Re: Positive vs. negative piston deck height
[Re: Plumcrazyracing]
#173183
12/23/08 01:40 AM
12/23/08 01:40 AM
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Joined: Aug 2003
Posts: 43,127 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,127
Bend,OR USA
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all domes are usually above the top of the deck, the 1970 440 6 paks where .005 above and the early HP 340 (Pre 1972) called for a positive deck hieght also. The last legal 340 stocker I built had the pistons around .030 above, if I'm remembering the blueprint spec on the piston deck hieghts correctly
Last edited by Cab_Burge; 12/23/08 02:07 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Positive vs. negative piston deck height
[Re: Plumcrazyracing]
#173184
12/23/08 01:49 AM
12/23/08 01:49 AM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
Just got a call from my machine shop and learned that i needed take more off the block than anticipated. Pistons are now going to be about .008 out of the hole. I figure i will run a cometic compressed at about .051 to give a quench of .043. Any opinions as to having a positive deck hieght like this?
At that positive deck height .008 I wouldnt be concerned about a thing/nothing mike
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Re: Positive vs. negative piston deck height
[Re: JUST_N_TIME]
#173189
12/23/08 09:20 PM
12/23/08 09:20 PM
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Joined: Sep 2004
Posts: 1,828 houston texas
gremlinsteve
top fuel
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top fuel
Joined: Sep 2004
Posts: 1,828
houston texas
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heck..late model 6.1 3g hemis are 15 out of the hole new. the 5.7 is less...like 5
steve
if You Like Gremlinsteve. Gremlinsteve Likes You.
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Re: Positive vs. negative piston deck height
[Re: JUST_N_TIME]
#173190
12/23/08 09:55 PM
12/23/08 09:55 PM
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Joined: Dec 2008
Posts: 184 Central Coast
Plumcrazyracing
OP
member
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OP
member
Joined: Dec 2008
Posts: 184
Central Coast
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Closed chamber Indy's. .620 lift solid roller on my 493 stroked 440
Last edited by Plumcrazyracing; 12/23/08 10:00 PM.
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Re: Positive vs. negative piston deck height
[Re: Plumcrazyracing]
#173191
12/23/08 10:07 PM
12/23/08 10:07 PM
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Joined: Jan 2003
Posts: 6,591 Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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Quote:
Closed chamber Indy's. .620 lift solid roller on my 493 stroked 440
In that case that with that .008 positive piston deck height will cause you a whole heap of trouble.
Plum I , think that open vs closed question was directed a jburch. Plum you will be fine with a closed chamber, jburchs head if its closed is on the tight side. mike
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Re: Positive vs. negative piston deck height
[Re: BobR]
#173197
12/25/08 10:27 AM
12/25/08 10:27 AM
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Joined: Sep 2003
Posts: 1,397 Toronto Ontario, Can
Glen440
pro stock
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pro stock
Joined: Sep 2003
Posts: 1,397
Toronto Ontario, Can
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My 511 was originally .023 above deck. My 400 block was not close to square. Every piston was a different height till I had the machine shop square it. I fixed it with a .062 head gasket.
My custom pistons that are in it now have .025 less pin height to put them -.002.
87 dakota 6.1 hemi
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