ignijet 2007 ECU
 

All we need now is to find a way to shift the dead end effect of the rev limiter to a higher range, any news on that problem Kev.

Fran, Freez was going to try a Raptor ignition module on the XT with that we be able to move the RPM. Steve_athens has a racing ECU on his bike with the standard ECU removed & his rev limiter is at 8500RPM.

I have not pushed for this mod as we have not built a XT motor that I know of that will make it's peak HP after 7200rpm. You also create a whole lot of other problems when you get the XT motor to produce it's peak HP beyond 7200 rpm with a high lift camshaft, I think I experienced it with my stage 1 Hot Cam on the dyno. The valves may start to float at those high RPM's with the standard springs with a high lift cam, you will need to remove the cylinder head & fit up rated valve springs & retainers to prevent this.

Freez is the best person to ask about this mod, as he has done it many times.

http://www.atomicmall.com/view.php?id=253509

Hi Kev.

A few questions. Where did they get this special racing ECU from? Can it be purchased via your local Yamaha dealer?

Also, I am very interested to find out why your valves are floating?

Have been running the stg 1, 2 and 3 cams on the raptors up to 9000 RPM and it works fine. Last time I checked, the Xt and raptor both uses the same part number for the springs and valves.

Freez it only showed up twice on the dyno where the motor lost instant HP around the 7000rpm mark, we put it down to valve float.

Steve is the best person to talk to about his ignijet 2007 ECU.

http://www.ignitech.cz/english/aindex.htm
http://www.ignitech.cz/english/ignijet/ignijet%202007/ignijet%202007.htm
http://www.ignitech.cz/english/ignijet/ignijet%202007/manual_ignijet_2007_en.pdf

I think we were getting off the topic a bit with this subject so I moved it to it's own thread.

The things that happen with this ecu are the following,its completely adjustable ecu that with the proper cable can fit on any bike this is good and bad because the stock values for the xt660 are unknown and you have to set every sensor-advance-injection iap-fuel,the ecu tends to run rich and it needs lot of air(stage 2 without filter inside and drilled holes is not enough),i have some start up problems especially when cold and i dont know how to set it correctly and i have tried lots of setups(something with the sensors is here).As for the camshaft i have tried with a hotcam of unknown specs because it was custom made(i have fotos of it if you can understand who it is) the bike was pulling hard until 7800rpm but the valves were doing like crazy and the bike was shaking so i removed the camshaft and i made an xt660 cam with a wilder profile the bike was dropping at 7100 rpm but valves were not having noticable problems.I have made a custom map and the bike runs smooth but there is lot of space for improvement

Thanks for the info Steve, I am sure Freez will be also interested in this ECU. As discused please can you send me your complete mapping so I can study it.

Cheers
Kev

I sent you 3 maps and the program,i forgot the instructions if you need them send me a mail to send it to you

Thanks for the ignition info.

Setting up this race unit is going to be a handful. Well, it seems that everything needs to be tuned from scratch. Not so worried about the fuel and ignition, but the other sensors worries me. I have no idea how to incorporate the air and temp sensors, as you will need them to ensure the bike runs smooth all year round.

Does it come with some instructions or software that already incorporates the other sensors (air temp and pressure) and reads them correctly?

Now, not sure of we need to make another topic about the valve springs, but in what gear did you guys find this "loss of power" problem.

I find it very strange why the valves on the XT will float, yet on the raptor hardly anyone ever have problems with them, even at 9000 RPM. As a precaution, I run special valves with my builds. They are stainless, but lighter than stock, so the springs should handle them better. But again, even stock valves don�t give problems on the raptors and I almost exclusively use stg 2 and 3 cams.

Reason why I am asking about what gear you are tuning in. Maybe, the XT has a speed limiter in it, just like the raptor. So, when you reach speeds not capable on the stock bike, the ECU will retard the timing and reduce power output.

I don't know, just thinking outside the box here.

Will confirm with Yamaha about the springs, valves and rockers on the XT and raptor to see if they match, If they do, and so far I am almost 100% sure the springs and valves match, then I cannot see why the XT will have valve float problems and the raptor not, unless the rocker ration on the XT is more and lifting the valves more than on the raptor.

If I recall correctly, the Xt�s cam has more lift than the stock raptor cam, so I have always thought that the XT would handle higher lifts better than the raptor. That�s based on measuring the cam lobe height between the XT and raptor.

[quote=Freez;112484] Thanks for the ignition info.

Setting up this race unit is going to be a handful. Well, it seems that everything needs to be tuned from scratch. Not so worried about the fuel and ignition, but the other sensors worries me. I have no idea how to incorporate the air and temp sensors, as you will need them to ensure the bike runs smooth all year round. I agree this ECU will be have full 3D mapping, which will really complicate things.

Does it come with some instructions or software that already incorporates the other sensors (air temp and pressure) and reads them correctly?

Now, not sure of we need to make another topic about the valve springs, but in what gear did you guys find this "loss of power" problem. If I remember right it was in 2nd when we were doing 1st to 5th gear runs, at the end of the mapping.

I find it very strange why the valves on the XT will float, yet on the raptor hardly anyone ever have problems with them, even at 9000 RPM. As a precaution, I run special valves with my builds. They are stainless, but lighter than stock, so the springs should handle them better. But again, even stock valves don’t give problems on the raptors and I almost exclusively use stg 2 and 3 cams. That was the only thing I could think of at the time that might have caused the sudden power loss. Steve also mentioned with the Hot cam his was not right around the 8000rpm mark, he changed to his re-ground XT cam it did not have this problem. So may be, it might have something to do with the cam profile, with the rate of lift off the base circle being different, just thinking of a different angle to why.

Reason why I am asking about what gear you are tuning in. Maybe, the XT has a speed limiter in it, just like the raptor. So, when you reach speeds not capable on the stock bike, the ECU will retard the timing and reduce power output. Could quite well be, not to sure on that.

I don't know, just thinking outside the box here. I like your thinking. I never felt it while ridding.

Will confirm with Yamaha about the springs, valves and rockers on the XT and raptor to see if they match, If they do, and so far I am almost 100% sure the springs and valves match, then I cannot see why the XT will have valve float problems and the raptor not, unless the rocker ration on the XT is more and lifting the valves more than on the raptor. I think we need to measure the spring force to get an accurate indication of the springs.

If I recall correctly, the Xt’s cam has more lift than the stock raptor cam, so I have always thought that the XT would handle higher lifts better than the raptor. That’s based on measuring the cam lobe height between the XT and raptor.

Freez retard limiter is also adjustable with this ecu i dont think that this is the problem.The sensors is the pain in the whole story and i have serious problem with starting the bike especially when cold,you have to press the button for 2 seconds to start the bike(when it is cold it is much more)while with the stock ecu opens instantly when you press it,i assume that it doesnt give enough volts to start because when the ecu is connected to pc you can see the sensors volts or air pressure,no matter what fuel and advance settings i used start up isnt fixed so i think the spark it sends is not enough