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Discussion Starter #1
Does anyone knowhow much RWHP the LLY duramax came out with stock and how muck TQ is has when it it stock? Remember, Bone Stock RWHP!

I know thw it has something like 305hp and somewhere around 610ft lbs, but is that represented at the crank or is that power geting to the ground?

Can someone help me out??

Thanks,
Dwayne
 

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With the Allison drive train loss is about 20% so about 244rwhp and 488lbft tq.
 

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Discussion Starter #3
Thanks lakingslayer for the help on this.

Thanks,
Dwayne
 

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Discussion Starter #4
lakingslayer;1561599; said:
With the Allison drive train loss is about 20% so about 244rwhp and 488lbft tq.

But what if you had a ZF-6 Speed??? What would be the loss if you had that?
Just curious.:confused: :D

Thanks,
Dwayne
 

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It Depends what you will accomplish with your modification. If you wan't to have a better mpg, and adjust the ECU for that, then you don't need any mods, but if you wan't have more HP I will suggest and recomend you to get a mod on your tranny.
 

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RaceHemi;1565097; said:
Here is my 04.5 LLY, no cat, 4" exhaust, 500 miles on a fresh engine. Measured at the rear wheels on John Kennedy's Superflow.

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Hey Racehemi, looks like close to my dyno chart.
I forgot, we had a lift pump also ==> sorry
 

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Just curious. I don't have personal experience with a dyno, so bear with me... :duh:

What do the pronounced peaks at 2300 rpm represent? Is the transmission locked in one gear (ie: fourth), or is it the result of a transmission shift?

If the result of a transmission shift; are the peaks attributable to a momentary over boost condition resulting from max boost during up-shift?
 

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No, the tranny is usually locked in 4th or 5th gear. What you see is the maximal torque on the RW. This is a stock tune from GM. Usually by modified tunes you try to keep the torque horizontal in the chart = constant torque by increased rpm's.
 

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Discussion Starter #12
Thank You everyone for all your help. Thanks,
Dwayne (A.K.A. Baby Duck)
 

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So the loss is about 13% to 14% according to the dyno charts. Where the hell did I get 20%??:eek::
 

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Discussion Starter #14
I don't know lakingslayer, maybe you were thinking of a DODGE stock tranny!!!

:muahaha:

NOTHING OUT THERE LIKE A BOWTIE!!!!
:chevy::chevy::chevy::chevy::chevy::chevy::chevy::chevy:
:chevy::chevy::chevy::chevy::chevy::chevy::chevy::chevy:
:chevy::chevy::chevy::chevy::chevy::chevy::chevy::chevy:
 

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stevebos;1565587; said:
What do the pronounced peaks at 2300 rpm represent? Is the transmission locked in one gear (ie: fourth), or is it the result of a transmission shift?

If the result of a transmission shift; are the peaks attributable to a momentary over boost condition resulting from max boost during up-shift?

could this have something with the pilot injection shutting off?
 

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The pilot never got shot off, stock tune besides the idle speed that we had to adjust.
 
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