can i run the maf with the magnacharger ?
I was wondering if I should change to speed density and get a different MAP sensor or just stay with the maf. this is on a 2007 lq4 with 4l80e. It is also with a MP122 maggie. The engine is all stock right now but I will be running a smaller pulley. I am guessing I will only get about 10 psi max out of the supercharger. I am also still running the stock MAP.
Last edited by supershift67; December 27th, 2012 at 01:49 PM.
You can run the MAF, but you will have to scale down the IFR/VE/MAF tables to avoid the PCM's 512 g/s MAF limit...
and you will have to shift/scale down any table that references airmass (g) or airflow (g/s).
would it be easier to just do speed density. I was thinking of doing it anyway if I can figure out which MAP sensor to run.Originally Posted by joecar
Yes, it would be easier to go SD...
you should run a COS and a 2-bar MAP.
alright, I will get a MAP sensor and I will try to figure out the COS. I am sure I will have more questions. Thanks for the help
Oh, for 2007 LQ4 there will not be a COS...
you might run the 2-bar MAP, and scale all the tables that reference MAP (or VAC)...
(i.e. 100kPa is really 200kPa, so each table now has twice the range but half the resolution)
edit: corrected typo
Last edited by joecar; December 29th, 2012 at 08:43 AM.
I think you meant 2 Bar MAP Joe...
But yes, you'll need to scale the tune 50%. The last LS1 COSs I believe were for 2005.
~Erik~
2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.
Ah, thanks Erik, yes, I meant 2-bar ( I was typing quickly and not proof reading)
to anyone reading along: it's pretty obvious that the 1-bar MAP would peg at ~100kPa.
o.k. Is there any reading material on how to scale the MAP to 2 bar. I searched some and couldnt find anything. Thanks again guys.
I did find this post on 2 bar. http://forum.efilive.com/showthread....-bar-map-setup Does this seem correct even though I am not running a cos. I am also trying to switch everything over to speed density closed loop. Do I just have to set the maf to not reported?
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