I know everybody is sick and tired of hearing about programmers.<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

I wanted to know if anyone has a suggestion between the Predator, and Quadzilla. I several friends that have the Quad on their LB7 and get excellent performance out of it but I don't know anyone that has one on a LLY.<o:p></o:p>

I have the Edge, Quad, and Predator for the LLY. So far I like the Edge for safety, But the Predator runs the best. The Quad is a little to agressive after defuel.

Hi, I am new to the deisel world. What is ment by "defueling" ?

Rick,

Could you expand a bit on the "edge for saftey" comment. Not sure what you mean.

Thanks,
Jim

Defueling is where the computer backs the power down for a smoother shift and less wear and tear on the drivetrain.

The Edge w/Attitude monitors the transmission for slipage, the exhaust gas temps, and will back the power down if either is near critical. It also keeps the power from coming on till the engine is warmed up.

Someone correct me if I did not explain these correctly.

Pman,

The best description I've come across is off the Allison transmission site, It states what & why for the Defueling, They call it SEM:

<TABLE width="100%" border=0><TBODY><TR><TD colSpan=2>"Q. Increasing Engine Power - If I install a kit to increase the engine power, what effect will that have on the transmission? </TD></TR><TR><TD width="5%"></TD><TD width="95%">A. The transmission controls have been highly integrated with the LB7 and LLY Duramax diesels and L18 gas engines in GM pickups. Part of this integration is that the TCM has a 'map' of each engine's torque output throughout its operating RPM. The TCM uses 'Shift Energy Management' (SEM). During most range shifts, there is more power available than necessary to maintain acceleration. The unused engine power traditionally goes into slipping clutches, and results in additional heat without adding to vehicle performance. Through engine/transmission communication, SEM is the electronic control process that reduces torque during range upshifts to a level resulting in consistent transmission output torque before and after the shift. The net result is optimized shift quality as well as reduced clutch energy."

Todd.

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Does anybody run the stock exhaust w/cat while using a chip.