RPM limit

Quote:

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Originally Posted by GMPX

Well, that's what you get for trying to rev it like a gasser ;) .
Did you notice if the logged torque value also dropped?
I'll keep looking I guess.

Cheers,
Ross

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Sled pullers will need this removed. Hopefully I won't have to worry about going over 3500rpm. Truck does start pulling power before this it seems.:bash:

Torque value drops to 340's, rail pressure drops to 19k, flow rate drops, pulse time drops, turbo vane position goes to 0, etc.....

I have no doubt it is a limiter based on reducing desired torque, which then has the flow on effect to all the other things you noted.

Cheers,
Ross

It might be a TCM issue, if anyone has a manual transmission they can test the limit on that would be great.

Cheers,
Ross

Quote:

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Originally Posted by GMPX

It might be a TCM issue, if anyone has a manual transmission they can test the limit on that would be great.

Cheers,
Ross

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I'm not sure if it matters Ross, but in neutral or park it still limits it. I guess the tcm could still be in control. This is starting to hurt the performance on the truck as I amp up tunes.

Rob, when you say this is hurting performance, is that because you are defueling at the top of a gear before it shifts. My truck has been doing this and I thought it was because of the stock transmission (which it may still be part of the problem) and I was hoping the co-pilot would help, but I got it all installed the other day and it didn't fix the problem. I get to the top of second gear and hit 3500 RPM and it defuels hard. That's where it does it worse, but it does it in all the gears to a smaller degree.

Quote:

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Originally Posted by JoshH

Rob, when you say this is hurting performance, is that because you are defueling at the top of a gear before it shifts. My truck has been doing this and I thought it was because of the stock transmission (which it may still be part of the problem) and I was hoping the co-pilot would help, but I got it all installed the other day and it didn't fix the problem. I get to the top of second gear and hit 3500 RPM and it defuels hard. That's where it does it worse, but it does it in all the gears to a smaller degree.

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Exactly Josh, at first I also thought a transmiision slip causing defuel. I don't believe this is the case. On shift under 3350rpm, the things shifts and tears the tires up. Watch a log when RPM gets over 3400 and the thing just falls on it's face. If the tranny isn't defueling at 3350, it sure shouldn't at 3400+.

Did you try turning off torque limiting?
Engine Operation > Torque reference > parameters >B1124 enable/disable

and also verify B1115 last two columns adjusted

Quote:

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Originally Posted by mrrattle

Did you try turning off torque limiting?
Engine Operation > Torque reference > parameters >B1124 enable/disable

and also verify B1115 last two columns adjusted

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Yes torque limiting disabled and B1115 adjusted, still no go. Don't think it's possible with current software. But keep up the suggestions.:rockon:

Looks like the PPE tuner on an allison LBZ has it removed, :bawl:

Are you trying to inspire me or annoy me with that comment? ;)

Also, I cannot find the tun file you sent me with all the things you have been trying, can you please send it to me again? ross at efilive dot com.

Thanks,
Ross