Hi everyone -
Yesterday on the rolling road, everything was as expected upto about 6,250 rpm then misfiring stops it revving any further. Changed the emulsion tubes to richen it up and got another 500 rpm before misfiring, but AFR is around 13, so don't think it's a mixture prob.
Last year it loved to rev - 8000 rpm and still going.
What's changed? Not much - a new piston and rings and bearings and a new exhaust system (and less ignition advance!)
I'm thinking it's prob electrical - plugs, ignition leads, dizzy module, coil.
What do you think?
Bcr8es plugs, 280zx dizzy, old carbon leads (I've had them at least 10 yrs and got them 2nd hand), similarly old pertronix flamethrower coil.
Yesterday on the rolling road, everything was as expected upto about 6,250 rpm then misfiring stops it revving any further. Changed the emulsion tubes to richen it up and got another 500 rpm before misfiring, but AFR is around 13, so don't think it's a mixture prob.
Last year it loved to rev - 8000 rpm and still going.
What's changed? Not much - a new piston and rings and bearings and a new exhaust system (and less ignition advance!)
I'm thinking it's prob electrical - plugs, ignition leads, dizzy module, coil.
What do you think?
Bcr8es plugs, 280zx dizzy, old carbon leads (I've had them at least 10 yrs and got them 2nd hand), similarly old pertronix flamethrower coil.