I use an old Innovate LM1. It can record so you can review it on your computer.
Just a tip, it is much easier/safer to tune w/another person watching the A/F ratio gauge. I don't always have someone to watch, that is why I like to review my data log for my Syclone on a computer.
Look up Innovate. They have an assortment of products.
http://www.innovatemotorsports.com/http://www.ebay.com/itm/Innovate-MTX-L-D...ols&vxp=mtr $159 compared to what they used to cost several years ago about $1000 is much cheaper.
MBHD
