When the engine is idle, what is the correct vaccum reading on the oem mitsu gauge for the boost??? my is at like 25 is that normal? I saw a pic of another guys gauge his vaccumm reading was like 35 or 40 much higher than my

what is the normal reading for a stock MR?

 

mine reads straight down in the 6 o'clock position. forgot what the correlates to tho.

 

mine's always been 14-16 with both a autometer and now apex'i.

 

yah im at max 17 and with AC on its around 14 or 15.

 

on the stock Mitsu gauge I see 48-50

 

i have a feeling that the mitsu gauge is not in psi. maybe torr or something.

 

Mitsu gauge is in kg/cm^3 for boost and cm/hg for vacuum. Use www.onlineconversion.com pressure section to convert to bar or psi boost/vac gauges

 

so whats the normal reading for cm/hg? or psi please be specific

 

My is way lower than that..like around 25.so what does that mean? plus my boost reading is also all wrong...doesn't go past 1.0 on my MR

Do you guys think I got a broken boost gauge?

 

mines in like -17psi I believe... I can go start it and check lol. I have a defi-link US version gauge

 

My is NO where near the 6oclock position more like....8 o clcok does anyone know what this might mean? if my vaccum and boost reading is wrong? beside the vaccum tube bein kinked b/c I checked it dont seem to be kinked to me

 

there is no such thing as negative psi. at idling speed an engine at sea level should show a steady vacuum reading between 17" and 21" HG. A quick opening and closing of the throttle should cause vacuum to drop below 5" then rebound to 21" or more.

1 in HG = 2.54 cm HG

 

so what does it mean if ur vaccum reading is lower than normal? and boost is lower and normal

 

I have a mechanical Defi gauge and it reads around 25" HG when at idle. I just put it in two days ago and was going to ask this very same question. Is this correct????

 

hello i have autometer gauge i read 20 21 on vacumm at idle and when im shifting gears it goes to 25 or 26 ?? does that mean i have a leak or something when im at at idle i hit the gas and let go the vacumm goes all the way to 25 then slowly goes to 20 21 again thanks??? is that normal thanks