278 replies to this topic

[frits44]

Question,

 

Are there better fuel injectors for the TDM 900, I mean maybe race injectors that fit in the system of the TDM 900.

Because race fuel injectors are much better than stock fuel injectors.

Maybe race fuel injectors  from a yamaha r1 ???

 

Have a nice day.

 

Greetings, Frits from holland

[fixitsan]

It depends what you mean by 'better'.

 

The fuel pressure is fixed (playing with the regulator would increase fueling)

 

Do you mean a better spray pattern ?

 

Perhaps a race injector just has a higher maximum flow rate, but in order to achieve that you may also need a high pressure pump, regulator, and reprogram the ECU just to be able to benefit from their higher flow rate.

 

As far as I know, just replacing an injector is not a valid approach, the system is more complex

[JBX]

Race fuel injectors are not "better" than stock fuel injectors, they may deliver more fuel, which is just more, not better.

More fuel means you have a fuel mixture that is too rich, it is as bad as a too lean mixture, but with different effects.

So "more" is not "better" in this case.

 

TDM & R1 injectors are different (although they have the same "O" ring on rail side), the R1 ones have a smaller body & bottom diameter.

Both injectors are four holes injection type orifices, but the R1 injectors are rated for the R1 engine cylinders - they are almost two time smaller than the TDM ones.

 

Oh, and fuel injectors are very expensive...

[frits44]

fixitsan and JBX thanks for the answers,

 

A member of my dutch tdm club has race camshafts in his TDM 900,

He needs more fuel in high rpm thats why I am asking.

Also if there are fuel injectors with a better spray pattern, you can get more

torque out of the stock engine.( very effective with fuel and diesel engines )

Do you men know a number or something of these fuel injectors to replace the stock

fuel injectors ???

 

Again thanks for the answers.

 

Have nice day 

 

Greetings, Frits from holland

[fixitsan]

fixitsan and JBX thanks for the answers,

 

A member of my dutch tdm club has race camshafts in his TDM 900,

He needs more fuel in high rpm thats why I am asking.

Also if there are fuel injectors with a better spray pattern, you can get more

torque out of the stock engine.( very effective with fuel and diesel engines )

Do you men know a number or something of these fuel injectors to replace the stock

fuel injectors ???

 

Again thanks for the answers.

 

Have nice day 

 

Greetings, Frits from holland

 

If he needs more fuel the best way is to modify the ECU code, or fit a tuneable ECU, or possibly modify the fuel pressure regulator (or pressure sensor signal) to allow more fuel to flow.

 

There is little or no point fitting high flow rate injectors, the existing injectors work fine......they just need to be made to fire for longer to get more fuel, or fire fuel under a higher pressure to get more flow.

 

I don't know how to do it with this bike But I know another injector won't be the answer without further modification

[Studley Ramrod]

Get some lubberly carbs on it.

[fixitsan]

Frits, did you say you were a housepainter ?

 

A good analogy is this - to get more paint on the wall, use a bigger brush...but if the tin of paint is still only 75mm across the top, and the brush is 125mm wide, do you get more paint on the wall when the brush doesn't fit the tin ?

[frits44]

fixitsan good morning,

 

No you do not get more paint, to use a bigger brush goes only faster.

 

and yes I am a house painter, but motorcycles are my hobby.

I like to know things and test things and also I like to help people to solve little problems.

 

I hope I understand your question.

 

Have a nice day.

 

Greetings, Frits from holland

[fixitsan]

fixitsan good morning,

 

No you do not get more paint, to use a bigger brush goes only faster.

 

and yes I am a house painter, but motorcycles are my hobby.

I like to know things and test things and also I like to help people to solve little problems.

 

I hope I understand your question.

 

Have a nice day.

 

Greetings, Frits from holland

 

 

Yes,yes, all good......I was trying to point out, a bigger injector will deliver more fuel...everywhere....even where it isn't needed.....difficult to control ?

[frits44]

Get some lubberly carbs on it.

 

That also what I said to the man use carbs, but he want to use the electronic injection system.

 

Thanks for the answer.

 

Greetings, Frits from holland

[frits44]

fixitsan,

 

I understand and I will tell him again to use carbs, I also think the with carbs you can tune the bike better.

There is a bike in my country, a mix of trx 850 with a tdm 900 engine,  it runs 100 HP and 110 torque 

The man who owns this machine will not give info about how he did it.

 

 

Greetings,Frits from holland

[fixitsan]

fixitsan,

 

I understand and I will tell him again to use carbs, I also think the with carbs you can tune the bike better.

There is a bike in my country, a mix of trx 850 with a tdm 900 engine,  it runs 100 HP and 110 torque 

The man who owns this machine will not give info about how he did it.

 

 

Greetings,Frits from holland

 

 

What is the best way to get the ECU to not throw up error codes when it realises that it isn't controlling the engine. It needs to be happy to control the ignition timing properly

[frits44]

fixitsan,

 

From what I have seen with the people who tune the TDM 900 engine, those people do not use the computer or other

electric things on the bike . Also all sensors comes off. only the 900cc engine with after marked ignition and big carbs

and homemade thick long exhaust pipes with short mufflers and race camshafts.

This is what the people do here, to race with the bike on the race track.

There are also a view people who race with the stock bike only using the 5 or 6 K Ohm resistance between the IAT sensor.

Its all hobby racing.

 

Have a nice day

 

Greetings, Frits from holland

[JBX]

We're in year 2016, use modern technology, not carbs or steam engines.

Why use a bike that was not made for race tracks like the TDM to go on a race track ?

Get an R6 / R1 and you'll get much more fun.

[fixitsan]

We're in year 2016, use modern technology, not carbs or steam engines.
Why use a bike that was not made for race tracks like the TDM to go on a race track ?
Get an R6 / R1 and you'll get much more fun.

R1 and R6 don't qualify for use in the twin cylinder categories..... Why cut a perfectly good 4 cyl engine in half just enter it in a twin category when there are already twin cylinder bikes which are more suited to it ☺

[JBX]

Didn't know the TDM was a twin !

 

Are you sure ?

[frits44]

Good morning Gentleman,

 

There always will be people who will do other things with the bike.

Some are racing with the TDM 900 and there are also members in the dutch club who use the 

TDM 900 for heavy off road, and some have built a Rat bike. 

It is there hobby so let them go and have fun.

 

I use my bike only on the road with fuel injection on it.

 

Have a nice day.

 

Greetings, Frits from holland

[fixitsan]

Didn't know the TDM was a twin !

 

Are you sure ?

 

 

I'ld better check, right ?

[wonkiwheel]

Read this thread on a very wet and cold Saturday afternoon, very interesting. So today at 4pm i thought sod it im going to see if i can eliminate this surging uneven power delivery -2500rpm. I considered both options but went for the easiest in my eyes, just chop the air box and move the IAT sensor, i didnt have a milling bit to hand and the light was fading.

So heres what i did, removed around 8 inches of foam from either side of the tank, chopped into the airbox removing the flap and about an inch of plastic where the main intake port is, removed plastic from the secondary intake port, moved the sensor to the front of the bike attaching it to the cowl frame with a zip tie ( didnt want to drill a hole just incase, and i thought i could eliminate wind chill, also found i didnt have a nut big enough for the sensor....drrr), set co to 40 on c1 c2. K&N already fitted, air box mod previously done, mivv cans, baffles out at the moment.  By 6pm all put back together, went for a 5/6 mile spin round town..... YES YES winner winner chicken dinner!!

I wouldnt say its perfect yet, maybe need to chop a bit more of the airbox out, put another shorter spout on and even try advancing the timing, but there is definitely a marked difference, more delicate operation of the throttle, the low speed surging/lunging has all but disappeared and my crotch thermometer says its got a bit more spurt to it. The outside temp was 10c /50f and the diag number 5 read 50 (im presuming this is the ambient temp being read by the IAT). I wasnt sure which the air induction system was and so left that for now, if someone could point me to the thread with the pics id be most grateful. 

So a very big thank you to Frits and his greetings from Holland and Fixitsan for a bloody good thread.

Edited by wonkiwheel, 20 March 2017 - 07:51 pm.