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08-24-2015, 06:10 AM
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#1 |
 
Drives: 2011 1LT RS - Red Jewel Join Date: Feb 2011
Location: Sacramento & LA
Posts: 115
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LFX PCM In A LLT
Back in the 96-99 Silverado/Tahoe days I was on a tuning forum where a few guys were going TT 383s and getting rid of the Multec Spider injection for individual injectors from marine intake manifolds. All kinds of custom FI with the L31 Vortec. The L31 PCM had limited fueling capabilities like the LLT. So guys were converting to the newer 99+ model PCM, The nickname was the 411, part of the part number. A couple guys traced all the wires and had a schematic to re-pin the plugs and use the new 411 PCM. Has anyone considered this or tried this on a LLT?
Here is one of the 411 topics. http://www.pacificp.com/forum/viewtopic.php?t=3240 A L31 PCM wire diagram 
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08-24-2015, 10:26 AM
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#2 |
         
Drives: Fastest 2010 Camaro V6 Join Date: Apr 2010
Location: Newcastle, OK
Posts: 3,571
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The LLT doesn't have limited fueling capabilities from software, the High Pressure Fuel Pump is smaller than the LFX one. Any software limitations is from failure of understanding the German logic of the Bosch ECU.
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Camaro V6 = 11.268 @ 120.11
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