atomic 6

I need to verify a tooth count.

Can someone with a 58 tooth crankshaft, verify this,

With cyl. #1 at TDC, look inside the hole that the crank sensor goes in.
Then turn the engine in reverse rotation, counting the teeth until the missing teeth come up.

I think it should be 14 teeth from TDC to the missing teeth.

Thanks,

I know it is a little confusing, so if there are any questions, post them up.

93Z2871805

iTrader: (5)

Are you trying to identify a 58x or 24x crank/motor? If so, can you see if it's a 1 piece or 2 piece reluctor?

atomic 6

I need the offset(in degrees) that the missing teeth are from the tooth that is seen when the engine is at TDC on cyl 1.



If this was at TDC then I need the number of teeth that go by till you see the missing tooth gap in the 58x wheel. It should be 14, but I need to be sure, and I don't have a gen iv engine here right now.

That tooth number, times the 6 degrees per tooth (360/60)will give me the offset I need for phasing the correct time to spark each cyl.

TurboMonte100

iTrader: (1)

John Here is a shot of mine, I have the heads on and did the best I could to locate tdc. I marked tdc with a marker as you can see, which also looks to corespond with a small round hole. If you are counting teeth past the gap at tdc, there are 13 teeth sticking out before the missing teeth.

S10xGN

iTrader: (11)

Are you trying to align the reluctor on the crank by counting teeth? I'm sure there's a more scientific (i.e. accurate) method than this...

atomic 6

Thanks, that is exactly what I thought, It seems that hole is close to TDC, and there is the same hole on the 24x wheel(the one I am way more familiar with)

So, it is either 13 or 14 teeth, I think it is 14 because we have to trigger off of the falling edge of the tooth, and I think we will see the falling edge of the previous tooth(tooth 14) at TDC.

So at 78 or 84 degrees(84 more likely) we can program the Microsquirt to trigger correctly.

I have put together a tune and am going to send it to someone looking for one.(probably acouple people now) The tune part was easy, but the setting up the trigger wheel is alittle complex.

Thanks for the help.

atomic 6

The actual way to align the relutor wheel isn't far from what you just said...

Two of the holes in the reluctor wheel that look like they have arrows in them are used to align with two of the flywheel bolt holes.

TurboMonte100

iTrader: (1)

John the best I can tell (with heads on) is the tdc falls between 13 and 14, counting back from the missing teeth. So would it trigger from the trailing edge of 13 or 14?

atomic 6

It depends on what we want it to do, we can set it to trigger on the rising or falling edge. We just need to pick one,and then input the corresponding first tooth angle from TDC. I am working on this more now. We should have this settled soon.

I will post up in here the outcome of this whole process. Once we get this correct everybody else will be able to just use these standard settings for a GEN 4, just like the settings I gave to Denmah for the GEN 3.