Originally Posted by Sid Squid (Post 2696610)

I made my own as a test some years ago, get a cheapy single gauge and connect with three taps in a 'tee' arrangement. The centre tap is to the gauge and is the flutter adjuster, each other leg goes to a cylinder - no inaccuracy between gauges 'cos there's only one. Obviously less convenient than two gauges, but far more accurate than many of the other home made setups.

To use, connect each leg to a cylinder, all taps off. Open one leg tap fully and then ease open the centre tap just enough to get a suitable, constant reading, don't touch the centre tap after that. Then close that leg tap, and open the other to get a reading from that cylinder.

A gauge: Linky

Originally Posted by Sid Squid (Post 2696889)

Not that I found, it actually worked very well. Clearly you need to be sure your taps don't leak, but the ones I bought had a taper on the barrel such that the seal is excellent, this was a number of years ago but they were less than a pound each. Each cylinder's tap is used only either fully closed or fully open, as long as they seal OK they're fine, the third tap is shared between all cylinders so within reason it doesn't matter how it functions as once it's set it's the same for all cylinders.

I tested them against mercury gauges - the best kind - they were spot on.