boosting a 4-port na

sikest1 · 10-08-2009, 06:13 PM

My engine was not built for turbo, but I was wondering how much boost I could safely put on it? I'm just unhappy with the power lag from 3k to 7k rpms

BigIslandSevens · 10-08-2009, 06:54 PM

5-7 psi is what I have seen run on N/A S4&5 engines.That is a "safe" #. I have seen others run 10+ also and not have issues. But They also had alot of fuel and ECU mods.

12arotary · 10-08-2009, 10:52 PM

5 if its a 12a

moremazda · 10-09-2009, 08:42 AM

One can not answer the "how much boost" question until one knows which turbo you are wanting to use. Which turbo you use depends on how much power you want.

RotaryProphet · 10-09-2009, 10:18 AM

I've run 16 PSI on a totally stock internal 12a motor during tuning, and ran 13.5 PSI on the same motor as a daily for months after that. It comes down to proper fuel and spark tuning, really.

PercentSevenC · 10-09-2009, 12:45 PM

Ran 9 PSI daily with a Camden supercharger with my old-school 13B. No problems.

sikest1 · 10-09-2009, 07:13 PM

Quote:

Originally Posted by RotaryProphet

I've run 16 PSI on a totally stock internal 12a motor during tuning, and ran 13.5 PSI on the same motor as a daily for months after that. It comes down to proper fuel and spark tuning, really.

the engine is a 4-port 13b. I have a T II setup available to me but I want to stay carb'd. Will the stock ignition cause a problem? I am a mechanic but don't know anything about turbo except it makes the car faster.

10-08-2009, 06:13 PM	#1
sikest1 pwrdbyrotorcuzpistnsrweak Join Date: Sep 2009 Location: Cambridge, On Posts: 36 Rep Power: 0	boosting a 4-port na My engine was not built for turbo, but I was wondering how much boost I could safely put on it? I'm just unhappy with the power lag from 3k to 7k rpms

10-08-2009, 10:52 PM	#3
12arotary tumor-syphilis-itis-osis Join Date: Sep 2008 Posts: 191 Rep Power: 17	5 if its a 12a __________________ 82 300d 82 Gsl 84 b2200 Diesel 88 gxl

10-08-2009, 06:54 PM	#2
BigIslandSevens Rotary Fanatic Join Date: Feb 2008 Location: Denver, NC Posts: 201 Rep Power: 18	5-7 psi is what I have seen run on N/A S4&5 engines.That is a "safe" #. I have seen others run 10+ also and not have issues. But They also had alot of fuel and ECU mods.

10-09-2009, 08:42 AM	#4
moremazda shookmotorsports.com Join Date: Apr 2008 Location: Rockford, IL Posts: 108 Rep Power: 18	One can not answer the "how much boost" question until one knows which turbo you are wanting to use. Which turbo you use depends on how much power you want.

10-09-2009, 10:18 AM	#5
RotaryProphet Rotary Fanatic Join Date: Sep 2008 Posts: 147 Rep Power: 17	I've run 16 PSI on a totally stock internal 12a motor during tuning, and ran 13.5 PSI on the same motor as a daily for months after that. It comes down to proper fuel and spark tuning, really.