does any one know what the casting # was on the 427 block and heads, on the mystery 427,
Thanks Dave
Thanks Dave
Mystery 427
- Thread starter cranesperformance
- Start date
was that the same for the heads and block,
Thanks Cecil,
I have a friend that has a origial car that was out of Tampa FL, I think it was called thunder, he is trying pit all the correct parts with the car, I think I found him a NOS block,
"The Mystery Motor that was photographed for the article (there are
pics of the casting numbers) caries a casting number of
0-217199.... the "0" denotes a pre production casting.
Also cast in the block is 9-13-62... the date of Sept 13, 1962 in standard short abreviated form.... which is the date the block was cast.
Each head is 25 lbs lighter than it's Big Block Mark IV
brother.
In a pre Daytona dyno test.. the 427 Myster Motor made 620 hp
with a single Holley on a 180 degree high rise aluminum manifold.
The Valves on the Mystery Motors heads were 2.19 Int and 1.72 Ex.
Chambers were very similar to the 65 to 70 Mark IV closed wedge
type heads. The heads were dubbed by early writers as "Porcupine"
heads but were officially called "Canted Valve" heads. Pop up pistons
gave the Mystery Motor a 12.4:1 compression ratio before milling.
The stroke was 3.65 inches and the rocker ratio was 1.75:1.
The Mystery Motor was said to be GM's test bed for screw in rocker
studs.
It is believed by Mystery Motor experts that 18 engines were produced by GM.
There were 4 different intake manifolds developed for the engine..
all were 180 degree design. Smokey Yunick stated the best of the
4 designs was casting number 0-232166.
The 12.4:1 pistons are listed as part # 0-233239
Here are the head flow cfm numbers provided by Valley Head Service
tested a 28 inches.
LIFT..........INT..........EXH
.100..........73.2.........73.2
.200..........122.4.......122.4
.300..........234.0.......147.5
.400..........277.8.......177.4
.500..........300.8.......196.2
.600..........328.0.......210.3
.700..........341.2.......221.0
The Exhaust ports were round... cast iron exahaust manifolds had
2inch primaries and were 33 inches long... they dumped into a
4 inch diameter 26 inch long collector."
All information listed above came from Drag Racer Magazine-
July of 2006.. Volume 10, No.4 pp 60-67... web address is
http://www.dragracermag.com
pics of the casting numbers) caries a casting number of
0-217199.... the "0" denotes a pre production casting.
Also cast in the block is 9-13-62... the date of Sept 13, 1962 in standard short abreviated form.... which is the date the block was cast.
Each head is 25 lbs lighter than it's Big Block Mark IV
brother.
In a pre Daytona dyno test.. the 427 Myster Motor made 620 hp
with a single Holley on a 180 degree high rise aluminum manifold.
The Valves on the Mystery Motors heads were 2.19 Int and 1.72 Ex.
Chambers were very similar to the 65 to 70 Mark IV closed wedge
type heads. The heads were dubbed by early writers as "Porcupine"
heads but were officially called "Canted Valve" heads. Pop up pistons
gave the Mystery Motor a 12.4:1 compression ratio before milling.
The stroke was 3.65 inches and the rocker ratio was 1.75:1.
The Mystery Motor was said to be GM's test bed for screw in rocker
studs.
It is believed by Mystery Motor experts that 18 engines were produced by GM.
There were 4 different intake manifolds developed for the engine..
all were 180 degree design. Smokey Yunick stated the best of the
4 designs was casting number 0-232166.
The 12.4:1 pistons are listed as part # 0-233239
Here are the head flow cfm numbers provided by Valley Head Service
tested a 28 inches.
LIFT..........INT..........EXH
.100..........73.2.........73.2
.200..........122.4.......122.4
.300..........234.0.......147.5
.400..........277.8.......177.4
.500..........300.8.......196.2
.600..........328.0.......210.3
.700..........341.2.......221.0
The Exhaust ports were round... cast iron exahaust manifolds had
2inch primaries and were 33 inches long... they dumped into a
4 inch diameter 26 inch long collector."
All information listed above came from Drag Racer Magazine-
July of 2006.. Volume 10, No.4 pp 60-67... web address is
http://www.dragracermag.com
Wow, that was great, thanks my friend will be very happy to see all of that info.
Dave
Dave
wow that is a shame to ruine parts like that, I know some people that worked for GM back then, they had to take a sludge hammer to allot of rare blocks, when they think back all the part they destroied, it make them sick.