LLY/LBZ MAF differences

[Redbowties88]

so what are they exactly? ive heard to run a LBZ intake on an lly one would need to rescale some tables....

ive got a hacked up banks on an lly with an lbz mouthpiece now and im really not happy with how it fits. so tomorrow im gonna call banks to see if i can get just that once piece of the lbz kit (doubtful they'll sell it to me) and if that dont work ill just get a whole new intake for an lbz....

anyone got the low down on this? im sure im not the first one

 

[whitetrash21]

Can't answer your question, but I can tell you banks will sell you an LBZ intake tube. I called to order one for a friend who was using the LLY tube and they said they would sell it to me.

Per their email....

The only difference between all of the current Ram Air kits for the Duramax is the Intake tube. The Intake Tube for the LBZ Ram Air intake is part number 42152 and retails for $59.59. You can order that part through our Customer Service department at 888-839-5600 or Tech Support at 888-839-2700.

 

[05' Ditry Duramax]

I have a K&N intake cobbled to make it work with the LBZ MP. It ain't pretty but it works. I had to flip the tube around to make it work but after some cutting and fitting, it's on with no leaks. I wish I would have kept the factory LLY intake but it got lost somewhere. I'd say as long as it doesn't leak and you aren't getting any MAF codes, just run it.

I was getting a P102 code for low MAF flow. I didn't flip the MAF sensor around when I turned the pipe. I turned the sensor around and cleaned it really well. The code went away and the truck runs great now. I wasn't getting all the boost on my tunes. The truck would fall on it's face. When I flipped and cleaned the sensor, it fixed all that.

 

[SHOTZY]

In the beginning lol, I had an AFE stage 2 intake. (LLY) mouth piece. Then I switched to the LBZ mouth piece. Then I bought the LBZ pipe that goes from the mouth piece to the air box. No good. The air box exits at a different angle than the LLY. Had to buy airbox too. As for the MAF tables, they had to be adjusted to allow the truck to fuel properly. This made a big difference.

 

[SHOTZY]

so what are they exactly? ive heard to run a LBZ intake on an lly one would need to rescale some tables....

ive got a hacked up banks on an lly with an lbz mouthpiece now and im really not happy with how it fits. so tomorrow im gonna call banks to see if i can get just that once piece of the lbz kit (doubtful they'll sell it to me) and if that dont work ill just get a whole new intake for an lbz....

anyone got the low down on this? im sure im not the first one

Lol, I guess I can't answer it either.

 

[Cougar281]

The MAF is the same on the LBZ & LLY's. The difference is the intake tube. The different size (the size at the MAF makes the primary differece) will cause the incoming air to have a different velocity, thus the MAF sensor will read it differently.

 

[Redbowties88]

Thanks guys. Sooooo if I go into a stock lbz tune and copy and paste the maf voltage stuff would I be in business?

Wes, that's awesome thanks I'm ordering today. It's impossible to get the lly one to work amd seal right. I've been putting this off far to long as is

 

[Cougar281]

Thanks guys. Sooooo if I go into a stock lbz tune and copy and paste the maf voltage stuff would I be in business?

Wes, that's awesome thanks I'm ordering today. It's impossible to get the lly one to work amd seal right. I've been putting this off far to long as is

Here's the MAF flow rate table for a 04/05 LLY w/LBZ airbox. It might and might not work right. IIRC, TNRGreene was having wierd issues that my have been related to just pasting in that table. It's possible that there are changs to the tune that EFILive can't see. If you want, PM me your VIN and I can get you the proper stock tune for your truck.

0.000000
0.000000
2.314848
3.132278
3.860835
4.583192
5.365486
6.258356
7.302104
8.525666
9.947644
11.579405
13.426116
15.488811
17.765422
20.251816
22.945927
25.846720
28.956263
32.281790
35.839834
39.651066
43.749586
48.178799
52.998642
58.279388
64.111977
66.138500
66.138500
66.138500
66.138500
66.138500
66.138500

 

[stacks04]

these are what changed. from 4.22-5.0 on the maf flow rate table. i got this from someone here when i did it last year.

66.14
66.14
66.14
66.14
66.14
66.14

 

[duratothemax]

I think the 66.14 cells in that table actually go higher than what efilive will display. I find it hard to believe gm would just flatline the table like that. And when you open it up in efilive they are "blue", as if they are out of range.

 

[Redbowties88]

thanks alot guys :hug:, cougar you have a PM coming with vin.

hopefully mine runs right.

 

[TrentNell]

If your throwing MAF out of range codes it is a 2 part problem and you have to, 1. the sensor voltage scaling needs to be rescaled , if you can get close enough it should cure the MAF out of range code , or voltage low / high ect , 2. if you cant get the voltage scaling close enough you may need to adjust the "expected Airflow table " so the ecm thinks the amount of airflow its getting is the right amount .

 

[Redbowties88]

If your throwing MAF out of range codes it is a 2 part problem and you have to, 1. the sensor voltage scaling needs to be rescaled , if you can get close enough it should cure the MAF out of range code , or voltage low / high ect , 2. if you cant get the voltage scaling close enough you may need to adjust the "expected Airflow table " so the ecm thinks the amount of airflow its getting is the right amount .

no codes yet trent, preempting any problem before switching intake pieces. or trying to anyways

 

[McRat]

I've run LLY MAF with LBZ engine controls with no issues.

Keep in mind cross-section size calibrates MAF signals just like a new P/N would. Want a MAF to read more flow? Reduce cross section. More? Increase CS.

 

[Redbowties88]

well as i understand it the maf itself is the same piece. its the intake that is different and causes it to read incorrectly.

 

[Redbowties88]

well after about 10 phone calls i finally got through to someone at banks. they had no idea what the hell i was talking about (so much for knowledgeable tech support) but finally got it ordered up and on its way.

WES, thanks a million. without that PN# i would still be running in circles with those retards

 

[Cougar281]

I think the 66.14 cells in that table actually go higher than what efilive will display. I find it hard to believe gm would just flatline the table like that. And when you open it up in efilive they are "blue", as if they are out of range.

I'm going to flash the "latest 'n greatest" verision of his tune to my second ECM with my Tech2 and send it to him. Hopefully EFILive's limits won't dork it up too bad. Although if you look at a LBZ tune, GM flatlines the last four at 77.161367, although EFILive has a max of 120. My guess is that the table should look similar the the LBZ table, topping out around 77, but EFILives limit caps it at 66.

 

[05' Ditry Duramax]

So, basically from what i'm reading it would be a good idea to match the LBZ flow rates to the tunes in my DSP 5 switch? Or just scale the rates to a stock LBZ tune? I'm kinda confused.

OR, I don't have any codes and the trucks "seems" to run fine I can just leave it alone?

 

[Cougar281]

So, basically from what i'm reading it would be a good idea to match the LBZ flow rates to the tunes in my DSP 5 switch? Or just scale the rates to a stock LBZ tune? I'm kinda confused.

OR, I don't have any codes and the trucks "seems" to run fine I can just leave it alone?

Well, the LBZ & LLY tables aren't identical, just similar, so no, you couldn't just copy them. If your LLY has the "flat" airbox, no change needed. If you have the 06+ airbox, but haven't changed the tables, you probably should. Even if you're not setting codes, it might not be running to potential...

 

[LarryJewell]

Baby steps on the rescaling , just a little can make a big difference, for better or worse