Shift Schedule

[cleatus12r]

Yeah, the SD truck stuff is all over the place as far as shifting goes and although it's all relative, the shift points themselves actually don't coincide with actual road speed too well. I love the OBS trucks for that. Usually, everything is within 2 MPH on those.

The SD trucks have anticipated shifting strategies and the like that really mess with what is actually going on.

[Shaw]

So even with the anticipated shift shut off its still going to be all over the place? If I get the emulator would it make dialing in the shifts a little easier you think?

[907DAVE]

Have you tried adjusting the 3-4 Cruise instead of the 3-4 shift schedule?

Somehow those two got switched in my definitions.

[cleatus12r]

It's not just your definitions, Dave. I don't think they're "switched" per se, but it's just the way they're labeled; there wasn't exactly a manual to follow when Bill was making the definitions.

I adjust both of them the same though.....

[Shaw]

@ Dave
I set both of them the same. I was only using that particular definition for example. I have the problem with 1-2 2-3 3-4 and down shifts too. The trouble is when I try to adjust my down shifts I'm just shooting in the dark since none of the mph correspond to any of the shift points. Because of this it takes multiple times to figure out what mph a point is at. Also, its not 10mph across the board difference. Its gets smaller as the speeds lower, its not a constant.


@ Cleatus
Why do you think it makes no difference when I change my tire size rpm? I would think that should do something?

[Shaw]

Will do and Ill let you know.

What does N over V stand for? What is that parameter?

[Power Hungry]

Originally Posted by Shaw

Will do and Ill let you know.

What does N over V stand for? What is that parameter?

eNgine RPM/Vehicle Speed

[Pocket]

I fought with the same thing for a while. Even came up with a strategy for a tiered shift schedule (graphs looked like stair steps). It worked, but I learned something in the process. This is just my viewpoint, but it seems the SD's are far more sensitive to pedal input than road speed when it comes to shift points.

Once I took that approach, shift points became easy. Don't even have to use the tiered shift schedule anymore.

Sorry, nothing technical there. Just do what I did, and start disregarding road speed and focus on your pedal position. When you do that, start thinking about the fueling with your tunes. The more fuel you bring on early, the less throttle input you have to play with in regards to shift points.

Not sure if that makes any sense to anyone. If not, let me know and I can try to clarify.

[907DAVE]

Originally Posted by cleatus12r

It's not just your definitions, Dave. I don't think they're "switched" per se, but it's just the way they're labeled; there wasn't exactly a manual to follow when Bill was making the definitions.

I adjust both of them the same though.....

Yup, wasn't a knock on PHP, just something I fought with for a bit.

I too am now in the habit of making both the same, even for the 4-3 shifts.

Shaw- a emulator is the shiz!

I learned more with that damn thing in a week then I did in a entire year! If you can swing it, I would get your hands on one.

[Shaw]

Cody - your post you made is missing about changing the N/V. Anyway's I found that when I changed it to 52 the shift and converter lockup went the wrong way (making the map further off) Tonight I will put a lower number in and see if it moves it towards what Im looking for. I think this might take care of things.

Bill - I seem to have the converter pretty much locking constantly when I want it to. It just doesn't match what the map mph says. the map says 30 but then it doesn't lock till 39mph actual. If I put 21mph in the map it will lock around 30. Not a big deal, just confuses me when I try to figure it in with all other shifting.