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New MAF needed with 20g or not ?

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Old Oct 9, 2007 | 11:08 PM
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Default New MAF needed with 20g or not ?

I've heard that my MAF on my '96 wrx might need changing to handle the 20g i've fitted otherwise it will limit the power I can run.

Can anyone throw any light on this ? I have a green label MAF and i'm hoping for around 380bhp or maybe 400bhp if i'm very lucky
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Old Oct 9, 2007 | 11:44 PM
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the standard maf is not upto that no.. z32 needed
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Old Oct 10, 2007 | 05:17 PM
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Originally Posted by Jolly Green Monster
the standard maf is not upto that no.. z32 needed
Where do I get one of those from ?
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Old Oct 10, 2007 | 05:30 PM
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Originally Posted by 340BHP-WRX
Where do I get one of those from ?
eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

not .co.uk

i'll check down the workshop tomorrow as there might be one there.
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Old Oct 10, 2007 | 05:36 PM
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Simon,
I'm going to be facing a similar problem soon when I put a 2.5 into my 1993 WRX, are there any other sensors that will need changing? I have read that the MAP sensor will need changing, or else a boost controller would need to be fitted, which would be best in your opinion?

Is the Z32 MAF a simple plug in with no modifications?

Will
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Old Oct 10, 2007 | 05:38 PM
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Apexi AVC-R is still the daddy of boost controllers..

the Z32 is reasonably simple fit.. need to rewire the maf though and then the map needs sorting for it.

Simon
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Old Oct 10, 2007 | 05:46 PM
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Ive got a nearly new version 3/4 orange label maf up for grabs if suitable/needed.....looking for £100.00 plus p+p.
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Old Oct 10, 2007 | 06:05 PM
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Originally Posted by rooferman
Ive got a nearly new version 3/4 orange label maf up for grabs if suitable/needed.....looking for £100.00 plus p+p.
if that is an STi or WRX one then that will do the job as well as the z32

Simon
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Old Oct 10, 2007 | 06:07 PM
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i've got a q45 maf for sale as well, andrew c, said it can be rewired to work
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Old Oct 10, 2007 | 06:49 PM
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Originally Posted by rooferman
Ive got a nearly new version 3/4 orange label maf up for grabs if suitable/needed.....looking for £100.00 plus p+p.
I'd be very interested in this mate if it's suitable for me. Do you know if it just plugs straight into a '96 wrx ?
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Old Oct 10, 2007 | 07:19 PM
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Originally Posted by 340BHP-WRX
I'd be very interested in this mate if it's suitable for me. Do you know if it just plugs straight into a '96 wrx ?

I,m not sure as Paul(zen)fitted it to my my99 sti ra as the v5 maf was going to be to weak for future power levels......shortly after i opted for an Autronics ecu any way so no longer needed.....The car is only used a couple of times a month so sensor will be good as new.
I,m sure Paul can vouch for this...
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Old Oct 10, 2007 | 07:22 PM
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Part no.22680 AA271 A36-612 R71 Also has 6 X 3 1 A stamped on it..

90mm housing and a 3 pin plug..

I had just put it on a well known auction site.....
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Old Oct 10, 2007 | 07:24 PM
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Originally Posted by rooferman
I,m not sure as Paul(zen)fitted it to my my99 sti ra as the v5 maf was going to be to weak for future power levels......shortly after i opted for an Autronics ecu any way so no longer needed.....The car is only used a couple of times a month so sensor will be good as new.
I,m sure Paul can vouch for this...
If it will handle around 380bhp-400bhp then I will have it. Is it similar to the z32 maf that has been suggested to me ? I just want whatever will handle the power the car is capable of and I preferably need it for this weekend so I can finish putting it all back together.
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Old Oct 10, 2007 | 07:31 PM
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I,m pretty sure the orange label maf was the daddy of the impreza classic range!!!! And am positive it will handle the power as i was looking for around 400hp at the time..Best to ask your tuner though..
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Old Oct 10, 2007 | 07:33 PM
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the only issue with the q45 is the pipe work diameter is different.. it fits a 99 easier
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Old Oct 10, 2007 | 08:44 PM
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Originally Posted by rooferman
I,m pretty sure the orange label maf was the daddy of the impreza classic range!!!! And am positive it will handle the power as i was looking for around 400hp at the time..Best to ask your tuner though..
If so mate,I will have it but need to make 100% sure first as i'm sure you will understand.

I've just bought a K+N Induction kit,will that fit the orange label maf or will I need to get another filter ?
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Old Oct 10, 2007 | 08:45 PM
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I posted ages ago when I got my Z32 ... got an ebay one from USA with plug / wiring tails, but was dodgy on mapping ( lost signal to 0v ... should not happen! ) so searched and found one direct from Japan or Australia, new, Z32 80mm ( I think ? std scooby is 70 as has a narrowing of the inner neck? Anyway 10mm wider) MAF for about £120 shipped?

Works a treat!
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Old Oct 10, 2007 | 08:47 PM
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Outer diameter possibly the same, inner no narrowing so should fit pipework. I had an adaptor already for cone filter that bolts to the MAF lugs so no need to change that end.
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Old Oct 10, 2007 | 09:43 PM
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Originally Posted by 340BHP-WRX
If so mate,I will have it but need to make 100% sure first as i'm sure you will understand.

I've just bought a K+N Induction kit,will that fit the orange label maf or will I need to get another filter ?

Its got an adaptor bolted to it to suit a K&n filter which i have not used in the Mafless intake i have built...


The adaptor measures 95mm which fits into the K&n filter that i use..
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Old Oct 10, 2007 | 09:59 PM
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I've just measured my K+N and it's 80mm

Will my adaptor just bolt to your MAF to allow me to use the filter ?
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Old Oct 10, 2007 | 10:46 PM
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The bolt hole centres measure 70mm on the vertical side and 95mm horizontal....Bloody hard work this....lol

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Old Oct 10, 2007 | 11:04 PM
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Originally Posted by rooferman
The bolt hole centres measure 70mm on the vertical side and 95mm horizontal....Bloody hard work this....lol



I've just measured my adaptor and the vertical holes measure about 55mm and the horizontal holes measure about 90mm so it won't fit !

I think i'll just try and get the Z32 maf which is 80mm so my filter will fit straight on.

Thanks anyway
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Old Oct 10, 2007 | 11:57 PM
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Originally Posted by 340BHP-WRX


I've just measured my adaptor and the vertical holes measure about 55mm and the horizontal holes measure about 90mm so it won't fit !

I think i'll just try and get the Z32 maf which is 80mm so my filter will fit straight on.

Thanks anyway
No worries .......lol
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Old Oct 11, 2007 | 05:44 PM
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Anyone tried blow through maf setups here?
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Old Oct 12, 2007 | 04:07 PM
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Yes. Newage sensor is the most reliable plus you can get link pipes cheap as chips to locate them in the charge air stream.
Only really suitable for FMIC conversions incase anyone was wondering.
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Old Oct 12, 2007 | 04:16 PM
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I'm just looking at blow through setup (with helpful advice from Andy F and Bob Rawle ) on new age maf...Just starting the ball rolling on prices to modify IC tubes...
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Old Oct 12, 2007 | 09:58 PM
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Andy, does it provide more resolution by changing it to blow through? Have you ever maxed out any newage blow through maf sensor? Currently I'm running 3" maf sensor and it is almost maxed out.
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Old Oct 13, 2007 | 12:38 AM
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No change to resolution, I have maxed one out in a std 65mm tube around 480bhp, an 80mm tube sorted that though, should be good for over 700bhp.

Last edited by Andy.F; Oct 13, 2007 at 12:41 AM.
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Old Oct 13, 2007 | 08:17 AM
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Originally Posted by Andy.F
No change to resolution, I have maxed one out in a std 65mm tube around 480bhp, an 80mm tube sorted that though, should be good for over 700bhp.

I'm running the 80mm MAF in norm position at present, will do same for blow through....Hmmm, 700 bhp...BOB? Must stop dreaming...
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Old Oct 15, 2007 | 05:07 PM
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Hmm interesting thread, and something I hadnt considered when I rebuilt my engine and slung a 20G at it (still running in at the mo!)

I am running a PFC on a built ej20 (1997 JDM WRX) with a 20g. Do i need to be worried about my maf maxing out or can it be rescaled using a data loggit?

Hopefully Andy F will be able to answer this, as I am hoping to book him for its remap in Jan 08
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