Results 1 to 6 of 6

Thread: Anyone know what 1kpa is worth at WOT?

  1. #1
    EFILive Reseller ringram's Avatar
    Join Date
    Oct 2005
    Posts
    1,412

    Default Anyone know what 1kpa is worth at WOT?

    Looks like Im droppping from 101kpa at low rpm to around 97kpa at full scream. I have a Fast90 and TB to go on and was wondering what the extra airflow is likely to net me?
    I guess it might relate to the 15-20bhp everyone normally quotes for the Fast90 over the LS6 & TB.
    Thats about 4% more pressure. Is that worth 4% more power? If so then cool!
    Anyone know what they picked up from removing intake restrictions?
    Get EFILive in europe (http://www.efilive.eu).
    2007 Escalade ESV L92 6.2L VVT.
    2014 VF SV LS3 Maloo.

  2. #2
    Lifetime Member
    Join Date
    Sep 2003
    Posts
    688

    Default

    Prolly gain about 10-15 more if you are seeing vacuum in the intake
    EFILive - The Single version of the Truth

    Larry - HumpinSS

  3. #3
    Lifetime Member jfpilla's Avatar
    Join Date
    Apr 2003
    Posts
    666

    Default

    The altitude here is around 1000' asl:
    My car has a Vararam:
    On the dyno with airfilter Map is 96 without filter its 97 and picks up 5HP.
    At the track it's 98-99 with filter. All at 6500rpms.

  4. #4
    Lifetime Member
    Join Date
    Jul 2005
    Posts
    702

    Default

    Airflow is directly proportional to MAP, thus 4% of MAP increase will be 4% Airflow increase. Airflow is proportional to HP, thus HP should also be 4% higher.

    there's a great australian online mag called autospeed that has a fantasic series of articles about MAP drops in the intake:

    http://autospeed.drive.com.au/cms/article.html?&A=0629

    if you need a subscription for it, hit me up on email, it's too good to not read.

  5. #5
    EFILive Reseller ringram's Avatar
    Join Date
    Oct 2005
    Posts
    1,412

    Default

    Thanks dude. I have an archival sub to it, but not a current subscription.
    5bhp per kpa jfpilla, I guess it depends on what engine mods are. But sounds like I should gain 4%.
    Cool.
    Just checked. That article is wide open to read. Looks like you dont need a sub for that one anyway.
    Get EFILive in europe (http://www.efilive.eu).
    2007 Escalade ESV L92 6.2L VVT.
    2014 VF SV LS3 Maloo.

  6. #6
    Lifetime Member
    Join Date
    Jul 2005
    Posts
    702

    Default

    bringing up an old thread...
    we can calculate airflow increase from pressure and temp, but we dont know what it really translates to powerwise. maybe we should have a poll of 'i flow X g/sec and that translates to Y (SAE or STD)hp'. of course dyno calibrations are gonna monkey with the numbers, but at least we'd get a general idea. i've read somewhere that you make about 9-10hp for each lb/min of airflow, but it didn't say if it's wheel or flywheel hp. or should we up the game a bit and start calculating BMEP and such? any ideas ?

Similar Threads

  1. Worth the upgrade?
    By zapp168 in forum FlashScan V2
    Replies: 9
    Last Post: May 14th, 2008, 08:20 AM
  2. Upgrade to 7.5.1 worth it for LS1?
    By RevGTO in forum Gen III V8 Specific
    Replies: 11
    Last Post: October 10th, 2007, 11:57 AM
  3. Is this Motron 60 information worth anything?
    By Redline Motorsports in forum Gen III V8 Specific
    Replies: 10
    Last Post: September 2nd, 2007, 04:31 AM
  4. Tuning a stock engine...Worth it?
    By CGTMS in forum General (Petrol, Gas, Ethanol)
    Replies: 2
    Last Post: December 20th, 2006, 10:21 AM
  5. Is SD worth it without the Custom OS?
    By FstBlkZ28 in forum General (Petrol, Gas, Ethanol)
    Replies: 13
    Last Post: August 6th, 2006, 03:31 PM

Posting Permissions

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