Site Sponsors & Vendors
Page 1 of 2 12 LastLast
Results 1 to 10 of 11

Thread: 2009 G8 GT Drivetrain loss %??

  1. #1
    Junior Member
    Join Date
    May 2009
    Posts
    12
    Post Thanks / Like

    Default 2009 G8 GT Drivetrain loss %??

    I'm just curious. This is the first RD car i've owned in a long time. I know my friends RX8 which was rated at 238 hp, dyno'ed at 171whp at one place and 176whp at another. I was surprised that that much power was lost going to the wheels.

    For the G8 GT what is drivetrain loss %?

  2. #2
    LOST BUT NEVER FORGOTTEN GRRRR8's Avatar
    Join Date
    Aug 2008
    Location
    Sugar Land Texas
    Posts
    15,917
    Post Thanks / Like

    Default

    15-18%
    2008 Liquid Red Pontiac G8 Sport/Premium - Adams Polishes - American Racing Headers - ARP - BMR Fabrication - Circle D Specialties - COMP Cams - Crazy Paul - Dynojet - Earl's - Flowmaster - Fuel Air Spark Technology - G2 - GFORCE 1320 - Greg Weld - HP Tuners - JBA - Lingenfelter - Maverick Man Carbon - Metco Motorsports Solutions - Mickey Thompson - M&H - Mike Norris Motorsports - NGK - Pace Performance - Pedders USA - Powerbond - PSI - Russell - SBX Performance - SJM Manufacturing - SPOHN Performance - Tony Mamo - Vararam - Vector Motorsports - Wretched Motorsports - 470 RWHP 427 TQ - Engine Tune By Patrick G

  3. #3
    Junior Member
    Join Date
    May 2009
    Posts
    12
    Post Thanks / Like

    Default

    Sweet thank you.

  4. #4
    Senior Member
    Join Date
    Apr 2009
    Posts
    167
    Post Thanks / Like

    Default

    i heard 15% for manual and 20% for auto

  5. #5
    Senior Member
    Join Date
    Sep 2008
    Location
    Fredericksburg, VA
    Posts
    139
    Post Thanks / Like

    Default

    Quote Originally Posted by steve b. View Post
    i heard 15% for manual and 20% for auto
    Sounds right.
    2009 G8 GT
    Panther Black Metallic

    577rwhp / 547rwtq

    Magna Charger TVS MP1900
    Custom Blower Cam
    DOD Delete
    2.8 Pulley
    PowerBond 10% Overdrive Crank Pulley
    ZL1 Fuel Pump Kit
    JMS BAP
    FAST 65lb Injectors
    Roto-Fab CAI
    American Racing Longtube Headers
    GXP Axlebacks
    Camaro 3.27 Differential
    CTS-V 19x9/19x9.5 Wheels
    Bridgestone Potenza S-04 Tires - 255/40 - 285/35

  6. #6
    Senior Member
    Join Date
    Sep 2008
    Location
    Fredericksburg, VA
    Posts
    139
    Post Thanks / Like

    Default

    Quote Originally Posted by select20 View Post
    I'm just curious. This is the first RD car i've owned in a long time. I know my friends RX8 which was rated at 238 hp, dyno'ed at 171whp at one place and 176whp at another. I was surprised that that much power was lost going to the wheels.

    For the G8 GT what is drivetrain loss %?
    This was actually quite an uproar in the RX8 community. It was highly believed and obviously proven that Mazda was telling a little tale when it came to the HP rating of the RX8.
    2009 G8 GT
    Panther Black Metallic

    577rwhp / 547rwtq

    Magna Charger TVS MP1900
    Custom Blower Cam
    DOD Delete
    2.8 Pulley
    PowerBond 10% Overdrive Crank Pulley
    ZL1 Fuel Pump Kit
    JMS BAP
    FAST 65lb Injectors
    Roto-Fab CAI
    American Racing Longtube Headers
    GXP Axlebacks
    Camaro 3.27 Differential
    CTS-V 19x9/19x9.5 Wheels
    Bridgestone Potenza S-04 Tires - 255/40 - 285/35

  7. #7
    LOST BUT NEVER FORGOTTEN GRRRR8's Avatar
    Join Date
    Aug 2008
    Location
    Sugar Land Texas
    Posts
    15,917
    Post Thanks / Like

    Default

    15% = 306.85
    18% = 296.02

    Based on the factory rating of 361 hp.
    2008 Liquid Red Pontiac G8 Sport/Premium - Adams Polishes - American Racing Headers - ARP - BMR Fabrication - Circle D Specialties - COMP Cams - Crazy Paul - Dynojet - Earl's - Flowmaster - Fuel Air Spark Technology - G2 - GFORCE 1320 - Greg Weld - HP Tuners - JBA - Lingenfelter - Maverick Man Carbon - Metco Motorsports Solutions - Mickey Thompson - M&H - Mike Norris Motorsports - NGK - Pace Performance - Pedders USA - Powerbond - PSI - Russell - SBX Performance - SJM Manufacturing - SPOHN Performance - Tony Mamo - Vararam - Vector Motorsports - Wretched Motorsports - 470 RWHP 427 TQ - Engine Tune By Patrick G

  8. #8
    Beyond Help r33pwrd's Avatar
    Join Date
    Dec 2008
    Location
    WA
    Posts
    2,887
    Post Thanks / Like

    Default

    Stock (assuming I was truly 361 hp) I saw about 18.5% loss. So with little bolt on mods im close to 415 at the crank !
    2009 G8

  9. #9
    Senior Member Featherburner's Avatar
    Join Date
    Aug 2008
    Location
    NJ
    Posts
    403
    Post Thanks / Like

    Default

    Mine was 17% stock.
    John
    2009 Stryker Blue Metalic GT
    1993 Pontiac Formula FIREHAWK 385ci., M6, Strange S60.
    1968 Firebird Formula Convertible *Restomod project*

  10. #10
    VIP Member Blackdevil77's Avatar
    Join Date
    Aug 2008
    Location
    Long Island, New York
    Posts
    2,623
    Post Thanks / Like

    Default

    mine dynoed at 291 stock on a mustang. That either means my car wasn't really 361 crank, the % loss was greater on my car, or the dyno wasn't being very generous
    Custom Dyno Tune By Brian at Kaltech Tuning and Performance
    [/FONT][/B]
    Vararam Cold-Air Intake
    1 7/8 Long tube American Racing Headers
    Custom Cam from Comp Cams
    CNC Valve Job from Livernois
    VMS HSRK
    160 T-Stat
    2800 Circle-D Stall Converter
    435rwhp 385rwtq Mustang Dyno
    Coming Soon:Some Tires Bitch!

    *SOLD


    NEW CAR

    2014 Shelby GT500

    *STOCK*
    http://i278.photobucket.com/albums/k...ps9cf68c12.jpg

Posting Permissions

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