Improving off-boost performance

Discussion in 'Technical' started by Kieren, Jan 12, 2010.

  1. Kieren

    Kieren Active Member

    I do wanna get technical :)
     
  2. Chrispy

    Chrispy Pretentious Upstart

    If you want to go quicker you need a bigger bang.

    To get a bigger bang you need more air or a more efficient burn.

    To get more air you need to either have larger capacity, force more air in (turbo) or artificially insert oxygen (nitrous). Increasing capacity costs a fortune, low RPM boost is a pain and you would need a sequential or a twincharged setup and you don't want Nitrous for obvious reasons.

    If you can't get more air you need it more efficient, i.e. have a larger temperature difference between the intake and combustion. So more timing, higher compression etc. Problem with this is you will be walking a fine line and detonation will be around the corner. You will be OK off boost, but as soon as you try and shove in 15psi with a 11:1 CR you will be in for some fun if you can't keep the charge temps down.

    Saying that I reckon you could make a very quick responsive car with a NA bottom end, turbos and water injection.


    As for all the lightweight pulleys and all that, the gain isn't that large. Bigger gains to be seen by removing the viscous fan IMO. Mine felt a lot quicker when I pulled mine off.



    So yeah, just leave it alone and be happy with it :p
     
    Kieren likes this.
  3. Kieren

    Kieren Active Member

    Brilliant! Well pulling timing and bigger ICs are possible. Perhaps water injection/spray can be my next lengthy project :) I'm not game enough to take out the viscous fan... I still spend half the time watching the temps on my ECUtalk when driving :p
     

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