Post
by Quan-Time » Sat Apr 10, 2010 7:57 am
OK.. just finished another shift, and got a few hrs before im back out again.. So here goes.. Ill try to cover what i can.
Obviously megasquirt is the computer.. Im eagerly waiting on the 3rd gen upgrade which ill mess around with and do some serious hardware hacking on that. I was tying in with the dev's and requesting some features but they have gone in the CAN direction. I personally wanted I2C, but struck out. Did some digging around on the hardware specs which were made available, and i found out what i can do. So ive already designed a hardware hack (physically altering pins and traces on the CPU and associated board) before i even saw it.. I know what i gotta do, but need to physically grab one.. Ill do that in the next 3 weeks or so. The guy who wrote Megatunix is hosting the video on youtube.
Id also like to quickly add that megatunix has a win32 port which works great. I was testing that with him for a fair while too, but i run linux on this machine (laptop) so much of that dev has stopped currently.
It will allow MUCH more options. Im planning on implimenting what i call "conditional" tuning. I want to add a linear (telescopic) gauge for the front forks. So it can measure when the front wheel is off the ground. When the gauge is at full extension, obviously your doing a wheelie.. When its at full compression, your braking REALLY hard. Useful for anti wheel and launch control. That matched with about 5 other sensors should yield some interesting results.
Wiring is a nightmare. I started doing it clean, and just gave up cos i had to alter quite a few things. Ill be making a nice clean harness which will hide quite well.
The throttles.. Ugh.. They gave me some shit.. Turns out, the head HAS been modifed. The bolt pattern for where the adapters bolt on, i had to build up some weld, then drill and tap a new hole. Other than that, it is indeed stock.
I had to remove the IAC.. Idle air contoller. Thats the thing which brings the revs up when the bikes cold.. "Auto choke" if you will. Its a solenoid which opens up a bleed hole to allow air in UNDER the butterfly. More air = more revs. Simple. The computer knows to put more fuel in too while its in "warm up" mode. All controlled by the stock temp sensor which im reading off.
The throttle cable on the stock TRX WILL NOT FIT.. For anyone who has looked at their carbs, notice the cables pull from the front of the carbs ? Well, the TDM throttles pull from the BACK side. Im currently using FJR1300 cables. Couldnt find any TDM ones. All yamaha share the same style throttle cables. The FJR one is like 120mm longer. Im currently only using the "accel" side of the cable, its all i need with the way i set it up.
My idle is a touch high atm, not sure why. I have a few ideas, but not had a chance to investigate any of them.
My left cylinder (cyl 1), STILL gets hotter faster than cyl 2.. No idea why.. Its just one of those things i guess. I honestly thought EFI and spark control would remove it. Weird.. May look into it one day.
O2 sensor is a nice "wide band" model. It returns an actual ratio rather than a "too rich" or "too lean" signal.. It tells you by how much. Great for tuning.
IM going to fabricate an alu airbox at some stage. Ill settle for pod filters in the mean time. Im going to investigate the effects of "ram air" thru the head stock. Gonna be some huge ass fibreglass fabrication but nothing i cant really handle. Getting the ducts in may be an issue, so may end up re-doing the front end of my bike.. And by that i mean "cut off the head stock and fabricate a new one".. Will also be good for trialing different trail angles. Big project, but not really to complex. Just time consuming.
I think with a nice exhaust (which ill fabricate) and the mods ive done.. I may be able to hit 90hp.. Or around that mark. With cam and what not, obviously more. Wait and see.
Whole thing so far has cost me ~$1500 AUD. That money includes:
MS2v3 ECU + 4bar MAP sensor
Throttles (TDM900) and FJR1300 cable, alu slug to make the trumpets out of.
Rolls of wire (5 colours) and a bunch of crimps.. Already had solder + iron.
WBO2 sensor
2 Iridium spark plugs, coils + leads (silicone doody whats-its..)
Cyl head + cleaning, lapping paste, valve spring compressor, etc.. Technically theres a cost in the parts and what not.
Sundry (few new stainless screws, orings, etc..)
This price DOESNT include my labor costs. But if you could do most of it yourself, and you KNEW what to do, you could get away with it for around $1100 AUD id expect. Depends how much you can scam free things via mates. Incidently the water blasting on my head was free, the plugs i got at cost price (mate works in the shop), as were most of the sundry parts, including FJR cables.
Summary is this: Am i happy with the result ? Partly.. It needs MUCH development and i need to redo HEAPS of it.. Whole subframe, whole wiring harness, make a proper airbox, etc.. Happy that it runs and "works", annoyed that i have to do stacks on it to be satisifed. Incidently, im not easily satisifed. But you guys / gals prolly knew that.
Was it easy ? Mostly yes. There were some bitchy parts which sent me insane, such as why a relay needed to be "flicked" to work (fuel pump).. Turns out it was a dud flash on the ECU.. Triple checked EVERY connection from the battery, and manually connected the battery to the pump, etc.. 2hrs later i learnt the flash i used was screwed. Most annoying. Incidently i submitted a bug and got it fixed (Megatunix / DJandruczyk - the creator). I dont find this stuff hard at all. Obviously is my job (to some extent.) So its more "time consuming / tedious" than anything. Trying to maintain a family (i have 2 kids now, one is 7weeks old as of this post) its why i had a huge ass delay,, etc.. Plus doing crazy work stuff. No submarines anymore, im now onto power station turbines and boilers.. Ugh..
Would i do it again ? Only if someone paid me. Now that i know what im doing, no biggie.. Would I provide a "kit" ? yes. If there was a need. Im not in this for profit, im in it to share knowledge and help others who want.
Am i insane ? Not sure, ask my wife / therapist.
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