Distributor Ignition Curves

[altezzaclub]

I'm looking at CDi ignition vaguely, the Jaycar website is down today so I'm surfing all sorts...

 

I came across a well-written piece here and wondered if anyone has modified the advance curve inside their dizzy. As the author notes, the stock curve is for reliability and lack of warranty claims rather than performance, so there might be some gains to be made.

 

http://www.jcna.com/library/tech/tech0015.html

[Spencer[RL]]

I'll be watching this , very interesting! :y:

[parrot]

Absoulutely. But have it done by a distributor shop such as Performance ignition.

 

When I have modified carby engines I have always had the distributor recurved to suit the engine tune.

 

They will modify the curve and most importantly test it on the bench, plus set a maximum advance.

[camerondownunder88]

HI,

HECK YES re-graphing a dizzy to suit your car is a must do as soon as you change the cam or tune etc. Ill scann the page from Toyota book I have showwing a basic map of all the different dizzy curvs they ran in K motors.

 

I priced getting one re-graphed once at a cost of $200 here in Brisbane that was re-graph to suit motor I had to supply motor specs adn bench tested.

 

Toyota ran different curves in colder countries and in electronic 5K dizzys an aggressive advance curve so all torque was made at lower revs for van hauling so in your car a re curved dizzy is a must to get the most from your engine.

 

Cameron

[camerondownunder88]

As promised :)

 

 

[altezzaclub]

Is anyone running more max advance than stock??