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Tractor Pulling Discussion Forum

More questions on Power Block ID

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wundering

06-11-2006 20:30:11




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Thanks for the replies to my last post about this. My question is do the spark plugs on a power block sit un the block angled forward or something. The block on the B in question has angled spark plugs while the other B's in the class of the same era have the plugs straight in to the side of the block. How much advantage does a power block have over a stock one? Thanks for the help.




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730-LP

06-12-2006 20:10:28




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 Re: More questions on Power Block ID in reply to wundering, 06-11-2006 20:30:11  
I had a late B with a power block,heisler head and manifold and 71 carb.It had 190# compression and would show 48 to 50 HP on a dyno.



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WTW

06-12-2006 08:56:00




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 Re: More questions on Power Block ID in reply to wundering, 06-11-2006 20:30:11  
Yes, the spark plugs in a Power-Block do set in the block at an angle, just like a late model John Deere B block does. Are you looking at a late model John Deere block in an older model tractor? There are four different block used in the B tractor series! The late block as used in 1947-1952 models will bolt in an older tractors back to 1939 and the original head back to 1941 will fit it. The thing that is different and will tell you that it is a late block in an older tractor is look at the bottom edge of the angle iron frame rail and check to see if there is a 5/8" bolt in the bottom of each rail bolting bottom of block to rail. If the holes in the underside of frame lack these bolts and there is no threaded hole in block to put them into, you have a later John Deere block in a pre 1947 tractor. Check it out. DW

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teve

06-11-2006 23:49:49




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 Re: More questions on Power Block ID in reply to wundering, 06-11-2006 20:30:11  
more cubic inch, more compression, makes more power



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