Seeking AFR gauge or exhaust sniffer for tuning

Automotive
#1

I’m about at the point where I’m getting ready to startup the classic Mini… again… after having to replace the cracked transfer case. I can tune the engine with my colortune at idle just fine, but I was hoping to get it tuned under load. My exhaust doesn’t have a bung for a permanent AFR install, so I’ll have to settle for a temporary setup.

So either I borrow an AFR sniffer, go to a dyno with one and pay for time to tune (hopefully they like classic Minis with carburetted engines), or buy a sniffer myself and have the tool around for use in the future.

Any advice from the automotive crowd?

#2

I can ask some mechanic friends wish shops see if anyone has one laying around - might save you a few hundred bucks.

On a separate topic. I have a Classic Mini SPI. Thinking about conversion. You seem to have spend much more time researching - maybe you don’t mind me picking your brain a bit.

#3

Most dyno centers will have an AFR gauge hooked up to your car when you do tuning/baseline runs.
It’s graphed against your power curve in order to provide the info on what points you need to adjust your af.

#4

I’d love to get my hands on an exhaust sniffer for tuning my pre-OBD cars and motorcycles. I’ve got two quad-carb bikes and of course the service manuals call for tuning via sniffer meters. Those things are hard to find on the open market since nobody’s needed one in 25+ years!