Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor - Chevelle Tech
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  #1  
Old Jul 5th, 12, 10:24 AM
spinshop spinshop is offline
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Tim
 
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Default Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

I read some where that this motor was built in 1963 or 64?
I wonder why they were not put in chevelles until 69.
http://cgi.ebay.com/ebaymotors/Extremely-Rare-Chevelle-SS-GM3-Z16-427-Mystery-Motor-/290735652732?pt=US_Cars_Trucks&hash=item43b131ff7c
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  #2  
Old Jul 5th, 12, 10:40 AM
Derek69SS Derek69SS is online now
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

That guy has quite the imagination it seems...

BTW, the MkII 427 "Mystery Motor" from 1963 is a completely different animal, and this thing is definitely not one of them. This is a MkIV bigblock with little information and a lot of fantasy in the ad.
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  #3  
Old Jul 5th, 12, 11:18 AM
Bunz-T Bunz-T is online now
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

Even if it had credibility I can see no more value than an exibition piece. With no specific car to tie it to value is very subjective.
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  #4  
Old Jul 5th, 12, 12:01 PM
AZCamino AZCamino is offline
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

That's the most BS I've seen in a long time. It is obviously a 396 350HP block out of a 68 Chevelle built at the Fremont assembly plant. I didn't bother to check the heads.
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  #5  
Old Jul 5th, 12, 12:27 PM
Doc Toothache Doc Toothache is offline
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

What's GM3?
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  #6  
Old Jul 5th, 12, 12:41 PM
SS427Rick SS427Rick is offline
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Cool Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

Hot rodded big block from the 70's/80's. What's the mystery? Bunch of BS.
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  #7  
Old Jul 5th, 12, 12:58 PM
Derek69SS Derek69SS is online now
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

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Originally Posted by SS427Rick View Post
Hot rodded big block from the 70's/80's. What's the mystery? Bunch of BS.
Can't be... he says it's a 1000hp factory assembled engine. Nevermind the block and heads were cast in 3 different years.
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  #8  
Old Jul 5th, 12, 2:23 PM
novadude novadude is online now
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

I visited that website. All I can say is "Wow!". Some people have overactive imaginations.

The best was:

"Refer to these sites where the heads shown below are a matched pair with matching Tonawanda clocks"

"Matched pair" with 2 different year date codes and completely different casting numbers? Ummm.... OK....
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  #9  
Old Jul 5th, 12, 3:03 PM
jackie schmidt jackie schmidt is offline
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

Guys, I may still have the originol Hot Rod Magazine that ran the very first article on the new "porcupine head mystery motor" that Chevrolet was developing for NASCAR. (yes, I'm that old)

They have a picture of the block, (2 bolt mains), and the crank, with a fellow holding the stount as the crank sat upright. The motor was designated a MK-2. This of course lead to the Mk-1V, the biggest feature being the new canted valve head design.

These were the new motors that were going to stand NASCAR on it's ear.

This ad is total BS.
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  #10  
Old Jul 5th, 12, 3:18 PM
69F41SS 69F41SS is offline
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

Quote:
Originally Posted by jackie schmidt View Post
Guys, I may still have the originol Hot Rod Magazine that ran the very first article on the new "porcupine head mystery motor" that Chevrolet was developing for NASCAR. (yes, I'm that old)

They have a picture of the block, (2 bolt mains), and the crank, with a fellow holding the stount as the crank sat upright. The motor was designated a MK-2. This of course lead to the Mk-1V, the biggest feature being the new canted valve head design.

These were the new motors that were going to stand NASCAR on it's ear.

This ad is total BS.
Hi jackie, just wanted to point out that out of 363 post on TC you have spelled originol and originolly wrong 342 times. The correct spelling is original and originally.
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  #11  
Old Jul 5th, 12, 4:00 PM
spinshop spinshop is offline
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

Quote:
Originally Posted by Derek69SS View Post
That guy has quite the imagination it seems...

BTW, the MkII 427 "Mystery Motor" from 1963 is a completely different animal, and this thing is definitely not one of them. This is a MkIV bigblock with little information and a lot of fantasy in the ad.
Oh,O.K. I thought this was the same.
I read this old thread hear from 06.

"DZAUTO
Sep 18th, 06, 7:49 AM
Chris,
Yes, you absolutely have missed something here. But don't feel alone, there are MANY, MANY people who do not realize that in 1963 Chev built TWO (2) totally different 427s. One was the Z11 which was a genuine RPO (Regular Production Option). ALTHOUGH, the Z11 option was very little known by the general Chevy buyer, it was a genuine option (of course it was targeted at the serious racers), and anyone who had the money to plop down could go to their local Chevy dealer and special order one. The Z11 option was (as you probably know) a COMPLETE pkg--------------------NOT just an engine. MOST engine options start with the letter L (ie L88, L79, LS6, etc) and MOST pkgs that include multiple components, usually of a performance nature, start with a Z (ie Z11, ZL1, ZL2, etc). The engine which came with the Z11 pkg was a stroked version (basically) of the 409 (or W motor as we know it). And it ONLY came ONE way. To mention a few variations from the regular 409 were, different heads (to include the very first pushrod guide plates), different valve covers (upper outer corners were a little different) ,2-piece intake manifold, modified oil pan, cowl plenum air cleaner, etc.

The 427 "Mystery" engine was a totally different design from anything that had been produced up to that time. And also, different from anything built since. Yes, the 427 resembles a MKIV engine, but it is NOT. Nothing, repeat, nothing from the 63 MKII 427 Mystery engine interchanges with a MKIV engine. The 427 (officially the MKII version) Mystery engine was built rather clandestinely by the Chevy engine (the leader of the pack was Dick Kenaith) engineers and WAS NOT available to the general public! It was "provided" out the back door very secretly through a few sources such as Smokey Yunick to bonefied NASCAR racers such as Junior Johnson, Rex White and others. These engines were "field" installed and tuned and pretty much blew away the competition at the 63 Daytona 500. Because of minimal testing (the testing was actually done by the people who raced them), their longevity generally proved to be less than desired. But they ran great!!! The top brass at GM/Chev got wind of this "Mystery" engine that was doing so well through outside gossip channels and mandated that all development be stopped immediately (another example of the dumpa$$e$ upstairs within GM, they existed then and they exist today). As you have noticed from the pictures above, that 427 Mystery engine "looks" like a 396-454 MKIV engine-------------but it's not!
The VERY FIRST BB family was the MKI-348-409-427(Z11).
The MKII was the 63 427 Mystery engine pictured above.
The MKIII existed ONLY on the drawing board---none were ever built.
The MKIV was, well, we all know the MKIV quite well as the 396-402-427-454 family.
The heritage has continued with the MKV and MKVI (496-502-572).

Now, you know the story."
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  #12  
Old Jul 5th, 12, 5:30 PM
jackie schmidt jackie schmidt is offline
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

Well, heck, Sonny, that's what I get for not graduating the 5th grade.
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  #13  
Old Jul 7th, 12, 8:49 PM
Verle Verle is offline
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

I took these pictures at Laguna Seca in 2002 historic races.
This is a real 63 427 Mystery Motor.

There is a plaque just behind the engine in the upper picture that gave specs but I cannot find a picture of it.

If someone wants to scale the engine from the alternator that would give an idea of length.

Compared to a MK IV big block it is very small, more like a small block with different heads.

One story I heard was they took a W-motor block as a starting point and recast and machine it with head surface 90 degrees to cylinder bore. Compared to a BBC it had a short deck height.

Note the cast iron headers designed for NASCAR racers.

The third picture is a different 63 427 Mystery motor.
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  #14  
Old Jul 7th, 12, 9:39 PM
Bunz-T Bunz-T is online now
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Default Re: Extremely Rare Chevelle SS GM3 Z16 427 Mystery Motor

Quote:
Originally Posted by jackie schmidt View Post
Well, heck, Sonny, that's what I get for not graduating the 5th grade.
Thats OK Jackie, if you were up here in Daingerfield and could start on the football team we would put you in the resource room where grades do not count . Then you would be almost guaranteed a D1 education for free.
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