Post by muttsnuts on Mar 27, 2014 20:36:24 GMT 1
Right boys and girls, hope you are all sat comfortably. 
Did some dyno tests yesterday of a programmable ignition for a 250/350LC (4L0/4L1), we all know there is plenty out there for YPVS's, Banshee's, Cheetahs and the likes, but to be honest, when I researched this I drew a complete blank for any information on one for an LC unless you wanted a full race system, which is no use whatsoever for a road bike and also very expensive.
Anyway, I choose to use my LC (yet again) as the test bike, so we all know the spec of it from my previous tests etc, so I won't bore you with that again
So here we are, I've done some testing and got some results to share with you all, first off, before I get into this, I'd like to thank Dave (Trubrit) for sorting me out an ignition system to test and also John Warrington (John-DynoStar) for putting up with me again for a whole day on the dyno - although I think we both had some fun yesterday and with the right tools on the job (me and John as I put it
), we managed - eventually to crack the problem.
I won't bore you all with the sordid details on how we got there, but it did involve alot of baselining of not only the bike, but also the dyno to ensure we was 100% sure on the results etc.
To say the initial map was err, terrible, is an understatement, but after some tweaking, ok, a sh*t load, we managed to get the bike to start to make power, initially we was struggling to make 48BHP, against the baseline of 53bhp, but slowly but surely we crept towards the 53bhp, the bike was still very reluctant to make power and was even more unwilling to set off from low rev's, I even thought at one point it was going to blow up on me !!, anyway, one small change after another eventually saw us making some head way.
There is still lots to be done and another day or maybe 2 on the dyno should see us bottoming out the potential of the unit in question when fitted to an LC, for now, we are happy that we managed to make a gain of 3bhp on the top end and in the rev range of 7k to 9k as much as 5bhp, we have yet to play with the bottom end, although we did see some gains on a prototype map we loaded at one point where we could see some very good gains at low RPM.
For now, the dyno graph below shows how the programmable ignition has lifted the power at 5700rom right up to 10,250rpm and as you will also see has made some big improvements with the big dip at high revs, some more tweaking and that should be possible to eliminate, we also believe that the lower end revs, 3000rpm to 5700rpm could also be improved alot with this unit.
There is still more to do, but initial indications are that these will be a good mod to put on an LC, plus the big pay off for the unit is that it replaces the low/high side exciter coils on the stator and also the CDI unit, all of which are known issues on the LC for causing problems etc, this eliminates that in one fell swoop, a serious consideration if you have such issues as not only will you fix your problem, but then can potentially release that locked up horsepower that is there, but you just can't access no matter what you do !
The graph below show's peak power up by 2.3bhp, but we did have 56bhp (3bhp gain) showing a few times, however, this was towards the end of the session and we had more things to try, whereas the graph below is from a saved map which we now know works, plus by then my bike was getting very hot !
The next thing to do is road test it, maybe tomorrow if the weather improves and stays dry, once I've done that I'll report back, but on the dyno it was impressive, the bike was revving much quicker the higher up the rev range it got, the one thing the dyno chart doesn't show, and I can't show, is an acceleration graph becuase we didn't set up to measure that, so no point showing one as it would be meaningless !
Anyway,. the good old "arse dyno" will tell me how much an improvement it is when I test ride it...........
Did some dyno tests yesterday of a programmable ignition for a 250/350LC (4L0/4L1), we all know there is plenty out there for YPVS's, Banshee's, Cheetahs and the likes, but to be honest, when I researched this I drew a complete blank for any information on one for an LC unless you wanted a full race system, which is no use whatsoever for a road bike and also very expensive.
Anyway, I choose to use my LC (yet again) as the test bike, so we all know the spec of it from my previous tests etc, so I won't bore you with that again
So here we are, I've done some testing and got some results to share with you all, first off, before I get into this, I'd like to thank Dave (Trubrit) for sorting me out an ignition system to test and also John Warrington (John-DynoStar) for putting up with me again for a whole day on the dyno - although I think we both had some fun yesterday and with the right tools on the job (me and John as I put it
), we managed - eventually to crack the problem.I won't bore you all with the sordid details on how we got there, but it did involve alot of baselining of not only the bike, but also the dyno to ensure we was 100% sure on the results etc.
To say the initial map was err, terrible, is an understatement, but after some tweaking, ok, a sh*t load, we managed to get the bike to start to make power, initially we was struggling to make 48BHP, against the baseline of 53bhp, but slowly but surely we crept towards the 53bhp, the bike was still very reluctant to make power and was even more unwilling to set off from low rev's, I even thought at one point it was going to blow up on me !!, anyway, one small change after another eventually saw us making some head way.
There is still lots to be done and another day or maybe 2 on the dyno should see us bottoming out the potential of the unit in question when fitted to an LC, for now, we are happy that we managed to make a gain of 3bhp on the top end and in the rev range of 7k to 9k as much as 5bhp, we have yet to play with the bottom end, although we did see some gains on a prototype map we loaded at one point where we could see some very good gains at low RPM.
For now, the dyno graph below shows how the programmable ignition has lifted the power at 5700rom right up to 10,250rpm and as you will also see has made some big improvements with the big dip at high revs, some more tweaking and that should be possible to eliminate, we also believe that the lower end revs, 3000rpm to 5700rpm could also be improved alot with this unit.
There is still more to do, but initial indications are that these will be a good mod to put on an LC, plus the big pay off for the unit is that it replaces the low/high side exciter coils on the stator and also the CDI unit, all of which are known issues on the LC for causing problems etc, this eliminates that in one fell swoop, a serious consideration if you have such issues as not only will you fix your problem, but then can potentially release that locked up horsepower that is there, but you just can't access no matter what you do !
The graph below show's peak power up by 2.3bhp, but we did have 56bhp (3bhp gain) showing a few times, however, this was towards the end of the session and we had more things to try, whereas the graph below is from a saved map which we now know works, plus by then my bike was getting very hot !
The next thing to do is road test it, maybe tomorrow if the weather improves and stays dry, once I've done that I'll report back, but on the dyno it was impressive, the bike was revving much quicker the higher up the rev range it got, the one thing the dyno chart doesn't show, and I can't show, is an acceleration graph becuase we didn't set up to measure that, so no point showing one as it would be meaningless !
Anyway,. the good old "arse dyno" will tell me how much an improvement it is when I test ride it...........
- sounds like your in a good mood.......... 
pub time for you two? 
