New Hudson High performance Aluminum Head now available

[Deleted User]

My 7X engine has the 232 head on it.... anyone know what the compression was on this set up?

[Deleted User]

9.2:1 as per factory engineering doc. But this depends on what head gasket you are using.

[Deleted User]

Hello

my donnation is to go whit pay pal

Kdancy

Note from EMI--

We will be pouring on Monday, the November 2nd. 2010.

(I think he meant Nov 1)

Lee ODell

nhp1127 wrote:

My 7X engine has the 232 head on it.... anyone know what the compression was on this set up?

What grade of gas are you using with the 7X engine? How much difference in power did you notice when the 232 head was installed? I put your license plate frame on the front of my 52 Honet. Looks good.

Lee O'Dell

ivanz62

I think those interested in this thread should be reminded that the "232" head casting originally intended for the Pacemaker and used on a "7X" engine by Hudson was machined to suit the job.
You cannot just stick a Pacemaker head on a Hornet with big valves and a "7X" cam. I am sure there are many in the Hudson world who can tell you of having to remove that 232 head from their Hornet because of pre-ignition problems. The "232 7X" head was stamped with a part number after it was machined. Check yours out Niels and tell us it you can find that number stamping. I have never seen an actual "7X" version of the 232 head and would love to know how Hudson machined them. Is there anyone who has one off they can photograph and measure for the club's interest (and mine!).

Hope so..............Ivan

[Deleted User]

ivanz62 wrote:

I think those interested in this thread should be reminded that the "232" head casting originally intended for the Pacemaker and used on a "7X" engine by Hudson was machined to suit the job.
You cannot just stick a Pacemaker head on a Hornet with big valves and a "7X" cam. I am sure there are many in the Hudson world who can tell you of having to remove that 232 head from their Hornet because of pre-ignition problems. The "232 7X" head was stamped with a part number after it was machined. Check yours out Niels and tell us it you can find that number stamping. I have never seen an actual "7X" version of the 232 head and would love to know how Hudson machined them. Is there anyone who has one off they can photograph and measure for the club's interest (and mine!).

Hope so..............Ivan

Hi Ivan,

The severe usage stamping on my 232 Head is 309291.... flat top cam is stamped severe usage 309742. Pistons are knurled 20 over from the factory. Has the big intake valves and block is ported and relieved from factory. 1/2" studs and has the factory header aswell.

I have a new BEST head gasket that I had purchased from Randy Mass as a back up. If someone from the club of excellent mechanical skill wants to remove the head for photography and replace it then I would be happy to support that.

To answer Lee's question, I have to run hi octane with octane booster so that it doesn't detonate or ping.

Lee ODell

Neils, thanks for the information about your engine and the gas rating needed.

Ivan, your tip on the 232 head to 308 engine saved me and others from making a big mistake.

I'll watch how this new aluminum head turns out.

Thank you both.

Lee O'Dell

[Deleted User]

Hello

do you have my donnation from pay pal?

Kdancy

Received a call from EMI yesterday pm, the first batch of new Hudson Aluminum heads have been cast and are going to be heat treated next. Said the casting turned out great.
Can't wait!:woohoo:

[Deleted User]

Pierre from France

Did not receive your donation through paypal. The following is a list of those donors I have received through paypal. Thank you very much. Every donation helps.
Ed Wood
Gary Tindal
Michael Paul
Kerry Dancy

Checks received:
Mike (Wa)
Chuck Vorse
R/Roger

Thank you, Randy

[Deleted User]

ah error mail???

hetmaasfh@ntslink.net good?

[Deleted User]

This is the most exciting thing I've seen in a long, long time!

I've just now got my computer straightened out and back online here.

Randy, I'll get in touch with you next week and send a donation the ol' fashioned way.

It will take me much longer to save up to buy a head, but its a new goal!

Kdancy

from Rudy Bennett--

The heads will be coming out of the Heat Treating on 11-8-2010 T-6

Unknown

Ivan ...

As you posted there is a difference between the OEM stock head and the head provided with the 7X engine. The attached file is from Rudy Bennett and the El Paso Hudsonites. It is Rudy's hope this will assist in understanding the differences.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
To all

We compared the Hudson stock 232 engine head to a modified 7X- 232 head, the following documents our findings.

There is only one area where the two heads differ and that is what I call the “eyebrow area of the combustion chamber. The comparisons are shown in attached pictures. Our measurements or each area is also provided.

STOCK HUDSON 232 HEAD
• 232-std head - 7/16 head bolts
• Combustion chamber is 80cc
• eyebrow depth into chamber is 0.1270 inch

HUDSON 7X 232 HEAD
• 232-7X head - 1/2 head bolts
• Combustion chamber is 84 cc
• eyebrow depth into chamber is 0.0885 inch





To identify the differences between heads we laid a head gasket on the head and marked the “eyebrow” area with a black marker. The “eyebrow” is the part between the valves that is Shaded by the black marker and it sticks out from the head gasket. The dimension of the two is listed above. The eyebrow is almost even with the fire ring gasket on the 7X.

The 7X head shown in the pictures and used for comparison to a stock 232 Hudson head is the ONLY part left from two different 7X engines owned by HETers here in west Texas. This head belonged to one of our local Hudson owners who drag raced Hudsons for many years.

The engine which contained this head was bought in 1953 from Willis O Donahue, Hudson Dealership in El Paso Texas. The cost for the engine was $385.00 as a long block. The engine consisted of a block ,Head, oil pan, front timing cover which was part numbered 7X Engine #C-309395 and contained Camshaft—309395. This engine was installed in Harry’s 49 4-door Hudson by George Brazill who worked for Willis at the time. For an extra $70.00 they installed a Twin H set-up Along with a set of homemade headers made by Harry. George later become an engine builder specializing in Hudson powered Dirt track cars.

After the installation of the 7X engine, Harry went out to the track and beat the heck out of my 54 hornet. Using this car and engine combination, he won many races challenging V8 Powered brand x cars on the strip and street.

Due to the big valves and the cam, plus the deep valve relief the 7X engine was a little slow off the line, but the at about 45-50 the Deep breathing 7X would show itself and take off like a Rocket.

I also had a 7X engine which was identical to Harry’s engine with the exception of the cam shaft which was a 309742 Flattop. Sadly, many years ago, both Harry’s and my 7X engine were scrapped by mistake.

Finally, we do not know why Hudson cast the heads with the eyebrow protrusions. But that eyebrow area can create a hot spot in the combustion chamber. It was our thought that this was not needed and so in the design of our new Hudson head eliminated this “eyebrow” from our head. The combustion chamber on our head is even with the head gasket edge. We would like to know if anyone reading this knows why this eyebrow was left on the OEM head. Anyone have any input on this eyebrow (mine had the 309742 Flattop)
Hope this helps the ones that asked for this info.

Rudy Bennett and the El Paso Texas Hudson guys.

ivanz62

Thanks for the pictures and the description. I am not sure I understand the measurement of the"eyebrow into the chamber". Is that how much sticks inside the "fire ring of the gasket?
Could you also measure the thickness of the two heads? And how far is it from the gasket surface to the flat over the intake valve where you have written "232"?

I appreciate all you are doing to unravel the mysteries of the 7X.
Cheers,
Ivan

super651

Ivan, Thats how much it sticks out past the Firering. And the head was milled .020 many years back wouthout taking a reading of the thickness factory thickness.
I dont understand the other reading that you need ?
Thanks Rudy

ivanz62

Rudy,

Looking to know how"deep" the chamber is. The optimal clearance over the inlet valve at full lift is an ongoing controversy in the hot rod flathead world. So knowing how deep the chamber is--clearly different at the intake and exhaust valves--is of interest. Of course, this is only half the picture. The "heavily relived 7X block" figures in as well. Some sink the big 7X valve seats deep into the block to get the clearance needed. Until we know what Hudson really did in the block, we won't have the total answer to what made the Hornets run so well. So I guess we're looking for that factory relieved block!
Cheers,
Ivan

[Deleted User]

This Thread is too long - please start a new one.