Just got a OBD II Data Logger yesterday and did a lil run and got my Intake Manifold Absolute Pressure up to 63.2 inHg / 214 kPa. Is there a way i can convert this to boost pressure? And anymore Information on just what the Intake Manifold Absolute Pressure is would be nice aswell.. tks

 

There may be a better way but convert inhg to psi whic would be (inhg * .4912) - 14.7 to get boost at sea level.

 

in your case 63.2 inhg * .4912= 31.04384 psi but then you must minus your atmospheric pressure which at see level is 14.7 (this number will change with elevation and weather conditions). so 31.04384 minus 14.7 and you get 16.34psi.

To get your exact psi you need to know your actual atmospheric pressure at the time of the datalog which will not always be 14.7 thats just the standard. When you hear drag racers talk about DA they are talking about the corrected altitude or Density Altitude. which has a pretty big effect on how dense your air charge is.

 

Simple Method: 214KPA = 1,14 BAR = 16,53 Psi.

 

how did you come up with 1,14 BAR and how is that 16,53. I was never very good at math :P

 

214 KPA - 100 (atmospheric pressure) = 114 KPA = 1,14 BAR.
1,14 BAR is common value here in Germany. Then search for a BAR-PSI converter on the internet. 1,14 Bar = 16,53 PSi.

1 Bar = 14.50377 PSI

 

Might I have a boost leak or somthing 16.34psi with all the mods i have seems a lil low

These are the performance mods I have

Inmotion Full Custom Chip Tune (but i beleave this might be part of the problem SRTPowa had the tune for the 178mm ASP pulley/C3 pulley combo and all i have is the 178.. but dont know)
Needswings Custome Pulley Rap Kit
BDJRacing Intake Manifolds
Needswings intake manifold gaskets
Needswings Oil Catch Can (I hear a air suck/leak sound coming from one of the hoses runing to this if i pintch the hose it goes away)
Custome 3" Intake
AEM Dryflo filter
NGK Iridium plugs one step colder then stock, gapped to .30
LET heat exchanger upgrade
Johnson CM30 Liquid Intercooler pump upgrade
1 Gallon Intercooler tank, both moved to the trunk

 

Well i doubt your at 0 elevation so we will say you had a DA of 3500, that would put your absolute atmospheric pressure at 12.93, so redo it and plug that in 31.04 minus 12.93 = 18.11PSI

If you can tell me your Density altitude at the time you measured i can give you a pretty close number of psi your running, i dont think you have a leak that sounds about right.

 

my altutide is 482 above sea lvl Density altitude was around 30.06in i ran agen today on highway and got 65.6 inHg at 110mph