Duraspark tuning question...

[Mercury Mike]

So I got my Duraspark in... and wow. Exceptional gas mileage improvement as well as top end. Whereas before I started to lose power with my points at above 60 MPH~, it will easily go 90 now. =) Manual brakes and steering @ 90 MPH is awesome! (especially when your brakes grab to the left and you change lanes without wanting to...) Anyways, new brakes and we're good. Here's my question...

I got the Duraspark all wired up just right, and it's great. Slight hesitation from a stop, VERY slight, but I think that's in the carb (It was doing it before the conversion). Now when I punch it from a dead stop it really has the power I am looking for, but it ticks click click click click right in time with the revolution of the motor, and then cuts out after about 2 seconds. The clicking speeds up. It only does this when I punch it, otherwise, it's great through the whole RPM range... what is that?

 

[droppedbrd]

pinging maybe?

 

[Bort62]

The clicking cuts out, or the motor cuts out?

Mystery sounds are always hard to describe over the internet, but usual suspects would be a exhaust leak, a loose rocker arm, and pinging.

If its with RPM and independent of load, it's probably not pinging.

 

[mustang6]

If it's more of a snapping electrical sounding tick than a mechanical tick, it sounds like a spark jumping to ground somewhere to me. Check your wires, cap and rotor. Sometimes you can spot these in the dark with the engine running.

 

[Mercury Mike]

Ah! Sounds like a plan. It does sound like an electrical tick, and it winds up with RPM, and then the ticking cuts out. =)

 

[Bort62]

If it's more of a snapping electrical sounding tick than a mechanical tick, it sounds like a spark jumping to ground somewhere to me. Check your wires, cap and rotor. Sometimes you can spot these in the dark with the engine running.