20170617_095750.jpg 154.73KB 0 downloads
The ECU arrived back from Greece on Tuesday, exactly 2 weeks after posting it off. Samios flashed it and popped it in the post on the same day he received it, so all the delay was shipping time either way.
I thought I would write about it from a couple of perspectives, the performance aspects and the general riding improvements. I can appreciate that not everyone wants much more performance from what is already a pretty fast machine in the right conditions.
Maybe the best thing for me to do is to use Samios Motorsport's own claims about their product and talk about them individually.
From their web page (with dyno graphs)...here > http://www.ecu-flash...yamaha/tdm-900/
(They're also on Facebook, which is how I chose to make contact . https://www.facebook...10114722332469/ )
Their claims are....
New fuel tables
New ignition timing tables
New rev limit at 9.300 rpm
Disable AIS valve or set it in closed position
Disable O2 function
Disable low gear power limiters
Disable Deceleration fuel cut for perfect throttle response
New fan working range opens 98 and close at 94 degrees celsius
New fuel tables - it goes without saying
New ignition tables - something which a Power Commander or new cam cannot change, is the all important ignition timing
New rev limit - I've yet to explore, but I don't think there is much power up there and I prefer low down torque more, given the choice.
Disable AIS valve - Mine already was disabled
Disable O2 function - what this means is that while riding at part open throttle at steady speeds the ECU isn't trying to lean out the mixture in order to make fuel savings. Anywhere else in the performance envelope it is ignored anyway
Disable low gear power limiters... yes yes and yes again. Definite improvement in 2nd and 3rd, I will need to ask Samios if 4th is also limited because 4th gear feels better too. I am taking a bit of a risk because my gearbox has 97000 miles on it but the bike has been well cared for. I have just discovered that my clutch is slipping in 2nd and 3rd gear now, I think I can adjust it off with the cable, but that in itself should say how much more fun there is .... However, pushing out of tight corners in 2nd or 3rd on a cold wet road is now an entirely different proposition ! Extreme care with the newly smoothed out throttle is the order of the day !
Disable deceleration fuel cut - most fuel injection systems cut fuel during deceleration, to be more economical and an offshoot is that it provides more engine braking...in the case of the 900 that's a lot of engine braking. I have to say that the difference is fabulous, but dangerous at first - I have become accustomed to using all the engine braking of the 900 but a couple of times on my test ride I forgot that it wasn't there like before......but there was no harm done In addition, my wrists don't feel like they're getting a bashing as my heavy upper half flies forwards and needs supporting during engine braking. The on-off throttle response is smoooooooth now, and perky just when you need it. Coming into a corner and rolling off the throttle no longer results in the front dipping down heavily.
New fan working range - I trundled along in some town traffic in the 25 degree celsius air and the fan cam on when the needle was about 5mm-10mm below the red range. Considering that the engine will be making more heat this can only be a good thing, just in case. Over the couple of hours I was out on the bike, 'testing extensively' the needle never went over half way
Overall, I am comparing this remap to my bike which already had 4 degrees of advance and a resistor on the IAT to increase fueling a tad. Using only the inner ear dyno , I would say the Samios remap makes more top end power, and has more torque in lower revs than the 4 degree of advance gave (which itself was a good little hop up in it's own right) But it's the way it delivers it all which is really good, it almost feels like I should write to Yamaha and ask them why they didn't make them like this from the factory.....not that that would change anything
Fuel economy will certainly suffer but the remap isn't wild, it's all still very sensible to the point that if you just want to bimble about sipping fuel then you still can, but flick the wrist and it's all a bit of fun when the road conditions allow for it.
Value for money ? It costs 250 euro plus 30 euro for secured return shipping. I was thinking about how I decide if something is value for money..... I think of it like this - if I was offered 250 Euro refund plus my old map back, I would say no ?
I would have to really badly need that money in order for me to want to go back to the old ECU with a more basic feel. This just feels more refined and slick, and pokier when you need it.
I initially ran for 80 miles with the IAT resistor still attached and have since removed that to go back to a standard setup and noticed no reduction in performance, which tells me that Samios is using probably the maximum amount of fueling ( without being wasteful ). The air temps today were high for this area, and performance improves as the air temps go down so I am looking forwards to that
How long my gearbox lasts will be the testament to how well I can adapt to this
If you wish to contact Samios the first thing he will want from you is a photo of the label on your ECU, the shiny metallic label with the ECU part number on it (5PS-xxxxx-xx). Whether or not you have ABS or a factory immobiliser could be factors which affect what Samios can do for you, but I can't say for sure. The ECU I sent was from a 2002 bike, the part number ended with suffix -01. The one I had on the bike from the factory is a suffix -02 and probably cannot be reprogrammed. I don't know if the suffix is important, it may be the case that the Denso part number is more relevant....the only way to find out for sure is to send them a photo of that label
Edited by fixitsan, 17 June 2017 - 07:35 pm.