Thread: Anything you ever wanted to know about tuning and electrical systems...

dan I am going to use the brass body map sensor the only difference that I saw was the burst rating. the brass sensor is rated at 2x the max resolution where the stainless version is rated 5x max pressure.

Sounds like a plan

we will see. I plan on comming to see you when its time to tune.

I had posted a thread looking for this answer, thanks

Noob question here: what's the relativity of bars to pounds of boost? As in, 4bar = ?? lbs of boost?

14.7psi = 1 bar. further explanation in link.

Bar (unit) - Wikipedia, the free encyclopedia

That's a common mistake cortrim. I always have to double check when converting from bar to psi and make sure I get the conversion right. The conversion is 14.5 psi = 1 bar (it even says so in the link you posted). The 14.7 always creeps into your head because that's stoichiometric air/fuel ratio. =D

Joekuh if you ever want to know conversions MegaConverter 2 is great and I use it all the time. Also Google is pretty good too.

oops. At least my link is correct even if I get confused.

LOL I thought the same thing as soon as i read cortrim's response. I poorly worded my original question, so I'm going to restate it. Why are some tunes done by BAR, but others are done to PSI? My 1st guess is BAR is for NA, and PSI is for turbo tunes.

The only reason you hear bar sometimes and psi other times is because of what the writer is familiar with, what part of the world they come from, what units their tool measures, and what they think their readers will be familiar with. When I talk about my turbo car on here I say that it makes 11 psi of boost. When I talk to the folks on tuning forums I tell them it makes 175 kPa. When I talk to Europeans or Australians I tell them I make 0.75 bar of boost. It's all the same thing.

When people talk about fuel pressure they usually use bar just because that's what they're familiar with for that particular measurement, but they could easily use psi or any other pressure measurement.
When people talk about intake readings below boost commonly you will hear about inches of mercury as the measurement of pressure because that's usually the units their measuring tool reads.

You just have to realize they are all pressure measurements and get used to converting between them.