MPG with 265''s

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MPG with 265''s - 6/8/2008 6:31:24 PM    ndsustudent   Posts: 4 Joined: 4/12/2008 Status: offline Hi everyone! I am thinking about putting some Toyo Open Country AT''s 265/75/R15 on my stock rims on a 1996 Chev Blazer 4x4. I was wondering how much this will hurt my fuel economy and I was also wondering how to re-calibrate my spedo after I do this. Thanks Post #: 1

RE: MPG with 265''''''''s - 6/9/2008 7:49:04 AM    WolfPack Posts: 2783 Joined: 10/30/2007 From: Raleigh, NC Status: offline I lost a little under 2 mpg when going from 235/75/15 all-seasons to 265/70/15 all-terrains. As for recalibrating...you either need to reprogram your PCM (Wait4Me tuning, PCM4less), or buy a programmer (Hypertech Power Programmer III). < Message edited by WolfPack -- 6/9/2008 7:58:23 AM > _____________________________ 2000 Blazer 4d LS 4x4 - 265/70/15 General Grabber AT2s - Hunter Brush Guard - Surco Roof Rack with IPF 868s - 1.5'' Shackle + Tbar - 2'' BL (in reply to ndsustudent) Post #: 2

RE: MPG with 265''''''''''''''''s - 6/9/2008 8:13:31 AM    cliro Posts: 1209 Joined: 10/11/2007 From: Calgary, AB Status: offline or go to the dealer and have them do it. _____________________________ 2004 GMC Jimmy 4x4, 2dr. metallic cherry red. .net instead of .com (better) (in reply to WolfPack) Post #: 3

RE: MPG with 265''''''''''''''''''''''''''''''''s - 6/9/2008 8:19:46 AM    WolfPack Posts: 2783 Joined: 10/30/2007 From: Raleigh, NC Status: offline I tried that....all of my local chevy dealers said they were not equipped to make that correction for me.  _____________________________ 2000 Blazer 4d LS 4x4 - 265/70/15 General Grabber AT2s - Hunter Brush Guard - Surco Roof Rack with IPF 868s - 1.5'' Shackle + Tbar - 2'' BL (in reply to cliro) Post #: 4

RE: MPG with 265'''''''''''''''''''''''''''''''''''''''... - 6/9/2008 12:43:10 PM    ndsustudent   Posts: 4 Joined: 4/12/2008 Status: offline Thanks for the help, now any ideas on how i could regain my lost mpg? (in reply to WolfPack) Post #: 5

RE: MPG with 265'''''''''''''''''''''''''''''''''''''''... - 6/9/2008 7:16:18 PM    WolfPack Posts: 2783 Joined: 10/30/2007 From: Raleigh, NC Status: offline You would have to regear (go up to 3.73s or higher), or again with the getting the computer reprogrammed, you could modify your shift points a little...but that would adjust power a little more than mpg''s. _____________________________ 2000 Blazer 4d LS 4x4 - 265/70/15 General Grabber AT2s - Hunter Brush Guard - Surco Roof Rack with IPF 868s - 1.5'' Shackle + Tbar - 2'' BL (in reply to ndsustudent) Post #: 6

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