ignition questions

[mantree91]

looking at the wiring diagram it looks like each plug is fired interdependently. Is there still a wasted spark firing on the exhaust stroke or can I time valve events off of the ignition signal? I am wanting to install fuel injection and i will need a signal that can be tied directly to a cam event if I want to use sequential injection instead of batch injection.

[Condor]

looking at the wiring diagram it looks like each plug is fired interdependently. Is there still a wasted spark firing on the exhaust stroke or can I time valve events off of the ignition signal? I am wanting to install fuel injection and i will need a signal that can be tied directly to a cam event if I want to use sequential injection instead of batch injection.

 

This is way above my pay grade, but here's a stab at it just because. The RSV ignition does have a wasted spark, and I imagine it fires on the exhaust stroke at the same degree as the power stroke. There'll be a few others that will blow this theory apart, but that OK..... :-) I don't know nuttin'.....

[mantree91]

This is way above my pay grade, but here's a stab at it just because. The RSV ignition does have a wasted spark, and I imagine it fires on the exhaust stroke at the same degree as the power stroke. There'll be a few others that will blow this theory apart, but that OK..... :-) I don't know nuttin'.....

Thanks that's what I needed to know. Looks like I will be going with batch injection unless I can workout a cam angle sensor.

 

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[bongobobny]

Fuel injection has been discussed here before, and a while back there was a guy machining injection systems that slid in where the diaphragms go, but he went out of business. A member here, Flying Fool, has the drawings. There's another member here that had a company from New York design a fuel injection system using a specially fabricated intake manifold and that system did use a sensor for ignition control. So, there's been actual projects using both sequential and batch injection. Both projects are going to cost you a lot of time and money, so you need to decide is it really worth it on a 25 to 30+ year-old bike...

[mantree91]

Fuel injection has been discussed here before, and a while back there was a guy machining injection systems that slid in where the diaphragms go, but he went out of business. A member here, Flying Fool, has the drawings. There's another member here that had a company from New York design a fuel injection system using a specially fabricated intake manifold and that system did use a sensor for ignition control. So, there's been actual projects using both sequential and batch injection. Both projects are going to cost you a lot of time and money, so you need to decide is it really worth it on a 25 to 30+ year-old bike...

That's just the thing I already have time and money in the bike with a sidecar mounted and new forks going on. I am considering doing a hybrid build with a vmx1200 head and cam for a bit more pulling power. And the efi has a cople of reasons behind it. One is to make cold starts easer when it's below freezing, 2nd part is that I have to have a project at all times. I would be making a custom manifold with bungs welded on the runners and a single throttle body.

 

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Edited November 19, 2017 by mantree91

[bongobobny]

Tell me about it, I have over 6K invested in having PCW Racing rebuild a 1300 with VMax heads alone...

[Condor]

Tell me about it, I have over 6K invested in having PCW Racing rebuild a 1300 with VMax heads alone...

Holly Rat Feathers Batman!!

[cimmer]

looking at the wiring diagram it looks like each plug is fired interdependently. Is there still a wasted spark firing on the exhaust stroke or can I time valve events off of the ignition signal? I am wanting to install fuel injection and i will need a signal that can be tied directly to a cam event if I want to use sequential injection instead of batch injection.

 

To answer your question, yes the engine does use the wasted spark method.

 

Rick F.