Vitesse MAF

[Diver944]

I have one too Jim. Very easy to fit - took me less than 2 hours in total and that included replacing the chips in the ECU's. Gave me a very solid idle, immediately reduced turbo lag and also had to turn down boost a little due to the extra 'breathing' it allowed. The beauty is it adjusts fuelling to match whatever boost you are running and when I logged it with my Wideb and the fuelling was virtually spot on. You can't do that with just a chip Due to my setup eventually needed the Piggyback to get the best out of it and that did need professional help as it needed a lot of wiring spliced into the connector at the ECU. One more thing - be careful how you route the wires to the MAF. I was careless with mine and the first time I used the car at night, the popup mechanism ripped all the wires out of the MAF and left me stranded []

 

[Frenchy]

Cheers Paul, Where did you source yours JMG ? Do i have to change chips i have Promax in the 250 and Lyndsey Racing in the 220, would be looking to fit one in the 250 initially.

 

[Diver944]

I bought it direct from John at Vitesse in the States a few years ago when the exchange rate was much more preferable. Yes, it comes with Vitesse chips which are obviously matched to the MAF anf you get fantastic support from John in getting it all going (which is easy anyway)

 

[Suffolk944]

Its a fine bit of kit, not only does it give you a bit more power but it also makes the engine feel much more responsive and "modern" in its characteristics. Sourced it via Promax having contacted John at Vitesse directly first. John offers an excellent pre and post purchase service, always willing to answer any questions you may have and offer advice. Have just upgraded to a new turbo and more boost and by all accounts the MAF has adapted very well just as John said it would. Picking the car up up tomorrow so will let you know ! Price was $1250 as per the site. http://www.vitesseracing.com/html/mass_air_flow.html

 

[Frenchy]

Notice you have one fitted Suffolk, Sulzeruk has been singing thier praises when i spoke to him on the phone this week, where did you source yours, how much, what sort of job to fit and finally your impressions ?
Cheers Jim.

 

[edh]

I ran one for a year and a half. Well put together, worked out of the box, but I felt the improvement was relatively subtle. Boost arrives a little earlier, probably a bit more power. The main benefit is the tuning flexibility, particularly the options to change turbos etc.. For me it's for the 944 owner who is planning big power or other serious mods. John's support was great, but there are limits - he's a one man operation and is thousands of miles away. I had a MAF failure which took quite a while to diagnose & replace (under warranty). JMG sell these, probably no more expensive to buy once you account for taxes. Don't forget you also need 55lb injectors as a minimum - John doesn't support his maf with standard injectors. The $70 harness adaptor is also worth having as it saves you from having to hack your AFM wiring. If I had the same car again I would stick with a chip, MBC and DPW ( and put the saving towards KW's if I needed new suspension [] )

 

[TTM]

I think the Vitesse ECU add-on is a good set up for turbo owners who wish to upgrade their engine progressively (different turbo, camshaft, etc) but who haven't already much if any experience with engine tuning, who are slightly concerned with all the hassle/costs that a standalone ECU may represent. Along with John's assitance, I learned with the Vitesse software how to adjust (through the PiggyBack) fuel delivery in function of load, RPM and manifold pressure. Within my 1.5 year with it I developed an obsession with fining the tune, particularly in low/medium load conditions, and developed the need to have better control over other parameters, main being active knock control, which is removed, in the same way that it is removed when installing an aftermarket chipset (with a manual boost controller). Coupled with the "fuel quality switch" on the KLR box, the switches on the chipboard allow to adjust ignition advance within 1 degree all over the timing map, meaning it's possible through trial and error to get as close as possible, relatively safely, to the knock threshold of a given engine. The PiggyBack may not be necessary when using a turbo John has first experience with. However, I suppose people who are going to upgrade their ECU will probably want to install a non-standard turbo in the medium term. If not then I would say the Vitesse MAF may represent an unnecessary purchase, as there are fairly good AFM chips for standard cars these days - I completely agree with edh's last sentence.