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Old 01-21-2009, 08:29 PM   #1
Frank A
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Default Anyone interested in using this huge maf to replace the denso sensor?

I was scanning the sema reports for cool new parts and came across this:

http://www.semadigital.com/netpub/se...49&site=np2008

http://www.abacoperformance.com/

What you are looking at is a new 3.5" or 4" MAF sensor that uses multiple flow sensors on both the front and the back of the flow stabilizer veins so that it can zero-out flow reversals and has a digital stage to smooth the flow data.

What I am wondering is whether anyone besides me is interesting in seeing this thing used in a 500+ whp subaru. Unfortunately they want around $450 for one. Any takers?

Frank
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Old 01-21-2009, 11:14 PM   #2
hanzo918
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It sells for $390 online, which is normal for standard aftermarket MAF.

I'm wondering about the advantages over our stock unit...
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Old 01-21-2009, 11:27 PM   #3
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Why bother when blow-thru MAF setups and speed density is proven on subaru's. You have to look at all the other high horsepower subaru's on here. Have any of them used this???? (None that I have seen) So why start using it now when our cars make alot of power without having to use that.

Sounds/looks like more of a PITA than anything. And for people that run bigger diameter intakes than 4 inch which some rotated turbos do it would taper for the MAf thus hurting flow. Plus this has to be wired into the engine harness plus tuned for if any tuner can tune these on our cars.


Stick with what we already know works. bank that $400 they want for that MAF
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Old 01-22-2009, 12:20 AM   #4
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I don't know. If we all felt that way, we wouldn't have electric lights or these horseless carriages.

I'd love to see the op install one and see how it works.
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Old 01-22-2009, 01:30 AM   #5
STIBungy
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There really isnt an advantage. The OEM maf sensor works just fine. You would also have to get a separate air temp sensor if you buy that Abaco one.


Quote:
Originally Posted by hanzo918 View Post
It sells for $390 online, which is normal for standard aftermarket MAF.

I'm wondering about the advantages over our stock unit...
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Old 01-22-2009, 08:07 AM   #6
Frank A
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Quote:
Originally Posted by fastlanerex View Post
Why bother when blow-thru MAF setups and speed density is proven on subaru's. You have to look at all the other high horsepower subaru's on here. Have any of them used this???? (None that I have seen) So why start using it now when our cars make alot of power without having to use that.

Sounds/looks like more of a PITA than anything. And for people that run bigger diameter intakes than 4 inch which some rotated turbos do it would taper for the MAf thus hurting flow. Plus this has to be wired into the engine harness plus tuned for if any tuner can tune these on our cars.


Stick with what we already know works. bank that $400 they want for that MAF
Curious, are the blow-thru maf folks using the denso oem sensor?

Blow-thru maf works if you have enough pipe run before the TB. I'm using a topmount and if I do anything different, it would be a v-mount with a reversed manifold. Speed density requires a map sensor and a different ecu- again not appealing given the aftermarket ecu options that are currently available for an '08 sti. I wasn't looking for anything larger than 4".

This solution does seem to be proven already on Mustangs, BMW's and Porsche's. I'm sure this wouldn't be too much effort to implement.

Frank
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Old 01-22-2009, 10:28 AM   #7
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Quote:
I'm sure this wouldn't be too much effort to implement.
Well, you have to come up with a new location for some sort of IAT (Intake Air Temp) sensor because these MAF's probably don't have one built in like the Suby one. Then you have to figure out the calibration of the MAF and generate a g/s-volt table that you can enter into the ECU so it can accurately measure airflow. Then you have to physically mount it someplace.

I objected to Fastlane's automatic dismissal of the idea BUT, I agree with him that most people don't NEED to use a MAF like this.
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Old 01-22-2009, 12:31 PM   #8
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I would think that seperating the MAF from the IAT sensor would be a good thing, although I am sure it would be a hassle. I am actually surprised that nobody has tried to isolate the IAT sensor and place it in the intake manifold.

I would like to see what Geoff from Full Race has to say. He seems to be a proponent of pre-turbo MAFs, and I know he has mentioned adopting a larger Supra MAF for Subies.
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Old 01-22-2009, 01:47 PM   #9
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I haven't really gotten a good read on it but, apparently the JDM spec-c manifolds have the IAT in the manifold (a bung on the underside). I'm not 100% sure of this information. I've just seen comments about plugging the bung though. IAT in the MAF makes no sense for a turbo car. Even my Civic had the IAT in the intake runner right in front of Cylinder #1.
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Old 01-22-2009, 02:34 PM   #10
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Quote:
Originally Posted by fastlanerex View Post
Why bother when blow-thru MAF setups and speed density is proven on subaru's. You have to look at all the other high horsepower subaru's on here. Have any of them used this???? (None that I have seen) So why start using it now when our cars make alot of power without having to use that.

Sounds/looks like more of a PITA than anything. And for people that run bigger diameter intakes than 4 inch which some rotated turbos do it would taper for the MAf thus hurting flow. Plus this has to be wired into the engine harness plus tuned for if any tuner can tune these on our cars.


Stick with what we already know works. bank that $400 they want for that MAF
The best option if possible would be going full MAP based but to say its not worth trying because none of the big horsepower guys are using it is plain stupid. By that reasoning we would all still be rocking VFxx turbos and running 13 second 1/4 miles.

If you're not trying to constantly improve and move forward you might as well be moving in reverse because everyone else is going to pass you by.

I think its ability to filter out flow reversions would be beneficial to those with big cams that are still MAF based too.
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Old 01-22-2009, 04:04 PM   #11
Frank A
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I think it does include an IAT sensor as well.

I'm hoping an intake builder picks up on it so the g/s to V conversion can be done once as I agree that this is a mild annoyance. They would also be in charge of establishing a direct to OEM wiring adaptor similar to what this company already markets for Fords and others. Plumbing shouldn't be any worse than any 4" intake.

Frank
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Old 01-22-2009, 06:21 PM   #12
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Yeah, you're right. They call it an ACT sensor.

I was looking at this one.

http://fordfuelinjection.com/?p=29

Wondering how much work it would be to plumb this into the intake manifold proper.
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Old 01-22-2009, 06:38 PM   #13
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Quote:
Originally Posted by kellygnsd View Post
The best option if possible would be going full MAP based but to say its not worth trying because none of the big horsepower guys are using it is plain stupid. By that reasoning we would all still be rocking VFxx turbos and running 13 second 1/4 miles.

If you're not trying to constantly improve and move forward you might as well be moving in reverse because everyone else is going to pass you by.
Well said
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