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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.
MAF Screen removal
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Submissions now being accepted for MAY SSR OF THE MONTH
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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.
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.
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I will look around for other free mods too I remember these 4 but will have to find the others. There were a few that did the dyno before and after the free mods and they claimed it made between a 10-15 HP difference in the LS1 back when it was first introduced to the F-Bodies.
Zack - Give me a call this week. We will perform the free mods to your SSR while you take the pictures then we can post them here for everyone.
(1) MAF Screen Removal
(2) Home Ported MAF
(3) Crankcase Ventilation Tube
(4) Throttle Body Coolant Bypass
Zack - Give me a call this week. We will perform the free mods to your SSR while you take the pictures then we can post them here for everyone.
(1) MAF Screen Removal
(2) Home Ported MAF
(3) Crankcase Ventilation Tube
(4) Throttle Body Coolant Bypass
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3,957 Posts
Anyone live close to Vista, California with an 03-04 that can bring it by to see if you have the MAF screens?
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Here is a good write-up in GM High Tech Performance
http://www.gmhightechperformance.com/tech/0311htp_projls1/index.html
http://www.gmhightechperformance.com/tech/0311htp_projls1/index.html
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I drove it all over today. I think it is more responsive after doing the MAF screen and vent tube. I am going to get a better filter for it tomorrow and I might modify the air cleaner housing.
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It would seem by the 2 that have 03-04's that the MAF Screens might not be there in the 5.3 SSR's. I would like to find someone close to come over and check it out. It is real easy to do. I will do it for free to anyone that comes over with thier SSR.
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Here are the pictures of me doing the MAF Screen and Crankcase Vent.
MAF Screen in the intake tube off of air box:
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MAF removed from the SSR:
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Screen removed from the MAF:
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MAF with screen removed:
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Crankcase vent protruding into intake path:
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Crankcase Vent Tube after trimming to 2nd lip:
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Crankcase Tube reinstalled in the intake path:
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Maybe we can get Zack to comment on this, he left my house in a blaze of tire smoke and rubber to test it out.
MAF Screen in the intake tube off of air box:
MAF removed from the SSR:
Screen removed from the MAF:
MAF with screen removed:
Crankcase vent protruding into intake path:
Crankcase Vent Tube after trimming to 2nd lip:
Crankcase Tube reinstalled in the intake path:
Maybe we can get Zack to comment on this, he left my house in a blaze of tire smoke and rubber to test it out.
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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:
Blast
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I might ride up to Corona tomorrow, hope to see everyone there.
More responsive
Yep----hauls ass. Like Smokin Joe said it's mostly in the upper RPMS. I got a nice 2nd gear schratch leaving his place and when I'm cruzin at about 3,000 rpms and I hit the gas it feels more responsive like the power is right there on hand.
I can't wait to do more.
Zack
Yep----hauls ass. Like Smokin Joe said it's mostly in the upper RPMS. I got a nice 2nd gear schratch leaving his place and when I'm cruzin at about 3,000 rpms and I hit the gas it feels more responsive like the power is right there on hand.
I can't wait to do more.
Zack
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