Grrr...
Just had to replace my scoobies (MY99) MAF sensor due to oil damage from a PiperCross foam filter - so the filter is being ditched!!

The question is...
I've been advised by numerous people NOT to use foam/paper Induction kits which require oiling (thats most.. if not all of them!!),
so what kits are you other guys/gals using and how long have you been using them? any problems??

RichieD

 

look at www.macspower.net
I believe he uses STI parts and will guarantee you MAF.

Andy

 

I found the car just as quick with a panel filter compared with an induction kit. Much quieter, cheaper, and possibly cooler air even if a bit more restrictive. Might improve your low down torque compared with a slight loss at the top end, but on a tiddly turbo the low/mid is where you want it.

Whether MAF failures are oil or vibration related who knows. Blitz SUS is famous for causing trouble. HKS is debatable. K&N seems OK. Just my opinion from reading the posts on here and trying K&N.

To my mind unless you are making a monster (and possibly even if you are) the "power gains" with an induction kit are not worth the noise and risk.

[Edited by john banks - 3/2/2002 12:06:10 PM]

 

Rich,

Did you have the panel filter or induction kit fitted as i've got the px panel,so far ok after 18 months.

Cheers Paul

 

I'm sure Pipercross state to only use the oil when using the filter on a competition car.

Mine has been on for 6/12 and had no problems.(which is bound to be the kiss if death)

Mark A

 

The Pipercross foam filter was the cone induction kit.. and was fitted by the previous owner of the car...
I can definately confirm that my Scoobies MAF was killed by oil being deposited on the heating wire within the sensor.. and was not caused by vibration.
I'm intereseted... nay concerned that Blitz 'sus' kits are "famous" for MAF failure?.. (the guy sorting my Scoobie has said the complete reverse!) - cos i've just bought one!!!!
Surely 'no oil = no MAF failure'??

RichieD

 

http://www.scoobynet.co.uk/bbs/threa...threadid=66945 have a read of that lot and see what you think. Blitz or HKS would not go anywhere near a Scooby of mine, based on those on here that have had failures. I think the filtration pictures of Blitz were a bit shocking too



compared with K&N


Note the power gains on this thread http://www.gtrowner.com/induction.html are from a Skyline.

If you had oil on your sensor, does that mean for certain that the oil CAUSED the failure? I am just wondering if association always implies causality?

I would just hate your MAF to go again with the Blitz. I am not trying to scaremonger on products, but there are many people enthusiastically selling Blitz filters for Scoobies - it doesn't mean they do not have a high MAF failure rate. I would think again personally, but it is entirely up to you.

 

Lots of posts on here in the distant past with Blitz causing MAF failures, particularly the later film rather than hot wire version MAf sensor. I personally replaced mine twice in 6k miles running an HKS foam type. I changed to the K&N/ Sti induction kit from Macs Power and had no problems since. I believe Graham Goode do a similar one, they're not cheap, but cheaper than changing the sensor every 3k miles.. Paul at Macs power will give you a 12 month Maf warranty if you buy one from him and I'm not aware of him having any failures to date.
I would go along with what John has said about the real benefits of induction kits on the scoobs, but it looks good and makes a nice noise if that's your thing.


Al

 

How much is a new MAF if it fails?

 

approx 300

 

I *think* it's about £250-300

Matt.

 

OUCH!!

 

Richie

Can you mail me please neil@scoobyworld.co.uk re: induction order

Thanks

Neil

www.scoobyworld.co.uk

 

Just got my jap import MY99 sorted, new MAF cost me 230 squid fom the top chaps at Triton (Bournemouth).

RichieD

 

So what kit are you running now?

 

It seems apparent that oil contamination and vibration are
the main reasons for MAF failure. But as far as the oil
contamination is concerned; Do everyone now agree that any contamination must be caused by oil from an oil impregnated filter?
- I read (in a previous post here I think - can't remember who wrote it, though) that contamination could maybe also be due to oil in the air being dumped by the recirc DV, and then thrown onto the MAF.... To me this seems to be a fair thought, but I may be way off?? Anyone supporting this theory?

Wouldn't this mean that a VTA dump may be the way to go to protect the MAF from oil contamination when using an oil impregnated filter?

Regards,
Simen.

 

DV recirc after the MAF sensor though.

 

John,

Aware of that, but isn't it correct that the airflow in the intake stops (almost) when releasing the throttle, and the dumped air might then even reverse past the MAF, right? When resonator is removed or a cone filter is fitted, there is even less restriction in the intake on the 'outer' side of the MAF, which further increases the possibility of the dumped air to go the 'wrong way'?

Are you with me on that?
Simen.

 

Slightly off topic but connected......

If you disconnect the tube into the airbox from a Recirc DV, will it act as a quieter VTA, or is it not that simple?

 

I'm with you Simen. I don't know if the flow acutally reverses or not.

I would like to understand DV's more.

 

Hi all,

Might seem obvious BUT?? if you are running without a MAF i.e, boost pressure ,,, are there any serious side affects using say... a BLITZ SUS???

P.S I think the BLITZ has just damaged my MAF ..rough at idle and steady speed..for the last 2 weeks I have been using a K&N panel with sensible oiling !! I could not tell any power difference!!

Julian

 

simen, with regards to what you say you read in a previous post about contamination of the MAF. I think they were Pete Croney's comments, see bottom of the page of this thread about DV.

 

I am reliably informed (by Mervyn at PE) that my MAF has just gone also. Running a K&N 57i, but he thought it was unrelated. From what I know on the 99's they are simply are the weakest link - goodbye!

Also the lambda (sp) has also gone, so its all good fun!!

Matt

 

boultsy,
You are indeed correct !

Still can't make up my mind about VTA/RECIRC/NO DV, but that's another issue.

Simen.

 

There are several different theories, all plausible. Forgot to mention, mine also had an HKS atmos DV fitted from new. No problems with the K&N/ Sti though.

 

*nwesflash*
greek subaru dealers give just the Maf w/out the round plastic pipe for less than 70 quid so your dealer might start doing the same soon

 

DT,
It will, but with the standard DV it may apparently also cause some problems as (from what I've read on this BBS) the diaphragm DV type is prone to leakage when engine is idling. This means unmetered and unfiltered air may enter the engine causing idle problems.

(Just a wild guess, but one might instead use a piston recirc one as you describe, and have a quieter VTA dump. And then, if you don't think it's quiet enough, just connect it back to the intake again Correct me if I'm wrong on this one!!)

Simen.

[Edited by SSE - 3/5/2002 8:26:40 PM]