2 bar and three bar questions..
10-31-2008, 11:42 PM
#1
2 bar and three bar questions.. Someone was saying that shouldn't go 3 bar unless going to the mid to upper twenties..
And that it would not work well at say 12 or 15 psi. I dont' think will ever go past 15psi anyway but thought it would be good to have the 3 bar for the extra headroom. So was I wrong just go 2 bar and then only 3 when have to and will 3bar run crappy at 18 to 20psi?
This stuff is getting confusing.
And that it would not work well at say 12 or 15 psi. I dont' think will ever go past 15psi anyway but thought it would be good to have the 3 bar for the extra headroom. So was I wrong just go 2 bar and then only 3 when have to and will 3bar run crappy at 18 to 20psi?
This stuff is getting confusing.
11-01-2008, 05:17 AM
#2
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2 bar is up to 14psi. 3 bar is up to 28psi
if your going to run 18psi you should use the 3 bar os.
it will only be crappy if the tuner has no idea what they are doing
if your going to run 18psi you should use the 3 bar os.
it will only be crappy if the tuner has no idea what they are doing
11-01-2008, 06:23 AM
#3
Not speaking from experience but I have read on here multiple times that you can run a 2-bar all the way to 19 and 20psi; it will just require a knowledgable tuner to get it there. From what I understand, the MAP sensors run on 1-5 volts so you are increasing the sensitivity on the 3-bar, which means a 2-bar will actually drive better since you have a larger window of voltage per pound of boost. 2-bar = .33volts per pound of boost. 3-bar = .17. Way more sensitive with less area for error.
11-01-2008, 11:49 AM
#4
Not speaking from experience but I have read on here multiple times that you can run a 2-bar all the way to 19 and 20psi; it will just require a knowledgable tuner to get it there. From what I understand, the MAP sensors run on 1-5 volts so you are increasing the sensitivity on the 3-bar, which means a 2-bar will actually drive better since you have a larger window of voltage per pound of boost. 2-bar = .33volts per pound of boost. 3-bar = .17. Way more sensitive with less area for error.
11-01-2008, 01:20 PM
#5
Yeah, all of the above is true, you're still talking about a 0-5 volt sensor, 1 bar will be the most accurate, then 2 bar, then 3 bar. If you can get away with a 2 bar sensor use it for the most accurate readings. If you are planning to run 18, 19, 20psi or more 3 bar would be the way to go.
Someone posted the accuracy each sensor I think 1 bar was within 2%, 2 bar was about +/- 4% and 3 bar was about 6-8% out +/-
-Bill
Someone posted the accuracy each sensor I think 1 bar was within 2%, 2 bar was about +/- 4% and 3 bar was about 6-8% out +/-
-Bill
11-02-2008, 04:15 AM
#7
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Not speaking from experience but I have read on here multiple times that you can run a 2-bar all the way to 19 and 20psi; it will just require a knowledgable tuner to get it there. From what I understand, the MAP sensors run on 1-5 volts so you are increasing the sensitivity on the 3-bar, which means a 2-bar will actually drive better since you have a larger window of voltage per pound of boost. 2-bar = .33volts per pound of boost. 3-bar = .17. Way more sensitive with less area for error.
you get a much better tune by running a 3 bar setup tho
