Looking to buy 7X Parts....

[Deleted User]

I know its a shot in the dark.... but does anyone have a line on any original

7X parts? Whatcha got? My e-mail is hetnptelcel@aol.com (drop the het)

Thanks, Niels

Ol racer

FYI

There may be a few original 7x parts out there like camshafts, but Randy Maas is your best contact for duplicating key 7x components these days. In the past Clifford was but I dont think they have much for Hudson anymore.

dougson

The only "rare" or not reproduced parts would be related to exhaust (exhaust manifold, if there really was a "7X exhaust"), and an actual block. Based on many previous discussions on this site, having an actual 7X engine really means having a correct block. Everything else is fairly unimportant. Cams have been reproduced (see below); finding an authentic "7X flat top" or "Super 7X" would be tough although the '56 hydraulic cam is essentially a 7X flat top. The valves have been reproduced, used heads are available, superior timing chains are available. Have I missed something? I don't think so. The twin-H was an option on any engine.

[Deleted User]

There was indeed a factory 7X exhaust / header pipe. There was also a large capacity gas tank, severe duty brake drums and severe duty rear end. As you mentioned, there is the block aswell. Perhaps others with more expertise can chime in.

[Deleted User]

Yes, I have a 7x exhaust manifold setup, even a 7X block,



Randy

[Deleted User]

Randy, Didn't the '54 308 block incorporate many of the 7X milling tricks, as standard. Or did I misread the article?
Thanks
Bob Hickson

[Deleted User]

maasfh wrote:

Yes, I have a 7x exhaust manifold setup, even a 7X block,



Randy

Besides a special serial number and or even in some circumstances, the lack of a serial number, how does one determine an original 7X block?

dougson

The '55 and '56 blocks came as close to a "7X" as any 308. They had the deepest valve reliefs, their heads basically had 262 chamber size to attain 7.5 - 1 compression, 1/2" head bolts (7X used studs), and, again, the '56 had the "7X flat top" cam. Engine was rated at 175 hp with twin-H. The '54 block had shallower valve reliefs and 7/16" head bolts, and, originally, the "7X flat top" cam. It was rated at 170 with twin-H.

hudsontech

The twin-H exhaust manifold is listed in the 1948-1954 parts manual, part number 307604 as Kit - Twin Exhaust Manifold for 262-308-7X engines.



I don't have that document on my web site, but I will shortly - along with other severe usage bulletins. I think I sniped most of those out of Jack Millers Hornet racing book.



If y'all don't have this book on your shelves, it's time to spring for a copy. Jacks done a great job presenting the glory years of Hudson stock car racing.



Hudsonly,

Alex Burr

Memphis, TN

Lee ODell

nhp1127 wrote:

Besides a special serial number and or even in some circumstances, the lack of a serial number, how does one determine an original 7X block?

According to Jack Miller's book, TOTAL DOMINATION, the 7X engine did not have a serial number. They had hand painted letters "EH" on the side of the block.



The parts merchandising bulletin, stock no. SP-126 Number 12 dated 8-3-53 ..."announces the availability of the NEW HIGH PERFORMANCE 7X SKELETON ENGINE ASSEMBLY...adaptable to all 7A, 7B and 7C Hornet Models." The bulletin lists all the components of the engine and part number.



P/N C 309395 Skeleton Engine - 7X List $385, Wholesale $336.88, Dealer Net $288.75



Consists of the following major parts:

cylinder assembly (Hornet)

cylinder head assembly

cylinder head gasket

camshaft

crankshaft

inlet valves

exhaust valves

pistons (knurlized)

connecting rods

timing chain

crankshaft sprocket

camshaft spprocket

valve springs

valve tappets & adjusting screws



This information is on page 146 and 147 of Jack's book. There are other bulletins in his book that list individual parts with part numbers.



There were axle assemblies available with 6 different gear ratios: 3.07, 3.31, 3.53, 3.92, 4.27, and 4.55.



This book has a wealth of information on the History of Hudsons during its glory years of racing. It is one of the top must have books, for those of us interested in Hudsons.



Lee

SuperDave

For a look at what was called "severe duty" parts. Check page 329 through 333 of the 48-54 Master Parts catalog. Group Z1. A great deal of these parts were developed and offered for racing. Being in the catalog and offered to the public made them legal for most sanctioning bodies. There are parts for jets as well.

dougson

nhp1127 wrote:

I know its a shot in the dark.... but does anyone have a line on any original

7X parts? Whatcha got? My e-mail is hetnptelcel@aol.com (drop the het)

Thanks, Niels

Just curious, did you find any parts, besides those mentioned here. Be interesting to know what's out there.

[Deleted User]

Not yet. Just know of the repo exhaust splitter.