highest compression with R4 cam (SOHC) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

shinrekka · 10-28-2007, 07:57 AM

Even though i havnt owned a 240 in a long ass time, and its gonna be awile till i pay off my new car I still dream of different builds i'd like to do in the future. For my next build i'd like to go all motor SOHC. I know blah blah blah i dont care what you have to say if you think its a bad idea, no i dont want turbo, been there done that.

Alright heres my question, what is the highest compression i can go using a nismo R4 cam. I'd like to run 10:1 but im not sure what the limit is before the pistons hit the valves.

Heres the potential set up
Nismo R4 cam ( possible port + polished head)
rebuilt bottom end, 10:1 compression pistons (maybe overbore?)
obx header, test pipe, 3" apexi N1 (yeh i know its gonna be stupid loud)
custum intake with K+N filter
Fidanza flywheel, UR crank pulley
JWT ecu

Should be good for 170hp I would think?

10-28-2007, 07:57 AM	#1
shinrekka Zilvia Member Join Date: Oct 2004 Location: Long Island Posts: 251 Trader Rating: (0) Feedback Score: 0 reviews	highest compression with R4 cam (SOHC) Even though i havnt owned a 240 in a long ass time, and its gonna be awile till i pay off my new car I still dream of different builds i'd like to do in the future. For my next build i'd like to go all motor SOHC. I know blah blah blah i dont care what you have to say if you think its a bad idea, no i dont want turbo, been there done that. Alright heres my question, what is the highest compression i can go using a nismo R4 cam. I'd like to run 10:1 but im not sure what the limit is before the pistons hit the valves. Heres the potential set up Nismo R4 cam ( possible port + polished head) rebuilt bottom end, 10:1 compression pistons (maybe overbore?) obx header, test pipe, 3" apexi N1 (yeh i know its gonna be stupid loud) custum intake with K+N filter Fidanza flywheel, UR crank pulley JWT ecu Should be good for 170hp I would think?