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Re: Engine builders... How much crank end play
[Re: DemonDust]
#373059
07/12/09 11:27 AM
07/12/09 11:27 AM
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Joined: Apr 2005
Posts: 1,880
USA
Ron Silva
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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Stock Small Block thrust clearance spec is .002 - .007 Max Allowable .010
SRT DEMON ONE SEAT
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Re: Engine builders... How much crank end play
[Re: DemonDust]
#373060
07/12/09 11:31 AM
07/12/09 11:31 AM
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Joined: Nov 2003
Posts: 6,293
Rock Springs
Bob_Coomer
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master
Joined: Nov 2003
Posts: 6,293
Rock Springs
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My last engine was a Indy Maxx block, that was on the tight side. About .004-.0045 Thats about as tight as I would ever run one, it ran great with no problems. I guess .006-.009 would be idea.  BTW How is the work out there? Our hall has very little going on.. Bob J.I.W. Local 769 Ashland Ky
[color:"red"]65 Hemi Belvedere coming soon [/color]
[color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
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Re: Engine builders... How much crank end play
[Re: Hemi Allstate]
#373063
07/12/09 11:47 AM
07/12/09 11:47 AM
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Joined: Apr 2005
Posts: 1,880
USA
Ron Silva
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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Yes .002 That is what the Factory Service Manual says. So, .002 would be good for a stock 160 horse 318 motor or..........
SRT DEMON ONE SEAT
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Re: Engine builders... How much crank end play
[Re: Bob_Coomer]
#373064
07/12/09 12:21 PM
07/12/09 12:21 PM
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Joined: Feb 2005
Posts: 5,207
Menomonee Falls
DemonDust
OP
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OP
master
Joined: Feb 2005
Posts: 5,207
Menomonee Falls
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Quote:
My last engine was a Indy Maxx block, that was on the tight side. About .004-.0045 Thats about as tight as I would ever run one, it ran great with no problems. I guess .006-.009 would be idea.
BTW
How is the work out there? Our hall has very little going on..
Bob
J.I.W.
Local 769 Ashland Ky
Very dead here. I worked about 6 weeks this year here and there. My bank acct is def feeling it.
They say it's supposed to get better next year  I've been trying to scrape up cash jobs but they are very hard to find as well..
JIW
Local 383 Madison WI
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Re: Engine builders... How much crank end play
[Re: DemonDust]
#373067
07/12/09 12:39 PM
07/12/09 12:39 PM
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Joined: Apr 2005
Posts: 1,880
USA
Ron Silva
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top fuel
Joined: Apr 2005
Posts: 1,880
USA
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Almost any clearance in a motor, MORE would be better.
But just so you know, I ran my 474 CI R3 W9 Motor at .002. It went to .004 after I started it and drove it easy for a few miles and then never got any worse. I would not run a High HP motor at .002 if it is in a Race Car and you are going to lean on it right away.
On the other end of the specrum, the thrust clearance can be quite a bit before anything bad happens. The real limit here is the crank counterweights hitting the block. So if you had a new bearing and the crank thrust surface was good you could easily run it at .010- .012 or even more.
I just took one apart that I was racing the day before and it was .018 with no ill effects (other than me finding copper in the oil filter). You would have never known it.
SRT DEMON ONE SEAT
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