M2W learning computer question
Thread Starter
Pro
Joined: Jul 2008
Posts: 647
Likes: 5
M2W learning computer question
How does the computer adjust so fast to the exhasut being opened and closed? If drive easy and the valves never open what happens when you get on it and they open up? We all know it takes the comp alitle time to adjust to the more airflow with new catbacks and intakes. Someone explain how this works please. You would think you would not gain any power with them open because the comp would have to learn the new more airflow
Safety Car
Joined: Aug 2007
Posts: 4,836
Likes: 9
From: Rushsylvania Ohio
The computer is not re-learning anything. You are only talking about a 6hp gain with the flaps open and this is due only to a reduction in backpressure. Don't know that anyone has ever really measured the 6hp gain that GM claims anyway.
Thread Starter
Pro
Joined: Jul 2008
Posts: 647
Likes: 5
what Im saying is anytime you add better airflow or take away airfow the computer needs proper time to relearn it properly. If you constintly going from open to closed the comp has no time to learn anything
Safety Car
Joined: Oct 2003
Posts: 3,644
Likes: 13
From: South of Boston MA
As noted above, it's less back pressure when the flaps are open. No extra air is entering through the front unless you've add a cold air intake or swapped out the stock air filter element for a K&N or the like. I don't think the computer has to re-learn anything when the M2W is playing with the flaps. I only use my M2W to show off a little at club meetings or when driving under a highway overpass. 
Drifting
Joined: Jul 2008
Posts: 1,576
Likes: 1
From: Webster Groves (St. Louis) MO
I don't think there is much "re-learning" taking place. If anything, the computer is able to quickly (instantly) measure back-pressure and make whatever adjustments would be necessary. I don't think any adjustments are necessary, though. And if they are, it's "seamless" and in the background.
Keep in mind, too, there is very little change in the amount of back-pressure. The exhaust louver that's opening and closing is right at the end of the exhaust system and really only effects the tone of the exhaust IMO. I believe the 6 hp gain comes from the design of the NPP exhaust, not the louver being open (or closed).
Keep in mind, too, there is very little change in the amount of back-pressure. The exhaust louver that's opening and closing is right at the end of the exhaust system and really only effects the tone of the exhaust IMO. I believe the 6 hp gain comes from the design of the NPP exhaust, not the louver being open (or closed).
Last edited by rjwoerheide; Oct 30, 2008 at 02:00 PM.
Race Director
Joined: Jan 2005
Posts: 13,656
Likes: 7
From: Bay Shore, NY 11706 MILD2WILD (M2W)
St. Jude Donor '06-'07
Most likely better asked in the tech section but the engine is constantly monitoring and adjusting. The O2 sensors do the monitoring. M2W has little to do with the question since the OEM operation have them opening and closing all the time.
Pro
Joined: Nov 2007
Posts: 547
Likes: 3
From: Silicon Valley California
St. Jude Donor '09-'11
The "relearning" you are talking about is the ECU adaptation that occurs after disconnection of the battery.
The slides (Talon90 I think) that have been posted here show the NPP is working off straight non-adjustable tables. It works the same after reconnecting the battery as it does if it hasn't been a power loss in years.
The slides (Talon90 I think) that have been posted here show the NPP is working off straight non-adjustable tables. It works the same after reconnecting the battery as it does if it hasn't been a power loss in years.
Safety Car
Joined: May 2006
Posts: 4,289
Likes: 129
From: Providence Forge, VA
St. Jude Donor '08-'09-'10-'11-'12
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