
there is an awful lot to this engine mapping... the carb/dizzy advance retard setup was a product of several decades & 2 world wars worth of development
do you ever read dave walkers column in PPC??? i was reading an old one the other night where an expensively mapped race car was put on his rollers & checked.. he found out that it had the same exact ignition setting, no matter what engine speed, or throttle setting was checked... then his opinions on simply relying purely on 'on the road' mapping are suitable grumpy too.

This was in an engine calibration lecture/practical session that I had taught the tutor the week before.
I have read most of daves stuff, along with many more months of work with far more qualified and experienced folks in the oem industry![]()
On road calibrate for 80% of the setup and then the rest in a cold cell and rollers.

Calibration for **** sake.
It was what the uni had to hand when we needed to build an engine.