Page 1 of 3 123 LastLast
Results 1 to 10 of 25

Thread: Harrop Hurricane intake troubles

  1. #1
    Junior Member
    Join Date
    Jun 2007
    Posts
    15

    Default Harrop Hurricane intake troubles

    Hi guys,
    it is more than 10 years that I read with great interest this forum.... and allways I have found solutions to my problems only using the magic button... "SEARCH".

    But there is always the first time for everything.....

    I customer have a C5 Corvette with 383 rotating assembly, Edelbrock heads and unknow camshaft...... with Harrop Hurricane ITB intake.
    The car wasn't running because the drive by wire was always in error.

    Now, after some research, I have found (and solved) a problem with TPS mounting tab and spring loaded leverism. The car idles, run and drive nearly well..... at least to start to do some serious datalogging to tune the engine.

    The big problem is that after few minutes of driving the engine go in limp mode with C1278 and P1514 erros.

    My feeling is that the problem is coming from ABS because you can keep revving the engine in the garage for the whole afternoon.

    Any suggestion ?
    Anyone with Harrop ITB installed with succes ?

    Thanks a lot from an Italian guy
    Pier Paolo

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    27,752

    Default

    In the Engine Diagnostics section of the tune file, look at the various sanity tables... you will have to modify the tables that deal with ETC.

    Have your FlashScan plugged in to your PC/laptop when you open the tune file.

  3. #3
    Junior Member
    Join Date
    Jun 2007
    Posts
    15

    Default

    I know these tables,

    C6101 is maxed out at 4'095,9

    C6102 is maxed out at 4'000

    But seems not working as expected

    May I change in the TPS tables C3906 or C3907 ???

  4. #4
    Lifetime Member ProperTuningOG's Avatar
    Join Date
    Dec 2014
    Posts
    218

    Default

    Any ITB setup I would highly recommend going to Alpha N for 3/4s of the fueling control. ITB will have almost full atmospheric pressure at the slightest throttle crack. This will make your normal VE table almost a 2d table. I'll attach the tune for one of the latest ones I have done.

    Click image for larger version. 

Name:	ITB.jpg 
Views:	23 
Size:	256.9 KB 
ID:	22911

    BGableNew OS AN 008 closed.ctz

  5. #5
    Junior Member
    Join Date
    Jun 2007
    Posts
    15

    Default

    Thanks for the inpput..... but this will be next step.

    Now my problem is to avoid limp mode, even cruising around the block at very low speed.

    Please help me...

  6. #6
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    644

    Default

    Make sure that the throttle blades are not sticking.

  7. #7
    Junior Member
    Join Date
    Jun 2007
    Posts
    15

    Default

    Thanks for suggestion...
    After long process of alignment and tuning the blades are moving smoothly.....

    When I have the limp mode I have these errors:

    C1278 and P1514

    Then if I reset the erros and maybe I can drive for 40 minutes with no problems..... or again limp mode in 5 minutes.... I'm losing my head !!

  8. #8
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    644

    Default

    Quote Originally Posted by Stroker-427 View Post
    Then if I reset the erros and maybe I can drive for 40 minutes with no problems..... or again limp mode in 5 minutes.... I'm losing my head !!
    I agree with joecar... it's tripping out on one of your sanity tables.

    Can you post your tune file and a log with it going into limp mode?

  9. #9
    Junior Member
    Join Date
    Jun 2007
    Posts
    15

    Default

    I can post the tune actually in the car..... I don't know from where is coming !

    I only rised values of C6101 and C6102

    Hope I'm doing well with the attachment....

    Thanks for the help


    C5-Harrop.ctz

  10. #10
    Lifetime Member
    Join Date
    Aug 2013
    Posts
    644

    Default

    Without a log of it going into limp mode, I'm just guessing... but try this adjusted tune file.
    Attached Files Attached Files

Page 1 of 3 123 LastLast

Similar Threads

  1. Harrop Hurricane MAF vs Speed Density
    By RD in SD in forum E37, E38 & E67 PFI ECM's
    Replies: 11
    Last Post: April 27th, 2013, 03:45 AM
  2. Harrop Hurricane 8 Throttle intake with E40
    By rally1 in forum Gen IV V8 Specific
    Replies: 7
    Last Post: April 26th, 2012, 06:16 AM
  3. L5 harrop supercharger goes lean???
    By miguelc in forum IL6,IL5,IL4 Atlas Engines - P12 PCM
    Replies: 1
    Last Post: August 11th, 2011, 01:26 PM
  4. Having troubles....
    By dmaxlover in forum FlashScan V1
    Replies: 6
    Last Post: December 25th, 2008, 05:52 PM
  5. Hurricane Katrina
    By Blacky in forum Purchase and Shipping
    Replies: 0
    Last Post: September 8th, 2005, 11:49 AM

Posting Permissions

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