Caterpillar power harness - Page 3 - Truckers' Trucking Forum | Message Board

Brickman · #21 01.30.2008

Quote:

Originally Posted by MedicineMan

I am not real familiar with this perticular product but the way these type of systems work is that you plug them betwen the sensors and the scm and they get the signal from the sensor and change it before sending it to the ecm therby tricking the ecm into thinking there is an operating condition which there is not. Example might be altering the signal from the turbo telling the computer that boost is low thereby causing the motor to release more fuel to increase the exhaust flow therby increasing boost. etc etc.

This is the reason factories don't like things like this. they don't like people tinkering with the programing. And how well these things work is totally reliant on the person creating them and how well they know there motors.

Personally I'd go or the pittsburg power computer. It addresses all the systems not just one or two so that everything stays in sync. It is expensive but the money you will save in fuel will pa for it in no time and the grin on your face is priceless I've sen some big HP with those computers.

Any time you increase efficiency you will increase power and fuel mileage. well, as long as you can keep your foot out of it. But that's the good part of having all that power, you won't need it all like you do now

Thanks for explaining M&M. I'm concerned about engine damage. I know how much it costs to rebuild a big Kitty. And while I would like the cheap power I would really like to NOT rebuild my Kitty any time soon!

Brickman · #22 01.30.2008

My 2000 W9 does about 5.2 unless I've got a lot of idle time. Then its 4.8. Pulling an open car hauler at 75 does not lend to good mpgs either!

550hpW900L · #23 01.30.2008

It wont hurt the motor, its a 50-100hp upgrade. Ive rebuilt many CATs, 100hp will not hurt it. Neither will these harnesses. A buddy of mine is running a 3406E 15.8L factory 600hp putting down 1266whp, and i think he has done close to 1600whp on propane injection. The truck works everyday pulling a steel train in MI, weighing over the legal limit of 164k half the time, and the truck is still running strong at over 1,000,000. I guess it depends on how you drive it and take care of it, keep in mind he doesnt have to use all that power, just half throttle and he has over 700hp. Truck pulls a sled too sometimes..... Thats a bit much for me and my pockets aint as deep as his!

MedicineMan · #24 01.30.2008

it's not the hp level I'm concerned with it's the imbalance of the systems. Like I say if you are artificially altering sensor signals on some sensors but not others then you are compleatly putting your engines well being in the hands of someone you don't know and have no idea how qualified they are.
I would have no problem running a cat well over 1000hp. Heck I'm eyeballing the 1200 hp twin turbo setup for my big cam cummins alredy.
The other thing is this, .... well let me first say again that I am NOT real familiar with this system but I am very familiar with the same system they use in cars. Anyways, I know that these type of reprogramers can be detected by the manufacturers when they plug into your computer even if you have removed them. Now assuming that if they can do it then Cat probably cat too. And knowing first hand just how anal cat is what do you think they will do when you come come up with a problem, ANY problem that should be warantee work?

Brickman · #25 01.30.2008

At over 800,000 I don't have a single warranty worry.

But I agree with M&M about the system inbalance.

MedicineMan · #26 01.30.2008

your mileage can't come close to touching mine bud!!

Brickman · #27 01.31.2008

Quote:

Originally Posted by MedicineMan

your mileage can't come close to touching mine bud!!

Don't start that "mine is bigger than yours" stuff

550hpW900L · #28 01.31.2008

The boost sensor basically increases boost pressure 4-6psi, thats not unsafe, the fuel temp sensor lies to the computer about fuel temps. Basically it feels like a "cold" CAT when your first fire it up and take off with cool fuel. Once the fuel gets warm the ecu retards timing a bit. Thats what im sure the harness does, and no it cant be detected, the ecu will not register something like this. Its different than a programmer, i could care less for warranty as mine has 675k miles. Its a simple 50hp upgrade, it doesent dump fuel in, just tells the ecu the fuel is still cool and it doesent retard the s#it out of the timing. As far as CAT being anal, trust me i know, but they are also very helpfull which is more than i could ever say for cummins. First hand....

Also how do you think the pittsburgh box works? Same way it alters fuel and boost signals to the ecu and tells those sensors what to do itself, there really is no difference between the two other than adjustability and the obvious price tag.

MedicineMan · #29 01.31.2008

That's the scarriest part. more boost and advancing the timing. Advanced timing is the best way to burn a piston. as you increase power you need to retard the timing in a diesel. At least in order to keep the motor reliable. I know the diesel racers advance the timing but there isa big difference in racing and long haul pulling.
What the factory will detect is that you have been driving 11 hours and your fuel is still cold. It doesn't take a genious to figure it out. Although I agree you don't have to be concerned with no warrentee left.
Even though I don't agree with the advanced timing I still don't think it will hurt your motor as long as you watch the gauges for anything going wrong. But then again that extra 100 hp doesn't do you much good if you have to let off the pedal because you're exhaust temp is running too hot.
That's not a twin turbo cat is it? because the single turbo's on the cats are not really as big as they should be. Good for no turbo lag an fast spool up in town but for long haul trucking you are better off with a bigger turbo with more boost and sacrificing some of the turbo lag

550hpW900L · #30 01.31.2008

No i wouldnt own a twin turbo if they paid me, its a old 550hp single turbo. Turbo is upgraded to bigger one.... What you have to understand though is any modification is going against the factory, yes you can burn up a piston by advancing timing, but were not talking that much, maybe 1 degree tops. It wont hurt the motor, it just makes it run like cold fuel CAT, but you are right i wouldnt do this if i still had warranty.

If you wanna see unsafe, my first truck was a 379 with a B model CAT, big turbo, reflowed nozzles, and bottomed out fuel screws on the pump and advanced injector timing....... 841hp on the dyno and surprisingly it lasted over a million before it needed anything done, sold it to a friend later and hes still runing that very set up..... But those mechanical motor were so much easier...... Good times

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