ok...HO stands for high output...what does SO stand for?

 

standard output.

 

A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO.

Had to try....wasn't as hard as I thought it would be .

Cya

 

that now what I hear

 

now + not...........

 

?????

The output of the SO with the SMARTY is pretty much the same as the HO with the SMARTY running the same levels. So the power gained with the SO is actually greater than the HO.

MikeyB

 

What Mikey said x2.

 

SUPER output!

 

A SO with a Smarty just = H.O now put a Smarty on a H.O and it will eat a SO. Jesh, say that 10 times fast

You had to go back a page.

Cya

 

And where did you hear that?

The SMARTY programming is the same between the SO and HO.
So adding a SMARTY to the SO will equal the same output of the HO using the same SMARTY level.
Example, say your SO is 250hp. Set the SMARTY to level 5 (roughly 100hp measured on the HO). So now the net output is going to be about a 150hp gain since the SO had a 50hp loss with the stock programming.

MikeyB

 

How is that possible? That makes no sense to me! Does the SO run at the same egt temps and boost levels as the HO on the same power level?

 

The big difference between the SO and the HO is in the programming. There is some slight mechanical tweaking on the HO but thats about it.
Stock the SO ran cooler than the HO. That's why the HO has piston coolers.

The EGTs should be pretty close to the same using the SMARTY on both engines. And boost.

MikeyB

 

I thought the piston changes happened in the 04.5's and later

 

It's not the pistons, it's the gallery cooling. Nozzles are situated to spray oil on the bottom of the pistons for added piston cooling. The HO engines make more heat than SO engines because they put out more power in stock form. So they have gallery cooled pistons to help deal with that additional piston heat. The SO engines can put out the same horsepower with tuning, but the pistons will be running hotter. There aren't very many melted pistons happening, but cooler is better and there is a limit somewhere. For high horsepower, gallery cooling is important. Cummins thinks it's important with only 305 Horsepower. So if you tune an SO to put out more than that, and you tow heavy or race it, you might have a problem.


John

 

Dodgezilla made some good power out of his '03 SO. I believe 500+hp. I don't remember him having a piston issue.

MikeyB