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Eagle heads on a hellcat short block
#2334378
07/09/17 10:50 PM
07/09/17 10:50 PM
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Joined: Aug 2003
Posts: 3,245 Between a rock & a hard place
cudadoug
OP
master
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OP
master
Joined: Aug 2003
Posts: 3,245
Between a rock & a hard place
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I'm considering a hellcat crate shortblock for my gen 3 swap project to use with Eagle heads. My question is has anyone done this and the resulting piston to valve clearance?
I am being told that the Eagle heads on a 9:1 OE 5.7 will bump that to 11:1, but the piston to valve clearance will disappear.
Would the same be true for the hellcat shortblock??
Thanks in advance for your input!
Last edited by cudadoug; 07/09/17 10:51 PM.
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Re: Eagle heads on a hellcat short block
[Re: cudadoug]
#2334381
07/09/17 10:59 PM
07/09/17 10:59 PM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Im not sure on Hellcat piston. I think the valve position between an Apache/Hellcat head and an Eagle are identical. The Eagle has a smaller valve diameter than a Hellcat so you might actually gain piston to valve clearance. Like any engine build worth its salt, clay it anyway. Compression wise I dont think you would get much over 10.1 though since chamber cc isnt to much less than a Hellcat head.
Mopar to the bone!!!
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Re: Eagle heads on a hellcat short block
[Re: cudadoug]
#2335069
07/11/17 12:10 AM
07/11/17 12:10 AM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Hellcat has 9.5.1 Compression with IIRC a 70cc chamber, pretty sure the Hellcat head is same as Apache chamber wise. Eagle heads are 65cc chamber, so technically you're only reducing chamber volume 5cc instead of 20cc on an early 5.7 swap.
Mopar to the bone!!!
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Re: Eagle heads on a hellcat short block
[Re: dogdays]
#2337170
07/15/17 12:39 AM
07/15/17 12:39 AM
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Joined: Jun 2016
Posts: 170 Wisconsin
Medlock51
member
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member
Joined: Jun 2016
Posts: 170
Wisconsin
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Keep telling yourself that.....
R. I will... before I built my last blown early Hemi I talked to many of the best builders n the biz... everyone told me the same thing. If Gartlis tells me something about a Hemi I tend to agree...
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Re: Eagle heads on a hellcat short block
[Re: cudadoug]
#2337303
07/15/17 12:06 PM
07/15/17 12:06 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Compare combustion chambers before you extrapolate early hemi info to a Gen III. Not even the same. May as well used SBC thinking as it's just as relevant.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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