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COO86L · 08-12-2016, 02:00 PM

JE Pistons sell 13.5:1 CR pistons ;D

If/when I build my engine, I'll be trying to stick as close to stock CR as possible because a lot of the tuners these days know what they are doing with this engine now to not blow it up as easy.

There is a tuner here in Aus that regularly does at least 300kw at the wheels (on his dyno that would be about 470hp on a dynojet) on stock internals. Unfortunately he doesn't (refuses) to use EcuTek.

IMHO going 10:1 would be a step backwards as this engine's fuel management strategy allows us to run quite high compression from stock etc. Going 10:1 would be like putting an EJ engine in. Good, but old tech ;D

In conclusion, higher CR is good if you are able to run E85 mostly, and/or have a very competent tuner. Otherwise 10:1 isn't terrible, but it's a backward step.

08-12-2016, 02:00 PM	#3
COO86L Senior Member Join Date: Dec 2015 Drives: 2015 86 GTS + Mitsi Lancer GSR Location: Lismore AUS Posts: 215 Thanks: 127 Thanked 93 Times in 68 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	JE Pistons sell 13.5:1 CR pistons ;D If/when I build my engine, I'll be trying to stick as close to stock CR as possible because a lot of the tuners these days know what they are doing with this engine now to not blow it up as easy. There is a tuner here in Aus that regularly does at least 300kw at the wheels (on his dyno that would be about 470hp on a dynojet) on stock internals. Unfortunately he doesn't (refuses) to use EcuTek. IMHO going 10:1 would be a step backwards as this engine's fuel management strategy allows us to run quite high compression from stock etc. Going 10:1 would be like putting an EJ engine in. Good, but old tech ;D In conclusion, higher CR is good if you are able to run E85 mostly, and/or have a very competent tuner. Otherwise 10:1 isn't terrible, but it's a backward step.