Anyone have a bad cam?

[clcorbin]

I need to do a bit of testing for a cam sensor. Does anyone have a bad cam (damaged lobes for journals don't matter) they wouldn't mind sending my way? Needless to say, I would be more than happy to pay for shipping and your trouble.

[skids]

Please clarify.

[BA80]

I think he's trying to put together a fuel injection system skids. He needs an old cam to play with the injector firing system.

[DiverRay]

Send me a PM if you still need a cam. I have both intake and Exhaust, so take your choice. You will need to post, or at least let me know how things go as payment.

[trbig]

Early cams or later cams?

[clcorbin]

EFI conversion. I'm doing it the hard way by designing the hardware and helping to write the firmware for it, not to mention building the assorted bits I need to add to the bike (crank trigger, cam sensor, fuel header tank for pump, flat battery pack and custom charging regulator for it, etc) Harder, but actually a lot funner and I have learned a lot sense I decided to pursue this.

I have a 79 and I want to stick the sensor on the intake cam (behind the cylinder), so that would be best, but I suspect for the testing I need to do any of these cams would work just fine.

[81xsproject]

Glad to hear you're still at it, Clint. What's your intent with the cam sensor? Are you looking to go COP, sequential injection,...?

[clcorbin]

Glad to hear you're still at it, Clint. What's your intent with the cam sensor? Are you looking to go COP, sequential injection,...?

The stock ignition system on these bikes just irritates me! It was great in it's day, but ignition tech has come a LONG way in 35+ years. My plan is to use a pack of 4 LS2 coils to replace the Accel wasted spark coils I currently have.

In my bench testing, those LS2 coils are absolute flame throwers! In comparing them to my other test coil (a stock Ford pickup coil that is about 3 times the size of our bike's coils...), it kills it hands down. On the bench, the LS2 coil will throw an arc nearly an inch and strength of that arc is amazing. The Ford coil will just fire across a 5/8" gap with the same setup and with each firing, it makes a little "pop". The LS2 coils go "CRACK!" and have a much brighter, much stronger arc across a much larger gap. I like them!

The math shows using these coils even in a quasi wasted spark method (firing two coils each revolution so I don't have to know were the cam is) would still use less power than the stock coils do as dwell is limited to 8ms by the coil and 4ms by the firmware unlike the stock coils. But, given the "huge" power headroom we have in our charging systems, I really want to minimize the electrical load were possible given how much extra load I am already adding.

And, once you have a cam sensor and you have hardware that can easily support sequential, well, might as well take advantage of it.

Here is a pic of the crank trigger I've built:

[clcorbin]

Well, the test cam arrived. I was able to chuck it up in the lathe and test it at various speeds with the Yamaha R1 crank sensor and the VR sensor interface circuit I built.

I'm happy to say that I am seeing a VERY nice signal from the sensor and output from the circuit at speeds as low as 120 rpm (slowest speed the lathe can go). It also syncs perfectly at 2500 rpm (highest...). I'm definitely calling this a very successful test!

Thanks for shipping a cam to my Ray. It is appreciated.