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Thread: 1st gear wot acceleration bog?

  1. Default 1st gear wot acceleration bog?

    Been having this minor problem since getting the hp-f tune. During normal launches everything is fine, but from a rolling start or taking of slowly if i mash the peddle the engine seems to bog for a bit and then open up. acceleration slows and the engine sound changes like it's under load. After a second it's fine and keeps accelerating.

    All other gears are no problem just 1st gear.

    DSC is off and steering wheel straight.

    Any thoughts?

  2. #2
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    Not that it matter too much, but it doesn't sound like a 3 in a 3 you won't bother with flat out in 1st gear lol ill have a go tonight in mine but it normally results in wheelspin and axle hop from anything near 1/2 throttle.

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    Quote Originally Posted by Bakis View Post
    Not that it matter too much, but it doesn't sound like a 3 in a 3 you won't bother with flat out in 1st gear lol ill have a go tonight in mine but it normally results in wheelspin and axle hop from anything near 1/2 throttle.
    Mine bogs a little off boost. But I call it, 'The calm before the storm...'

    P.S. I have the HP-F tune too...
    ___,...--'--..--...,,,
    [__--_;=-o-:iiiiiilll.===
    ``/ /-'|___|;;;;;;;;:

  4. #4
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    kccortez has a 3
    but the 2 guys above would know best on how the hp-f tune is............

    But id be mashing 1st gear too if the limiters were removed.......isn't that why it was done

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    Quote Originally Posted by kccortez View Post
    Been having this minor problem since getting the hp-f tune. During normal launches everything is fine, but from a rolling start or taking of slowly if i mash the peddle the engine seems to bog for a bit and then open up. acceleration slows and the engine sound changes like it's under load. After a second it's fine and keeps accelerating.

    All other gears are no problem just 1st gear.

    DSC is off and steering wheel straight.

    Any thoughts?
    Sorry, this might be stating the obvious, (or I'm talking out of school) but if your rolling start, or starting off slow, you'll be doing 1500-2000 rpm. Mash the throttle, well, nothing much will happen until 2500-3000. Torque for me doesn't kick in until 2500. I know you have a tune ( I don't ) but these cars aren known for torque off the line.

    Its why V6's/V8's get the jump on me at the lights if I'm not ready for them. No torque at 1500rpm.
    Redbull is DEAD!!

    Long live the Redbull ... V2



  6. #6
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    Quote Originally Posted by Yeldarb View Post
    Sorry, this might be stating the obvious, (or I'm talking out of school) but if your rolling start, or starting off slow, you'll be doing 1500-2000 rpm. Mash the throttle, well, nothing much will happen until 2500-3000. Torque for me doesn't kick in until 2500. I know you have a tune ( I don't ) but these cars aren known for torque off the line.

    Its why V6's/V8's get the jump on me at the lights if I'm not ready for them. No torque at 1500rpm.
    Sif takeoff under 5000rpm... ever..

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    i remember when stock there was a bog down at low rpm but i've never been gutsy enough to tried with HP-F tune lol.

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    Is this how you bend rods and generally over stress the engine?

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    Poor tuning will bend rods

  10. Default

    It's a 3. Does it even when up at 3000 rpm plus. It feels like the traction control cuts in even when it's off.

    Just got some new dunlop direzza star spec semi's so wheels spin has become much less of an issue.

    Bit embarrassing when you take of the lights and the guy next to you decides to gun it and you plant it, spools, bog and then it hits!

    Maybe it's just something to get used to. On proper launches it is fine.

    5.3 seconds 0- 100 on dashawk.

  11. #11
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    are you sure its not wheelspin?
    Flooring it in 1st or 2nd for me and it just spins up...

    If you have a DH log KR/Boost/Timing/AFR

  12. Default

    Surely revs would rise with wheelspin, seems to just stay at the same rpm for a sec.

    Will try and log when i can.

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    Hmm, maybe shoot HP-F a call or email describing your problem cause sorry to say it sounds odd especially from that high rpm.

    Off topic the dunlop direzza star spec how much and where from?

    Quote Originally Posted by kccortez View Post
    It's a 3. Does it even when up at 3000 rpm plus. It feels like the traction control cuts in even when it's off.

    Just got some new dunlop direzza star spec semi's so wheels spin has become much less of an issue.

    Bit embarrassing when you take of the lights and the guy next to you decides to gun it and you plant it, spools, bog and then it hits!

    Maybe it's just something to get used to. On proper launches it is fine.

    5.3 seconds 0- 100 on dashawk.
    MPSX-treme

    2006 MPS Sports True Red - HP-F Mazedit tune + Other go fast bits - DGR Coilovers + Semi Slicks - Numerous Sure Motorsport Additions - Dashhawk

  14. Default

    Yeah i might contact hp-f.

    $380/tyre from stuckeys. best thing i ever bought for the car.

  15. #15
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    hmmm ok i'll might give them a call (tyre place) thanks for the information

  16. #16

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    or $198 in 235/40/18 from tirerack

    Dunlop Direzza Sport Z1 Star Spec

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    5.3 0-100 and it'd not quick enough??? Stock MPS' are quoted at 6.1

  18. #18

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    I have the same issue - i reckon its tuning related. I have an ecutek tune and i cant get a decent rolling start in 1st...power cuts and then comes back. weird. I dont think its traction control as the tyres dont break traction when im doing a rolling start into 1st and the traction control light doesnt come on either.

  19. #19

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    <friendly jibe>
    Oh you FWD boys make me laugh
    </friendly jibe>

    If you have a dashhawk, you could try recording a few things when you're taking off from first and it might tell us a bit more about what's happening. I'd be looking at :

    • engine load
    • RPM
    • car speed
    • boost
    • fuel pressure

  20. #20
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    Quote Originally Posted by STEALTH_MPS View Post
    or $198 in 235/40/18 from tirerack

    Dunlop Direzza Sport Z1 Star Spec
    Can you order from Tire rack to australia?
    MPSX-treme

    2006 MPS Sports True Red - HP-F Mazedit tune + Other go fast bits - DGR Coilovers + Semi Slicks - Numerous Sure Motorsport Additions - Dashhawk

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