MAP Sensor
#1
Staging Lane
Thread Starter
Join Date: May 2010
Location: Harrisburg, PA
Posts: 86
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I'm happy with my tune, but wondering what it would take to datalog accurate MAP readings on my FI car using HPTuners. Does the tune need to change if installing a 2 or 3 bar MAP? If so, I'm assuming a 2 or 3 bar sensor reports MAP differently (i.e. 0.2v = X on the stock MAP, but Y on a 2 or 3 bar)?
#2
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Here is an easy way to look at it. A one bar sensor uses 100% of its range to report atmospheric pressure. Two bar, 1/2 scale or 50% of the range would be atmospheric, the rest is reporting boost. Up to twice atmospheric pressure. So you have to rescale the PCM. 3 bar, same thing except atmospheric pressure is only 1/3 of the range. So a two bar sensor has 1/2 the resolution of a one bar sensor, but can report twice the range. Atmospheric pressure is about 14.5 PSI, so a two bar would be fine up to 15 pounds of boost. For you hair splitters one Bar is actually 0.9869 atmospheres. One atmosphere is 14.6956 psi.
BTW: The best MAP sensors I've found are genuine GM.
Al
BTW: The best MAP sensors I've found are genuine GM.
Al
#5
TECH Regular
iTrader: (1)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
as far as addons not really but you use credits to upgrade to 2 or 3bar os which in turn doubles or triples the map range in your tables. you can't just plug a 2 bar map in.
in the editor . engine diagnostics>airflow>map sensor linear and map sensor offset. this adjusts your working range and scale.
none in the scanner that i know of unless you user define.
in the editor . engine diagnostics>airflow>map sensor linear and map sensor offset. this adjusts your working range and scale.
none in the scanner that i know of unless you user define.