First HPCR vs. 600

[Stab]

I'm sure this was covered else where, but I am literally on the phone trying to buy this truck.



What is involved making the first (low-hp) HPCR into a 600???



Flashing and injectors or is it much more involved??

 

[AndyMan]

You can do some searching on it if time permits you. It is my understanding that it is quite involved. I think some things about the 600 are actually lower than on a 555. Seems like rail pressure is one of those. From what I remember, they are very different. The 20HP and 45TQ numbers could easily be met on a 555 with just the addition of an edge EZ for $350. Much cheaper than trying to emulate the exact configuration of the 600.



Just my . 02

 

[GCross]

I agree with AndyMan, there are many ways to increase power and torque, but emulating a 600 would require changing injectors, pistons, fuel pump, software, and probably more. In June Spike TV's Two Guys Garage did a Cummins tour that covered many of the 600 changes, these programs get rerun a lot, if you have a chance try to find it, it will give you a good idea of the changes right from the R & D man at Cummins.

 

[Matt400]

I put a VA pressure box that made mine a 300/660. A mild box, easy install with great towing manners and its adjustable on the fly.

 

[Forrest Nearing]

do the 600's have higher compression ratio than the 555's?

 

[ESTELJ]

I will trade you I hate my 600. i am getting like 13-14 mpg and the egt's are running @ 900 cruising. i had a 555 and they ran about 700° at cruise and I got 17-19 mpg. I CANNOT STAND the turbo lag of the 600 Wish i could have an 04 again. mine got stollen and all that were left were the 04. 5's

 

[Stab]

What gears to get 13-14 mpg?



I just found out the truck has 4:10 gears!

 

[Stab]

What will it take to change to 3:73s? It has anti-spin already.



AND some sort of aux trans. Salesman can't tell anything about it!

 

[GCross]

Hey Stab, why not pass this one up and find the truck equiped the way that you want it. Your gona drive yourself into the poorhouse changing all this stuff.



-George-

 

[Stab]

That's probably what's going to happen, but it's got everything else I need (WANT)!

Plus, I can't afford a new one!

 

[ESTELJ]

mine get 13-14 and I have an auoto trans with 3:73's

 

[JVolpe]

I wish I had bought the 305/555 2004 I test drove instead of the 325/600 I wound up with.



I also get 13-14 MPG or less and I have a Cat that really makes me mad.

 

[Matt400]

I have a Cat that really makes me mad.

I don't think its the cat, my 03 came with one and I get 19. 5

 

[ESTELJ]

its not the cat. I pulled mine and went with the banks exhaust. then the afe INtake.



Wow an unpresidented change. NONE! also I dont think it changed the lag at all either. anyone know what temps their 04. 5 run at at cruise??



thanks

 

[OT-OF-HERE!!]

600 or not, and what's different

I'm sure I'll leave something out here,. . but the 600 has liquid filled valves and seats, a larger intercooler, 3 injection event, cat system, special pistons for better cooling, electronic wastegate, a bigger turbo,. . and like I said I probably forgot something. Too much to try to upgrade a different model. Yes the mileage is poor compared to previous years, but I recently did a post on a recalibration for the 600 to reduce smoke on startup and to Increase Fuel Mileage. The recalibration is suppose to be available in October, per STAR in a TSB. You'll have to request it.

 

[Matt400]

The recalibration is suppose to be available in October, per STAR in a TSB. You'll have to request it.

That will make for some happy 600 owners.