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Blazius
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« on: April 27, 2021, 09:09:38 PM »
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I've been wondering about this and searches show very little info regarding the 1.8T's and rs4 maf compressor intake design. Given the nonstandart RS4 OD is 86mm which is ~3.38 inch how would you adapt/design the intake tract taking into all measures - MAF distance from turbo and filter, solid piping on small distance at the very least for DV barb etc if not buying prebought if they even exist..
Lets take the G25 550/660 for example, they feature a 3 inch compressor inlet , fairly standart. Ofcourse you would need a 76mm to 86mm silicon adapter, and quick google search only shows one company in the USA, rest ebay / china. Then 86-86mm coupling for solid piping for reasons mentioned above, then filters, they come in 3,3.5,4" etc, so you would need a reducer to a certain size again, 3.15" couplers might or might not stretch to 86. Piping OD should be available in 86mm+ so no issue there.
How would you do design it?
If anyone is running a setup like this please tell, pictures welcome too.
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Blazius
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« Reply #1 on: April 30, 2021, 01:25:11 PM »
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Surerly somebody ran an rs4 maf on a 3 inch compressor housing on 1.8 . 90mm(3.54inch) to 76mm couplings are more widely available so I guess "enlarging" the housing is one way to do it too.
Would like to see some setups tho..
Also due to space reasons one might consider cobra head too but again the "weird" size needs to get adapted to it somehow, cant do straight shot, from 3 inch or 3.5.
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aef
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« Reply #2 on: May 03, 2021, 12:15:56 AM »
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0280218067 OD is 90+  |
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Blazius
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« Reply #3 on: May 03, 2021, 05:31:56 AM »
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0280218067 OD is 90+ Are you sure? Every resource I found lists the maf as 83mm ID, 86mm OD. Here is a picture from GT-innovation even:  If its 90mm then that's a relief, 90mm-90mm , 90mm-76mm are easily found. Dont know where they get 86mm then. |
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Blazius
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« Reply #4 on: June 29, 2021, 05:44:24 AM »
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To confirm just got an RS4 MAF housing, the OD on filter side is 91mm and motor side is 90mm which is 3.5 inch.
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_nameless
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« Reply #5 on: July 10, 2021, 06:36:40 AM »
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In my personal experience a 4 cylinder in the lower rpm range doesnt have resolution from the housing being so large. makes idle tuning and part throttle shittly. Im sure with more effort I could have made it work but i just went sd
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Giving your mom a tuneup
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fknbrkn
Hero Member
Karma: +186/-24
 Offline
Posts: 1462
mk4 1.8T AUM
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« Reply #6 on: July 10, 2021, 08:59:15 AM »
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sd
Nyeeee  |
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prj
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« Reply #7 on: July 10, 2021, 11:22:19 AM »
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Proper SD works great.
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Blazius
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« Reply #8 on: July 10, 2021, 12:11:54 PM »
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Which is what I might have to do since then I found out that with the new setup it might be physically impossible fit a maf intake , so either SD or blowthrough. What put me off with SD before is that the car is still a daily driver even tho got backup car , so I was trying to avoid massive asm experiments.
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nyet
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« Reply #9 on: July 10, 2021, 01:02:45 PM »
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I have no problem with properly implemented SD
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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_nameless
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« Reply #10 on: July 10, 2021, 07:42:01 PM »
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Which is what I might have to do since then I found out that with the new setup it might be physically impossible fit a maf intake , so either SD or blowthrough. What put me off with SD before is that the car is still a daily driver even tho got backup car , so I was trying to avoid massive asm experiments.
I shared a fulling working solution with you, you're a smart fella im sure you can make it work  |
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Giving your mom a tuneup
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golfputtputt
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« Reply #11 on: July 11, 2021, 02:30:04 PM »
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I have no problem with properly implemented SD
How? |
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Blazius
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« Reply #12 on: July 11, 2021, 03:08:07 PM »
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How?
What how? There is a thread in the Reverse engineering section. Study it. |
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golfputtputt
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« Reply #13 on: July 11, 2021, 04:32:09 PM »
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What how? There is a thread in the Reverse engineering section. Study it.
Ah i did not see that but now i do. Thanks ya. |
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nyet
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« Reply #14 on: July 11, 2021, 04:51:47 PM »
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What how? There is a thread in the Reverse engineering section. Study it.
There is no way that is sufficient. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease do not ask me for tunes. I'm here to help people make their own. Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
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