User Tag List

Results 1 to 4 of 4

Thread: SST Boost Spikes

  1. #1
    Junior Member
    Join Date
    Oct 2018
    Posts
    3
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    SST Boost Spikes

    At mid-to-wide-open throttle I'm seeing subtle boost spikes (2-3psi). I'm currently running 28psi nearly to redline on e85. I have adjusted the SST timing table to remove a couple degrees from load >200 during shifts. Should I be holding timing steady (or even adding timing)? Also, I was wondering whether anyone has experimented with other shift strategies, specifically:
    - pushing Lower Bound Fueling to min, effectively generating a fuel cut situation during shifts.
    - somehow closing the throttle to force the bypass valve to open and vent some of that excess air

    Thanks for your input, in advance!

  2. #2
    Senior Member
    Join Date
    Aug 2015
    Posts
    1,129
    Mentioned
    36 Post(s)
    Tagged
    0 Thread(s)
    Can't remember if spark cut is a thing without being patched in.... But i know kozmic did my tune to ADD fuel in between shifts to help keep things cool. Its essentially doing a small squirt of fuel that isn't burned but pushed out the exhaust. Keeps cyl temps in check while also allowing me to spit flames on track during shifts. Super necessary
    Quote Originally Posted by Erik@MIL.SPEC View Post
    Technically speaking, modding cars is a "waste of money." But here we all are. On a car forum. Modifying our cars
    Racing cars makes a heroin addiction look like a vague craving for something salty.

  3. #3
    Junior Member gazgrp's Avatar
    Join Date
    Jun 2019
    Location
    rotherham
    Posts
    1
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    following !

    tuning a car in the uk atm with 2 psi above target on shifts


    spoken to a few tuners trying to find ideas

  4. #4
    Member
    Join Date
    Aug 2016
    Posts
    58
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by gazgrp View Post
    following !

    tuning a car in the uk atm with 2 psi above target on shifts


    spoken to a few tuners trying to find ideas
    Look into the rax patch, I believe he had something to help compensate for the boost spikes on shifts
    1990 Honda CRX and a 2009 GTR making 15X the CRX

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •