Doing engine swap

[Chad A 14]

Well I have search this forum and a couple others for the information needed.

 

I am doing a engine swap but I am needing to know what size Gas engine.

I have read and found a couple of different formulas.

 

psi x gpm/1100

psi x gpm x .0007

 

So now I am confused as which formula is right.

 

My pump is a GP TS2021 which is 3500 psi at 5.6 gpm

I am currently running a kubota D600 3 cylinder diesel which 14 hp

 

So given the formulas above which is right

 

3500 x 5.6 = 19600 / 1100 = 17.8 hp

3500 x 5.6 = 19600 x .0007 = 13.7 hp

 

Given the engine that is currently on the pump which is 14 hp I am completely confused as to which one is right.

The unit I have is a Whitco DPO 5030.

 

Any information, help, explanation, or answers are greatly appreciated....

 

Thanks in advance,

[CNY Hood Cleaning 27]

Hi, This is the formulas I use.

 

Gas:
psi(gpm)/1024= hp

Electric:
psi(gpm)/1460=hp


diesel:
psi(gpm)/1250=hp

 

So it would be: 3500(5.6)/1250= 15.68hp

[Chad A 14]

Ok now that makes 4 different formulas.

Now with this formula it makes the gas hp even higher.

3500 x 5.6 = 19600 / 1024 = 19.2 hp gas

Which is higher than the one I had posted.

This is where I am getting confused.

Is there not and industry standard formula or is there several.

[CNY Hood Cleaning 27]

I hope I got the correct formula cause I've been using them for years now.

[Chad A 14]

Just found another formula under grainger.com

That states this for gas engine hp

Ebhp = (gpm x psi) / 1457

[Chad A 14]

I am sure you do and that's what I am trying to find out. There are so many different formulas from reputable people but the only issue is they all vary in +\- 1 to 4 hp.

Now with my kubota d600 I know it is a 14hp but it is diesel and it has more torque than a gas engine.

The only reason I am wanting to do an engine swap is because the parts are getting harder and harder to find for that engine. Not to mention the pricey side of it too.

[Badzuk 16]

Well I have search this forum and a couple others for the information needed.

 

 

My pump is a GP TS2021 which is 3500 psi at 5.6 gpm

I am currently running a kubota D600 3 cylinder diesel which 14 hp

 

 

Any information, help, explanation, or answers are greatly appreciated....

 

Thanks in advance,

I run a 18 hp Vanguard motor on that pump, runs it very well.

[Chad A 14]

Thank you both for the information. As it turns out My uncle had a couple of running D600 engines up on the farm so I have now them.

 

According to General Pump

 

For the gas engine calculation it would be... psi x gpm / 1100 = hp

[turbonyg 17]

I don't have a formula, I just look at the prebuilt units. It seems the 4gpm usually have a 13hp, 6gpm 18hp, and 8gpm 24hp gas engines. Based on knowing the torque numbers of these and yours you can probably be close enough.

[CNY Hood Cleaning 27]

I think you should be good also.. If anything you can drop the psi on the unloader a bit if the kubota has a hard time but I dought.