NPI Heads

Discussion in '96-04 - 2V Specific' started by STNG_96, Mar 1, 2007.

  1. STNG_96

    STNG_96 Active Member

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    So I have the opportunity to snag a set of stock pi heads for next to nothing. I was thinking about getting them, and working on them as money allows, work including a different valvetrain, p&p, and some bigger cams, what do you guys think? I know lots of people don't even bother with npi's, but like I say, this would kinda sorta be a budget project.
     
  2. DropTopPony

    DropTopPony Administrator Staff Member Admin SN95 Supporter

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    what year are they and off what? NPI's are very good when worked over and have a valve job.
     
  3. STNG_96

    STNG_96 Active Member

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    They are off a 98. I know a guy that will do a 3 angle valve job, p&p, and completely rebuild them for 130, so. What kinda tuning would I need if I had this stuff done?
     
  4. DropTopPony

    DropTopPony Administrator Staff Member Admin SN95 Supporter

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    98 is the best npi head to start with...thats a good deal, make sure you put the extra money into larger valves even if they are stock pi valves.
    You should get a good dyno tune after all the work. SCT preferably.
     
  5. Adam

    Adam Member

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    No offense but $130 to do a port and polish job? Anyone cab grind on heads, spend the money where it counts. Hire someone who has proven porting skills on NPI...Renegade Racing maybe? Some porters won't even touch NPI heads.
     
  6. STNG_96

    STNG_96 Active Member

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    My roommate and best friend is the one doing it for me, his dad has a shop in STL, thats why its so cheap. Im not looking for a dollar store port job
     
  7. gt96stang

    gt96stang Well-Known Member

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    why is the 98 heads the best.. I thought they were all the same? :dunno:
     
  8. DropTopPony

    DropTopPony Administrator Staff Member Admin SN95 Supporter

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    Better casting, better exhaust port...Jim at Renegade prefers these and will look for that particular casting number when doing npi heads.
     
  9. voidfinger

    voidfinger Well-Known Member

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    Why are they better casting and how is the exhaust port better? whats the number on them anyway?
     
  10. Whistler98

    Whistler98 Active Member

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    The 98's came with 10 more hp but I thought that was in the tune.
     
  11. quickstang_1994

    quickstang_1994 Well-Known Member

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    It was the tune
     
  12. firstonraceday

    firstonraceday Active Member

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    130 bucks for a p&p job is a good deal.... The machine shop where I live charges like 800... they also encourage that everyone try it once. Its not as easy as it sounds it pretty hard work.