Series 60 dual power (370/430 or 430/470) -- how does it work?

this will give you some idea of adjustable parameters with DDDL software. some of the engine brake parameters are on page 3. unfortunately this doesn't show all the available options for each parameter, but I think you will be able to figure out why, based on these settings, your engine brake is doing different things at different speeds and perhaps engine torques. ftp://ip174-71-25-32.om.om.cox.net/FreeAgent_GoFlex_Drive/Jeffords/Detroit%20MBE%20Engine%20Software/14_changeable.pdf

it's amazing to me that "drive by wire Detroit" has been around since 1987 and the 12.7 since 1998, yet here we are 2015. DY purchases a jake brake for his truck and they don't even bother to explain to him the adjustable parameters in the ecm which control how that jake brake work and inform him of his options to make it work how he wants it too. ridiculous.

 

Always thought the lower horsepower setting was on the pedal , and the higher setting was on cruise. To prompt cruise usage?

 

I've noticed a changed in turbo boost pulling hills. It will all of a sudden gain or drop 5-7 psi or more. I figured it was just the wastegate. Scan gauge doesn't show much more than 330hp though.

Anyone in Kansas City have a bully dog for a detroit? I'd love to play around with the different pre programmed economy and performance tunes they have without having to buy one first. Looks like they run over $2k.

 

do some research. I tried to post something but I guess it was TTR inappropriate. you can spend $300, do some learnin' and have a whole lot more than you will ever get with a BD.

 

I'm sure whatever didn't post would have been really useful to me. I'll just stop there. Emissions and TTR don't mix.

 

emissions is only a small part of ecm settings, it's how your engine works. selling you an engine brake and not giving you options for ecm parameter's is like selling you a printer and not giving you the driver's. let alone the OS.

 

That's Always being My understanding as well.........

 

Yes, usually there is a choice of 4 different ratings. You will typically get 3 single ratings + one dual rating (CruisePower).
For example you can select 370, 400, or 430 hp single ratings or 370/430 cruise power.
When cruise power is selected, 370 is what you get on the pedal, 430 when in cruise control.

This is in the application manual for DDEC4:
"Cruise Power is an optional engine rating which operates on a higher horsepower curve during
Cruise Control operation. The ECM provides the higher horsepower when Cruise Control is ON
and not being overridden with the foot pedal. The additional power provides an incentive for the
driver to operate in Cruise Control."

On top of that, there is the possibility, if programmed correctly and hard-wire connections are made, to use (1 or 2) external switches (or relays) to switch between the ratings by connecting digital ECU inputs to Ground.
Example:
both switches off: 370 hp
switch 1 on, switch 2 off: 400 hp
switch 1 off, switch 2 on: 430 hp
both switches on: 370/430 cruise-power

Not very likely, but check if there are any digital inputs programmed as rating switches. If 1 or 2 of them are set up as rating switch, this may causewhat you are describing. Something switching on/off the rating inputs.

The different ratings should not effect the engine brake behaviour in any way.