those running a blower on a 07-13, did you retain the MAF or just wire in a iat sensor? If so, same wires used at 99-06?

 

I need to know too.

 

I went speed density. But others have kept maf

 

My turbo rides are SD DBC

The ZL1 blower is going on my daily driver 2003 RCSB with a LS3 headed 6.0 and a stock LS9 cam.


I want max mileage and street manners so I figured running the stock truck MAF with the IAT sensor wires plugged into the ZL1 IAT sensor located on the lid.

But it's only 85mm in diameter. I wouldn't want it to be a choke point either.
I

 

NNBS trucks is easy to keep the MAF because it's a card style MAF and not like the 99-06 MAF.

99-06 (07 classic) just ditch the MAF, you will reach the limit of the MAF sensor scale anyway. It's so much easier to tune speed density on those older P01 and P59 computers. Besides you need to run a speed density OS to tune boost correctly too and at the very minumim be able to log boost correctly. Stock VE tables only go up to 100kpa so you couldn't ever tune the VE for 100-200kpa+ aka boost.

 

My older PCM can't support the newer '07+ MAF tables?

It's not like the MAF will see any boost since it will be on the intake/suction side of my ZL1 blower. Not sure that makes any real difference since the amount of air being drawn.

Also, can my older PCM support the tables for the factory ZL1 BAR 3 MAP sensor(s) or do I need to switch to Cobalt SS BAR 2 sensor?

Thanks.

 

So the NNBS computer can read MAF values in the air quantities that my engine, for example, would use? I wish that I could run MAF.

 

A MAF doesn't measure pressure, it measures how much.

 

There is no plug and play information for say like a LS3 style card MAF because the MAF tables themselves are different. You'd just have to make it work somehow, they have different scales. Also the GEN 3 computer have a lower maximum airflow limit for the MAF.

It's not that seeing boost is the problem, the factory 1 bar calibration can't read boost in the Primary VE table, so you could never build a proper VE for boost on a 1 bar tune with a 1 bar map sensor.

If your computer supports a 2 BAR OS or a 3 bar OS depending on the boost level you wish to see, you can would want to upgrade to that and remove the MAF sensor from the tune. All you have to do is use the correct linear and offset settings for the MAP sensor you are using. Past that you must create a new VE table for anything over 100kpa. Pick you last row of say 200kpa and interpolate downwards to 105kpa to build yourself a VE for boost and tune everything in from there.

 

Yes, the NNBS computer have a MAF table that goes all the way to 15,000hz compared to only 12,000hz on say a 2000 5.3 Silverado. They also have a higher maximum g/sec that can be reached and a reason why you can stay with the MAF sensor on a NNBS truck E38 computer.

Also the NNBS or GEN 4 computers for that matter can all change the VVE tables to support 2 or 3 bar without even needing to upgrade the OS of the computer. Plug in the new linear and offset settings for the MAP sensor you are running and extend the MAP values in the VVE editor to support what you are using.