PFC boost units of measure

[bobbo]

Does anyone have any insight as to why the PFC boost menu is in Kg/cm2 and the indicated boost is in mm/hg?
I'm not a fan of gauges cluttering up my dash which is why I use the PFC display when I need to monitor pressures and temps.
Thanks for any input.

[Skym]

It's what they use in Japan, which I noticed is following what the Germans use and that includes ps. Kg/cm2 and mm/hg x100 (as shown on stock boost gauge). We use psi, hp (1ps = 1 US hp), etc.

You have to realise that Germany and Japan were allies during ww2, so swapped design's for ships, etc. Also US helped resetup the car industry in Japan after ww2 (their quality control system is actually a system they were going to use in the US) and Nissan have followed what they use in US (I think was GM design's or idea's) and they have been doing that since early 1900's.

That's why R35 GTR runs a similar transmission setup to Corvette (designed by same manufacturer, but transmission for R35 GTR is made in Japan) and ran a 5.5 litre Chevy V8 engine in 1968 R381 Lemans racecar and why small block Chevy V8 parts fit inside VH Nissan V8 engines.

[bobbo]

Thanks WikiSkym! thanks all very interesting but I still wonder why they are using 2 different units of measure for the same pressure. Especially where the conversion isn't simple.
Makes no sense to me. 1st world problems, I know.

[Skym]

You're welcome. I'm thinking old measurement (mm/hg), new measurement (kg/cm2) or metric, etc. Sometimes older people know one better than the other or one is more accurate than the other at different altitudes.