ESS G3 60-130 8 psi

[vanquishvzla]

As a friend told me years ago:

11 psi from a garden hose is not the same amount of water as a fire hose pushing 11 psi too….

that shit opened my mind back then lol

Sponsored

 

[LS1Coupe]

Boost is a meaure of restriction. If you have smaller tubing, you get more boost pressure. You can have a bigger head unit, with a larger diameter tubing moving much more air at a lower boost number, which will give you more power at that lower boost number.

I am no engineer but I don't think this is the case. If you change all your cold side piping I do not believe you will see a change the boost reading.

 

[HKusp]

Boost is a pressure. It's a measure of restriction. Explain to me how I am wrong.

 

[vanquishvzla]

I am no engineer but I don't think this is the case. If you change all your cold side piping I do not believe you will see a change the boost reading.

11 psi are 11 psi… small turbo, big turbo, etc…. But 11 psi on a small turbo won’t move the same amount of air than a big turbo at 11 psi…

perfect example with the house… where do you have more water flowing… a garden hose at 11 psi or a fire hose at 11 psi?

 

[Hammerhead13579]

I am an engineer and I think you guys do not need to argue about this.....

Look up "air density combustion engine"

 

[andrewtac]

Aren't IC engine air pumps, wouldn't the mass of air be more representative of the power being made than psi?

 

[engineermike]

Aren't IC engine air pumps, wouldn't the mass of air be more representative of the power being made than psi?

Yes and that’s actually how most modern tunes are structured - basing most everything on the air mass trapped in the cylinder. The problem is that in order to get significantly over 1 atmosphere in the cylinder, you need pressure above atmospheric (boost).

 

[andrewtac]

Yes and that’s actually how most modern tunes are structured - basing most everything on the air mass trapped in the cylinder. The problem is that in order to get significantly over 1 atmosphere in the cylinder, you need pressure above atmospheric (boost).

So 20 psi in a 1/4" hose versus 20 psi in a 4" hose would result in different mass flow rates, and lead to more available power?

 

[engineermike]

So 20 psi in a 1/4" hose versus 20 psi in a 4" hose would result in different mass flow rates, and lead to more available power?

Don’t think of it as a hose, which would just be a passage connecting a source to a destination.

Think of it as a trapped volume; the cylinder. If you have 0 deg f air at 1 bar trapped in the cylinder then the resulting engine load is 1.0 (typical ford logic) and the trapped air mass is .0017 lb (typical Chrysler logic). They don’t really care about boost, per se, as you can exceed these by 10% due to ram charging or extreme ambient conditions. However, if you want to run 1.9 load or .003 air mass, then it’s going to take pressures way over atmospheric to get there…even if you remove 100% of the restrictions.

Sponsored