turbo tuning/ troubleshooting help

[knuts82]

On a dobeck you can input a given rpm and it will output a set amount of fuel depending on where you have your setpoint. On a PC5 it will add more fuel than the set program if your charge temps rise (ect.) to compensate for heat a dobeck box has no feed back to determine what the motor is doing. If your motor is hot and your charge temps are high you get the same amount of fuel as when the motor is cold and charge temps are cold since it is only based off rpm. The powercommader changes from set program using temp and A/F inputs. The box is only outputting fuel based on rpm input and its original programming no more no less. If im wrong please tell me how the dobeck box is load sensitive and not just rpm sensing.

 

[WyoBoy1000]

First off the PCV has nothing to do with this thread so take it up somewhere else. I Know how they both work, read the thread I posted and it will explain it, they both do different things, but I have never heard of it reading charge temps. You can pm if you want to hash this out. Back to topic

 

[knuts82]

I know the PC5 has nothing to do with the thread but you told him a few times the Dobeck box is load sensitive and was just making comparisons to help people to understand what you mean by load sensitive, it may differ than what others take it as. And now back to it....sorry

 

[WyoBoy1000]

For those that are unsure of what I was talking about, This is what I was talking about, if you read the thread I posted above it clarifies it.

http://www.tunewithattitude.com/

Attitude Industries provides a tuning solution for all your electronic fuel injection (EFI) needs. Our fuel controller, the Attitude Box, incorporates technology to function much like a carburetor. It takes the knowledge and tuning experience many of us have had for years and converts it to a fuel injection interface. It makes EFI tuning just like adjusting the pilot jet and mixture screws, needle, or main jet in a carburetor. Our Attitude Box contains multiple different tuning modes determined by colors that are easy to read while riding instead of trying to read a LCD screen. The different colors allow you to quickly figure out what load or RPM range you are currently in. Our fuel injection controller makes it easy to tune for different modifications. The Attitude Box is designed to be used on EFI motors that are stock or have performance enhancement products like air box mods, pipes, heads, big bore kits, nitrous, and even turbos. This EFI controller does not default computers or trip engine lights thanks to its patented ST technology. The Attitude Box works through a load based system that watches the demand on your motor and makes fuel adjustments to provide a perfectly tuned motor. Most of the time this unit plugs directly into your factory wiring harness for easy installation.

 

[catmanm7]

Conclusion to my problems is that the pure logic box had to be hooked up to the fuel pump wiring, no if ands or buts.
I had it hooked up through the rectifier using chassis ground and it did not work, I think I even tried hooking both wire to rectifier (+/-) and that didnt help.
Once I switched it to fuel pump wiring (+/-) directly I now could hold it wide open and tune, she sits nicely at 1250. A little blubber here and there to work out, but I can left off throttle in mid climb and get back on it. Hardest part is keeping skis down.
Thanks for the help guys, hope it turns out to be a good season. Sled is a blast, even at 8lbs

 

[ippielb]

Good thread, hopefully everything goes well for you throughout the season, I learned a bunch.

 

[WyoBoy1000]

Conclusion to my problems is that the pure logic box had to be hooked up to the fuel pump wiring, no if ands or buts.
I had it hooked up through the rectifier using chassis ground and it did not work, I think I even tried hooking both wire to rectifier (+/-) and that didnt help.
Once I switched it to fuel pump wiring (+/-) directly I now could hold it wide open and tune, she sits nicely at 1250. A little blubber here and there to work out, but I can left off throttle in mid climb and get back on it. Hardest part is keeping skis down.kmod can solve that, lol.
Thanks for the help guys, hope it turns out to be a good season. Sled is a blast, even at 8lbs

Always good to hear the outcome.

 

[catmanm7]

bringing back to the top for ippielb's viewing pleasure. This should answer your questions on settings