Ms1 V3 Wasted spark to distributor

[john.p.clegg]

Dear All
Just a quickie,am running ( have been for years ) wasted spark on a ford/lotus four cylinder engine and am now trying to use a common throttle body and plenum and am experiencing explosions due to wasted ignition event when the inlet valve is open,so my theory is this...re-fit the distributor and single coil and power the coil from spark A and spark B teed together...will this work? is it that simple? or will some of the electronics/drivers be damaged?

Thanks
John

[elutionsdesign]

You don't tie Spark A and B together, you set the ignition settings to MSnS and only use Spark A.

[john.p.clegg]

Thanks

I'll look into it..

John

[Six_Shooter]

Sounds like your timing or firing order is off, the waste spark should be firing when the exhaust valve is open, not the intake valve.

[john.p.clegg]

With cam timing figures of 66/26/26/66, the overlap period is 26 btdc for i/l valve and 26 atdc for the the exhaust valve and the wasted spark occurs approx 10 btdc,therefore firing when both inlet and exhaust are open, hence my dilemma...

John