Has everyone removed the MAF Screen yet. I just removed mine and trimmed the crankcase vent so it doesnt protrude into the air path behind the MAF.
2005SSR6Speed said:I did it today and now have it all back together. The Mass Airflow Sensor (MAF) is in between the air filter box and the throttlebody. If you unhook the rubber below hose from the throttle body and the air cleaner box, it will be the hard black center unit with the electrical plug going into it.
Take all the hose clamps off, unplug the electrical connection to the MAF and pull the plastic adapter for the crankcase ventilation out of the bellows hose. Once you have the MAF completely removed from the bellows you will see a honeycomb screen in the MAF, this is what you will remove. Be very carefull and place a screwdriver through the MAF be careful not to bend the wires (there are very thin wires and sensors) and push the screen out. It is a little hard to get started but comes right out easily once started. It is very restrictive.
Maybe we can get Zack or another member to come over to my place this week and take pictures while i do it for them.
It is part of the free mods that have been done to the LS series of engines since they first came out in 1997.
I also trimmed the plastic insert for the crankcase ventilation so that it didnt protrude into the airflow path.
Both are very easy and only take about 30 minutes if you take your time and just frees up the airflow going into the engine.
I will be doing a home porting job on the stock MAF within the next few days. This will just further smooth the airflow into the engine.
I need to look and see if the coolant is routed through the throttle body like the older versions. The coolant bypass mod is also a free or cheap mod.
On the old LS1 engines it was recognized as the first thing you did as soon as getting the car home. I can try to find a full list of free mods on some other sites if you are interested.
Not to worry. Since the MAF sensor is downstream from the air filter, any "debris" will be on the micron level! The screen is there to "stabilize" airflow over the sensors, but popular belief is that on applications with a "straight shot" between the air intake and the MAF, the screen is not needed. GM must think so also, as the 5.3's do not have a screen.ampmop said:I had reservations about removing this screen as it also serves as protection from debris, but I did, we'll see how much improvement is there, I'll have to replace the whole assembly if any debris damages it.