Landracing Forum
Tech Information => Technical Discussion => Topic started by: coolgent01 on July 06, 2010, 06:55:56 PM
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Knowledgeable friends..... I remember in the past of someone cutting and welding back together Chevy heads to make a single 6 cylinder head...... I think this was in the altered ranks.....Need to know if this is advisable or is their a better way.Working on a roadster or maybe s smaller liner..... I am in the northwest,and wont make it this year ,maybe next.....Any help would be appreciated..................Thanks
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Yes it has been done on both Ford & Chevrolet in-line 6 engines. Mainly for drag racing as the durability may be a question for LSR use. The heads are cut in sections and furnaced brazed together if I remember correctly. You could not do this in Production or GT as the rules require heads with the original port-valve arrangement.
Hope this helps.
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Contact forum member "Slyonejr"....his dad Sherman Sly was the first to weld Ford heads together back in the 60's. He is still actively racing in nhra and still welding Chev and Ford heads together for customers...building intakes and more.
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With the flood of aluminum heads around now I might look into some of them rather then deal with welding iron. What brand of six are we talking about here?
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Depends on what engine you are running. If you plan on going with the Ford 300 six, there is a Ford Motorsports cylinder head that Alan Johnson has put together, based off of the old Cleveland heads and the ports based off of the SBC canted valve head, think it might actually have a Ford part number. I have seen several of the Chevy and Ford heads cut up and furnace brazed together in the back yard. The big trick right now in Competition eliminator if you are going to run the Chevy six is to run the new DOHC motor like is in the Trailblazers or if you are going with the older cam in block motors, there are several cylinder heads that are "stock" that flow up to 420 cfm with the original port configuration. I know of a couple of people that have taken the Chevy canted valve small block head in aluminum, cut them into six individual sections, heliarced them back together to get the bore spacing right and put them on like a 250 or a 292 Chevy six. If you are really set on having a cast iron head, just PM me and I can put you in touch with several people that can help out with which heads to use, welding, and porting them.
Jeff
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It's a lot harder than simply welding a couple of aluminum heads together. The intake and exhaust manifolds and a side plate must be custom built. The block will have to be plugged and the new head bolt pattern re-drilled.The distributor will be very close to the bottom of the intake manifold. If you do all that you will have a solid engine. Be forewarned though, the lifters will be at an angle. I asked a question on turbo tube sizing, there's a few pictures there. As far as I know, Leo Santucci is the only one currently running this set up. The Vortec 4200 is a killer engine and in my opinion, a better way to go. Let me know if you'd like more details. http://www.landracing.com/forum/index.php/topic,7501.0.html
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The Selfs in Durant OK do pretty well with the 4200 also
I would start with the late model heads with the Metal valve covers
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I could agreed that it might be defends on the engine you are running. It is because of the flow that runs into a section that could be comfortable. And we can think that having a welding together can made a good part of the exhaust system.
I am sure I can smell SPAM!!!!!!!
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Okay, all right already -- I've deleted the account and banned the guy, and now just have to find the rest of the spamposts.