How many LBS of boost on 91 octane - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

HIGHMILEHATCH · 12-17-2005, 10:46 AM

It's called detonation.

I would stop listening to the people telling you "20 lbs with RAS ans stiffer valve springs". That doesn't make any sense. Stiffer valve springs are necessary when upgrading cams. RAS prevent the rocker arms from flying off at high rpm. Neither which have any affect on how much boost you can run on a given octane. You mention you have 550cc injectors. What is controlling them? Please don't tell me stock ECU.

12-17-2005, 10:46 AM	#4
HIGHMILEHATCH Zilvia Member Join Date: Jun 2003 Location: PA Age: 44 Posts: 182 Trader Rating: (3) Feedback Score: 3 reviews	It's called detonation. I would stop listening to the people telling you "20 lbs with RAS ans stiffer valve springs". That doesn't make any sense. Stiffer valve springs are necessary when upgrading cams. RAS prevent the rocker arms from flying off at high rpm. Neither which have any affect on how much boost you can run on a given octane. You mention you have 550cc injectors. What is controlling them? Please don't tell me stock ECU. __________________ www.street-solutions.com www.evans-tuning.com