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Flash Programmer/Turbo Tune Question  RSS feed
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TDIwyse

Joined: 01/10/2009 06:58:20
Messages: 54
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On lost you guys have been talking about a flash programmer. From your testing on the turbo kit would you think it would be reasonable to have a higher hp tune (the low end torque is more than fine for me) that extends the hp at higher rpm for situations when one knows they won't be towing or sustaining those hp levels for very long? Thinking more of an option that would enable safe levels of higher hp for short bursts. Stop light to stop light or 1/4 mile type situations.

That flash programmer would be real nice for switching back and forth between the nominal and "crazy" tune. If so I would be extremely interested in your flash programmer.


2006 Liberty Limited CRD
2004 Ram Quad Cab 4x4 Cummins
2001 VW Jetta TDI
1990 YJ with 2006 Cummins B3.3T
GreenDieselEngineering
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Joined: 10/07/2009 07:25:47
Messages: 348
Location: Southeast Michigan
At this time we only have the one tune for the turbo kit and it meets the design criteria for turbo speed limits. We could do a secondary tune for short burst of power, but this most likely will exceed the cylinder pressure limits and turbo speed limits a bit. The short bursts most likely would not be detrimental to the head, but we would have to increase the smoke levels at high rpm because the turbo bearings do not like to be oversped.

Just to clarify, the flash tool takes a couple minutes to download the tune and requires the engine off with the ignition on. Not as fast as a switch, but it gets the job done!
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TDIwyse

Joined: 01/10/2009 06:58:20
Messages: 54
Offline
GreenDieselEngineering wrote:At this time we only have the one tune for the turbo kit and it meets the design criteria for turbo speed limits. We could do a secondary tune for short burst of power, but this most likely will exceed the cylinder pressure limits and turbo speed limits a bit. The short bursts most likely would not be detrimental to the head, but we would have to increase the smoke levels at high rpm because the turbo bearings do not like to be oversped.

Just to clarify, the flash tool takes a couple minutes to download the tune and requires the engine off with the ignition on. Not as fast as a switch, but it gets the job done!


Thanks for the info. A little smoke wouldn't be objectionable to me at all. All my diesels smoke a little at full fuel. Are the cylinder pressure limits something that can be determined by the boost/EGT's? Or is this more of a theoretical limit based on the amount of fuel/boost/timing/turbo speed/etc. that you have set the ECM levels at presently?

Also, that couple minute time frame for swapping tunes would be fine. Switching back and forth for the few times a year I tow with the CRD would not be a problem for me.

Thanks.

2006 Liberty Limited CRD
2004 Ram Quad Cab 4x4 Cummins
2001 VW Jetta TDI
1990 YJ with 2006 Cummins B3.3T
 
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