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  1. #1
    2006 RXP
    Join Date
    Jun 2007
    Location
    Baltimore MD
    Posts
    59

    When should i change to a 15/20??

    right now i have a greenwheel and a 14/19.

    I have a 4" air intake waiting for install, a worx grate on the way(and girdle and pump shoe insert).

    I plan on getting a shorty waterbox and either a riva gen2 or Fizzle IC, along with the RE or fiberglass block offs.

    But, when should i change over to a 15/20? should i just wait until im boucing off the rev limiter? should i think about getting a new ECU and injectors? actually let me rephrase that. i WANT to get a new ECU and injectors, but when should i introduce these two mods?


  2. #2
    Vern's Avatar
    Join Date
    May 2005
    Location
    Grand Haven, MI
    Posts
    3,594
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    128
    I ran a 15/20 with stock SC, stock ECU, so IMO put it on once you have 4" intake and good intercooler (but NOT before). I ran 7900 rpms (a little low) and 75 mph on GPS. I later added a better SC wheel and more boost and ran 8100 rpm and 77 mph. When I added Riva ECU later, the same wheel (with a few minor tweaks) still worked great.

  3. #3
    2006 RXP
    Join Date
    Jun 2007
    Location
    Baltimore MD
    Posts
    59
    Quote Originally Posted by Vern View Post
    I ran a 15/20 with stock SC, stock ECU, so IMO put it on once you have 4" intake and good intercooler (but NOT before). I ran 7900 rpms (a little low) and 75 mph on GPS. I later added a better SC wheel and more boost and ran 8100 rpm and 77 mph. When I added Riva ECU later, the same wheel (with a few minor tweaks) still worked great.
    so i shouldnt install the intake without getting the 15/20, considering that i already have a greenwheel?

  4. #4
    Moderator Snoman's Avatar
    Join Date
    Apr 2006
    Location
    South Chicagoland
    Posts
    14,688
    +1
    846
    You can..But it will be a little skuggish on acceleration..

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