60-2 trigger

[Totto]

Hi
 

my name is Thomas and I have a trigger question:) 

 

Is it possible to use a 60-2 flywheel 

with “closed” gap Instead of open? 
 

I use a std Volvo trigger (reluctor)
 

converting a motec car to Atom x and

need to know if I have to change 

the flywheel...

 

regards Thomas 

 

[Adamw]

That sounds fine.  In fact for a high tooth count wheel it is the most correct design for a reluctor sensor to have the missing tooth area filled.

[Totto]

Hi

 

so this trigger is ok then?

 

 

 

[Totto]

Here is the trigger scope i get with the flywheel.

The rpm reading looks unstable to me. 

TriggerScopeLog.llgx

[Totto]

Thanks to link tech Crew! it is up and running now.  It was wrong polarity on the flywheel sensor.

 

Thanks from Thomas 

[Adamw]

I can confirm that the crank sensor was incorrect polarity in your earlier scope.  

However, I see another issue which is there are two teeth on the cam that occur roughly 360deg apart, this means the "Cam Pulse 1X" sync method wont work reliably.  

If you are using sequential injection/direct spark then we should be able to use the "Cam Pulse Window" sync to get reliable sync, since one cam tooth is a bit longer than the other.  Not sure how the Motec would have ever worked with this cam though - was it sometimes difficult to start with the Motec? 

[Totto]

Hi

 

yes, it use coil on plug., and seq inj.

The camshafts are updated/new so not the same as before With motec.

i Will try with CAM pulse Window

 

thanks for helping me out with this problem as well

 

Thanks from Thomas 

[Adamw]

I think sync tooth 17, trig 2 rising, 30deg window length should work.  Explanation of how it works in scope pic below (The sync tooth number is actually counted on trig 1 falling edge but since your sensor is incorrect polarity in this scope I have counted the rising edges. Sync tooth 17 usually means the 17th falling edge after the gap).

 

[Totto]

Works perfect:)

 

Thanks