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| | Good day by SDMickey - March 27th 2024 10:55 pm
| Lew Greger by MufflerMan Mike - March 27th 2024 5:15 pm
| | | Aluminium heads--- my head is spinning.,. | Joined: Aug 2012 Posts: 193 member | OP member Joined: Aug 2012 Posts: 193 | Hi guys, sorry for hitting you with more questions but here's my problem...
I've discovered some cracks on my 462624 heads (shock horror) and I want to replace them with a low cost aluminium option. My vehicle is an RV so I'm not looking for high performance. But I am looking for a low budget means of getting my rv back on the road. So I'm checking ebay, and a guy in the UK is selling a set of aluminium "Patriot style" sbc350 heads, angled plugs. The price is right and the cost of shipping is ok. My problem is I don't know if these will work for me? So I know they are 350 heads and will need some holes drilled for the steam ports, I'm ok with that. What I don't have a clue about is combustion chamber sizes, inlet & exhaust valve sizes, intake runner, exhaust runner, etc. I don't know what my 462624 heads are so I don't know what I need, or what gains or losses I could encounter if I bought and fitted the heads from ebay.
If I buy the set on ebay and drill the steam holes, will they work for me? What other information do I need to consider? I will need to buy & fit valves too as the listed heads are supplied bare.
Here is the ebay listing -
http://www.ebay.co.uk/itm/Small-Block-Chevy-Aluminum-Cylinder-Heads-SBC350-220cc-new-bare-angle-striaght-/271583108781?ssPageName=ADME:X:AAQ:GB:1123
Kevin | | | Re: Aluminium heads--- my head is spinning.,. | Joined: Aug 2012 Posts: 193 member | OP member Joined: Aug 2012 Posts: 193 | I measured the diameter of my valves. I've got 1.725 intake and 1.50 exhaust valves fitted to my heads. After a bit of internet searching, I believe these 462624 heads have 76cc combustion chambers?
Anybody want to skool me on cylinder heads?
Kevin | | | Re: Aluminium heads--- my head is spinning.,. | Joined: Aug 2012 Posts: 193 member | OP member Joined: Aug 2012 Posts: 193 | Of course, option B may be to re-use my heads and hope the crack doesn't propagate any further across the head... Not sure if you can see the crack but here is a photo - Closer -
Last edited by Blag; August 29th 2014 7:18 pm.
Kevin | | | Re: Aluminium heads--- my head is spinning.,. | Joined: Apr 2003 Posts: 7,662 Likes: 2 carpal tunnel | carpal tunnel Joined: Apr 2003 Posts: 7,662 Likes: 2 | you should be able to use the aluminum heads on your engine with no issues. The cracked cast iron heads are JUNK
Its a "Van Thing" A life style you have to LIVE to understand! Vintage Chevy Van Club
| | | Re: Aluminium heads--- my head is spinning.,. | Joined: Jun 2010 Posts: 12,847 Maniac | Maniac Joined: Jun 2010 Posts: 12,847 | you should be able to use the aluminum heads on your engine with no issues. The cracked cast iron heads are JUNK ...... Proud member: Shenandoah Valley Vans ............" REALITY IS JUST AN ELABORATE ILLUSION".................. | | | Re: Aluminium heads--- my head is spinning.,. | Joined: May 2007 Posts: 9,854 Likes: 8 Festerus Vannimus | Festerus Vannimus Joined: May 2007 Posts: 9,854 Likes: 8 | Agreed, the cracked heads are shot. They could be fixed, but not worth the expense that would be involved. . . . The aluminum heads will be fine for you. Sorry I do not under stand heads better so I can help SCHOOL you on them, but there are a lot of smart guys here who are happy to share knowlege, and I am sure they will be along some time soon, some of them with more information than you want ! lol
My van : 1989 Ford E-150 Econoline, currently named “WOLF-DEN IIâ€
Founder & President of Sooner or Later United Truckers and PROUD TO BE A S.L.U.T. ! !
| | | Re: Aluminium heads--- my head is spinning.,. | Joined: Aug 2013 Posts: 112 member | member Joined: Aug 2013 Posts: 112 | You are running a 400 small block I take it. the 624 castings are 76 cc. If you go to the aluminum heads they are probably 64 cc. Do your homework. If you run the 64 cc heads your compression will go up a full point. better run 93 octane all the time. Vans are heavy and will ping much easier than a car. BUT !!! the 400 cubic inch will love the bigger , better flowing heads. Stock or not. Try to run a coolant crossover tube in the rear of the intake. my opinion. Steve if they offer them in 68 or 72 cc buy the bigger chamber heads
Last edited by keech; August 31st 2014 8:07 pm.
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