WinSU is a computer program which contains information about SU carburettor needles.
It will suggest the best needle and dashpot spring for your engine specification and allows different needle profiles to be graphically compared. It will also estimate power, torque, and many other performance related values.
This software will be useful to owners of cars equipped with SU carburettors (Austin, Triumph, Jaguar, MG, Rover, etc).
It contains extensive databases of dimensions for over 700 different needles, for both common and rare needle codes, for HS and HIF carbs of different sizes. You can graphically overlay needle profiles to show the differences in lean/richness at various throttle openings.
Screen shots from the new software!
Why do I need it?
If you have modified your engine in any way, there is a high chance that the fuel/air mixture will not be correct over the entire rev range. Running your engine with the wrong mixture can lead to serious damage!
Argh! Melted pistons! This happened after running lean due to the wrong needle!
The carburettor mixture at specific regions of the rev range can be adjusted by changing the profile (taper) of the needle. This cannot be fixed by simply adjusting the mixture screw!
Even fitting something as simple as a larger bore exhaust may drastically change the required carburation.
What does everyone else think of WinSU?
Here are some of the many positive comments I have received...
"If you are running SU carbs you really need this product, its that simple! 10 out of 10!" - David, UK
"Brilliant value for money, I would recommend this to anyone playing with Minis! - Peter, UK
"Thank you for developing such a useful tool. This program makes sense out of pages and pages of data in the SU needle book." - Tom, USA
"Cool! I've got the right needle for my engine spec now and it's running *so* much better!" - Kevin, UK
"I just used WinSU and it gave me the correct bhp for what I am running! How good is that!" - Matt, UK
"I like WinSU, very nice, and so easy to use! Well done!" - Paul, UK
"Excellent software! Just tested it and it gave an estimated BHP for my engine the same as what I got from the dyno!" - Sebastian, Finland "Thankyou for WinSU, it is very useful and is sending much power to my mini and saving me fuel." - Roland, Netherlands"A great piece of software - saved me hours of work!" - David, UK
"Just downloaded the latest version of WinSU, it's brilliant!" - Ryan, UK
"Its a nice program. For my mini it was very helpful!" - Mark, Netherlands
"Your program is a brilliant piece of software! It has been very helpful and has taught me a lot." - Jon, Oz
"Many thanks! What a great little piece of software!" - Stephen, UK"It's a wonderful program. Keep up the good work, it's quite a resource." - John, Denmark
"I tried out the WinSU program and it is the coolest thing I've ever seen!" - MiniMania website user
"Thank you very very much for this fine piece of software! I shall recommend WinSU to all my car-tinkering friends!" - Gary, UK