Maf sensors

4.2 V8 40v biturbo - 450 bhp
4.2 V8 40v biturbo - 480 bhp (plus)
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Ben_r1
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Re: Maf sensors

Post by Ben_r1 » Tue Aug 14, 2018 3:59 pm

I would imagine a great deal of the design is owed to asthetics as back in 2003 a big carbon fibre slab on top of the engine was still quite premium.

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Re: Maf sensors

Post by PipRS6 » Wed Aug 15, 2018 1:21 pm

MattV8 wrote:
Tue Aug 14, 2018 1:59 pm
It might be terrible - but what would an improvement be? All the aftermarket setups I've seen have been even more terrible pulling in hot air......
That is true of most cars, especially those with a vague hint of performance. Typically airboxes go through a huge amount of R&D to make sure they have the right flow characteristics. And then someone removes it and puts a simple pod filter in there. 9 times out of 10 they will lose power.

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Shoppinit
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Re: Maf sensors

Post by Shoppinit » Wed Aug 15, 2018 2:48 pm

Problem isn't the flow, it's the mounting / fixing system.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Re: Maf sensors

Post by Classik » Wed Aug 15, 2018 3:33 pm

MattV8 wrote:
Tue Aug 14, 2018 1:59 pm
It might be terrible - but what would an improvement be? All the aftermarket setups I've seen have been even more terrible pulling in hot air......
Like this one? http://www.apikol.com/index.php/c5-rs6- ... ystem.html
Seems to me that air is indeed taken from inside the engine compartment (=hot!).
RS6 C5 Avant 2003 Daytona Grey
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Re: Maf sensors

Post by Shoppinit » Wed Aug 15, 2018 5:18 pm

It looks like stirrups for robot gynaecologists.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Re: Maf sensors

Post by Mɐʇʇ » Wed Aug 15, 2018 6:29 pm

Yeah. Give me stock over that any day.

In fact, IMVHO the intake tract isn't the limiting factor on our cars at all. The good upgrades are well documented and this isn't one of them.
"not a professional engineer, mechanic and mechanist"

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Re: Maf sensors

Post by bam_bam » Wed Aug 15, 2018 6:42 pm

I was confused at MattV8 posting in Matt58's until I got to this post...
djbilbao wrote:
Mon Aug 13, 2018 4:03 pm
I dismantle the box air of a friend on the forum the wiring has been moved it is no longer against the partition by fire but along the fuel pipe which leaves room for 2 debimetres I find it very clever I have to replace the candles and debimetres I will take a picture

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Ben_r1
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Re: Maf sensors

Post by Ben_r1 » Thu Aug 16, 2018 9:30 am

MattV8 wrote:
Wed Aug 15, 2018 6:29 pm
Yeah. Give me stock over that any day.

In fact, IMVHO the intake tract isn't the limiting factor on our cars at all. The good upgrades are well documented and this isn't one of them.
Isn’t there a video somewhere of an OE air box collapsing in from the vacuum on a dyno run?

I’d be interested to see the difference back to back dyno run with the air box lid on and off.

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Shoppinit
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Re: Maf sensors

Post by Shoppinit » Thu Aug 16, 2018 9:36 am

I don't think it was collapsing. Maybe flexing a bit, or pulling down. IIRC.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

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Re: Maf sensors

Post by Mɐʇʇ » Thu Aug 16, 2018 9:52 am

What I mean is that the car is power limited in other areas first. It's not like changing the airbox suddenly gives you an extra 50 or 100 hp. But changing to catless downpipes and wagner intercoolers along with a stage 2 map might.....and then, you need to be thinking about torque and life of the gearbox as well....
Ben_r1 wrote:
Thu Aug 16, 2018 9:30 am
MattV8 wrote:
Wed Aug 15, 2018 6:29 pm
Yeah. Give me stock over that any day.

In fact, IMVHO the intake tract isn't the limiting factor on our cars at all. The good upgrades are well documented and this isn't one of them.
Isn’t there a video somewhere of an OE air box collapsing in from the vacuum on a dyno run?

I’d be interested to see the difference back to back dyno run with the air box lid on and off.
"not a professional engineer, mechanic and mechanist"

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Shoppinit
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Re: Maf sensors

Post by Shoppinit » Thu Aug 16, 2018 10:35 am

Yes. The C5 air box isn't a bottle neck until you get to more extreme states of tune.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."

Matt58
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Re: Maf sensors

Post by Matt58 » Sat Aug 25, 2018 3:13 pm

Hello everyone, after cleaning maf sensors and reseating air box and replacing both boost control valves after discovering one on left side(sitting in car) had been butchered and the 5mm silicon pipe was just loosely stuck in with mastic, car runs much better and small whistle on acceleration has gone, what I can't understand is that when engine is fist started from cold (on choke) car ticks over purrrrrfect, but when warm and when looking from rear of car left exhuast every 3-5 seconds sounds like Leota spluttering/missing, any ideas guys and girls? Everything else seams good and normal under load and car in drive ticks over piuuuurfect again, all advice appreciated.

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Re: Maf sensors

Post by bam_bam » Sat Aug 25, 2018 3:41 pm

I'd be interested in how you fist start the car. My love making sessions with Chunky's mum have become a bit dull. I think the 'fist starting a performance car' method should put a bit of pep back into our bedroom.
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Matt58
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Re: Maf sensors

Post by Matt58 » Sat Aug 25, 2018 3:57 pm

Haha, if it helps.

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Re: Maf sensors

Post by Matt58 » Sat Aug 25, 2018 4:00 pm

Is it possible to swap maf sensors over to rule out faulty maf sensor, or re there left and right sensors? Matt

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