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Upgrading My wira aeroback 1.3 engine

Discussion in 'Proton' started by AIRA, Jan 27, 2012.

  1. AIRA

    AIRA 5 Year | Silver

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    Hello forumers, my name's Aira and i owned a Wira Aeroback 1.3 Injection year 2002. I don't think of selling this car because this is the car i grew up with and recently i bought it from my dad (3k only, lucky me haha) who's upgrading to myvi 1.5 SE.

    But 1.3 engine is really underpowered, especially if going up the hills. So i'm thinking of upgrading the engine to 1.6 wira engine, or should i opted for 4g91 mitsu engine? wira 1.6 engine is cheaper, and with my ciput budget i think i can afford it but then all my friends said the 4g91 engine is better and more fuel efficient. So what do you guys thinks? I'm not a racer, just for a daily using only, or is there another engine you guys would suggest? I'm all ears. Thanks
     
  2. fct

    fct Senior Member
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    Big bang for small buck would be a 1.5 4g15 block and top overhaul and some porting job.if swap engine,just look for turbo engine then no regret.
     
  3. duhill

    duhill Senior Member
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    I vote 4G91 or alternate 4g93 NA. One of my friend's 96 Wira Aeroback auto gearbox spoil and he upgraded to 4G91 for few years until now no regret. He bought the half cut for RM4000, only use the engine and some important parts then other things like bumper, headlights, car hood, disc brake, original air-cond and many things he sell off for RM1000+ to take back some money.

    If you want more power turbo is good, but bear in mind that petrol is good also.... When the turbo boost one time is few cents :driver:

    see this 4G93 4g93 na - YouTube
     
  4. Izso

    Izso Boooooossst
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    1.3 can upgrade until 4G93 meh? Legally cannot la.
     
  5. DanzEterna

    DanzEterna Moderator
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    i suggest go for 4g91 1.5 dohc...but now quite expensive....
     
  6. AIRA

    AIRA 5 Year | Silver

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    forgot to mention that my wira is manual transmission

    so how much do u think it cost to upgrade to 4g91? and i've seen 4g92 single cam is cheaper than the twin cam version. what is the difference between this two engine?
     
  7. tofu_manic

    tofu_manic Senior Member
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    upgrade to a 4g15 block, simple and biggest bang for ur buck mod u can do
     
  8. EvolutionZ

    EvolutionZ Moderator
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    4g91 dohc for sure....
     
  9. croydon

    croydon Senior Member
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  10. AIRA

    AIRA 5 Year | Silver

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    @croydon, i'm a noob in turbo system so can u tell me what's the difference in changing to turbo and change the engine?
    And is turbo cost high in maintenance? FC?
     
  11. duhill

    duhill Senior Member
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    my bad, forget that AIRA wants a legal ride so 4G93 is out.
    4G91 DOHC best for you... Buy a half-cut and sell off those parts you no need. You can also sell of your original dashboard if you replaced it with Mitsu...

    Turbo the boost sound is very nice but fuel consumption definitely high. See the boost meter go up and down very syiok btw..
     
  12. steven7810

    steven7810 mivec user
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    Hello. Bro... I go for 4G91 1.5 DOHC or 4G92 MIVEC....
    Mivec now are to expensive...
    I do my convert last 7 years Mivec manual cost me RM4500.00 now days are RM10,000.00
    only half cut not include parts,labour and inspection cost...
    Total RM7k for me last 7years..
    I driving Proton Iswara Sedan...
     
  13. AIRA

    AIRA 5 Year | Silver

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    yeah mivec is way pricey nowadays

    I'm thinking upgrading to engine wira 1.6, total cost plus installation below 3k. Is it a good choice guys?

    Or if i change the block of my engine to 1.5, do i need to get it endorsed, and estimate how much cost it would be?

    ---------- Post added at 07:22 PM ---------- 6 hour anti-bump limit - Previous post was at 07:21 PM ----------

    i've heard that 4G91 DOHC fc is even better than ori wira engine 1.3, is it true?
     
  14. Izso

    Izso Boooooossst
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    The difference between modding your current engine with a turbo vs changing the engine altogether is the hassle of puspakom and JPJ registration.

    Turbo-ing your car you don't have to do all that. Just avoid JPJ roadblocks if possible. :biggrin:

    In terms of fuel consumption expect more with a turbo-ed ride purely because of the laws of physics. More power = more air (turbo) + more fuel.

    The other thing is you'd have to monitor the oil temp, water temp more vigorously. Other than that the amount of money spent on a proper BOT will be almost as much as changing to a 4G91 and having it refurbished (new seals, skim, etc)
     
  15. steven7810

    steven7810 mivec user
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    Hello... Good morning... Bro Aira... Go for 4G91 1.5 DOHC engine.. Take half cut convert all the items tat in half cut to your car.. Such like
    Disc brake front if can rear disc also... If can check or replace new set of brake pads.
    Dashboard with or without digital air condition... Air condition gas...
    Engine.. Change all the belting,water pump,gaskets,engine oil,gear oil,brake oil..
    Radiator clean and flush.. If got extra RM ah change to Aluminium radiator..
    New rims new tires...
    Inspection Puspakom. Owner or runner.

    Good luck bro.... From Steven..
     
  16. AIRA

    AIRA 5 Year | Silver

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    thanks Steven, 4g91 DOHC it is huh :)
    Let say if i want to change the engine can i still used my old wira dashboard or do i need to change to the mitsu one?

    ---------- Post added at 12:14 PM ---------- 6 hour anti-bump limit - Previous post was at 12:13 PM ----------

    Bro steven, how much do u think it cost to change all of those?
     
  17. steven7810

    steven7810 mivec user
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    Hello... Bro Aira... The half cut price and installation you can check with those half cut shop..
    Price should be around RM 4,000.00 not include the parts tat I mention early..
    I can recommend you few shop in Kuala Lumpur... If you comfirm to convert..
    Just transfer all the part from half cut to your beloved Proton Wira...
    And keep the old dashboard in case the half cut dashboard got problem,if you planing to use back the anolog air condition( Normal Air Condition)..Because the digital air condition is rare
    now day...

    Ok... Good nite... From steven...
     
  18. Veloc

    Veloc Senior Member
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    I was like u before. Was driving 1.3. I upgraded from carb to EFI. I changed the fuel delivery system. Got a slight gain in power and I got back the investment of fuel savings in a year's time. After that, I wanted to upgrade. I considered a few options. In conclusion, my choice is in the following order (considering fuel economy, power and maintenance):

    4G92 MIVEC
    4G92P (future BOT in mind)
    4G91 (future BOT in mind)

    Why MIVEC over the 4G91? The reason is because you are spending money anyways. 4G91 is not cheap and the MIVEC costs a little more only. Might as well go for the best.
     
  19. AIRA

    AIRA 5 Year | Silver

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    @Veloc

    I've considered Mivec before, how does it feels when driving with Mivec engine? Is the FC is better than original 1.3 engine?

    ---------- Post added at 12:51 PM ---------- 6 hour anti-bump limit - Previous post was at 12:41 PM ----------

    and the other thing, maintenance wise between mivec and 4g91 what is the difference?
     
  20. Veloc

    Veloc Senior Member
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    Sorry, I've never tried. As you can see from my avatar, I've sold my wira in the end and bought toyota. What I listed is the options I have considered before based on cost, performance and maintenance. So just suggesting to you that since you are going to spend the money, just spend a little more to get a higher range.

    P.S. - But I heard, the MIVEC will change your life :biggrin:
     

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