Casting my own aluminum head

1941 - 1945, MB, GPW modifications, sugestions, and ideas, official MWO's and unofficial WWII field mods NO EBAY or COMMERCIAL SALES.
Tankboym3
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Re: Casting my own aluminum head

Post by Tankboym3 » Fri Feb 12, 2016 7:46 am

So here is what I did to make some more power. .030 over bore on the block, counterweighted crank with a gear drive cam,full port job on the intake and exhaust side, this includes turning down the tops of the valve guides as they
dual carb 1.JPGtake up a lot of port room. Three angel valve job on face and seats with a forth angle cut on the head of the valve to improve flow. Late model 7.0 compression head cut to give 7.8 to 1. ported F-head exhaust manifold with 1 7/8 exhaust all the way out. Dual YF cabs on a manifold I built. Paper air filter in stock assembly. Motor also has full flow oil filter, all the oil leaves the block goes through a hidden spin on filter and back into the block. Motor runs strong, acceleration is better but it is the torque that is way improved. on hard pulls the power doesn't fall off like a stock 134. attachment=1]dual carb 1.JPG
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Tankboym3
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Re: Casting my own aluminum head

Post by Tankboym3 » Fri Feb 12, 2016 7:58 am

Don't know why my whole message did not post on the last one but here is all the text.

So here is what I did to make some more power. .030 over bore on the block, counterweighted crank with a gear drive cam,full port job on the intake and exhaust side, this includes turning down the tops of the valve guides as they take up a lot of port room. Three angel valve job on face and seats with a forth angle cut on the head of the valve to improve flow. Late model 7.0 compression head cut to give 7.8 to 1. ported F-head exhaust manifold with 1 7/8 exhaust all the way out. Dual YF cabs on a manifold I built. Paper air filter in stock assembly. Motor also has full flow oil filter, all the oil leaves the block goes through a hidden spin on filter and back into the block. Motor runs strong, acceleration is better but it is the torque that is way improved. on hard pulls the power doesn't fall off like a stock 134.
42 MB
43 t-24 weasel
44 Converto
M4A1 Sherman Commander/driver
M3A3 Stuart Commander/driver

Seff
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Re: Casting my own aluminum head

Post by Seff » Fri Feb 12, 2016 8:49 am

Sounds like awesome work, and what I'd do too, along with the alum head.

So far I'm prioritizing getting the jeep back together and working, then I'll start work on this project.

Seff
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Re: Casting my own aluminum head

Post by Seff » Thu Mar 31, 2016 12:43 pm

Our second semester group project will be concerned with fitting a higher compression head on my jeep engine. I've obtained a ribbed iron head for $35 shipped with a little gasket surface erosion that will get milled off anyway. This head will be used for testing for the project, and afterwards cut up for casting work on the aluminum head.

Seff
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Re: Casting my own aluminum head

Post by Seff » Tue Apr 19, 2016 9:25 am

Calculations so far show that to achieve 8:1 compression, I would have to shave a stock head 0.11".

Fortyeight2A
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Re: Casting my own aluminum head

Post by Fortyeight2A » Wed Apr 20, 2016 8:29 pm

Does anybody know if Offenhauser ever made an aluminum head for a Go-Devil?
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Seff
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Re: Casting my own aluminum head

Post by Seff » Wed Apr 20, 2016 10:00 pm

Hickey and Chuchua did (same head with different names on them).

Fortyeight2A
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Re: Casting my own aluminum head

Post by Fortyeight2A » Mon Apr 25, 2016 7:07 pm

I did know about those two, but I was wondering, since Offy made heads for the Ford V-8, might they also have made them for the Go-Devil. My first Jeep had a Buick V-6 with an Offy adapter between the T-90 and the Buick bellhousing. I think it would be cool to have an Offy aluminum head, if possible.

Seff
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Re: Casting my own aluminum head

Post by Seff » Mon Apr 25, 2016 10:17 pm

It would. I have just never heard of it.

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DanoZeman
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Re: Casting my own aluminum head

Post by DanoZeman » Mon May 02, 2016 11:55 am

Isnt the willy willy head aluminum and fits our motors
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Seff
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Re: Casting my own aluminum head

Post by Seff » Mon May 02, 2016 12:30 pm

It is. I mailed them half a year ago and got no reply. Their website doesn't seem like it's been updated in a long time.

Has anyone actually bought and received a Willy Willy head?

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Re: Casting my own aluminum head

Post by Seff » Wed May 11, 2016 12:41 pm

I shaved a rusty and pitted stock 800376 head 2.5 mm (roughly 0.1") and achieved 7.84:1 compression. For testing purposes nothing has been changed on the engine apart from this. The car was dynoed before the change (40 HP and 55 Nm), and will be dynoed with this new head as well. After this dyno run it will be given a tune-up to see how much timing it will take.

Fortyeight2A
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Re: Casting my own aluminum head

Post by Fortyeight2A » Wed May 11, 2016 7:41 pm

Interesting. Let us know how it goes, please.
Is it true real Jeeps have flat fenders?
Alone cannot you it resist!

Marty, SoCal
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Re: Casting my own aluminum head

Post by Marty, SoCal » Sat May 14, 2016 6:00 am

40 HP at the rear wheels was exactly what my GPW put out with the stock engine! It will be interesting to see how much better it does with the milled stock head. The 8-1 Chuchua/Hickey head added 7 hp and 20lbs/ft. torque over stock on mine.
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Seff
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Re: Casting my own aluminum head

Post by Seff » Sat May 14, 2016 6:51 am

Mine was 23 hp on the wheels and 40 on the engine.


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