Subject	I'm talking about how the ECU knows how to place the MAF...
Posted by	DVDBURN (MD) on July 02, 2016 at 7:26 PM
	This message has been viewed 392 times.
In Reply To	but interpolation happens after the table lookup posted by zromtech on July 02, 2016 at 12:12 PM
Message	voltage on the VQ table. An interpolation routine is used for that too. Interpolation is used throughout the ECUs functions. What is the definition of interpolation? ...An estimate between two known values. The ECU compares the MAF input voltage against two points in the VQ table and then knows where to put it. As in the example, either 2 or 2.08. There is no inbetween. That point on the VQ table is then directly associated to the point on the CFM table. It's a registry location that then all processes are worked off of to do the rest of the calculations in the ECO code. www.mytwinturbo.com Nissan Data Voice - The first Nissan diagnostic software with a voice! Nissan Data Voice on YouTube Download my Nissan 300ZX Vin/Model Lookup.
Follow Ups	selin dual maf and apexi neo? - scarlet 23:11:06 06/28/16 You could but the Neo can do the same thing the Selin does. - Bernie (NoVA) 23:41:17 06/28/16 Couldn't I get the same results? - scarlet 00:14:26 06/29/16 Yes but it's a waste of money & adds layers of failure point (n/m) - Bernie (NoVA) 07:34:01 06/29/16 Re: Yes but it's a waste of money & adds layers of failure point - scarlet 13:36:27 06/29/16 This is the worst possible way to tune. Modifying the air - MixManMash 14:57:41 06/29/16 Additionally, if it's running "rich," have you checked for - MixManMash 14:58:51 06/29/16 Why would you do that? There is absolutely no sane reason - MixManMash 08:13:35 06/29/16 Ive always been curious about that... - -Grimm- 09:55:09 06/29/16 well.. - Antihero 13:40:25 06/29/16 Exactly. The MAF sensor is non-linear. (n/m) - MixManMash 14:53:57 06/29/16 Re: Exactly. The MAF sensor is non-linear. - scarlet 15:15:15 06/29/16 Ouch! Sounds like you have bigger problems. (n/m) - MixManMash 16:09:32 06/29/16 Re: Exactly. The MAF sensor is non-linear. - scarlet 15:30:45 06/29/16 Anyone ever take one apart? - -Grimm- 19:13:41 06/29/16 if it's still in the box, sell the neo and get nistune. - Antihero 23:50:40 06/28/16 This - BlackholeZ 13:16:11 06/29/16 Agreed, but an off-the-shelf chip is not the same as a - MixManMash 14:58:16 06/29/16 Very true - BlackholeZ 02:54:48 06/30/16 ======Answers... - DVDBURN (MD) 01:40:56 07/01/16 The ECU interpolates MAF VQ table values - zromtech 13:53:19 07/01/16 In my experience it doesn't switch to the next table... - DVDBURN (MD) 15:50:56 07/01/16 To add...the interpolation is used to tell where in the... - DVDBURN (MD) 16:04:35 07/01/16 To try to make this even more simple... - DVDBURN (MD) 11:38:38 07/02/16 Re: To try to make this even more simple... - zromtech 12:19:33 07/02/16 but interpolation happens after the table lookup - zromtech 12:12:21 07/02/16 I'm talking about how the ECU knows how to place the MAF... - DVDBURN (MD) 19:26:25 07/02/16 CFM Table? - zromtech 09:49:05 07/03/16 I'm not saying that. - DVDBURN (MD) 14:21:22 07/03/16 Re: I'm not saying that. - zromtech 18:33:16 07/03/16
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