So whats the Next step in D-max Modification??

Noreaster said:
look at the date I said that, back in Jan.
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What's funny is that your post was a few days before McRat dyno'd 755, forgot to notice that.
 
Capabilities will rise as our HD component availability goes up. Probably going to start making up some main supports myself now (for the spare). Trans (which I've had a bear of a time with) and pistons seems to be the stalemate at the present time. Keeping a spare trans in the wings too.
 
I believe the trans will ALWAYS be the hold-back. Too much mass & too much oil to move that quickly. It's a great tranmission but not a RACE tranmission. Someone will need to make their own trans in the 1000 housing for it to work FASTER.
 
I'm hoping that some code changing with the TCM will solve some issues with it (no tie ups). It is a very advanced trans that needs some more TLC. I'm not ruling anything out with it yet.
 
Code changing with the TCM is all great and wonderful.....but it won't solve hardware/physical problems.
 
It will tie ups (thus broken inputs, outputs, planetaries, C3s, C4s.....). We'll have to see what the future holds in store eh?
 
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yeah, we'll see. LOL My point was that changing the TCM may help but it's about as fast as it's going to get 'without' a tie-up. If you do avoid the tie-ups then you will most likely slow the truck down. It's a catch 22 at the moment. :doh:
 
I hope I can quote this latter. Why would the truck slow down if it wasn't tieing up between gears and cooking the C3s first? Are you SURE it's as fast as it's going to get? Did you try this and find it out on yours (or is this just a guess)?
 
I said "about" as fast as it's going to get. You'll see faster.....I just don't know how much faster? It might be fast enough for 9's but 8's ...I just don't see it. ........If you set a programmer to "defuel" between shifts you will not have any tie-ups. How does this trans work? Tell me the process of shifting from 1st to 5th.
 
AHH! So it's a guess. 8s eh? Defuel between shifts does nothing for how quickly the solenoids in the valve body activate and reliese and how quickly one pack engages and disengages. This is where the TCM programming helps. The process goes like this; 1st, then 2nd, them 3rd, then 4th, then finally 5th :hehe:.
 
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Gonna have to get rid of the pulsed apply and release too. Allison or someone from Allison is going to have to help out IMO to get it to live any amount of time at 1000hp+
 
super diesel said:
AHH! So it's a guess. 8s eh? Defuel between shifts does nothing for how quickly the solenoids in the valve body activate and reliese and how quickly one pack engages and disengages. This is where the TCM programming helps. The process goes like this; 1st, then 2nd, them 3rd, then 4th, then finally 5th :hehe:.
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On the de-fuel, MY point exactly! The TCM doesn't need time ya nut! ....Please, with your vast knowledge, explain to the viewers how the Allison makes shifts. You might want to add how a 4L85E or a 48RE shifts to exemplify the difference.


If you need help, just let everyone know. :D
 
Burner said:
The TCM doesn't need time ya nut! :doh: :dead-horse-fast2:

....Please, with your vast knowledge, explain to the viewers how the Allison makes shifts.

Glad your not iritated.LOL Do I have to repeat myself too?:poke:
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Idaho CTD said:
Gonna have to get rid of the pulsed apply and release too. Allison or someone from Allison is going to have to help out IMO to get it to live any amount of time at 1000hp+
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It you get rid of the PWM a whole nother bag of worms opens up so be careful of what you wish for. Ever think how fast the TCM can command things Vs how fast the parts can truly move in the transmission? Now add fluid differences into it based on temperature, then what ever transmission mods one may or may not have and you have a recipe for disaster on your hands. It going to take better parts that work together in the tranmission along with code written for it, matched to a given power level to get it all to work together.
 
Diesel Tech said:
It you get rid of the PWM a whole nother bag of worms opens up so be careful of what you wish for. Ever think how fast the TCM can command things Vs how fast the parts can truly move in the transmission? Now add fluid differences into it based on temperature, then what ever transmission mods one may or may not have and you have a recipe for disaster on your hands. It going to take better parts that work together in the tranmission along with code written for it, matched to a given power level to get it all to work together.
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I dont disagree but it's not living now. Electronics will always move faster than mechanical parts. It may not take removing all the PWM to get it to work but it will take some. Every time it pulses it slips the clutches and most of the PWM was put in to the Allison to make the shifts smooth for a box stock truck. The owner of a 1000hp truck doesn't care about smooth. They care about putting the power to the ground and having it live. Transmissions shouldn't be like changing your oil after every race day.
 
Burner said:
I believe the trans will ALWAYS be the hold-back. Too much mass & too much oil to move that quickly. It's a great tranmission but not a RACE tranmission. Someone will need to make their own trans in the 1000 housing for it to work FASTER.
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You mean to tell me that the ALMIGHTY ALLISON actually might have some quirks???:bang :doh: :banghead:
 
Idaho CTD said:
Transmissions shouldn't be like changing your oil after every race day.
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Just when we were getting good at swapping them after each race you want to go and fix it.:hehe:

The truth is they can live but it will take hard parts as well as programming. Once you set it up for 1000HP and get it right it isn't going to work nice at 300HP and that's what people keep thinking is going to happen.
 
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