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Thread: 6.2 vs 6.5 Injectors

  1. #1
    Join Date
    May 2017
    Location
    North Carolina
    Posts
    36

    Default 6.2 vs 6.5 Injectors

    This may be a dumb question but do 6.2 injectors have a higher pop rating due to compression(21.3 to 1) being higher than a 6.5 injector (18.1 to 1) compression rate.
    1995 Chevy 2500, 6.5L Diesel mostly stock 234,000 miles. Changed the water pump to HO WP, deleted the vacuum pump and added a mechanical wastegate controller made by me with info from others on the forum.

  2. #2
    Join Date
    Apr 2001
    Location
    CA
    Posts
    13,573

    Arrow

    Not a dumb question. The "18:1" compression 6.5TD is an aftermarket thing, not OEM in light trucks. 6.2L and 6.5L stock compression is similar. The 6.5TD injectors have a higher pop pressure than 6.2L and 6.5L N/A injectors. Variations of this in OEM form has been very minimal over the years.
    1985 Blazer 6.2
    2001 GMC 2500HD D/A
    dmaxmaverick@thedieselpage.com

  3. #3
    Join Date
    Feb 2017
    Location
    Buskirk, NY, US of A
    Posts
    15

    Default

    Basic math tells me the 6.5 ones are at least .3 better.

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