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Thread: NEED ADVICE FOR TUNING a1.6 ASTRA GTC OPC

  
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    NEED ADVICE FOR TUNING a1.6 ASTRA GTC OPC

    Hi guys, im new here and i need your help.
    I own a 2008 3 door Astra GTC with OPC bodykit, 1.6 l, 118 HP engine and i`ve stumbled upon some problems so i need your advice about tuning it:

    1.I`ve alrady removed the stock airbox and airfilter and installed a universal K&N cone racing air filter (for engines up to 1.9l) but i`m not that satisfied with the result.I`m not sure if the engine got more power....even more im afraid that it lost some of the power..I`ve read some posts here that K&N panel filters are more recommended for my car, but i`m not sure.
    So im asking ..which one of the two is best?!

    2.I want to instal the Steinmetz or H&R lowering springs. It should lower the car approx.40 mm.Some mechanics advised me not to do this `cause by doing this im shortening the life of the front axle and the complete suspension system and that the ride would become ANNOYINGLY STIFF AND HARD..as if you are driving a horse chariot ..
    So i`m asking..Is this true?

    3.ECU reprograming. There is a guy who owns a ride like mine who didn`t change the ECU unit.He simply put the car on a lap top and re-programmed it with a special software. He claims he got more than 20-30 HP with this 350 EUR effort.
    So i`m asking...Is this possible at all, and if it is..how safe it is?

    Please help and
    thanx in advance...

    p.s. pics of my ride will be posted after the planned modifications which include some sweet Sparco or Steinmetz interior enhancments too.
    2008 black Astra 1.6 130hp GTC OPC K&N ASSO Remapped

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    nry's Avatar
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    1) Cone filters tend to let more hot air into the engine so they can lose you power. Most on here would more recommend derestricting the existing airbox and fitting a Vectra C intake pipe, alongside a panel filter if you wish

    2) I would guess most or all lowered springs will give you a firmer/harsher ride

    3) A remap on a standard 1.6 16v will maybe see 10bhp max, if you have the air filter mods above, maybe a decent catback exhaust too, then you may be lucky to see 15-20bhp more at a rough guess

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    Quote Originally Posted by stratrovarius View Post

    3.ECU reprograming. There is a guy who owns a ride like mine who didn`t change the ECU unit.He simply put the car on a lap top and re-programmed it with a special software. He claims he got more than 20-30 HP with this 350 EUR effort.
    So i`m asking...Is this possible at all, and if it is..how safe it is?
    .
    cant see it giving you 20-30bhp i would think you would be lucky to see about 8 bhp on a 1.6 engine.

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    Thanx guys..i`m replacing the K&N cone filter with a K&N panel filter today.
    About the Vectra C intake pipe..has anyone already installed it on an Astra GTC ( Mk5)..and are there any results?
    ehmmmm...And what`s a catback exhaust ? (sorry about this..)..I,ve alrady removed my stock exhaust and installed a rumbing sporty ASSO exhaust.
    Is there a (safe) way of changing the ECU unit, or the remapping is the only way?! ....the car is still under warranty and i was informed that the remapping cannot be noticed at regular services.
    Once again, thanx!
    2008 black Astra 1.6 130hp GTC OPC K&N ASSO Remapped

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    smcqis's Avatar
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    the intake pipe will allow more air in an give a smoother rev up the range an release a few more horses
    Astra Sportshatch 1.9 CDTI SRI (150)

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    Quote Originally Posted by smcqis View Post
    the intake pipe will allow more air in an give a smoother rev up the range an release a few more horses

    Yeah but has anybody installed it on a 2008 model?...
    2008 black Astra 1.6 130hp GTC OPC K&N ASSO Remapped

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    MarkyG's Avatar
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    Do you have the z16xer engine? I think you may see some decent power from the remaps as you can change the cam timing adjustment from economy to power (wheras theyre fixed on a standard engine). Would love to see some results!

    M
    Garage clearout! Z18xer, Z16xep, Z22se parts
    http://www.astraownersclub.com/vb/sh...=1#post2258597

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    Yes, it`s a Z16 XER.
    So, can anybody explain how this remapping works?
    How does affect the engine`s durability, fuel ecomony and after all is it worth the effort and the money?
    2008 black Astra 1.6 130hp GTC OPC K&N ASSO Remapped

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    ..And when talking about remapping...what do you think of theese figures?

    http://www.wakeupyourcar.com/getFull...uName=Vauxhall
    2008 black Astra 1.6 130hp GTC OPC K&N ASSO Remapped

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