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Engine How much power do bolt-ons really make?

Discussion in 'Powertrain' started by JLee, 2005年02月10日.

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    JLee TD05 3SGTE

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    JLee, 2005年02月10日
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    dragonhuntur Sunny So.Cal

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    Hmmmmm...higher octane made them lose power. I remember the debate a long time ago where people were saying higher octane fuel would give you better power...guess not.
    dragonhuntur, 2005年02月10日
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    vortex Well-Known Member

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    hehe that is correct - higher octane does jack shit for ya if you're not boosting. one reason why: putting in 91 octane in a car tuned for say.. 85 you're not actually making a nice a/f ratio and burning off the fuel - you're running a little richer and while some people still argue that the richer you're running the more power you're making, it is incorrect. you can get more power from a lower a/f (mind you ya dont wanna run too lean). this is also why people who have run turbocharged applications raved about how much power they were making right before they melted down their block from running too lean. :) for a while there they were making tons of torque, but... yeah... lol
    vortex, 2005年02月10日
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    toyotaspeed90 New Member

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    air fuel ratio and octane actually have nothing to do with one another when comparing different octane ratings

    generally lower octane rating gasses will ignite easier, which is better for a more controllable flame front in the combustion chamber..... the higher you go, the harder it is to ignite....

    detonation is where the gas pre-ignites to ignition spark..... the reason it's recommended to run higher octane in boosted motors or higher compression motors is because with lower octane there is more chance for the gas to ignite itself in hotter combustion situations..... however, you want to find the lowest octane gas that does not detonate
    toyotaspeed90, 2005年02月10日
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    vortex Well-Known Member

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    correct but since the low octane ignites easier you have a better chance of burning off more of the fuel provided. since higher octane is harder to ignite, you will have more unburned fuel which will register on an a/f meter (i tested this theory in watching what the engine did with a wide-band on different octane gases ranging from 75 octane to 108 octane (yes there are pumps here in co that provide it)
    vortex, 2005年02月10日
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    Cuztomrollaz98 MAD VLAD!

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    I dk if I'm right but all that higher octane fuel does is keep ur fuel system clean........correct me if I'm wrong.
    Cuztomrollaz98, 2005年02月10日
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    JLee TD05 3SGTE

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    It prevents/reduces detonation on high compression and boosted engines..on a normal 1zz, it's not worth it.
    JLee, 2005年02月11日
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    polo708 New Member

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    its more resistant to detination and takes longer to burn
    polo708, 2005年02月11日
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    Laz Z Kay "n00B, be kind"

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    The only mod that produces mad hp is Type-R sticker.
    Laz Z Kay, 2005年02月11日
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    Cuztomrollaz98 MAD VLAD!

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    haha there we go with the sticker again lol.......but I've always wondered who was stupid enough to come up with that idea lol...... stickers give u 100 hp haha man what an idiot.....*sighs*
    Cuztomrollaz98, 2005年02月11日
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    e_andree E

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    Just goes to prove that all of that money put into the bolt ons do jack shit for hp ratings.
    e_andree, 2005年02月11日
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    JLee TD05 3SGTE

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    Well, they did help a little.. :p
    JLee, 2005年02月11日
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    JCturbo 9THGEN GURU

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    and remember Manufacturer Claims gains are usually shown as Flywheel increase, or a percentage rating. same part on different cars equals a different gain, I read an artical where a new Accord V6 gained 20hp from Unorthodox lightwight pulleys (including Crank pulley)
    JCturbo, 2005年02月12日
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    Bulletproofswordsman JDM Oroku-Saki

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    damn if u dont do a swap or boost ur gettin nowhere, i hope suspension mods, arent the same thing
    Bulletproofswordsman, 2005年02月12日
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    e_andree E

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    What do you mean suspension mods?

    Suspension mods deal with physics, and are well worth it if you know what youre doing. TUNE your suspension, dont just throw on every available part just because its available.
    e_andree, 2005年02月12日
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    Laz Z Kay "n00B, be kind"

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    I guess I should spend my money on Tein SS Coilover then. :confused: :confused:
    Laz Z Kay, 2005年02月12日
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    black03rollaLE New Member

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    so if i take physics next year, that will help me understand suspension lol? i never did get how any of that works, so i'm not even planning for new suspension.
    black03rollaLE, 2005年02月13日
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    toyotaspeed90 New Member

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    the main "physics" would be stuff dealing with forces, springrates, and weight transfer...

    however, dealing with suspension.... the best mod for good handling is learning to drive your car
    toyotaspeed90, 2005年02月13日
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