A/F meter

[john h]

All,
I'm considering welding in a bung and adding a Air/fuel tuning meter.  I was curious if anyone knows of portable meters or gauges for tuning.  I don't want to add the meter into the dash.  Also wondering if this is common or if most people are jetting based on reading the plugs.  are there any meters that use a wand in the tailpipe?  would it be wise to get something that can record the events while driving and play it back or is that over kill for a driver car, no racing. maybe jsut watch the guage and have a passenger take notes???

Thanks
John

[70chall440]

Mr Google knows...

http://www.innovatemotorsports.com/products/lm1.php

[cudabob496]

I'd check Summit.

also, don't have to weld on bung.  you just put a hole in exhaust,
and use a strap on bung.  That's what my system has.