Super short SRI... Rethink it!
01-11-2012, 07:00 AM
#122
I was under the impression that MAFS were tuned to ID and length. more specifically, to the tube piece in which they're mounted. this being the primary reason OEM's use a MAF housing at all, otherwise why not install it directly in the intake pipe and tune for each vehicle? that would be cheaper (if they actually tuned each intake). But my impression is that they don't tune each intake, they only tune for the MAFS housing, and the ECU is different for each car.
01-11-2012, 07:05 AM
#123
I was under the impression that MAFS were tuned to ID and length. more specifically, to the tube piece in which they're mounted. this being the primary reason OEM's use a MAF housing at all, otherwise why not install it directly in the intake pipe and tune for each vehicle? that would be cheaper (if they actually tuned each intake). But my impression is that they don't tune each intake, they only tune for the MAFS housing, and the ECU is different for each car.
Hotwire "technology". x.xx V to keep said HW @ certain temp, more airflow = more V, less = less V, in turn, larger diameter = less V, vice versa, less V = lowered IPW, possibly dangerously lean condition as a result if airflow is too 'slow' to cool HW, MAF sends lowered V signal to ECU, resulting in said lean condition.
So, either direct IPW control or, more generic MAF V control is needed to compensate. Or MAF scaling option, such as SAFCII/UTEC/EMU/EMB, etc.
Last edited by NmexMAX; 01-11-2012 at 07:07 AM.
01-11-2012, 08:16 AM
#124
No, they're not tuned for length, only ID.
Hotwire "technology". x.xx V to keep said HW @ certain temp, more airflow = more V, less = less V, in turn, larger diameter = less V, vice versa, less V = lowered IPW, possibly dangerously lean condition as a result if airflow is too 'slow' to cool HW, MAF sends lowered V signal to ECU, resulting in said lean condition.
So, either direct IPW control or, more generic MAF V control is needed to compensate. Or MAF scaling option, such as SAFCII/UTEC/EMU/EMB, etc.
Hotwire "technology". x.xx V to keep said HW @ certain temp, more airflow = more V, less = less V, in turn, larger diameter = less V, vice versa, less V = lowered IPW, possibly dangerously lean condition as a result if airflow is too 'slow' to cool HW, MAF sends lowered V signal to ECU, resulting in said lean condition.
So, either direct IPW control or, more generic MAF V control is needed to compensate. Or MAF scaling option, such as SAFCII/UTEC/EMU/EMB, etc.
Brief/general info: http://en.wikipedia.org/wiki/Anemome...re_anemometers
01-11-2012, 08:35 AM
#125
Junior Member
Join Date: Jul 2008
Location: Manassas, VA
Posts: 21
tapered intake flow
I cant find the post anymore to quote but in this thread, or maybe another, sparks said to another user that they can probably use a 3" midpipe from the TB to the MAF housing then 3.5" OD piping from the MAF housing to the filter and they might see several extra HP. If I tried this on my 2001 max do you guys think it would be would indeed provide extra HP or potentially mess up my MAF?
01-11-2012, 09:11 AM
#126
No, they're not tuned for length, only ID.
Hotwire "technology". x.xx V to keep said HW @ certain temp, more airflow = more V, less = less V, in turn, larger diameter = less V, vice versa, less V = lowered IPW, possibly dangerously lean condition as a result if airflow is too 'slow' to cool HW, MAF sends lowered V signal to ECU, resulting in said lean condition.
So, either direct IPW control or, more generic MAF V control is needed to compensate. Or MAF scaling option, such as SAFCII/UTEC/EMU/EMB, etc.
Hotwire "technology". x.xx V to keep said HW @ certain temp, more airflow = more V, less = less V, in turn, larger diameter = less V, vice versa, less V = lowered IPW, possibly dangerously lean condition as a result if airflow is too 'slow' to cool HW, MAF sends lowered V signal to ECU, resulting in said lean condition.
So, either direct IPW control or, more generic MAF V control is needed to compensate. Or MAF scaling option, such as SAFCII/UTEC/EMU/EMB, etc.
^^ "anemometer" is the word you are looking for, as in "hot-wire anemometer." Not looking to be a know-it-all, just share knowledge with the community.
Brief/general info: http://en.wikipedia.org/wiki/Anemome...re_anemometers
Brief/general info: http://en.wikipedia.org/wiki/Anemome...re_anemometers
I cant find the post anymore to quote but in this thread, or maybe another, sparks said to another user that they can probably use a 3" midpipe from the TB to the MAF housing then 3.5" OD piping from the MAF housing to the filter and they might see several extra HP. If I tried this on my 2001 max do you guys think it would be would indeed provide extra HP or potentially mess up my MAF?
01-11-2012, 08:59 PM
#127
Junior Member
Join Date: Jul 2008
Location: Manassas, VA
Posts: 21
07-12-2012, 06:39 PM
#128
Junior Member
Join Date: May 2009
Location: Seattle, WA
Posts: 45
Sorry to bump an old thread, but DAMN. These types of conversations make me miss owning my Maxima even though I just lurked the forum. So much more ingenuity and creativity on this board. The G forum is dull and less fun to read in comparison haha. Props to the OP and everyone else that contributed useful info to this.
07-13-2012, 10:43 PM
#130
Sorry to bump an old thread, but DAMN. These types of conversations make me miss owning my Maxima even though I just lurked the forum. So much more ingenuity and creativity on this board. The G forum is dull and less fun to read in comparison haha. Props to the OP and everyone else that contributed useful info to this.
07-13-2012, 10:45 PM
#131
So long story short... Check out this link for a good formula and get some pipe for your intake... gain some power!
http://www.ftlracing.com/tech/engine/intake.html
i have a place racing intake i plan to install and want to know where it resonates best vs my shorty
08-18-2012, 10:10 PM
#132
Senior Member
Join Date: Jul 2009
Posts: 424
Or New website address was change: http://www.ftlracing.com/intake.htm
Good Luck with it!
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