b18b pistons (pr4)
I
Joined: Jan 2001
Posts: 56,525
Likes: 0
From: Westside til I die
Originally Posted by BrianDB1
Actually not true...
With stock bore & 3 layer head gasket (L = Layer):
Pistons...............1L.... |....2L... |... 3L
JDM B16 PR3's = 10.8:1 | 11.3:1 | 11.6:1
USDM B16 P30's = 11.0:1 | 11.6:1 | 11.9:1
JDM B16B PCT's = 11.7:1 | 12.0:1 | 12.3:1
USDM GSR P72's = 9.8:1 | 10.0:1 | 10.2:1
JDM GSR P72's = 10.1:1 | 10.6:1 | 10.8:1
USDM ITR P73's = 10.5:1 | 10.8:1 | 11.1:1
JDM ITR P73's = 11.0:1 | 11.4:1 | 11.7:1
With stock bore & 3 layer head gasket (L = Layer):
Pistons...............1L.... |....2L... |... 3L
JDM B16 PR3's = 10.8:1 | 11.3:1 | 11.6:1
USDM B16 P30's = 11.0:1 | 11.6:1 | 11.9:1
JDM B16B PCT's = 11.7:1 | 12.0:1 | 12.3:1
USDM GSR P72's = 9.8:1 | 10.0:1 | 10.2:1
JDM GSR P72's = 10.1:1 | 10.6:1 | 10.8:1
USDM ITR P73's = 10.5:1 | 10.8:1 | 11.1:1
JDM ITR P73's = 11.0:1 | 11.4:1 | 11.7:1
With USDM ITR pistons in your LS, you'll be at 10.8:1 compression...perfectly ok for pump gas. With the right tuning, I've seen 12:1 compression on 91 octane safely, daily driven.
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2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget
2015 Ford Mustang GT Fastback - Ingot Silver - 6M - Performance Package - Gibson Catback, JLT CAI, FR 47lb injectors, BAMA E85 tune, Eibach Sportline, BMR wheel hop kit, UPR oil separator, Steeda shifter bushing/bracket
Team B.O.B.® - Ballaz on a Budget
DAMIMRED
Joined: May 2002
Posts: 13,495
Likes: 0
From: Syracuse, NY
i thought it was backwards, glad that im not crazy....
here i was thinking "i think i know enough about how engines work to know that a thinner headgasket will yield higher c/r but maybe they just use really thing plies on multi-ply gaskets :dunno:"
here i was thinking "i think i know enough about how engines work to know that a thinner headgasket will yield higher c/r but maybe they just use really thing plies on multi-ply gaskets :dunno:"
