Ashley,
>I'm having a problem with my dato going above 150kph.
Try 180+, they call off the chase above 160 or so :)
>1st gear to 7000, 2nd to 7000, 3rd to 7000, 4th to 6000 and >stops pulling
and if you look at the tacho at this point its >bouncing from 5000-7000. If
you keep your foot flat it slowly >drops away.
>
>I originally thought it was the dizzy(points), So I replaced it >with the electronic
out of the Bluebird Series II, this did >help as before it would stop pulling
at about 5000.
>
>Any clues???
Maybe just the limitations of the ignition system. Usually an L-series dizzy
will become a bit 'jiggly' at those sort of rpm, i.e. the advance becomes unstable
( generally tends toward less advance, which is fortunate ). To get really screaming
rpm in an L4 you might need to go to crank-fire ignition, as even the S2 Bluebird
ignition relies on the dizzy/oil pump shaft to spin it.
Sounds like your plugs just aren't getting enough juice to burn the intake charge
properly - the energy-per-spark from your coil also suffers at really high rpm.
Since your tach runs from the coil, the odd tach behaviour points to an ignition
problem.
I'd check everything from coil wiring to spark plugs looking for a weak point.
DF
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