What does my dyno run show me?

  1. Saxperience Forum Bum Joined: Jan 2009 Soton - Hedge End Posts: 3143 TT 225, Charged Eunos
    #1
    Been told different things by a few different people and just wondered...

    This a totaly standard VTS (52 Plate)

    The torque seems to drop off at 5k ish where as far as i know it should still be pulling? Been told injectors maybe?

    Just wondered if there is anything else you can see from the graph that might need sorting out

  2. Established Member Joined: Dec 2009 Essex Posts: 1006
    #2
    Thats not a bad graph at all, torque curve could be flatter but thats only if your being picky. Torque starts dropping off where you'd expect. Do you have an afr graph?
  3. Saxperience Forum Bum Joined: Jan 2009 Soton - Hedge End Posts: 3143 TT 225, Charged Eunos
    #3
    Nah this was only one we got on the day.
  4. Established Member Joined: Dec 2009 Essex Posts: 1006
    #4
    Next time you have you car RR'd get an afr as these are more useful.
  5. Saxperience Forum Bum Joined: Jan 2009 Soton - Hedge End Posts: 3143 TT 225, Charged Eunos
    #5
    Will do

    What does afr stand for?

    Air fuel ratio nvm lol.
  6. Saxperience Post Whore Joined: Jun 2006 Ramsey st marys, peterborough Posts: 8288 Saxo's, Corsa (Daily)
    #6
    yer that is very inportant information to have as we could tell you if the fuel is correct.
  7. Infrequent Poster Joined: Apr 2010 Posts: 121
    #7
    Looks spot on. Nothing to be worried about.

    If you do change anything and want to see how much power you've gained always go to the same place. You can have slightly different read-outs from different places simply down to slight differences in calibration.
  8. Frequent Poster Joined: Jul 2007 Posts: 810 2001 VTS
    #8
    Looks fine bud! These measurements @ the fly yeah?

    Nice to see some honest and realistic results for a change
  9. Regular Poster Joined: Jan 2008 Hampshire Posts: 324 Wicked Red Vtr.
    #9
    i've heard to get best results on a RR is to give your car a bloody good servicing first. apparently you could see up to 5 bhp difference.
  10. Infrequent Poster Joined: Mar 2010 Rotherham/Sheffield Posts: 137 Ford Focus Zetec
    #10
    Quote:
    Originally Posted by mischief View Post
    i've heard to get best results on a RR is to give your car a bloody good servicing first. apparently you could see up to 5 bhp difference.
    it'd make sense because if you've got all shit and that in the oil and its going on the engine to lubricate it its not going to be say easier then when its brand new will it? plus when its all cleaned out properly everything runs better, don't know about it being 5 bhp though
  11. Saxperience Post Whore Joined: May 2009 Chelmsford Posts: 8662 8 Valve 'R.
    #11
    Quote:
    Originally Posted by blakey260 View Post
    it'd make sense because if you've got all shit and that in the oil and its going on the engine to lubricate it its not going to be say easier then when its brand new will it? plus when its all cleaned out properly everything runs better, don't know about it being 5 bhp though
    Well, you're not gaining 5bhp, you're just restoring it/claiming it back from the engine, e.g. it's low on power, and you're just cleaning it out, increasing bhp (if it needs it of course).
  12. Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can
    #12
    That's pretty much a textbook RR graph for a standard TU5J4 engine.
  13. Saxperience Forum Bum Joined: Dec 2008 Pontefract Posts: 4007 2010 E92 320i MSport
    #13
    Quote:
    Originally Posted by Toad View Post
    That's pretty much a textbook RR graph for a standard TU5J4 engine.
    Theres two things there that are bugging me though.

    Book says peak power is at 6600rpm, that graph is at about 6250-6500, seems to die off a tad early.
    And secondly, does that rev limit not seem a bit high for standard?
  14. Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can
    #14
    Quote:
    Originally Posted by JoshB View Post
    Theres two things there that are bugging me though.

    Book says peak power is at 6600rpm, that graph is at about 6250-6500, seems to die off a tad early.
    And secondly, does that rev limit not seem a bit high for standard?
    That's a good point about the rev limit. It's likely that they didn't take the RPM readings from the ECU, as it was most likely a RR day, and wouldn't have time. Therefore, the RPM shown could be quite off.

    As far as the shape goes, it looks pretty good to me. But the confusing RPM could make the actual power results rather inaccurate.
  15. Frequent Poster Joined: Oct 2005 Posts: 751
    #15
    the fact that the power/torque lines cross at 5252rpm is a good indicator that the rpm for the dyno run was taken from the ecu.
  16. Saxperience Post Whore Joined: Mar 2007 Reading Posts: 8980 French tin can
    #16
    Quote:
    Originally Posted by yr51ocw View Post
    the fact that the power/torque lines cross at 5252rpm is a good indicator that the rpm for the dyno run was taken from the ecu.
    I have 2 RR plots from NMS, one which was taken from my ECU and the other one taken from the tacho / speedo. Both cross plots have the torqu and BHP lines crossing at the correct RPM, yet the later dyno plot is shifted about 300rpm further to the right, giving slightly higher torque reading.
  17. Frequent Poster Joined: Oct 2005 Posts: 751
    #17
    to get them to cross at 5252rpm by taking it from the tacho/speedo you must have very accurate dials, and be able to hold the car at a steady position to be able to read. Something I have never been able to do on the dyno
  18. Saxperience Forum Bum Joined: Jan 2009 Soton - Hedge End Posts: 3143 TT 225, Charged Eunos
    #18
    I doubt the rev limiter has been raised atall

    It was done on a rr day with all saxos there.

    I think the dyno was a decent set up seeming as it was done at ktec.

    Will be interesting to get another reading soon.

    Thanks for all the replys.