imjoesnuffy
I just break stuff!
- Joined
- Sep 13, 2005
Going to a couple different parts stores tomorrow. Which vehicles had a 3 Bar MAP that will work on a GN? Would prefer plug and play
Thanks
Thanks
When and why do you need a 3 bar map ?
Ignorant newbie needs to know...:redface:
Thanks
1 bar = 10 lbs of boost
2 bar MAP can only measure to 20 lbs of boost, when you run more boost than that you need to upgrade to the 3 bar MAP.
Actually, not quite.
0 bar = 0 atmosphere = (14 InHg vacuum)
1 bar = 1 atmosphere = (0 lbs of boost/vacuum)
2 bar = 2 atmospheres = (14-15 # of boost)
3 bar = 3 atmospheres = (28-30# of boost)
stuff in parens are the terms we use on a daily basis
etc.
ok I new the pressure measurement deal, but how does it work in the car. Does the ECM use MAP to adjust fuel ? I thought the MAF did that ?
So if you go over 2 bar ~15 psi do you need a 3 bar ?
If so what else needs to be changed along with the MAP sensor transducer ?
Thanks
In the stock setup, the MAP sensor is only used to run the boost gauge and it's a 2 bar. Which is adequate because that's all the higher the stock boost gauge goes to.
MAF controls fueling.
You wont need a 3 bar unless you're going to go speed density with a different ECU and dump the MAF.
In the stock setup, the MAP sensor is only used to run the boost gauge and it's a 2 bar. Which is adequate because that's all the higher the stock boost gauge goes to.
MAF controls fueling.
You wont need a 3 bar unless you're going to go speed density with a different ECU and dump the MAF.
1atm or atmosphere = 15psi. When we inflate a angioplasty balloon in a persons coronary artery we use a calibrated indeflator/inflation device very accurate. The outer ring is atm's and the inner ring is equivelent psi. We talk in atmospheres and in the medical record will record balloon inflations at atmosphere/ATM it's universla in the medical reecord. So as soon as I let the balloon down I will let the recorder know how many ATM and how many seconds ballon was up and what vessel. When we deploy a stent we usually deploy at higher pressures(12-18 atm) to make sure stent is good and planted into the vessel wall. Sometimes we need to post dialate and we will take a non compliant balloon to 20ATM and that is 300psi, I usually tell patients that we took that little 3mm balloon to 10x's the pressure in their cars tire. Then they understand how high a pressure we used.
Well if a balloon ruptures you hope there's not a dissection . When they do rupture it's because the plaque is hard as a rock. Most balloons have a rated burst pressure/RBP and you try to not go over RBP rated in atmospheres. If there is a dissection you stent(SS laser cut slotted tube that expands to size of the vessel. It works like internal scafolding/casing keeping the vessel patent/open.