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LG G5X4,Afr 205's, and compression

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Old 12-10-2006, 05:01 AM
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Default LG G5X4,Afr 205's, and compression

I am going to build my 383 stroker soon and before i buy my pistons I was wondering with a LG G5X4 cam,Afr 205's what we will be the best compression ratio for this and I also have 150 wet shot I will use some times with this combo.
Old 12-10-2006, 07:54 AM
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id call LG and see what they say but I bet their going to say 11:25.1 - 11:5.1, if you want to run 93 octane.
Old 12-10-2006, 08:50 AM
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Is it the 114 or the 112 LSA?
Old 12-10-2006, 10:04 AM
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114 or 112 LSA sorry I dont understand what you mean?
Old 12-10-2006, 10:11 AM
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The X4 is on a 111 LSA. If you run a 59cc head with a .040 head gasket thickness and you have a 1cc valve relief per cylinder then your compression ratio is 11.45:1.
Old 12-10-2006, 11:44 AM
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Originally Posted by purdueranger
The X4 is on a 111 LSA. If you run a 59cc head with a .040 head gasket thickness and you have a 1cc valve relief per cylinder then your compression ratio is 11.45:1.
Sorry, I goofed, I read it as X3, but with setup you stated on stock block SCR is ~11.65 (assuming piston deck height is -.007 {out})
Old 12-10-2006, 12:14 PM
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Originally Posted by PREDATOR-Z
Sorry, I goofed, I read it as X3, but with setup you stated on stock block SCR is ~11.65 (assuming piston deck height is -.007 {out})

Opps, I have been so used to everything having 0 deck for engineering or ICEs that I forgot to add that -.007 into my equations.
Old 12-10-2006, 12:49 PM
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ok....this is kinda stealing his thread, but how did u guys figure that out?
Old 12-10-2006, 12:51 PM
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http://www.rbracing-rsr.com/compstaticcalc.html
Old 12-10-2006, 01:10 PM
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thank you




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