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Did I calculate this right?

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Old 08-23-2008, 05:11 PM
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Default Did I calculate this right?

Trying to figure out if I got the SR/DCR right.

cam @ .006 274/282
LSA 111
ICL 109

bore 3.900
stroke 3.622
rod length 6.098
deck height -.006
compressed head gasket thickness .0052 (wasnt sure on this value)
cylinder head chamber volume 62cc (using PRC 5.3 heads, wasn't positive read some different numbers)

I got a 10.99 compression ratio and a 8.65 dynamic ratio using those numbers, should be right, got the calculator off this site. Just depends on those numbers I suppose.
Old 08-23-2008, 05:24 PM
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i need the intake valve closing point (ABDC) after bottom dead center
Old 08-23-2008, 05:29 PM
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Ivc @ .006 = 66
Old 08-23-2008, 05:42 PM
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ummm 66 is way to much, what the hell kinda cam are you running? my ms4 was 56 abdc
Old 08-23-2008, 06:14 PM
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Its a 224/230 .609/.604 111 LSA 109 ICL cam on XFI lobes. I dont have, just ordered it, no cam card, just the numbers the program came up with, but they should be within a few degrees (1-3*) I think.
Old 08-23-2008, 06:29 PM
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Maybe you wanted the IVC @ .050, which says 41* I won't have the cam card, but plugging in other cam cards it comes within ~2 degrees putting in the duration/lift/lsa/advance
Old 08-24-2008, 08:06 PM
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well with all the numbers plugged in and 41 as ABDC intake valve closing point i come up with 11 scr and 10.1 dcr
Old 08-24-2008, 08:15 PM
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I think you meant to type .052 head gasket thickness. I got the almost exact same numbers as you, 10.96 SCR and 8.64 DCR.
Old 08-24-2008, 08:20 PM
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Yea I meant .052. I just wasn't positive if that would be the thickness I would have with the 5.3 heads? No big deal, I wanted to be above 8.00 DCR and it should be well above that.




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