Close

Results 1 to 5 of 5
  1. #1
    Join Date
    Feb 2010
    Posts
    295
    Rep Points
    613.0
    Mentioned
    12 Post(s)
    Rep Power
    7


    1 out of 1 members liked this post. Reputation: Yes | No

    Thumbs up HPF Drag M3 - 817rwhp @ 32psi - 1,000rwhp 6 speed equivalent - VIDEO

    We dynoed the drag m3 and made some more power. 817rwhp @ 32psi through the TH400 with the Pro Torque converter. This is equivalent to over 1,000rwhp with a 6 speed. Our drag M3 weighs a mere 2,640 lbs. I love the completely flat powerband. There is no boost or power loss between shifts so it holds over 800rwhp from one end of the track to the other. Click here to enlarge
    Video will be up in a few minutes



    Click here to enlarge
    STAGE 1 M3 TURBO KIT SALE - $13,500!!!!
    Click here to enlarge Click here to enlarge Click here to enlarge
    Click here to enlarge

    HorsepowerFreaks.com
    12905 NE Airport Way
    Portland, OR 97230
    (503) 256-5600
    BMW Performance Parts
    Product questions or to purchase - sales@horsepowerfreaks.com

  2. #2
    Join Date
    Jan 2012
    Location
    Tri-State
    Posts
    594
    Rep Points
    47.5
    Mentioned
    7 Post(s)
    Rep Power
    0


    Reputation: Yes | No
    How come your high comp motor in the HPF Track car makes 778 at 18 lbs of boost? Was expecting higher numbers to be honest

  3. #3
    Join Date
    Jan 2010
    Location
    SoCal
    Posts
    117,096
    Rep Points
    31,291.3
    Mentioned
    2054 Post(s)
    Rep Power
    313


    Reputation: Yes | No
    Click here to enlarge Originally Posted by bmwtek Click here to enlarge
    How come your high comp motor in the HPF Track car makes 778 at 18 lbs of boost? Was expecting higher numbers to be honest
    It's the transmission, it's a super stout GM automatic which saps power.
    Stage 2 or 2.5 E9X M3 S65 V8 supercharger kit for sale: http://www.boostaddict.com/showthrea...r-kit-for-sale

  4. #4
    Join Date
    Feb 2010
    Posts
    295
    Rep Points
    613.0
    Mentioned
    12 Post(s)
    Rep Power
    7



    1 out of 1 members liked this post. Reputation: Yes | No
    Click here to enlarge Originally Posted by bmwtek Click here to enlarge
    How come your high comp motor in the HPF Track car makes 778 at 18 lbs of boost? Was expecting higher numbers to be honest
    Good question.

    Two different types of motors. The high compression track motor is compressing much of the air with higher compression pistons instead of requiring the turbo to compress much of the air. The low compression drag motor is compressing more of the air with the turbo with the added benefit of the intercooler cooling the compressed air charge down. The higher compression motor has quicker turbo spool because the pistons are keeping the cylinder pressures high even off boost, but it makes less peak power. The lower compression motor makes more power because the turbo is more efficient at compressing the air and the intercooler removes 95% of the heat out of the air charge. The HPF Drag M3 has an auto transmission with a high stall torque converter. This skews the dyno results as the transmission can have up to a 30% drive train loss. However, the torque converter multiplies torque. This allows the car to come out of the hole with much more torque than could be generated with a manual transmission. If we simply swapped the auto with a 6 speed manual this car would be well over 1,000rwhp. Click here to enlarge

    Chris.
    STAGE 1 M3 TURBO KIT SALE - $13,500!!!!
    Click here to enlarge Click here to enlarge Click here to enlarge
    Click here to enlarge

    HorsepowerFreaks.com
    12905 NE Airport Way
    Portland, OR 97230
    (503) 256-5600
    BMW Performance Parts
    Product questions or to purchase - sales@horsepowerfreaks.com

  5. #5
    Join Date
    Jan 2012
    Location
    Tri-State
    Posts
    594
    Rep Points
    47.5
    Mentioned
    7 Post(s)
    Rep Power
    0


    Reputation: Yes | No
    Click here to enlarge Originally Posted by HPF Chris Click here to enlarge
    Good question.

    Two different types of motors. The high compression track motor is compressing much of the air with higher compression pistons instead of requiring the turbo to compress much of the air. The low compression drag motor is compressing more of the air with the turbo with the added benefit of the intercooler cooling the compressed air charge down. The higher compression motor has quicker turbo spool because the pistons are keeping the cylinder pressures high even off boost, but it makes less peak power. The lower compression motor makes more power because the turbo is more efficient at compressing the air and the intercooler removes 95% of the heat out of the air charge. The HPF Drag M3 has an auto transmission with a high stall torque converter. This skews the dyno results as the transmission can have up to a 30% drive train loss. However, the torque converter multiplies torque. This allows the car to come out of the hole with much more torque than could be generated with a manual transmission. If we simply swapped the auto with a 6 speed manual this car would be well over 1,000rwhp. Click here to enlarge

    Chris.
    Thanks for the clarification, great work nonetheless.

Tags for this Thread

Bookmarks

Posting Permissions

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