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Flat top pistons with l92 heads

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Old Aug 30, 2012 | 06:42 AM
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Default Flat top pistons with l92 heads

Do the pistons need to be fly cut? I know the cam has to be the deciding factor but I'm looking at around a 228/230+ or bigger duration and 600 or bigger lift.
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Old Aug 30, 2012 | 07:42 AM
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Only way to really know is to measure.
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Old Aug 30, 2012 | 08:08 AM
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I was told any thing over 230dur with a 112 or tighter lsa will be pushing it with the big intake valve
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Old Aug 30, 2012 | 09:12 AM
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Call up Geoff from EPS and he'll get you taken care of. You can fit a pretty big cam without flycutting....
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Old Aug 30, 2012 | 09:41 AM
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Originally Posted by 9sectruck
I was told any thing over 230dur with a 112 or tighter lsa will be pushing it with the big intake valve
You still have a lot of room on the exhaust side on LS3/L92 heads, so LSA isn't as much of a factor as the intake centerline and intake duration is!
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Old Apr 26, 2013 | 04:34 PM
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Bumping this back up. Geoff at eps got me hooked up with a 224 236 113 plus 2 cam. Problem is, I got the itch for a turbo so I ended uo calling up huron speed and getting a 78mm turbo. Hopefully it won't pop!
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Old Apr 26, 2013 | 05:30 PM
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fyi i am running a lq4 (with ls2 pistons and rods) .011 out of the hole with unmilled ls3 heads and factory ls3 head gaskets (i believe its .051 crushed?)
my cam is,
INTAKE 234@50 / LIFT .628/center line 108
EXHAUST 250@50 / LIFT .621/center line 116
lobe seperation 112+4

and i fly cut .080 on both the intake and exhaust but i could have gotten away with less... maybe could have went .065 exhaust and .050 on the intake...
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