FireBall XR700 points conversion ignition, GOOD or BAD?????? Options

[JBart]

I'm looking for some help on getting away from standard points and condenser.

Has anybody used or heard of anything GOOD or BAD about this unit Crane FireBall XR700 Points Conversion?


Thanks in advance,
jbart

[Twystd1]

Lemme see if I can find my old dizzy graphs from a couple of years ago Then I can tell ya what i found on used but good quality factory bosch dizzys. Pulled right out of cars here in SoCal.

If I remember correctly, the LJet and Djet curves were dam near the same when I tossed em on a dizzy machine without new springs and NOTHING else done to them. The 76 2.0 litre dizzy had a different curve that any other I have curved. It took some tab bending and very different (SBC) springs to get it close to stock 73 2.0 specs. Must of been because of smog regs or something. Crusty would probably know off the top of his head.

A carbed engine kinda needs it's own curve. On some engine you can bring in initial timing very fast and the engine likes it. Some slower. Some engine like 28 - 30 total. Some like less. Some more. I have to check by the seat of my pants and playing with the curves. Occasionaly someone steps up for a dyno visit. Then ya tweak as ya go and see what works.

I think the ONLY one I know that has enough experience at different combos to even attempt to make a spread sheet would be Jake.

Even then. Just an exhaust change can change what curve works the best.

I used to think the 12/28 setup all in by 2800 - 3200 RPM dependent on setup was the hot ticket for a carbed car. Not anymore. the fucking humidity and ambient temps changes everything. So does summer gas VS winter gas. And on and on. Ya just have to find a balance of best case VS worst case and go with it for a street car.

I helped a guy install a SVDA vacuum dizzy in place of a stocker last weekend. Made zero more HP according to our butt dyno. Yet he picked up bout 9 miles per gallon on steady state highway cruising according to his e-mail today. Makes sense really.
I am at the coffee house. More Manyana, gotta look at the home PC.
I looked for that data last year for the same question you asked here. I couldn't find it. I will look again. In truth. it isn't really important. your combination will need a curve with a minimum and max advance that will be specific to your engine, elevation, gas, temps, gears, tire size, weight, size of girl friends tits etc......

Gimme a call tomorrow night. We shoot the shit.

CCC