My S2 has got MAF !

[TTM]

Good morning chaps,

Since yesterday morning my S2 has been sporting a MAF set up.

As far as I have observed the MAF kit :
- improves idle stability ; there are no more hesitations or misfiring on idle, which is some "OEM feature" of all S2 engines I had seen before ;
- reduces throttle response to the point the engine revs almost as well and quickly as a 32V 928 (which have a MAF set up from the factory)
- seems to add torque all over the rev range, making for an even more refined, swift and relaxed drive.

The MAF sensor is a Bosch HFM5, currently used on many modern "performance" cars, and addresses cleaning issues reported with older MAF set ups by using a platin film instead of a hot wire.

This kit has been designed and is made by a newly-founded German company named SciVision Automotive Engineering GmbH based near Stuttgart. One of the co founder is a talented German engineer and a dedicated 924/944/968 enthusiast who knows these cars inside and out.
The e-mail adress of the company is info(AT)scivision.ag
I think they speak English too.

Their MAF kit is available for the 85.5 944, 944 S & S2 and 944 turbo.
Versions for the Porsche 911 3.2 and 964 are under way.

May I add that I am not related to that company and I am not making money by making publicity for them.
I just think it is great to have a specific 944 product that has been designed by a proper German engineer using "proper" Bosch parts - this kit reflects pretty well what Porsche could have done on the S2 if they had delayed the launch of 968.
In my humble opinion this is a very elegant "engineering update" for all owners who wish to keep the original air box and keep a discreet look when the hood is raised.

 

[carlmthompson]

Do you mind us asking how much it cost?

 

[TTM]

Sorry, I forgot that. It costs €650 plus shipping.

 

[Fen]

Jeez! Well, I can't think of a reason not to do it at that price. I always thought a MAF would improve my cab immenseley. Nice one.

 

[wolfie308]

Looks a pretty attractive offering, how easy is installation and calibration - any special kit needed ?

Richard

' 90 S.2

 

[TTM]

Installation took me about 20 minutes, including removing the original AFM.
No calibration needed, it's a "plug & play" device.

 

[sawood12]

Has it affected your insurance by much?

 

[chrisr]

That really does sound like a dam good purchase.

My Insurance ( Peart ) clearly state no mods , so I would have to give them a tinkle and see how the land lies.

 

[Guest]

Hi
I am very interested for my S2. How many miles had yours done and had the AFM been reconned at any time?
I just got my AFM reconned and the car flies again. Any power graphs available from the supplier etc. I am planning other mods so this could be worth it as part of the whole project.

Andy
S2 155K

 

[TTM]

Good evening,

My S2 nearly has 110k miles with its original (I think) AFM that had never been reconditioned.

For further technical information you may contact directly SciVision because I honestly don't know more than what I already wrote.

I have little idea about the gains in terms of power and torque so I can only honestly say that the engine reacts quicker to the throttle and it is much happier to be revved, which is the most interesting feature, in my opinion.
This MAF kit wakes the car up in such a natural way it's actually a must have (sorry if that sounds a bit pretentious !)

Edited to add : I forgot to mention it works with any set up that works with the original AFM, meaning cars running non-original chips/ECUs should also run fine with this MAF.

 

[Guest]

Do they have a website or is it e-mail only?
So you basically undo the AFM and directly replace it with the MAF? And no other tweaking?
Anyone shed any more light on the workings/benefits of this. I do have a vague idea, but....
My AFM needed tweaking last MOT at much cost, what happens with these if they need work done?
Maybe we should buy now before someone else gets hold of them and then asks twice the price[]
or wait to see what happens to TTM's car after a good run in[]

 

[Fen]

The benefit is that there is no sprung flap resisting the air flow on the intake. That's is, but it's significant. I think the key is the interface to the ECU - if it's good the product is good, and given Thom says his works well then it sounds like it is good so far and there is no reason I can think of that it shouldn't stay that way. The MAF kits for Turbos have always had difficulties with an interface box or generic chips. Mine was fantastic but it was custom mapped which costs more than the price of this unit in itself. If this reliably (and by that I mean across a range of load and atmospheric conditions) fools the ECU into thinking it has the original AFM then it's a top bit of kit. If I still had my cab I'd probably have one on order already (at least if I also hadn't spent more than all my money on a Turbo that doesn't go yet) and if I had a reservation it would be that it performs as well in very cold and or wet weather as it sounds like it does in the French summer.

 

[Fen]

Oh, it also gets rid of that ugly alloy box with the impossible to clean waffle effect on the lid.

 

[Guest]

Thanks for the extra info Thom I have emailed the guy direct yesterday so I hope to hear back soon, assuming he can read english of course, well doesn't everybody.

 

[TTM]

ORIGINAL: Fen
if I had a reservation it would be that it performs as well in very cold and or wet weather as it sounds like it does in the French summer.

The "French summer" has been quite unstable for the last couple of weeks and I have only tested it in both warm and wet weather so far (~200 trouble-free miles).

Here is an old thread on the development of this kit.
Note it started back in 2003 and the S2 version specifically started taking shape last year (see here). As far as I'm concerned the wait was quite long but in the end it was worth it []
Here are a couple of pictures of the 85.5 944/924 S set up.

 

[Hilux]

MAF??

Whats it stand for?

Is it a replacement or assists air flow metering?

 

[Fen]

Mass Air Flow - replaces the flap typ Air Flow Meter (AFM)

 

[John Sims]

ORIGINAL: TTM

Here is an old thread on the development of this kit.
Note it started back in 2003 and the S2 version specifically started taking shape last year (see here). As far as I'm concerned the wait was quite long but in the end it was worth it []
Here are a couple of pictures of the 85.5 944/924 S set up.

It's all in foreign [&:]

Looks like they have one for the 951 though

Perhaps this will solve my problem? Could someone else try it first though, I'm sick of being treated like a small fury animal with big teeth and a lovable squeak - makes a nice sandwich filling in Peru apparently.

 

[944turboS]

John I'm not keen on the thought of you as a sandwich filling no matter how far you have to travel to fulfill your fantasies. [:'(]

 

[sawood12]

Do these MAF units have any advantages over MAP units which I believe get rid of anything in the arflow at all and measure actual manifold temp and pressure - but are more expensive! I think the Promax kit requires chips and custom mapping.