Eaton TVS 1900 , Lets talk about it.

[RoofRails]

I will admit I'm not 100% on how exactly to read these maps but I'm going to take a stab at it.

On the Map we get a flow rate at the inlet in KG/HR. It would be awesome if we could guesstimate the airflow threw our throttle body to make XXX horse power and then convert that to kg/hr.
We have Pressure ratio representing boost 1-2.5 so a 2.5 would be 22lbs of boost (2X14.7 - 14.7).
We get Rotor speed in RPM
We get efficiency XX%. This is obviously the main benefit as we all know heat is our number one issue.
We get the Force in KW this is the power used from the engine to generate the desired rotor speed , boost and inlet flow.

The Map is basically shown in the area that Eaton deems as a safe , normal condition. When comparing a 1320 at say 24000 rpms you can sort of imagine where it would land on the map if Eaton were to have expanded it. I'm also assuming that the last line shown on the map is the next given RPM line in 2K rpm increments. The top right hand corner is the Max force required to run the blower listed on the product spec for each blower. 1320 = 73KW(98HP) , 1740 = 86KW(115HP), 1900 93KW(125HP)


I'm going to use 1700 KG/HR at 2.4 Bar as the point at which to compare all 3 blowers. I'm only doing that because we know most people maxing out the 1320 are dual pulley , spinning 20K+RPM or more and making 20ish lbs of boost. Although when I convert KG/HR to CFM it seems way to high for our HP. But in the name of science we will stick with it.

At 1700KG/HR the TVS 1320 is at 55-60% efficiency and requires 98HP from your engine to achieve it. Did someone say belt slip ???

At 1700KG/HR the TVS 1740 is at the low side of 60-65% efficiency and requires 91HP to achieve it . So RPM went down from 20K to 15K. Parasitic HP loss actually went down a few HP but efficiency went up a bit.
Take this out to 1900 KG per hour and you are in the 50-60% range losing 115HP to parasitic loss.


At 1700KG/HR the TVS 1900 is in the middle of 60-65% efficiency and at less than 14000 rpms is losing 87HP to parasitic loss.
Extend that out to 1900 kg/hr and the its lower end of 60-65% efficiency and losing 108HP to parasitic loss.

This is all in how I have interpreted this data and if someone sees where I went wrong please speak up. I just stared at it long enough to start throwing some educated guesses at it LOL !!! All of this is just paper so we shall see how the new blower pans out once its sitting in a engine bay. Looks to me like as long as fitment isn't a problem there would be no reason not to go with the 1900.

The attachments go 1320 , 1740 , 1900

eaton-tvs-R1320-map.jpgEaton 1320.jpgeaton-tvs-R1740-map.jpgEaton 1740.jpgeaton-tvs-R1900-map.jpgEaton 1900.jpg

[sepheroth86]

Dual pulley folks running 23,000-24,000 rpm on their 1320 are likely using more than advertised "max force."

I would think that the max force input is based on the advertised max rotor speed.

[RoofRails]

Dual pulley folks running 23,000-24,000 rpm on their 1320 are likely using more than advertised "max force."

I would think that the max force input is based on the advertised max rotor speed.

I agree, the "Required force" one is a little harder to guess at once it leaves the chart. It doesn't look as predictable as the other measurements.

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[Brokevw31]

In the tvs1900 section Did u mean to say less than 14,000rpm or 1400 less rpm’s than the 1320?
Because if it’s spinning at 14,000rpms and cranking out 20+ psi we’ll be in business boys!!


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[RoofRails]

In the tvs1900 section Did u mean to say less than 14,000rpm or 1400 less rpm’s than the 1320?
Because if it’s spinning at 14,000rpms and cranking out 20+ psi we’ll be in business boys!!


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Good catch , I left a zero out. According to the map It's spinning at just under 14K rpms.

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[sepheroth86]

In the tvs1900 section Did u mean to say less than 14,000rpm or 1400 less rpm’s than the 1320?
Because if it’s spinning at 14,000rpms and cranking out 20+ psi we’ll be in business boys!!


Sent from my iPhone using Audizine Forum

Good catch , I left a zero out. According to the map It's spinning at just under 14K rpms.

Sent from my SM-N986U using Audizine Forum mobile app

Yes, the TVS1900 should move the same amount of air at 14,000brpm as the 1320 does ar 22,000+.

This should equate to significantly less heat.