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LS Air cleaner

chaplinfj60 said:
so slight derail, if you use a stripped down factory harness and reprogram factory computer do they still run MAF?
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Up to your tuner. I always ditch it.

Problem with the MAF and a buggy / swap is that you rarely use the factory intake setup and this will have a big impact on MAF readings.

Instead of spending the time to rescale and re-program the MAF properly, you should just spend more time dialing the SD fuel table and it will do the job no problem and have less sensors to worry about.
 
Back to the OP's question..best filter..R2C Performance Products custom air filter, they will make you one to fit. Mine cost $68 about 5 years ago.
IMG_3348.JPG
 
chaplinfj60 said:
so slight derail, if you use a stripped down factory harness and reprogram factory computer do they still run MAF?
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If you leave the programming factory, yes.

HPTuners has a Speed Density OS for most GM ECM's.

There are factory Speed Density systems. Most I know of are Ford.
 
batch fire? holly fuck there is a term for what gave us grief this weekend trying to start it.

Car in Batch fire mode (Back fires when trying to start)​

 
Batch is a good fail-safe, but you need a special programming to start it nicely.
If you're using sequencial with a quick-start feature and the cam sensor is off, it won't know where it's at an will do unwanted stuff.
 
i agree here. it would pop and fire and back fire, totally felt like the distributor was one tooth off. but that's not the case. but that's the symptoms
 
Bebop said:
You can also turn the codes off and unplug the MAF. As soon as the ECU detects a MAF non-plausible reading, it'll default to SD.
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Doesn't it fail to do other things, like open/closed loop though?

It's been a while since I ran a system like that, but I remember it being shitty on every start up for a while.

Prefer to just program it.
 
Grendel said:
Doesn't it fail to do other things, like open/closed loop though?

It's been a while since I ran a system like that, but I remember it being shitty on every start up for a while.

Prefer to just program it.
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You may be right, I don't use the factory ECU anymore and when I was, I did program it properly in SD.
I'm just adding some tech data for chaplinfj60

Batch fire runs fine most of the time, but it will take at least 1 full crank revolution before it attempts to start since it doens't have cam signal to tell it exactly where it's at. It take a bit longer than the regular quick-start.
 
Bebop said:
You may be right, I don't use the factory ECU anymore and when I was, I did program it properly in SD.
I'm just adding some tech data for chaplinfj60

Batch fire runs fine most of the time, but it will take at least 1 full crank revolution before it attempts to start since it doens't have cam signal to tell it exactly where it's at. It take a bit longer than the regular quick-start.
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Also has shitty fuel economy.

Anyway, enough derailment. He's running SD, and should stick the air filter where ever he wants it.
 
Grendel said:
Also has shitty fuel economy.

Anyway, enough derailment. He's running SD, and should stick the air filter where ever he wants it.
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I asked this over in my LS air intake thread but since there’s some real tech happening here I’ll ask it again. On a system with a MAF what are rules on where the sensor should be placed ..close to the TB..not after a bend..in a section with no less than 6” of straight tube preceding it ?
 
Bullitt1 said:
I asked this over in my LS air intake thread but since there’s some real tech happening here I’ll ask it again. On a system with a MAF what are rules on where the sensor should be placed ..close to the TB..not after a bend..in a section with no less than 6” of straight tube preceding it ?
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Tune it off and remove it
 
Bullitt1 said:
I asked this over in my LS air intake thread but since there’s some real tech happening here I’ll ask it again. On a system with a MAF what are rules on where the sensor should be placed ..close to the TB..not after a bend..in a section with no less than 6” of straight tube preceding it ?
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Damn near every OEM has the MAF on the side of the filter box. So I'd do that.
 
Bullitt1 said:
in a section with no less than 6” of straight tube preceding it ?
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Who made that ‘rule’?

I think it don’t matter much for GM stuff as their MAFs have honeycomb just ahead of sensors.

Even though I’d imagine a good tuner can tweak the tuning via corrections if necessary
 
Bullitt1 said:
I asked this over in my LS air intake thread but since there’s some real tech happening here I’ll ask it again. On a system with a MAF what are rules on where the sensor should be placed ..close to the TB..not after a bend..in a section with no less than 6” of straight tube preceding it ?
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I go for 12" from the TB with the hole in the air flow.

Don't care about anything else.
 
TrailTamer said:
Who made that ‘rule’?

I think it don’t matter much for GM stuff as their MAFs have honeycomb just ahead of sensors.

Even though I’d imagine a good tuner can tweak the tuning via corrections if necessary
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Gen4 LS has the cartridge style.

Have seen plenty of bad readings from non-standard intake tracks.
 
Bebop said:
Gen4 LS has the cartridge style.

Have seen plenty of bad readings from non-standard intake tracks.
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Thats not completely accurate. My gen 4 L92 from an Escalade came with a Gen 3 style. Plastic sleeve.
 
broken4_racing said:
Fair enough. Might want to clarify that though when you make claims. Most everyone encompasses vortecs within "LS".
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Yet you didn't? You called it by it's right designation, L92.

Specifics really do mean something, sometime.
 
Grendel said:
Yet you didn't? You called it by it's right designation, L92.

Specifics really do mean something, sometime.
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Oh agreed. Had i not commented, I guarantee at least someone reads the thread and assumes all Gen 4 LS/Vortecs use the cartridge. That's why I was very specific in stating L92.
 
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