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ddillenger
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« on: January 24, 2014, 08:45:48 PM »
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Can I just run a single, small blowthrough MAF and overscale the piss out of it (so that it reads double) to allow me to run blowthrough with my GT2871R's?
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Snow Trooper
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« Reply #1 on: January 24, 2014, 08:58:45 PM »
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Yes or run two tdi mafs and add the resistor to them like the toureg mafs to cut the voltage (signal) in half. Then you wire them in parallel. Did this in 2005 and it was awesome. They read just like an 88mm maf.
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cartoons?
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ddillenger
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« Reply #2 on: January 24, 2014, 09:04:24 PM »
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Thanks Jared! What's happenin'?
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prj
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« Reply #3 on: January 24, 2014, 11:32:39 PM »
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Why not run mafless and add a MAP sensor to the manifold?
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em.Euro.R18
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« Reply #4 on: January 25, 2014, 03:15:47 PM »
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I would go Prj's route seems like less of a hassle and I'd look into something similar to what Gonzo is working on. Its a barometric based fuel correction map not sure how he's doing it.
Not to take away from Snow troopers suggestion which is downright genius not sure I've even heard of that being done and I've been around the tuning scene for a while.
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« Last Edit: January 25, 2014, 03:18:51 PM by em.Euro.R18 »
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Snow Trooper
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« Reply #5 on: January 25, 2014, 04:40:33 PM »
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I would go Prj's route seems like less of a hassle and I'd look into something similar to what Gonzo is working on. Its a barometric based fuel correction map not sure how he's doing it.
Not to take away from Snow troopers suggestion which is downright genius not sure I've even heard of that being done and I've been around the tuning scene for a while.
here is some info from this post (i dont suggest clicking, its audiworld and you get bombarded with pop ups and ads) http://forums.audiworld.com/showthread.php?t=1577716" Get two VW TDI MAFs (part# 0 280 218 063, also cross references to the 2.0 N/A motors) ...
At first I ran them at 60mm (area of 2827.43, basically the same as an 85mm MAF) ... The housings have a step in them for a flow straightener to sit in, the ID of this step is 63.5mm...
... this is very easy to do and if you dont have a lathe the time to pay someone for this should be less than 20 bucks. The reason I opened them up to 63.mm is because the area of two MAFs of this nature is just barely shy of the area of a 90mm MAF (3166.92x2= 6333.84 opposed to 6361.72 for a 90mm). Just perfect for most of us stage3 or 3+ guys. The housing could be opened up a little less for someone with less hardware or with less air flow needs. FYI dual 62 is about equal to an 88mm Maf(3019x2= 6038 opposed to 6082 for a 88mm), and dual 60mm is the same as a 85mm as mentioned before ... Fine tune as neccasary." Looking back at notes, it worked best as a simulated 85mm setup with the grids in place. I cannot find the resistor specs but its easy enough to figure out. |
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cartoons?
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ddillenger
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« Reply #6 on: January 25, 2014, 04:43:32 PM »
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I've heard bad things about running draw through MAF's in blow through configuration.
I guess we'll see.
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Snow Trooper
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« Reply #7 on: January 25, 2014, 04:49:08 PM »
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Yeah, mostly from me and Lee I bet.  Just focus on the numbers. If you go get tdi mafs they are only good for modifying or running draw through. You can epoxy different bases in to make whatever you need for blow through. I have had them work fine up to 35ish psi after that you need metal. You can source a maf of just about any size and any material these days. I would love to see a solid dual blow through setup with what we have learned in the last few years. then, we used them to dial in speed density, throttle cut defender and lemmi tweaked setups. So ashamed, but cars were still dumb fast. |
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« Last Edit: January 25, 2014, 04:51:44 PM by Snow Trooper »
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cartoons?
6A 61 72 65 64 40 76 6C 6D 73 70 65 63
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ddillenger
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« Reply #8 on: January 25, 2014, 04:53:00 PM »
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Well, whatever I do is going to be an undertaking. I intended on a 3.0 build, but given the turbos and lag, I'm leaning now towards a higher rev 2.7 build. Decisions, decisions I guess.
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em.Euro.R18
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« Reply #9 on: January 25, 2014, 04:59:45 PM »
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Tup! snowtrooper good info. I'll have to say I'm not fond of the blow through approach because of the potential for failure. The maf would obviously be dealing with pressure, turbulent air(which should be a hell of a time to tackle although I can't say I have experience on blow through) and if your compressor side seal starts to bleed oil into the housing eventually it will make its way onto that heating element.
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mightemouce
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« Reply #10 on: January 26, 2014, 09:56:09 AM »
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Anxious to see what route you end up going.
I've been thinking of just running a 2in 1 out FMIC with VMP Sensor on my car
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NOTORIOUS VR
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« Reply #11 on: January 30, 2014, 06:55:03 AM »
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Why not run mafless and add a MAP sensor to the manifold?
Did I miss something recently? Is the MAP sensor (if put into the manifold) able to be used as a load input now for fueling calcs for true SD? |
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prj
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« Reply #12 on: January 30, 2014, 03:37:34 PM »
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Did I miss something recently?
Is the MAP sensor (if put into the manifold) able to be used as a load input now for fueling calcs for true SD?
You did not miss anything, because I have not posted anything publicly. |
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nyet
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« Reply #13 on: January 30, 2014, 03:39:11 PM »
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Then it is pointless for anybody to do it
1) its a huge amount of work
2) re-invention of wheel
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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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prj
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« Reply #14 on: January 30, 2014, 03:47:26 PM »
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It's not as much work as you think.
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