NA vs FI

F360C · 08-06-2014, 12:35 PM

Quote:

Originally Posted by asirvr4

Okay, back to this old thread.

I have made my NA vs FI options much simpler.
Already have fabspeed headers installed.

NA:
-Evolve cf airbox with alpha-N tune.
-cams with performance followers, valve springs and retainters (Shrick 288/280)
-4.10 final diff

FI:
ESS VT2-525 supercharger kit

Let's discuss cost, maintenance, acceleration, response and track driving.

I would make sure Evolve solved their issues with the tune first in regards to the CF box. The latest I have heard it is not fixed and most of the guys that bought their box had to go with different companies software

asirvr4 · 08-07-2014, 08:38 AM

I am also waiting for Evolve to fix thier issue first. If they couldn't then i am expecting they won't do a supercharger kit for our cars, cause they are doing one for the E46 with CF intake plenum. Imagine the sound!

What i mean by my post is getting a supercharger is a higher level in terms of power but still low in FI car category.

Staying NA is more reliable and with these mods takes the Z4M to high levels in NA category.

pokeybritches · 08-07-2014, 05:25 PM

I'd argue that any significant deviation from stock - FI or NA - is going to come with a reliability penalty. A stroker motor with a CF intake, aftermarket cams, and mafless tune will have its own set of issues. Plus, the power will only be available near redline.

Since I've gone with a supercharger that puts out a whole lot of midrange torque, I rarely rev to redline any more... maybe once or twice a week.

Steeler · 08-07-2014, 09:44 PM

Quote:

Originally Posted by pokeybritches

I'd argue that any significant deviation from stock - FI or NA - is going to come with a reliability penalty. A stroker motor with a CF intake, aftermarket cams, and mafless tune will have its own set of issues. Plus, the power will only be available near redline.

Since I've gone with a supercharger that puts out a whole lot of midrange torque, I rarely rev to redline any more... maybe once or twice a week.

Josh I agree although it's tough not to want to wring every pony out and the sound is glorious at 7000 revs

08-07-2014, 08:38 AM	#24
asirvr4 Private First Class 38 Rep 194 Posts Drives: '06 M Coupe VRS Blue Join Date: Sep 2011 Location: Muscat, Oman iTrader: (0)	I am also waiting for Evolve to fix thier issue first. If they couldn't then i am expecting they won't do a supercharger kit for our cars, cause they are doing one for the E46 with CF intake plenum. Imagine the sound! What i mean by my post is getting a supercharger is a higher level in terms of power but still low in FI car category. Staying NA is more reliable and with these mods takes the Z4M to high levels in NA category.
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08-07-2014, 05:25 PM	#25
pokeybritches Colonel 479 Rep 2,782 Posts Drives: ESS/G-Power Z4M, VF Z4, 996tt Join Date: Sep 2009 Location: Los Angeles iTrader: (12) Garage List 2006 BMW Z4M [10.00] 2006 BMW Z4M [8.50] 2003 BMW Z4 3.0i [9.00]	I'd argue that any significant deviation from stock - FI or NA - is going to come with a reliability penalty. A stroker motor with a CF intake, aftermarket cams, and mafless tune will have its own set of issues. Plus, the power will only be available near redline. Since I've gone with a supercharger that puts out a whole lot of midrange torque, I rarely rev to redline any more... maybe once or twice a week. __________________ VF Engineering Z4 3.0i, ESS Z4M, G-Power Z4M, 996 Turbo
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