944TurboTom (Augment) did detail the development of his board for the 944 here, I cant find the topic now but some of his early experience of running it is here https://www.porscheclubgb.com/forum/tm.aspx?m=725360 To me the advantage of Vems or Augment is that you are getting new hardware to replace the original ecu in a plug in box that means you could return to the original. The original ECUs are doing very well but a few have suffered from dry joints - corrosion etc. and this number is likely to increase, so overall you should see an improvement in the longer term. It may take a lot of hours on a rolling road to set up, iron out the bugs and additional tweaking may be required later. Another advantage over other standalone units is that with these 2 there has been a lot of work with our cars, others Emerald / Motec / Link etc. will require even more work. On installation there are problems likely to arise with other components not being so 'fresh' - the ISV on my car was leaking a massive amount of air which with my Vitesse MAF which caused it to run very rich - so issues are not just found with replacement ECUs but they may be more sensitive to them. So in answer to the original question - I have considered it but on my coupe, but still thinking a new factory GM ecu to match a new GM v8 - (If only I had time to get started, hoping to bring the coupe home this year which should help) and the cab I am keeping standard as tuning likely to adversely affect its value - If the ecu failed then it would be a hard choice!Tony
EldavoAn interesting viewpoint as ever Roger (the standard, “this is what I’ve done so it must be right”). The guy I’ll use for live mapping when I get to that point is based down south. He’s a huge fan of VEMS and fits/maps them on many cars when he’s in the country. When he’s not in the country it’s because of the day job as “Senior Calibration Engineer Special Projects at Aston Martin” which means he spends lots of time at WEC races. You've admitted yourself on here before that you know very little about the Turbo or its electronics, funnily enough I do know a fair bit - but also enough to know I know nothing in the grander scale of things. The standard ECU works by guesstimating air flow based on the 30 year old AFM and corroborating that to a lookup table to sort the fuelling and hoping it all works - which it does most of the time. A Turbo also has a potentiometer throttle position sensor so it adds a granular level of throttle input to the lookup table too. Although the KLR receives a boost signal, this is for overboost protection and the ECU does not factor boost into the fuelling equation AFAIK. Many people with modified Turbos fit a wideband O2 sensor to monitor AFR and then tune fuelling to try and hit an acceptable figure under full boost. My VEMS ECU knows what air is coming into the engine, what the throttle position is and what the boost level is at any given point and then builds a 3D map of what’s going on and compares that with the map of what should be going on. It also knows, via a wideband O2 sensor, what’s coming out of the engine and is able to use this information like a modern ECU to affect fuelling, timing, etc. on the fly. Quite simply, the drivability of my Turbo has been transformed by VEMS. Off boost it is smoother, it builds boost quicker and earlier and rather than tune for full chat only and be too rich the rest of the time, I’m seeing more power across the Rev range and significantly more “area under the curve.”Oh - and with the map that mine came loaded with it started and ran first time and off I went with it in self tuning mode. Sorry, if none of that fits your narrative - especially as lots of people are buying and fitting these ECUs, just not you!
924Srr27l This thread is in regard to the harder task of tuning an N/A Engine, not the easier solution to increase more bang on a forced induction engine.
Eldavo924Srr27l This thread is in regard to the harder task of tuning an N/A Engine, not the easier solution to increase more bang on a forced induction engine. Actually, this thread is in regard to Frenchy enquiring about an aftermarket ECU for his Turbo S. You were the one that derailed it to bleat on about your car, your findings and your opinions on everything. Maybe you should take your 205hp and go wait outside while the big boys talk and provide Jim with some useful information that’s pertinent to the question he originally posed!
EldavoI suggest we remain on topic
944Turbo.... the MAF threw everything the uprated injectors and fuel pump could throw at it and probably saved the engine from breaking
John Sims I can fully understand why Jon moved away from 944's. I remember thinking at the time that concentrating on 944 Tuning wasn't perhaps the best business model as the train had probably already left the station.
EldavoI suggest we remain on topic and if you want to argue with me on a personal level that you take it to PM. Then I can ignore you and your 924 there as well.
924Srr27lEldavo - "The standard ECU works by guesstimating air flow based on the 30 year old AFM and corroborating that to a lookup table to sort the fuelling and hoping it all works" That is how it works- Wayne will play with the numbers in the look up table and as I said earlier with off the shelf chips I had to increase the spring pressure to stop it opening early. Once the AFM is fully open - around 3800rpm If I remember correctly - you are then just reliant on maps based on throttle position / rpm / knock sensor for your ignition and fueling. The modern options allow airflow monitoring throughout the full rev range, Vitesse manages it with the standard ecu but with a board in the chip socket. In addition to full range airflow monitoring you can smooth the path of the airflow and a maf or map setup is less restrictive.Tony
Eldavo - "The standard ECU works by guesstimating air flow based on the 30 year old AFM and corroborating that to a lookup table to sort the fuelling and hoping it all works"
CarreraRSRI’m no expert, but looks like it’s working well? https://youtu.be/17Jls153l8A
Dan944tWho’s 924 is this in this video? It looks to drive awesem 👍
CarreraRSRI’m no expert, but looks like it’s working well?https://youtu.be/17Jls153l8A
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