Whats the best way to do this?,begin the map at 0 or -4 degrees?.
Can I in fact do this?.
Standard specs call for the ignition to begin advancing at 0-4 BTDC and at 600RPM.This a picture of the standard ignition curve.
timing After tdc
Moderators: JeffC, rdoherty, stieg, brentp
timing After tdc
Ok,I am almost ready to sort my ignition on my Mercedes 6.3 . The timing specs call for the timing at cranking speed to be 4 degrees after TDC.
Whats the best way to do this?,begin the map at 0 or -4 degrees?.
Can I in fact do this?.
Standard specs call for the ignition to begin advancing at 0-4 BTDC and at 600RPM.This a picture of the standard ignition curve.
Whats the best way to do this?,begin the map at 0 or -4 degrees?.
Can I in fact do this?.
Standard specs call for the ignition to begin advancing at 0-4 BTDC and at 600RPM.This a picture of the standard ignition curve.
Hi Ron,
Unfortunately you can only set timing down to 0 degrees BTDC.
0 degrees is pretty close to 4 ATDC, so your engine *should* start without problems. Who knows, perhaps you won't notice any difference?
What MJLJ are you running? If it's a V4 controller, you can set the cranking RPM in the global configuration options:
http://www.autosportlabs.net/MJLJ_V4_Op ... Parameters
In the V3 controller, the ignition advance cell in the upper left corner of the map is the advance used during cranking.
Let us know how it works out.
Unfortunately you can only set timing down to 0 degrees BTDC.
0 degrees is pretty close to 4 ATDC, so your engine *should* start without problems. Who knows, perhaps you won't notice any difference?
What MJLJ are you running? If it's a V4 controller, you can set the cranking RPM in the global configuration options:
http://www.autosportlabs.net/MJLJ_V4_Op ... Parameters
In the V3 controller, the ignition advance cell in the upper left corner of the map is the advance used during cranking.
Let us know how it works out.
or 1.33 Kpa? Thanks guys I'll give it a go and see how we run!910esprit wrote:1 mm Hg - 133 PaRon B. wrote:Mine is a V3 ,but i have it starting OK with 0 advance at 500RPM. In the pic i posted the right hand graph is the vacuum graph for a standard engine. How could i go about translating that into the load bins ? In the pic the vacuum is expressed in mm of mercury. Cheers!
It's OK,i think I have it . The car is running well,in fact it's insane. I still have to reorganise the Map to settle it in the 1000 1500 RPM range to give it a smoother transition. These engines develop big torque from 1000 RPM so it's difficult to get the feel for what is right or wrong until i can more miles into it. I've mounted the coils close to where the distributor was mounted,there aint' much room anywhere else.
