3 Bar Question
Team Owner
Joined: Jul 2002
Posts: 36,993
Likes: 68
From: This city NEVER sleeps! Frank's back yard!
Originally Posted by lplott
Dummy question: What is the 3 bar that has been floating around here lately?
Now yawl know how really stupid I can get...
Lonnie
Now yawl know how really stupid I can get...
Lonnie
I believe they are referring to a 3 bar MAP sensor. Manifold Air Pressure sensor that can measure boost up to 3 bar.
Collections Hold
Joined: May 2003
Posts: 3,520
Likes: 2
From: Tacoma WA
Or, it could be the measure for injectors. For example, most injectors are rated at 3-bar (43.51 psi), but the ls1/ls6 operate at 4-bar (58.02 psi). So, a 2001 and up ls6/ls1 GM injector at 3-bar is 24.7lb injector, and at 4-bar it's 28.5lb injector. There is more if you want/need. By the way it's not a dummy question, just means you want to learn as all of us have. 
Le Mans Master
Joined: Jan 2001
Posts: 5,786
Likes: 6
From: Lafayette Colorado
The MAP is really only 'important' in tuning Speed Density Mode tunes. If you are tuning via the MAF sensor, a 1 BAR MAP sensor is perfectly fine. A MAF tune sets the A/F ratio via the PE vs RPM table when the MAF sensor is maxed out.
Keith
Keith
