Autech Pulsar GTi

Discussion in 'Members Rides' started by Dale, Sep 18, 2009.

  1. Dale

    Dale Moderator Staff Member

    Messages:
    4,297
    Likes Received:
    252
    Location:
    West Midlands
    Model:
    Autech GTi
    Chassis:
    N15
    The fuelling was setup on this MAHA rolling road, using steady state mode at different RPM intervals. We held the motor at 7400 to get a good reading, it was a little rich but not enough to cause a missfire etc.

    Yeah the N1 cams can make power upto 8-8.5k.

    Well id consider this dyno as reading low, when you consider a bone stock SR20VE is 190bhp.
    This 211bhp should be more like 211WHP for this setup but Im not too concerned about the numbers, im happy with the torque curve and theres a little bit more power to be found to 8000rpm if i can sort out the issues.

    Im almost tempted to put the regular 16ve cams back in.

    Has anybody got adjustable cam gears for sale?
     
    Last edited: Sep 6, 2014
  2. Spook

    Spook

    Messages:
    4,186
    Likes Received:
    996
    Is it definitely det and not valve bounce/float? What springs are you running?
     
  3. Sam

    Sam Moderator Staff Member

    Messages:
    20,122
    Likes Received:
    5,171
    Location:
    South West
    Model:
    VZR N1
    Chassis:
    N15
    The inlet cam was retarded loads on the stroker when i first got it because the compression was so high.
     
    Dale likes this.
  4. Dale

    Dale Moderator Staff Member

    Messages:
    4,297
    Likes Received:
    252
    Location:
    West Midlands
    Model:
    Autech GTi
    Chassis:
    N15
    They are SR16VE Springs, proven to at least 8500 so it shouldnt be float.

    The noise is audible from 5k and gets worse upto 8k.
     
  5. damienga15de

    damienga15de

    Messages:
    4,603
    Likes Received:
    1,613
    Location:
    westmeath ireland
    Model:
    VZR N-1
    Chassis:
    n15
    Are you going on us power figures?

    There totally exaggerated

    Sent from my GT-I9505 using Tapatalk
     
  6. lucinovzr

    lucinovzr

    Messages:
    762
    Likes Received:
    140
    Location:
    Dublin eire
    Model:
    n1 vzr ,almera gti+t
    Chassis:
    n15
    There's some adjustable cam gears for sale on the inoc facebook group.
     
  7. Dale

    Dale Moderator Staff Member

    Messages:
    4,297
    Likes Received:
    252
    Location:
    West Midlands
    Model:
    Autech GTi
    Chassis:
    N15
    For comparison sake, i would refer to dynojet numbers, which gives the most consistent/comparable results.
    I would need to put my car on a dynojet to be able to compare.
     
  8. n15...

    n15...

    Messages:
    896
    Likes Received:
    73
    Location:
    ire
    Model:
    vzr
    Chassis:
    n15
    Can I say this is near textbook what happened when mine hit the RR? Same HP figure near enough an all. The compression is a ball ache it's just too much I think unless race fuel is used?

    I don't know if cam gears are the answer a lot with these builds found 0, 0 to be best? Or at least adjusting them to not yield so much?
     
  9. mera red gti

    mera red gti

    Messages:
    7,212
    Likes Received:
    426
    Location:
    @ Shell
    Model:
    GTI
    Chassis:
    1999
    ^ they'll be needed to bleed of some cylinder comp.

    what did the afr look like?
    what's the afpr set too?
    what management you using?
    surely your drivetrain isn't loosing 40hp+?
    dd
     
  10. Dale

    Dale Moderator Staff Member

    Messages:
    4,297
    Likes Received:
    252
    Location:
    West Midlands
    Model:
    Autech GTi
    Chassis:
    N15
    N15, i think the compression is too high, its only become an issue after fitting N1s which suggests ive achieved better cylinder filling, there isnt det on the low cam. I just need to find ways to work around it (cam timing) before i consider changing pistons etc.

    David, i cant put a number on the AFR, as the fuelling is monitored with a gas analyser. That reads Lambda, CO and HC. Operator had a target CO of between 5.5-6.5%.

    Fuel pressure is 4 BAR on 370cc injectors using Sr16ve ecu and dastek unichip.

    Im pretty much ignoring the WHP numbers.
     
  11. shaggy_master

    shaggy_master brapp brapp!

    Messages:
    11,586
    Likes Received:
    1,881
    Location:
    Midlands
    Model:
    SRi
    Chassis:
    N15
    Annoying Dale!
     
  12. rowdy-GTi

    rowdy-GTi Moderator Staff Member

    Messages:
    9,954
    Likes Received:
    1,558
    Location:
    Lichfield Staffs
    Model:
    GTi
    Chassis:
    N15
    The BTCC engine must have run similar compression. Did they run race fuel?
     
  13. mera red gti

    mera red gti

    Messages:
    7,212
    Likes Received:
    426
    Location:
    @ Shell
    Model:
    GTI
    Chassis:
    1999
    yet bhp is a derivative of whp, not the other way round as you know. with such a stunning build, this warrants better management i feel.

    like you say these whp and bhp aren't the issue *as a dynojet is a much better gauge, its the issue of det that you'll address shortly im sure.
     
  14. Sam

    Sam Moderator Staff Member

    Messages:
    20,122
    Likes Received:
    5,171
    Location:
    South West
    Model:
    VZR N1
    Chassis:
    N15
    You need a better ECU dude
     
    jagy likes this.
  15. sss4me

    sss4me

    Messages:
    223
    Likes Received:
    66
    Location:
    kangaroo land
    Model:
    sss
    Chassis:
    n15
    this man speaks the truth. alot of ppl at 12-13 to 1 with no detonation dramas. probs a million more hp available too.
     
  16. Spook

    Spook

    Messages:
    4,186
    Likes Received:
    996
    As above. I think you're lacking the fine tuning that is required with a good spec high comp build like yours. The time and money you've spent more than warrants Nistune/Nismotronic or even standalone.
    As for the BTCC cars, I'm pretty sure that there were restrictions on the octane of the fuel they used. Either that or compression ratio I can't remember now.
    Personally, although my spec won't be as far reaching as yours, I am going for a coil-on-plug setup with Nistune. I think that will give the most scope for tuning and better overall product at the end. Just my 2p.
     
  17. sri_alan

    sri_alan

    Messages:
    6,273
    Likes Received:
    687
    Location:
    Aberdeen
    Model:
    GTi
    Chassis:
    N15
  18. Raceworx

    Raceworx

    Messages:
    6,295
    Likes Received:
    2,105
    Location:
    Sheffield
    Model:
    GTi
    Chassis:
    N15
    what's it being mapped with?
     
  19. mera red gti

    mera red gti

    Messages:
    7,212
    Likes Received:
    426
    Location:
    @ Shell
    Model:
    GTI
    Chassis:
    1999
    i think the air is getting that warm on entry that.................


    kidding
     
  20. Dale

    Dale Moderator Staff Member

    Messages:
    4,297
    Likes Received:
    252
    Location:
    West Midlands
    Model:
    Autech GTi
    Chassis:
    N15
    Found the problem. Intake cam was found to be advanced one tooth.

    OOPS.
     
    rowdy-GTi, Spook, chunky and 6 others like this.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice