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Member
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393 Posts
Discussion Starter #1
Just did a complete EGR delete on my 6.4.

Down-loaded NEGR tunes from Spartan Website.

What is the difference between, for example, a tune marked:

250HP 1 NEGR EL and 250HP 2 NEGR EL

I understand the Early Lock designation, just not why one tune is marked 1 and one is marked 2.
 

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Junior Member
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Read the info you got with your tuner 1 is early lock and 2 is late lock ,it has to do with rear end gearing and tire size.
 
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