Custom MAF?
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Custom MAF? Question for the masses here:
After doing a lot of reading about the 100mm MAF's having issues even after running a screen (not all, just some) I had an idea. It's my understanding the issues stem from a lack of velocity over the new card style MAF.
So, here's my thought- Utilizing the material below, I would make my own 3.5" diameter (85mm ID) MAF, vice the 4" MAF (LPE / TSP 100mm) in hopes of not only gaining better unrestricted airflow, but also trying to help velocity for better readings.
I thought about the GM 85mm MAF, but there's still a lot of "stuff" on the inside creating turbulence. Well, that, and it's something I can make and call my own. I will also be adding a SAXON PC MAF Screen to straighten airflow.
I'm thinking it should be easier to tune, and give a better benefit to having a true 85mm MAF.
What do you guys think?
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After doing a lot of reading about the 100mm MAF's having issues even after running a screen (not all, just some) I had an idea. It's my understanding the issues stem from a lack of velocity over the new card style MAF.
So, here's my thought- Utilizing the material below, I would make my own 3.5" diameter (85mm ID) MAF, vice the 4" MAF (LPE / TSP 100mm) in hopes of not only gaining better unrestricted airflow, but also trying to help velocity for better readings.
I thought about the GM 85mm MAF, but there's still a lot of "stuff" on the inside creating turbulence. Well, that, and it's something I can make and call my own. I will also be adding a SAXON PC MAF Screen to straighten airflow.
I'm thinking it should be easier to tune, and give a better benefit to having a true 85mm MAF.
What do you guys think?
Last edited by dr_whigham; May 21, 2012 at 10:08 AM.
Not so much for the OP but to others who like the idea, retuning the AFGS is going to be time consuming understand that first.
I have known others to make their own MAFs it can work well if you put the time in to get it retuned. Believe one tuner made an oval one to match the LT1 TB. If someone can do that your project should be easier especially the tweaking the tuning part.
I have known others to make their own MAFs it can work well if you put the time in to get it retuned. Believe one tuner made an oval one to match the LT1 TB. If someone can do that your project should be easier especially the tweaking the tuning part.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Thanks for info, brother. Yeah, I figured the tuning was going to be time consuming, as well as the clocking to try get the best reading.
Geoff will be tuning the car though, so hopefully I'm covered.
I figured somewhere out there someone had done this, just never ran across a thread. Figured I'd thow it up here for others that might have had the same idea.
Geoff will be tuning the car though, so hopefully I'm covered.
I figured somewhere out there someone had done this, just never ran across a thread. Figured I'd thow it up here for others that might have had the same idea.
TECH Enthusiast
Joined: Nov 2011
Posts: 609
Likes: 6
From: jacksonville,fl
At a car show thanksgiving 2010, I saw spectre advertising an upcoming kit for spacesaving purposes (approx 200 plus) that included the alum mounting plate, Ls7 maf(I assume?) & wiring adapter. Said tuning was necessary. Curious what tuners would have to say about this mod.
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Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Ahh the hell with it.
I'm ordering this stuff and am going to be the guinea pig. Maybe it will work great we have a new alternative to the 100.
This counts as a "poor man's patent" right?
I'm ordering this stuff and am going to be the guinea pig. Maybe it will work great we have a new alternative to the 100.
This counts as a "poor man's patent" right?
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Verdad Gallardo Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Well, just ordered GM Performance 19166574 MAF Sensor Housing. This would also be known as the "bung"
Last edited by dr_whigham; May 20, 2012 at 03:01 PM.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Alrighty. It's done. Ordered my 3.5" aluminum tube, and MAF # 15865791
I'm guessing I need a pigtail now....
Guys, would you suggest using the IAT built into the card LS3/7 MAF, or continue to use my regualar IAT sensor?
I'm guessing I need a pigtail now....
Guys, would you suggest using the IAT built into the card LS3/7 MAF, or continue to use my regualar IAT sensor?
Last edited by dr_whigham; May 20, 2012 at 05:03 PM.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
I guess I'm going to keep the MAF in the neck of the lid for the time being. We'll see how that goes. I'm fairly certain I do NOT want it in the MAF. If I ever do relocate it It's going to be going in the ram air chute.
Parts are all ordered.... should have it together late this week.
Parts are all ordered.... should have it together late this week.
Last edited by dr_whigham; May 21, 2012 at 10:15 AM.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
I remember seeing threads on that Jim, and thanks for posting. #1 reason I never descreened my MAF, but opted for the bigger Saxon screen.
It's the "black magic" GM discovered I'm trying to figure out. The Cobalt has been using these MAF's since 2005, and the new Camaro's & vettes have followed suit. They get good readings somehow, and I'm thinking an 85mm tube, or an 82mm ID should help tremendously with air velocity and accurate readings.
I still plan to screen it though with an 85mm version from Saxon.
It's the "black magic" GM discovered I'm trying to figure out. The Cobalt has been using these MAF's since 2005, and the new Camaro's & vettes have followed suit. They get good readings somehow, and I'm thinking an 85mm tube, or an 82mm ID should help tremendously with air velocity and accurate readings.
I still plan to screen it though with an 85mm version from Saxon.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Well, the 85mm aluminum tube and the card MAF came in today. All I'm waiting for is the bung from Summit.
Initial measurements look promising though. Seems the actual portion of the card that reads the airflow will be perfectly centered. May alleviate the issue of "clocking" the MAF that you have to do with the other 100mm units, since they are off a bit to one side.
Pics to come shortly today.
Initial measurements look promising though. Seems the actual portion of the card that reads the airflow will be perfectly centered. May alleviate the issue of "clocking" the MAF that you have to do with the other 100mm units, since they are off a bit to one side.
Pics to come shortly today.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Yes. It's all together. I just need to get the bung welded when I get home. The portion of the card that actually reads the airflow is perfectly centered in the middle of the tube, so I see this being fairly accurate.
I'll be sure to post pics when I get in (this week) and let you guys know.
I'll be sure to post pics when I get in (this week) and let you guys know.