Aluminum 4.3 l Chevy Vortec block WANTED

Discussion in 'Chevy' started by whiteknight, Jan 23, 2011.

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  1. Jan 23, 2011 #1

    whiteknight

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    Hello folks,

    Can anyone please tell me where I can find an Aluminum 4.3L Chevy Vortec block?

    Suggestions or assistance would be very appreciated. Thank You.
     
  2. Jan 24, 2011 #2

    Toobuilder

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    Check eBay. I see them every once in a while.
     
  3. Jan 24, 2011 #3

    Bigorneau

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    :gig: yes i can because i have one near ready to run for e-racer with an electronic distributor and with two carburators (and injection option to install) :lick:
     
  4. Jan 16, 2012 #4

    GrizzlyV6

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  5. Jan 16, 2012 #5

    stol

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    xxxx
     
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  6. Jan 16, 2012 #6

    Autodidact

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    I know that these heads are expensive and optimized for high rpm, but in some cases they're the only aluminum heads available. There must be some strategy that would make them usable; how bout extending a smaller diameter intake manifold runner down into the intake port?
     
  7. Jan 16, 2012 #7

    RJW

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    I don’t think a longer runner would help. The additional mass of the mixture in a long runner has to be accelerated before its momentum would help with cylinder filling after the piston passes bottom dead center (simplified explanation/understanding). At a given (low) rpm there is only so much force/pressure difference available to accomplish this. I'm pretty sure long runners would make low rpm power production even worse.

    You could fill the ports with plastic or add filler metal and reshape (this was sometimes done on the silly huge ports that were used on Boss and Cleveland Ford heads). But then you would still have the large valves to deal with.

    Though I like most engines I have a very hard time getting enthusiastic about 90-degree V6 motors. The configuration is very poor for any use and is particularly bad for aircraft use. It has serious vibration/balance issues. The issues are partially dealt with (for use in cars) by the addition of balance shafts. These shafts are not set up so far as I know to work at the usual speeds seen in airplane use. So in an airplane you end up with an engine that still has vibration issues and you get to haul around the extra weight of the balance shafts.

    A better choice for similar power production would be a small Ford V8 or a Rover/Olds/Buick. There are probably other small V8s out there too. Though these engines have to haul a lot of extra weight in the form of cross-plane cranks, they at least have good vibration characteristics.

    And what ever happened to the nice 60-degree V6? Are there any modern 60-degree pushrod V6s?

    Rob
     
  8. Jan 17, 2012 #8

    GrizzlyV6

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  9. Jan 17, 2012 #9

    Autodidact

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    There are several that I know of; Ford, Mopar, and GM all make 60° pushrod v6s. Ford makes one called the Vulcan v6 that has a great reputation for reliability but unfortunately has cast iron heads only, it's a 3.0L pushrod and light weight for an all cast iron engine - good Pietenpol material IMO. Ford also made a 60° v6 called the Cologne v6 that was designed in Germany - it was relatively light but all cast iron as well, pushrod 2.9L. There is a 4.0L 60° v6 from Ford that is based on one of the pushrod v6 blocks, it's vee mounted camshaft is now just a jackshaft and turns a chain at each end to drive single cams in each head - heads are aluminum and I like the 4.0L size, wish there was an aluminum block for it! Mopar made/makes a 60° pushrod v6 in 3.3L and 3.8L size and they have factory aluminum heads. GM also makes a 60° pushrod v6 that has from 2.8L to 3.4L and has both cast iron and aluminum heads from the wrecking yard (as opposed to GM Performance Parts) and there may be a 3.8L version of this engine with slightly larger bore center distances. The GM v6 60 engine supposedly has an aluminum block that can be had from GM Performance Parts:
    http://www.gmpartsdirect.com/performance_parts/store/catalog/Category.jhtmlCATID=175.html

    Part no. 10051141

    P.S., welcome to the forum, GrizzlyV6.
     
    Last edited: Jan 17, 2012
  10. Jan 17, 2012 #10

    GrizzlyV6

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  11. Jan 17, 2012 #11

    GrizzlyV6

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  12. Jan 19, 2012 #12

    GrizzlyV6

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  13. Jan 20, 2012 #13

    Autodidact

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  14. Jan 20, 2012 #14

    GrizzlyV6

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  15. Jan 20, 2012 #15

    Autodidact

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    That's the thing about internet forums, you can say you did some research but unless you say exactly what that research is, who's to know? I don't know you, hardly anyone here knows you, how could they? Yes you did mention Gm performance; on Ben's website he is very succinct in stating that the block on his engine cannot be had unless you have connections with Ford - he says "you can ask them and they will say that there isn't one".

    I do not think you are a goofball, this is not so serious as that.
     
    Last edited: Jan 20, 2012
  16. Jan 20, 2012 #16

    Autodidact

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    GrizzlyV6, something is screwy here. In the pdf document below from GM, the description of the v6 90 aluminum BowTie blocks says:

    Also, I found this page on the Summit site listing these blocks and with a delivery date of Jan. 30th, 2012:

    GM Performance 10134371 - GM Performance Aluminum 90 Degree V6 Engine Blocks - Overview - SummitRacing.com
     
  17. Jan 20, 2012 #17

    GrizzlyV6

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  18. Jan 20, 2012 #18

    Autodidact

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    Anyway, here's the pdf I got the quote from: http://www.s-series.org/htm/tech/GMPerfParts/136-139.pdf

    The block appears to be available from Summit. It's a nice piece if you can afford the 5,000$ kick in the rump.

    I think the people you talked to at GM Performance were snookerin' you. I don't want to argue either. That's a beautiful engine you have there.
     
  19. Jan 20, 2012 #19

    Autodidact

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  20. Jan 20, 2012 #20

    GrizzlyV6

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