9:1 mostly stock sr question - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

626ls1240sx · 04-23-2013, 12:19 AM

I'm currently rebuilding my engine and I havent found an answer in regards to what I need to do to run 9:1 on my motor.

Mods are just 87mm 9:1 supertech pistons and a 1.1mm head gasket. Stock turbo and everything else. Do I need to change anything since I'm going to run 9:1 pistons?

ultimateirving · 04-23-2013, 12:03 PM

Not technically, just make sure you have a way to tune the motor for the higher compression.

Mikester · 04-23-2013, 12:08 PM

^^ +1. IIRC, there will be more potential for detonation with the higher compression; so like he said above, you will need a tune.

2muchboost · 04-23-2013, 12:12 PM

+3...engine management and tune will be key!

04-23-2013, 12:19 AM	#1
626ls1240sx Leaky Injector Join Date: Jan 2011 Location: Azusa Age: 34 Posts: 70 Trader Rating: (3) Feedback Score: 3 reviews	9:1 mostly stock sr question I'm currently rebuilding my engine and I havent found an answer in regards to what I need to do to run 9:1 on my motor. Mods are just 87mm 9:1 supertech pistons and a 1.1mm head gasket. Stock turbo and everything else. Do I need to change anything since I'm going to run 9:1 pistons?

04-23-2013, 12:03 PM	#2
ultimateirving Zilvia FREAK! Join Date: Nov 2010 Location: arizona Age: 33 Posts: 1,519 Trader Rating: (1) Feedback Score: 1 reviews	Not technically, just make sure you have a way to tune the motor for the higher compression. __________________ Z32 with lq4 swap Desert Street Scene \|\| Dssevents.com

04-23-2013, 12:08 PM	#3
Mikester Nissanaholic! Join Date: Jun 2007 Location: Kathleen, GA Age: 50 Posts: 1,941 Trader Rating: (0) Feedback Score: 0 reviews	^^ +1. IIRC, there will be more potential for detonation with the higher compression; so like he said above, you will need a tune. __________________

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04-23-2013, 12:12 PM	#4
2muchboost Nissanaholic! Join Date: Apr 2003 Location: Austin, TX Age: 37 Posts: 2,183 Trader Rating: (33) Feedback Score: 33 reviews	+3...engine management and tune will be key!