Su needle profile book
ALT9601- MAIN NEEDLE PROFILE CHART SU BOOK
When tuning any car mainly Minis’ it is essential to get the correct needle for your size engine.
This book will give you the measurement of each needle at idle up to full throttle, and what stage the needle changes sizes.
E.g. a AN needle: .090”
At idle needle is .089” thick
At half the needle is .0753” thick
At full throttle the needle is .069” thick
There are 13 stages of this needle and this book gives you every dimension