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View Full Version : PM7 pistons + nitrous = really that bad ?


Orion
07-28-2006, 04:09 AM
I heard that the PM7/PG6b pistons don't like nitrous too well. As I'm planning on running a direct port kit on my carb'ed setup I'd like to know for sure.

The block is a D16z1 (9,3:1 compression ratio) so I'm guessing it has the regular flat tops stock. Am I better off skimming the head and using a 2-layer y8 gasket to bump compression ? I'm looking for 11:1 or something along that.

NEP-tuningalltheway
07-28-2006, 09:05 AM
yea man p29s/m7s have weak ringlands so they dont respond well to spray might as well just use a y8 hg and mill the head

Orion
07-29-2006, 07:04 AM
OK, thanks !

remoer
07-29-2006, 08:39 AM
damd that sucks on that :TD: