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Thread: trailblazer ss tuning?

  1. #31
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    Well I hear the E67 and E38 are pretty similar, and the TBSS had the E40 in 06 but for 07-09 its an E67. Lots and lots of reading in my near future I predict, any other sites anyone knows of for more info on how to tune the E67?
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, tuned, turbo mods, etc.
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  2. #32
    Member JAY4SPEED's Avatar
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    Quote Originally Posted by The Alchemist View Post
    " Definitely use premium (91+ octane) at ALL times, its a friggin LS2 motor. You paid a bunch of $$ for it, spend the extra 5 bucks a tank to make it run right."


    What he said...low octane fuel in these engines is simply a waste of space, when we use it at the customers request ( why by a V8???? ) it kills 3 deg timing out of full load to avoid knock.
    With high octane fuel use shud aim for about 18 to 19 deg fully loaded as you past through 2000rpm, rising up to 23 deg over 3200 to 4200rpm, pull out to 18 deg at peak torque, usually 4800 to 5000rpm then slowly rise up to 23 to 24 deg at the rev limiter of 6500rpm. Do a log at full load , plug those numbers in your spark map at the highlighted areas, blend the map to tidy it up and give that a go Thats just saved you a fortune in time human hours....
    Timing is everything ignition timng .....

    Mike
    Fantastic info! Thanks!

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