Important! : No top end power?!?

  1. Established Member Joined: Apr 2008 Isle of Wight Posts: 1971 BMW E30
    #1
    right, basically accellerating up through the gears flat out coming to the top end of fourth and the car just stops responding, almost as if someone has stuck it into neutral. Then after 10-30 seconds after you have slowed down its back to normal... im cunfused lol.
    Anyone have any idea on what this could be? its been seeping a bit of oil lately but wasnt sure if the two were related?

    thanks in advance
  2. Established Member Joined: Oct 2009 West Mids Posts: 1847 Peugeot 106 1.1
    #2
    May be a fuel filter blockage or..

    It may just be becuase it has to fight a lot of wind resistance at that mph, so stops accelerating as much but im not sure.
  3. Established Member Joined: Apr 2010 Posts: 1016
    #3
    Your car probably dosent have enough power to defeat the wind resistance.
  4. L-plater Joined: Mar 2010 Posts: 81
    #4
    What Saxo cannot redline 4th? apart from 1.1 or 1.4.

    Injectors and resistance? Stem Seals leaking, compressing oil/fuel, HT leads and resistance against firing.

    Lots of things it could be, where are you seaping oil from, how much and how long?
  5. Established Member Joined: Apr 2008 Isle of Wight Posts: 1971 BMW E30
    #5
    Quote:
    Originally Posted by Meto View Post
    May be a fuel filter blockage or..

    It may just be becuase it has to fight a lot of wind resistance at that mph, so stops accelerating as much but im not sure.
    ok didnt think of fuel, not going to be wind resistance though...

    Quote:
    Originally Posted by Kyza View Post
    Your car probably dosent have enough power to defeat the wind resistance.
    yeah. HAHAHA

    Quote:
    Originally Posted by elysiumVR View Post
    What Saxo cannot redline 4th? apart from 1.1 or 1.4.

    Injectors and resistance? Stem Seals leaking, compressing oil/fuel, HT leads and resistance against firing.

    Lots of things it could be, where are you seaping oil from, how much and how long?
    stem seals have recently been replaced, i was thinking some sort of compresssion because a lack of fuel would make it splutter?
    also coilpack would also make it missfire wouldnt it?

    seeping oil from top end, either cams seals or slightly lower, a fair amount tbh seems to only seep while driving and is worse the harder i drive it...

    thanks for the help
  6. L-plater Joined: Mar 2010 Posts: 81
    #6
    Quote:
    Originally Posted by iw_laurence View Post
    ok didnt think of fuel, not going to be wind resistance though...

    yeah. HAHAHA



    stem seals have recently been replaced, i was thinking some sort of compresssion because a lack of fuel would make it splutter?
    also coilpack would also make it missfire wouldnt it?

    seeping oil from top end, either cams seals or slightly lower, a fair amount tbh seems to only seep while driving and is worse the harder i drive it...

    thanks for the help
    Well could be the coil-pack, might had a stutter under 2,OOORPM, it lacked power, once resistance disappeared the power all came back.

    Perhaps use a thicker oil, the fact its leaking when driving and the oil heats making it alot thinner to escape.

    But, no idea, one of those silly issues that's hard to diagnose, and when you do find out what it is, you think to yourself "Oh why didn't I think about that"

    BTW: Do a compression test, and then a wet compression test, need to-do both to find out what's wrong. Wet compression test should check if your rings are gone, but you'd have noticed that
  7. Established Member Joined: Apr 2010 Posts: 1016
    #7
    Well what speed is at the top end of your 4th gear?

    When i had my VTR it would stuggle to go anywhere further than 110mph. I didnt bother me as I dont drive at them speed all the time, so therefore wasnt concerned.
  8. L-plater Joined: Mar 2010 Posts: 81
    #8
    Calculation results:

    Tyre width (mm): 185
    Aspect Ratio: 55
    Wheel Diameter (Inches): 14
    Gear: 4
    Gearbox: 1587-8v
    Engine Speed (RPM): 6500

    Calculated Road Speed = 177.3KPH / 110.1MPH


    195's @ 112MPH, take into account Wind Resistance as well.
  9. Established Member Joined: Apr 2010 Posts: 1016
    #9
    I would put it all down to wind resistance. I wasnt joking when I said it before. Get a different gearbox on there and it will go further more easily but still wont be amazing. As ive said though, do you really need any more speed than 90mph?
  10. L-plater Joined: Mar 2010 Posts: 81
    #10
    Quote:
    Originally Posted by Kyza View Post
    I would put it all down to wind resistance. I wasnt joking when I said it before. Get a different gearbox on there and it will go further more easily but still wont be amazing. As ive said though, do you really need any more speed than 90mph?
    Top end doesn't apply to redline, he's talking more 4-6.5k RPM where the issues are happening, probably only doing 70-85. Hence not wind-resistance, I doubt the OP is a total knob, seems to know exactly what he's doing.
  11. Saxperience Post Whore Joined: Oct 2009 Newcastle, Ashington Posts: 5086 Cammed and VTR'd Furio. Corsa c - Slammed & Euro
    #11
    i have a 1.4 and i can redline that..
  12. Established Member Joined: Apr 2010 Posts: 1016
    #12
    Quote:
    Originally Posted by elysiumVR View Post
    What Saxo cannot redline 4th? apart from 1.1 or 1.4.
    Quote:
    Originally Posted by elysiumVR View Post
    Top end doesn't apply to redline
    Was just elaborating from this post pal. I agree with you if your talking around 70-90mph.
  13. Established Member Joined: Apr 2008 Isle of Wight Posts: 1971 BMW E30
    #13
    Quote:
    Originally Posted by elysiumVR View Post
    Well could be the coil-pack, might had a stutter under 2,OOORPM, it lacked power, once resistance disappeared the power all came back.

    Perhaps use a thicker oil, the fact its leaking when driving and the oil heats making it alot thinner to escape.

    But, no idea, one of those silly issues that's hard to diagnose, and when you do find out what it is, you think to yourself "Oh why didn't I think about that"

    BTW: Do a compression test, and then a wet compression test, need to-do both to find out what's wrong. Wet compression test should check if your rings are gone, but you'd have noticed that
    getting all checked out next week

    Quote:
    Originally Posted by Kyza View Post
    Well what speed is at the top end of your 4th gear?

    When i had my VTR it would stuggle to go anywhere further than 110mph. I didnt bother me as I dont drive at them speed all the time, so therefore wasnt concerned.
    its got a 16v engine with a 1400xsi box. it gets up to 100 easy enough...

    Quote:
    Originally Posted by elysiumVR View Post
    Calculation results:

    Tyre width (mm): 185
    Aspect Ratio: 55
    Wheel Diameter (Inches): 14
    Gear: 4
    Gearbox: 1587-8v
    Engine Speed (RPM): 6500

    Calculated Road Speed = 177.3KPH / 110.1MPH


    195's @ 112MPH, take into account Wind Resistance as well.
    I've changed almost all those specs lol

    Quote:
    Originally Posted by Kyza View Post
    I would put it all down to wind resistance. I wasnt joking when I said it before. Get a different gearbox on there and it will go further more easily but still wont be amazing. As ive said though, do you really need any more speed than 90mph?
    1400xsi box is good enough isnt it? 2nd shortest gear ratios out of all the boxs. 90+mph is usefull on track

    Quote:
    Originally Posted by elysiumVR View Post
    Top end doesn't apply to redline, he's talking more 4-6.5k RPM where the issues are happening, probably only doing 70-85. Hence not wind-resistance, I doubt the OP is a total knob, seems to know exactly what he's doing.
    lol im no noob. will keep you updated on the soloution if i find it out

    Quote:
    Originally Posted by Furio-92 View Post
    i have a 1.4 and i can redline that..