Bars

[NewV]

Probably a very dumb question but one I feel I should understand before I melt something. What exactly is meant by 1 Bar, 2 Bar and 3 Bar?

[ScarabEpic22]

Pretty sure it is the MAP pressure when going into boosted modes (2, 2.5, 3 Bar), I know 1Bar is regular tuning which is what most (if not all) cars/trucks come with. The 2Bar, 2.5Bar, and 3Bar OSs give more tables for tuning under boosted conditions allowing better performance when boosted.

[eboggs_jkvl]

Places where you drink or if in FI situations. 14.7 PSI is 1 bar, 2 bar is double that and so forth. It refers to Pressure. I run 12.5 PSI on top of the 1 bar 14.7 PSI so I'm not quite 2 bar under full boost.


I sure hope I got that one right! If not, I'm sure I'll hear about it.


Elmer

[NewV]

Places where you drink ...

Elmer

I understand that first part.

So if you are refering to MAP at double boost for 2BAR what controls that boost? Assuming richer AFR and more spark?

[joecar]

1 bar = 1 atm = 101.3 kPa = 14.6 psi

bar is a unit of pressure.

Normally aspirated (non-booted) creates maximum MAP of 1 bar (atmospheric);

Forced Induction (boosted) creates maximum MAP above 1 bar:
2 bar = 1 bar boost + atmospheric, 3 bar = 2 bar boost + atmospheric;
each requires the correct MAP sensor and sensor scale factor (in the COS).

What controls boost:
SC: speed of impellers (driven via belt by engine crank);
TC: exhaust gas flow and waste gate (controlled by several different methods).

[TAQuickness]

1 bar = 1 atm = 101.3 kPa = 14.6 psi

bar is a unit of pressure.

Non-boosted: 1 bar (max MAP = atmospheric);

Boosted: 2 bar (1 bar on top of atmospheric), or 3 bar (2 bar on top of atmospheric); each requires correct MAP sensor (and COS).

Then there's the whole inertial supercharging thing... !split hairs.

I owe you an ftp transfer.

[joecar]

I edited my post to add more info.

TA, no worries, take your time on the ftp transfer.

[NewV]

Thx Guys, I get it:

My car normally aspirated is 1 Bar. With a Super or Turbo Charger depending on my boost I can be higher Bar. Essentially a 3 Bar engine is one mean mofo.

joecar - I found a bolt what should I do with it?

[Tordne]

I owe you an ftp transfer.

Am I owed one

[joecar]

Thx Guys, I get it:

My car normally aspirated is 1 Bar. With a Super or Turbo Charger depending on my boost I can be higher Bar. Essentially a 3 Bar engine is one mean mofo.

joecar - I found a bolt what should I do with it?

NewV,

If you found a bolt, then it is not a lost bolt anymore, so I am not in charge of it.

Joe

Edit: Or just post it (the bolt) in the Lounge in the Lost Bolts thread.