How much boost can oem map senzor handle..I saw people talking 10 psi some people said 14 psi..What's the truth?

 

we should put a pump to it and see how much boost we can build before it explodes

 

1.75bar map sensor. 1bar of regular atmosphere on top of you and 3/4 of a bar. 14/4~3.5
3.5x3~11

it reads to ~11 pounds

 

thanx man, can somebody confirm that?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jure &raquo;</TD></TR><TR><TD CLASS="quote">thanx man, can somebody confirm that? </TD></TR></TABLE>

That's usually how you figure out how much boost xx.xx bar MAP sensor will handle.

1 bar = 29.5 in/hg of mercury = 14.5 PSI absolute

Think of it this way: a map sensor can handle xx amount of vacuum below atmosphric pressure, and xx amount of pressure above atmospheric pressure. You can measure pressure/vacuum in bar, in/hg or psi absolute. Your typical gauge setup usually measures vacuum in in/hg and boost in psi. But the numbers can be interchanged. Absolute vacuum is the lowest reading your MAP sensor can handle. From absolute vacuum to atmospheric is 1 bar/29.5in hg/14.5 PSI absolute. That's how I understand it anyways.

The easiest way I can explain it is to take your map sensor rating and subtract 1 bar. The remainder is how much boost pressure it is good for.

Example:
1.75 bar sensor = good for 0.75 bar or 10.8 psi of boost
2.5 bar sensor = good for 1.5 bar or 21.7 psi of boost
3 bar sensor = good for 2 bar or 29 psi of boost
5 bar sensor = good for 4 bar or 58 psi of boost