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AZKCMale Offline
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Post Icon Posted: Oct. 11 2004,5:27 pm Post # 1 see this member send this member a private message  quote this post in reply
Talk to Larry today  :good The head that I junked last is garbage he says somebody focked the ports and pockets up so bad(I thought they were stock when I got them off EBay)its not worth fixin :cry The 049's I got off EBay are getting new stainless valves and new hardend seats and one of his multi angle valve jobs. He also says the stock OE pistons don't have enough clearance for the cam I'm runnin. So now its time for pistons  :banghead I thought .575 lift on a big block wasn't that much  :stupid

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GoFastRacerMale Offline
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Post Icon Posted: Oct. 12 2004,5:55 am Post # 2 see this member send this member a private message  quote this post in reply
Cool, sounds like you're going to have a good set of heads!. :good The pistons you have are not for a performance deal that's why they won't accept any lift!. The right piston will allow .700 lift at 0 deck with a steel shim gasket to keep the quench area tight which makes horsepower which is a key factor in making power with low compression!.. :good
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AZKCMale Offline
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Post Icon Posted: Oct. 12 2004,3:56 pm Post # 3 see this member send this member a private message  quote this post in reply
Quote (GoFastRacer @ Oct. 12 2004,5:55 am)
The pistons you have are not for a performance deal that's why they won't accept any lift!. The right piston will allow .700 lift at 0 deck with a steel shim gasket to keep the quench area tight which makes horsepower which is a key factor in making power with low compression!.. :good

Whats weird is that the original motor I built had no valve clearance problems, although it did have crankshaft probs at about 15 hours. But this was a different block and pistons that ate the 2 heads with same cam :stupid

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GoFastRacerMale Offline
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Post Icon Posted: Oct. 12 2004,7:25 pm Post # 4 see this member send this member a private message  quote this post in reply
"But this was a different block and pistons"

There ya go, and you wern't using 049's either right!.. :) BTW, what are you going to use for pistons this time??.. :)
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AZKCMale Offline
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Post Icon Posted: Oct. 13 2004,7:04 am Post # 5 see this member send this member a private message  quote this post in reply
Was using 781's on this last one. The pistons weren't marked that I could see, I pretty sure their just .040 OE flat tops.

I took the other head off last night(Larry's needs the springs) and found some more marks where the intake valves were hitting the pistons, and had some metal garbage in #4 hole stuck in the top of the piston (looks like pieces of a compression ring). The #2 piston had something go through and beat it up also :stupid

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GoFastRacerMale Offline
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Post Icon Posted: Oct. 13 2004,8:52 pm Post # 6 see this member send this member a private message  quote this post in reply
Hope those are good springs and that wasn't the reason for the valve tapping the piston!. :eek If you had a broken ring in a fresh motor it was probably from the end gap being too tight or a ring land clearance issue or maybe you didn't have enough water going thru the block on initial fire and the rings got hot!..The rest could be from junk traveling thru from one cylinder to the other!.. :rolleyes

Edited by GoFastRacer on Oct. 13 2004,8:54 pm
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