• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Recent content by Sinister Performance

  1. Sinister Performance

    Removing rear O2 sensor on 01-newer PCMs -- Things you should know

    Tuned on an '05 Monte SS L67 the other day. Owner installed a ZZP DP to delete the cat and he also removed the rear O2 (even tho there is a bung in the DP). Anyway he brought it to me for a tune. Went in a disabled the CAT diagnostic code as well as the rear O2 diagnostic codes. Went for a...
  2. Sinister Performance

    Tuning support for 1996 cars now available

    Just wanted to let everybody know I now have custom tuning support for 1996 V6 cars. This is something I have been waiting on for a long time (and I know others have to) and it finally became available. Contact me for more info. -ryan
  3. Sinister Performance

    Wiring Diagrams and Pinouts available for download here

    GM Wiring Diagrams and Pinouts -ryan
  4. Sinister Performance

    General OBD-1 Trouble Code List

    OBD-1 Diagnostic Troube Codes
  5. Sinister Performance

    General OBD-2 Trouble Code (DTC) list

    OBD-2 V6 FWD Diagnostic Troube Codes
  6. Sinister Performance

    Stock L36 + Boost =

    Thought you guys would get a kick out of that picture so I just had to post it. But it does tend to bring up heated debates. I've been to college for this stuff, specifically hi-performance automotive. But beyond that, there's logic; and there's an understanding of what impact the...
  7. Sinister Performance

    LS4 V8 DoD 4T65-E TAPShift info

    I swapped a powertrain out of a 2005 GXP into a Pontiac Fiero. During the swap, I partially disassembled the engine and took some pictures. I posted these pictures to the following webpage along with some information... GM LS4 V8 / 4T65E INFO You can see a write-up of the Fiero swap here...
  8. Sinister Performance

    4T60-E (and HD) ID TAG deciphering info

    4T60-E (and HD) ID TAG deciphering info can be found here: GM FWD Transmission ID charts
  9. Sinister Performance

    4T65-E (and HD) ID TAG deciphering info

    4T65-E (and HD) ID TAG deciphering info can be found here: GM FWD Transmission ID charts -ryan
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