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make your own 4" maf

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Old 08-16-2011 | 08:18 PM
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make your own 4" maf

instead of buying a tsp, lingenfelter, etc. maf and housing I went the cheaper way.... spectre 4' maf housing 9705 (34.95), ebay ls7 maf (49.95), and an ebay pigtail (21.95)....ends you with this
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Old 08-16-2011 | 08:36 PM
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re: make your own 4" maf

I just had mine tuned out.

Nice DIY though
Old 08-16-2011 | 08:43 PM
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re: make your own 4" maf

i had mine tuned out also... major pita for myself! cant even change the airfilter without it affecting the tune..
Old 08-16-2011 | 10:02 PM
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re: make your own 4" maf

Wow this may be something I need to do this winter. My whole cai is 4" except for where it has to step down to the 3 1/2" or 3 1/4", whatever it is, stock truck maf.

My tuner had mine tuned out the first go around also, but the start up issues were annoying, couldn't get it to be reliable on a cold start.
Old 08-16-2011 | 10:45 PM
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re: make your own 4" maf

damn more stuff to buy haha
Old 08-16-2011 | 10:45 PM
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re: make your own 4" maf

wait will the ls7 maf work on the gen3 ecm? 0411
Old 08-17-2011 | 12:04 AM
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re: make your own 4" maf

Originally Posted by 89ROC-Z
wait will the ls7 maf work on the gen3 ecm? 0411
Yes it will.. Just needs to be tuned for it and have the correct maf table.
Old 08-17-2011 | 01:33 AM
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re: make your own 4" maf

Added a link to this thread in the LS1 swap sticky.
Old 08-17-2011 | 06:40 AM
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re: make your own 4" maf

very cool, and noting for my own setup in case of future upgrades
Old 08-17-2011 | 07:44 AM
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re: make your own 4" maf

I see no reason paying 200+ dollars when you could put together the same thing for 100...
Old 08-17-2011 | 10:55 AM
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re: make your own 4" maf

One question? Wouldn't a 4' (foot) MAF go half way into the cabin of the car?

On a serious note, that looks like a great alternative.
Old 08-17-2011 | 12:11 PM
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re: make your own 4" maf

Originally Posted by Drkhrse89
One question? Wouldn't a 4' (foot) MAF go half way into the cabin of the car?

On a serious note, that looks like a great alternative.
It hides well! Ha ha. Ill take pics of the inside also
Old 08-17-2011 | 02:04 PM
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re: make your own 4" maf

Is there a way to use that Spectre housing and a stock truck maf?
Old 08-17-2011 | 02:20 PM
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Re: make your own 4" maf

Originally Posted by BlueZee28
Is there a way to use that Spectre housing and a stock truck maf?
doubtful without a lot of chopping. the ls7 is a "card" type maf and does not have the tube integrated with the sensor like the 85mm truck one does
Old 08-17-2011 | 03:20 PM
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Re: make your own 4" maf

Originally Posted by 1ADan
doubtful without a lot of chopping. the ls7 is a "card" type maf and does not have the tube integrated with the sensor like the 85mm truck one does
The ls7 sensor does have an internal iat sensor.. But id relocate say a stock ls1 sensor into the start of your cai to avoid the aluminum heat soaking the sensor and giving a false iat reading
Old 08-20-2011 | 11:29 AM
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Re: make your own 4" maf

Does the ls7 maf have the same plug/wire configuration as the 5 wire truck mafs?
Old 08-20-2011 | 11:53 AM
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Re: make your own 4" maf

Originally Posted by 89ROC-Z
Does the ls7 maf have the same plug/wire configuration as the 5 wire truck mafs?
No
Old 08-20-2011 | 01:27 PM
  #18  
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Re: make your own 4" maf

Different connector, same number of wires/function and pinout
Old 08-21-2011 | 09:55 PM
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Re: make your own 4" maf

Nice work. I'll be copying that on my Lq4 s10 build.
Thanks,
Kory
Old 08-25-2011 | 09:46 PM
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Re: make your own 4" maf

Nice Mod! Note taken.
Old 08-25-2011 | 09:49 PM
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Re: make your own 4" maf

thats a cool mod, i myself am figuring out my air intake dilemma right now, im trying to run a RAII hood with matching box made for it and i cant seem to find something that works right. i saw the blueish vert bird that guy made using a whisper lid, fiberglass etc etc but i havent worked with fiberrglass yet. im starting to look through my yard for other types of OEM airboxes, gm, euro and japanese to find something. frustrating.
Old 08-29-2011 | 01:26 PM
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Re: make your own 4" maf

I myself didnt like the polished look so I painted mine black.
Old 08-30-2011 | 04:45 PM
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From: Readsboro, VT
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Re: make your own 4" maf

For anybody that does this, just be advised that without a tune from a shop that's got the talent to build a custom MAF table, chances are your performance will suffer drastically. It's not likely that a shop will just be able to copy an LS7 table due to the different air path in this configuration, but at least that might get you into the ball park. Either way, running this setup with your existing tune is not likely to provide the best results.
Old 08-30-2011 | 05:11 PM
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Re: make your own 4" maf

Originally Posted by Jim85IROC
For anybody that does this, just be advised that without a tune from a shop that's got the talent to build a custom MAF table, chances are your performance will suffer drastically. It's not likely that a shop will just be able to copy an LS7 table due to the different air path in this configuration, but at least that might get you into the ball park. Either way, running this setup with your existing tune is not likely to provide the best results.
Powermaf has the change over voltages. And I believe it would provide ALOT less airflow resistance. A good tuner can do the changes easy.
Old 08-30-2011 | 09:12 PM
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Re: make your own 4" maf

Originally Posted by 1nasty86
A good tuner can do the changes easy.
Agreed. I just don't want somebody to do the mod then find out he needs a $500 tune to make it function properly.
Old 10-24-2011 | 08:50 PM
  #26  
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Re: make your own 4" maf

Just thought Id add in some GM part numbers. I ordered mine through GM Parts direct and Ive added the PN's and the ( as of today ) price below. I went for this instead as I dont want so many couplers in my system I am only after the bung and will weld it into the pipe itself so I'll only have the silicone elbow from the TB around to the piping then filter. Nice and neat

Bung: PN 19166574 and it runs $9.27
LS7 MAF PN: 15865791 and its $55.52


Old 10-25-2011 | 08:09 AM
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From: Pepperell, MA
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Re: make your own 4" maf

Originally Posted by cam-
Just thought Id add in some GM part numbers. I ordered mine through GM Parts direct and Ive added the PN's and the ( as of today ) price below. I went for this instead as I dont want so many couplers in my system I am only after the bung and will weld it into the pipe itself so I'll only have the silicone elbow from the TB around to the piping then filter. Nice and neat

Bung: PN 19166574 and it runs $9.27
LS7 MAF PN: 15865791 and its $55.52



not a bad price, considering I paid around $60 for a used truck MAF (85mm) and the stock LS1 fbody ones seem to go for over $100 on ebay
Old 10-25-2011 | 08:47 AM
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Re: make your own 4" maf

Originally Posted by 1ADan
not a bad price, considering I paid around $60 for a used truck MAF (85mm) and the stock LS1 fbody ones seem to go for over $100 on ebay
Damnit Dan i got'em for $40! lol
Old 10-25-2011 | 09:11 AM
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Re: make your own 4" maf

Originally Posted by 88FormulaKiller
Damnit Dan i got'em for $40! lol
hey, i was young and dumb, i know better now (ok, so maybe it was like a year ago)

Old 07-14-2017 | 07:36 PM
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Re: make your own 4" maf

Originally Posted by 1nasty86
instead of buying a tsp, lingenfelter, etc. maf and housing I went the cheaper way.... spectre 4' maf housing 9705 (34.95), ebay ls7 maf (49.95), and an ebay pigtail (21.95)....ends you with this
hey man I have a question about your maf sensor. Your saying this will work on a 86 camaro and which pigtail did you buy. I just built a 350 too motor for my car and have a custom tune and I feel like my stock maf sensor is holding my motor back and wanna upgrade it
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