Re: Help-440 Compression Ratio
[Re: John_Kunkel]
#1697923
11/12/14 04:20 PM
11/12/14 04:20 PM
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Joined: Jan 2003
Posts: 75,012
U.S.S.A.
JohnRR
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I Win
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Quote:
The effective dome on the 2295+30 is 12.1 cc's.
I just ran numbers, if the piston is .020 below the deck and with that volume of a dome you need a head gasket volume of 24.66cc to get you down to 10.75 .... for a 4.40 bore diameter gasket it will need to be .099 thick ...
Good luck ...
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Re: Help-440 Compression Ratio
[Re: JohnRR]
#1697925
11/12/14 04:32 PM
11/12/14 04:32 PM
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Joined: Jan 2007
Posts: 1,668
Mi,U.S.A.
mike s
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top fuel
Joined: Jan 2007
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Mi,U.S.A.
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Yup I did the same and got 11:06-1.Piston -.012.I just finished a similar engine for a guy two weeks back.Used .098 Cometic gaskets.
Leave the gun.......take the Cannoli's....Mike
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Re: Help-440 Compression Ratio
[Re: 572charger]
#1697932
11/13/14 05:38 PM
11/13/14 05:38 PM
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Joined: May 2011
Posts: 4,489
northern,Ohio,USA
Clanton
master
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master
Joined: May 2011
Posts: 4,489
northern,Ohio,USA
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Quote:
we used to machine the dome off of those 20 yrs ago !!! cheapist way out  even with the rod still on it !!! 
I agree and I believe you need to keep the piston thickness to about .250 at where you mill the piston.
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Re: Help-440 Compression Ratio
[Re: Clanton]
#1697933
11/13/14 06:36 PM
11/13/14 06:36 PM
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Joined: Jun 2006
Posts: 5,162
CT
GTX MATT
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master
Joined: Jun 2006
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CT
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Do those slugs really pump the compression up that much? I thought they had a pretty low compression height
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Help-440 Compression Ratio
[Re: 440PURSUIT]
#1697934
11/15/14 02:30 AM
11/15/14 02:30 AM
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Joined: Feb 2004
Posts: 240
Spring City , Pa.
SIKPUP
enthusiast
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enthusiast
Joined: Feb 2004
Posts: 240
Spring City , Pa.
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Quote:
I have another application for the heads. Different piston......
This Shortblock is together and balanced, so I will target other heads with different chamber to use short block with.
Please advise.....Head (volume)Recommendations with this "classic" piston ???????
Thanks
bump ... I have this same issue going on. I need to work with what I have.
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Re: Help-440 Compression Ratio
[Re: SIKPUP]
#1697935
11/15/14 12:12 PM
11/15/14 12:12 PM
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Joined: Feb 2005
Posts: 4,313
Prospect, PA
BSB67
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master
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Prospect, PA
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I think 84 cc will get you there assuming the piston is 0.050" in the hole, which should be close if the block is not cut too much.
Does anyone know how bad the interference is between the EDDY head and the 2295 piston, Is it workable?
Last edited by BSB67; 11/15/14 12:52 PM.
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Re: Help-440 Compression Ratio
[Re: firefighter3931]
#1697937
11/15/14 02:53 PM
11/15/14 02:53 PM
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Joined: Jan 2003
Posts: 75,012
U.S.S.A.
JohnRR
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I Win
Joined: Jan 2003
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Quote:
The 2295 will work with a closed chamber E-head. Those slugs sit approx .050 below deck and with a .040 gasket and 84cc chamber you're mid 10's for compression but quench is non existant. A Comp 294S clears the pistons with enough clearance for a street/strip type build (.080 intake & .100 exhaust) 
Piston to valve is somewhat limited due to the valve location being different between a stock head vs an RPM casting. If you wanted to run more cam then the pistons would require larger valve reliefs. 
Ron
Good info Ron
Most times those old bargain pistons aren't always that good a deal ...
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Re: Help-440 Compression Ratio
[Re: firefighter3931]
#1697938
11/15/14 03:27 PM
11/15/14 03:27 PM
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Joined: Feb 2005
Posts: 4,313
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,313
Prospect, PA
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Quote:
The 2295 will work with a closed chamber E-head. Those slugs sit approx .050 below deck and with a .040 gasket and 84cc chamber you're mid 10's for compression but quench is non existant. A Comp 294S clears the pistons with enough clearance for a street/strip type build (.080 intake & .100 exhaust)
Piston to valve is somewhat limited due to the valve location being different between a stock head vs an RPM casting. If you wanted to run more cam then the pistons would require larger valve reliefs.
Ron
I didn't know if the flatter chamber angle around the plug would hit the relatively sharp angle of the dome in that area.
Good to know that it clears.
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