johanaxelson
Well-Known Member
if so, where did you put it? have pics?
not so much free space, maybe under the washer tank but that might get too hot
not so much free space, maybe under the washer tank but that might get too hot
has anyone installed a wasted spark solution?
- Thread starter johanaxelson
- Start date
decoupe
(deceased)
Wasted Spark install
I like what Sven has done a be plan to follow that route. Have a look at the m30b35 tab on his rest website http://www.larsenarchitect.com/BMW/Sections/Engine/BMW Engine Frameset.html. The coil pack is Bosch and used by late 90's Saab - still available as a new part last I checked.
A much more "age appropriate" installation than mine. http://i54.photobucket.com/albums/g120/decoupe/EFI/P1020324.jpg
I like what Sven has done a be plan to follow that route. Have a look at the m30b35 tab on his rest website http://www.larsenarchitect.com/BMW/Sections/Engine/BMW Engine Frameset.html. The coil pack is Bosch and used by late 90's Saab - still available as a new part last I checked.
A much more "age appropriate" installation than mine. http://i54.photobucket.com/albums/g120/decoupe/EFI/P1020324.jpg
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On the frame rail below the old coil.
johanaxelson
Well-Known Member
Thanks guys, appreciated.
@sfdon - I think my A/C hoses go on the frame rail, I would have to check with the shop to see exactly where they put them this time.
@decoupe - your second pic would probably not work for me, according to Swiss regulations I have to have the original airbox
Sven's solution would work though but I would prefer to have it out of the way, makes the engine area cleaner. I kinda prefer that.
Oh, I got a nice cover for the dizzy hole with it
@sfdon - I think my A/C hoses go on the frame rail, I would have to check with the shop to see exactly where they put them this time.
@decoupe - your second pic would probably not work for me, according to Swiss regulations I have to have the original airbox
Sven's solution would work though but I would prefer to have it out of the way, makes the engine area cleaner. I kinda prefer that.
Oh, I got a nice cover for the dizzy hole with it
hi johan,
pardon me, but what is a wasted spark system ?
benefits ?
applications ?
pardon me, but what is a wasted spark system ?
benefits ?
applications ?
johanaxelson
Well-Known Member
Hi deQ, I am not an export on this and I got this to use together with the MegaSquirt I am installing to optimise the ignition system and use of the MegaSquirt.
Wasted spark can be, as I understand it, be used in slightly different ways depending on what you are looking for. Cleaner burn, slightly more power and so.
Basically with this the sparks can be controlled much better, the MegaSquirt can now fully control the duration and timing of the spark. So depending on how hard I press the gas pedal the Megasquirt will look at the TPS (and air temp etc) to adapt the injectors and ignition to optimise the engine. Also, since you don't have to jump a distributor gap you get a stronger spark which leads to smaller coils.
Having several coils allows it to recharge better at high RPMs and it can use a higher voltage for the spark.
You also get rid of the distributor rotor and cap.
So all in all, lots of little optimisations.
N.B. - this is my understanding, I am sure the smarter guys will correct me
Wasted spark can be, as I understand it, be used in slightly different ways depending on what you are looking for. Cleaner burn, slightly more power and so.
Basically with this the sparks can be controlled much better, the MegaSquirt can now fully control the duration and timing of the spark. So depending on how hard I press the gas pedal the Megasquirt will look at the TPS (and air temp etc) to adapt the injectors and ignition to optimise the engine. Also, since you don't have to jump a distributor gap you get a stronger spark which leads to smaller coils.
Having several coils allows it to recharge better at high RPMs and it can use a higher voltage for the spark.
You also get rid of the distributor rotor and cap.
So all in all, lots of little optimisations.
N.B. - this is my understanding, I am sure the smarter guys will correct me
benefits
I have converted my 1994 classic range rover to this system. it runs much better now and can easily get to higher rpm. With its own Lucas system it used to run rich at most times and I couldn't do anything about the fuel mapping in the ecu.
now with the megasquirt ecu I can change the fuel mapping to get better burn, also the timing is not mechanically adjusted so the advance or retard adjustments of timing are more precise. The ecu adjusts for fuel at the cold start. All these can be programmable.
you can go with wasted spark option where one coil handles 2 cylinders or even coil over spark option where each spark plug has one coil connected to it for even better control and stronger spark. That is what race engines use most of the times. you can see a beautiful example here: http://www.e9coupe.com/forum/showthread.php?t=15162&page=2
take care
Harun
I have converted my 1994 classic range rover to this system. it runs much better now and can easily get to higher rpm. With its own Lucas system it used to run rich at most times and I couldn't do anything about the fuel mapping in the ecu.
now with the megasquirt ecu I can change the fuel mapping to get better burn, also the timing is not mechanically adjusted so the advance or retard adjustments of timing are more precise. The ecu adjusts for fuel at the cold start. All these can be programmable.
you can go with wasted spark option where one coil handles 2 cylinders or even coil over spark option where each spark plug has one coil connected to it for even better control and stronger spark. That is what race engines use most of the times. you can see a beautiful example here: http://www.e9coupe.com/forum/showthread.php?t=15162&page=2
take care
Harun
Honolulu
Well-Known Member
DeQ:
The actual answer to your question is that a wasted spark ignition fires the plug at Top Dead Center (or whatever your ignition timing is set to) every time the piston rises near the top of the cylinder. Obviously, one of those strokes will have only exhaust gas, not combustible fuel-air mix, so that firing of the plug is "wasted".
These systems are used, for example, in Hall-effect ignition sensors, such as the one in my '85 BMW K100RS motorcycle, whose fueling system is Bosch L-Jetronic as used by BMW in the 80's, after K-Jet (CIS) and before Motronic.
If the fuel-air mixture is for some reason really rich and does not burn enough on the power stroke of the engine, unpleasant things can happen if there is an ignition event as the piston is rising on what should be the exhaust stroke.
If one converts to an aftermarket fuel system, it is possible to install also a later ignition system. For this if the distributor is not retained for ignition timing, another solution is to use a Hall Effect Sensor (HES) or some other crank position determining system.
The actual answer to your question is that a wasted spark ignition fires the plug at Top Dead Center (or whatever your ignition timing is set to) every time the piston rises near the top of the cylinder. Obviously, one of those strokes will have only exhaust gas, not combustible fuel-air mix, so that firing of the plug is "wasted".
These systems are used, for example, in Hall-effect ignition sensors, such as the one in my '85 BMW K100RS motorcycle, whose fueling system is Bosch L-Jetronic as used by BMW in the 80's, after K-Jet (CIS) and before Motronic.
If the fuel-air mixture is for some reason really rich and does not burn enough on the power stroke of the engine, unpleasant things can happen if there is an ignition event as the piston is rising on what should be the exhaust stroke.
If one converts to an aftermarket fuel system, it is possible to install also a later ignition system. For this if the distributor is not retained for ignition timing, another solution is to use a Hall Effect Sensor (HES) or some other crank position determining system.