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Thread: GM 87mm DBW Throttle Body

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  1. #1
    Join Date
    Jan 2009
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    If they were out of a flex fuel truck... yes then they are suppose to be 36# injectors, but the actually put out more like close to 40# but, the non-flex fuel trucks have 24# injectors. the only other motor that had different injectors was the 8.1L. and just because you have returnless style fuel system does not mean that your flex fuel either... that was just something they started in the 04's
    Last edited by $nake Charmer; 09-10-2009 at 10:10 AM. Reason: spelling, lol
    05 Silverado RCSB...
    LQ9, TVS 1900, 4L80e, & EFI live.


    07 Silverado VortecMAX CCSB LTZ Z-71...
    Stock... so far

    08 Cadillac Escalade 6.2 / 6.0... Wife wagon

  2. #2
    Quote Originally Posted by $nake Charmer View Post
    If they were out of a flex fuel truck... yes then they are suppose to be 36# injectors, but the actually put out more like close to 40# but, the non-flex fuel trucks have 24# injectors. the only other motor that had different injectors was the 8.1L. and just because you have returnless style fuel system does not mean that your flex fuel either... that was just something they started in the 04's
    I checked for Zeake, the PN he gave me are for the E85 injectors. Confirmed the rated flow rate with a contact at Delphi..

    And there were other injectors out there with that same intake, TBSS and SSR's with the LS2 had something between 24 and 36, but I do not have my cheat sheet in front of me to confirm the actual flow rating.

    That intake started out on the 2005 V8 Rainiers/LWB Trailblazers and Envoy's, and is on all the GenIV cathedral port motors (4.8 and 5.3L, some 6.0's like the LS2 and hybrid trucks) now.

    All "NNBS" trucks except the L92, LY6 (iron 6.0), and L76 (Aluminum 6.0) have this intake, but there are E85 and non-E85 injectors in the fuel rails, so ya gotta know the PN's..

    Rectangle port head motors have a similar looking one, but it's a bit bigger, though with the same 87 DBW TB.
    Mike
    http://kds-performance.com
    94 Silverado Z71 SCLB 4.8L LR4 Daily Driver
    93 GMC Sierra 2WD LS V8 Swap dun, run, rusted, stripped & junked
    1979 Caprice Coupe - LS Swapped - 11.76@115.8

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