beast". THe tires on that car were 24 inches wide and it would leave giant blackies all the way up the hill. I've built lots of engines but those are still my favorite. Nothing in motorsports sounds like 20 of those things at the green. I'll never forget it. We got our parts directly from GM racing. The sleeveless blocks were all Reynolds since Reynolds was the developer of the high Silicon 390 alloy/iron plated piston technology. Could be that the sleeved blocks the "regular people" got were Alcoa castings. </div></div> GM #'s 3992038..Block, 4.44" bore AL W/Liners 3993803..C/Shaft, 3.47" stroke 3963642..Rod, connecting 6.405" C/C 3992042..Sleeve, cyl liner (for 430" AL) |
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"WOW"That is some good info,would love to here that noise,stuff you never forget,thank you. *Paul
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----Used to go to Mid-Ohio back during that period for the Can-Am's. You are correct,,,the noise was unbelieveable.We would usually sit at the end of the long straight and you could hear them coming and then letting off and braking for the off-camber turn at the end of the straight. Heaven!!!.......Bill S
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<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Carleen</div><div class="ubbcode-body">https://www.youtube.com/watch?v=ZBNh8...eature=related </div></div>
ive watched this vid sooo many times. best part is at 2:00 in. the M8F sucks the F1 car into its NACA ducts and rips past it in the blink of an eye. the days when a BBC powered car obliterated the lap times of F1's. |
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I beleive the 1968 Motion drag car "466" engine was a .060 over 427 block with a 4" aftermarket stroker crank.
Today most people would call it a "468" BB Chevy same as a .060 over 454 BB Chevy but the actual cu. in. is about 466.9 |
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4,44 bore and 427 crank = 465.730488cu/inc.
Can Am 465 engine. |
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Your probably right Joe.
Havent seen any 67-68 4.440 bore Alu Blocks |
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<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Carleen</div><div class="ubbcode-body">466" engine
http://i517.photobucket.com/albums/u...kewi/009-1.jpg </div></div> the top right pic is early westhampton on long island i have a ton of pics from there starting in the early 80's wish that track was still there. |
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The Magazine is from Dec -68
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"WOW" Chaprral Block for the Race Cars,and Doug Meyer Shadow team Engine Builder. "WOW" I would love to could still here it "NOW".....*Paul*....Just to Sound Accurate with black tire marks...68 MP MOTION...
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Good stuff now and then 68 MP MOTION,olredalert,Heaven!!! *Paul*too.
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