Ignition Timing

[Rob Ray]

Hi all i have a herald 13/60 with a th2 fast road cam and twin Hs2 SU carbs it also has a spitfire large valve head fitted i was just wondering if anyone knew what the ignition timing should be set at it has the accuspark electronic system fitted. the car came to me with all this fitted the only thing i have done is fitted twin carbs 

[Clive]

I would start at 10 degrees, then keep advancing until it pinks under light load. Then back off a smidge. 

Of course, the distributer advance curve may no be great for the engine. But that would need to be sorted by a rolling road. Likewise needle choice. 

You may need to find out what compression that cam works with, and what you have. All too easy to have some "good" components, but unless everything is matched teh results may not be great.

[Rob Ray]

Hi Clive thanks for the speedy reply, this is the problem when you have a car that's non original i am getting there now though.