Just asking can i change 4g92 single cam to gsr twin cam? Is there any problem will occur if i swap this head? Any comment or suggestion.. Thanks you in advance.

Not worth it. Tried it 10 years ago.

I tested this swap with my 4g93 1.8 single cam. The sohc ecu might not support it so well, I ran into engine response and drivability issues
At +6000rpm, basically it feels it is running out of air and fuel.


Eventually I put back my ported single cam in. The low rpm torque response of the bigger block (I had 1.6 high comp pistons) is so much better...you get almost all your torque by 3500rpm vs 5000rpm.on the twin cam, which means city driving and mountain road driving is all that much better. Don't forget the sohc head is lighter and has less parasitic losses, so the engine, with lighten flywheel, actually feels more lively.

If you are not adverse in doing an engine swap and registering, just drop in the 1.8 sohc. It's very cheap. Direct drop in.

On my lightened satria (950kg), passengers comment my car feel turbocharged due to that instant torque response. I recorded about 7.5 to 100, which is faster than the 4g93 dohc in the (albeit, heavier) satria GTI

This post has been edited by jaycee1: Jan 22 2020, 12:43 PM

I am new to this car modification. Just bought wira a/b 1.6 xli.. Thinking to swap to dohc instead of soch. My mechanic say if swap with 1.8 gsr dohc will have problem with the tappet lifter. He say its better to put use td04l turbochargers.

dun waste time and money to swap dohc.

u want more power just swap halfcut 1.8 turbo gsr.

Gsrt kinda pricey for me. Plus my wira is auto not manual.

you will need to swap the ecu / retune with piggyback ecu (cheaper opt)
any reason why you wanna swap this cam?

Reason? I think dohc provide more power to 4g92.. I want to unlock the engine potencial i guess. Plus will be driving long distanse for this car..

but why auto tranny..? intel atom processor type transmission, super delay on gear change.

u dun spend money for gaining those 1% power…u might better spend the money to change the whole exhaust system from extractor to muffler, or/and better tyres.

back to the point…ask yourself where does n.a engine gets power from?

u need bigger displacement for more fuel more air.

Will be sharing car with wifey later.. She really dont drive manual... I dont really want to make super duper 2++ bhp machine... Just a normal car that have maybe a little bit of power than normal car.

I think i will be installing turbo but i didnot really understand ur point about bigger displacement.. Care to explain.. Sorry i am really new to this modification actually..

very insightful and straight to the point

If can i really dont want loud type exhaust.. If cant then i think no choice..

You don't necessarily need to be loud to be fast.

I think there's lots more you need to do research on before deciding, that's the fun part.

Have fun with your build bro.

Cared to give me some pointer sifu. Help la newbies wanna learn..

one of the engine restriction is exhaust
catalytic converter and muffler.
muffler is silencer, just change some performance and quiet muffler and catalytic converter will feel immediate gain. not much.
if you dont wanna spend much and gain power, exhaust is one of it. below RM1k.
stuff like air intake / open pod wont give you much.
google some stuffs and you'll know alot more.
goodluck modding

I really wanna learn but i dont have anyfriend that can help me with this car modification... View some on youtube but dont really understand half of what they saying... Its like watching greek movies without any subtitles... Maybe the exhaust will be the last mod after i finishes the enginebay..

Remove restrictions in cylinder head
Bigger throttle body
Upgrade the whole exhaust system
Change the camshaft
Pulley, flywheel

It’s never ending when it comes to modding your car.

If TS doesn't want to spend endless money to upgrade your current engine, just go for 4G93, higher CC = more torque & power.

Turbo setup is not cheap either and it will required exhaust modification. Apart of that, turbo maintenance is totally different from a NA engine especially long distance travelling.

Remove what restriction in cylinder head.. Heard some mentioning on compresion ratios... What was that?

Can give me pointer on how to maintain on long distance driving?

It’s more like allowing more air flow when through the valves to and from the cylinder head. Don’t scratch your head on this. Focus on other mods available.

Driving a turbo, don’t feel itchy keep boosting. It’s very tempting, I know.

GSR 1.8 turbo is a really good engine. You can try to survey on this on even the 4g93 dohc

4g93 is oversquare engine right.. Before buying this wira c98 i do consider c99 4gp3p sohc.. But then considering there are not alot c99 a/b available that why i choose c98 a/b sohc. My first plan was to change from sohc to dohc but my mechanic say it will make the lifter tappet making clicking sound and and will be affecting the auto gb.. He also say that auto cant boost too much. Maybe 0.7 bar only..

I dont really get your point on this.. Which part to change to archieve this?

I own 1.6 Wira and mode to 1.8 before and let me tell you if you still want to stick to Auto. Upgrade to 1.8 4G93 SOHC is more better compare to modify to DOHC as Auto need a lot of torque at low RPM. DOHC is suitable for manual as the power is all at high RPM like over 3~4k rpm. Auto usually will shift gear around 2~3k rpm so you will need a lot of torque at low end to drive and shift better and the fuel economy also did not impact much compare to DOHC mod.

SOHC - Cheapest, more fuel efficient and easier to maintain drive
DOHC - Expensive and need to mode ECU to add piggyback to get the full potential. Parts are more expensive compare to SOHC and getting even rare.

Auto cars need a lot of torque at low rpm, the only mods i did in my previous 1.8 wira only direct transplant the 4G93 SOHC engine with the extractor from half-cut. The rest exhaust still maintain, if you mode to bigger pipe or take out the catalyst converter the torque delivery also will drop. Even the intake also maintain same, using original OEM filter and change every 20k mileage.

What you said echo with what my mech said. Just wanna ask should i change the auto gb to 1.8 or 2.0 gb after i put bolt on turbo in this car?

If you want to play turbo, just direct get a GSR turbo half-cut and transplant
Dont waste time & money rojak here n there, you will get a lot of headache and mechanic will be happier as you will always visit his place to fix here n there.
A lot of people never calculate the time and side effect of bolt on turbo to car. The original engine and ECU is tune to N/A, if want to modify to turbo you need to upgrade a lot of internal engine stuff & ECU/piggyback which cost a lot of money and may not be done right if the mechanic is not good in this.

If you want to stick to Auto, the best choice is just upgrade to 1.8 4G93 SOHC engine.
The gearbox can still maintain from 1.6 Auto gearbox but recommend to just upgrade or add on oil cooler for the gearbox.

This post has been edited by littlefire: Jan 25 2020, 10:56 AM

I see.. Thanks for your insightfull comment.. Btw which gb should i be looking if i want to change the gb

I tot you mention that your wira is already 1.6 Auto.
You want to change to manual? If want to modify also same just go buy from half-cut area.
Dont waste time & money on this also.
If you just want manual only why not just go buy a 2nd hand manual satria or Putra it is cheaper nowadays.

Sorry i forgot to say change auto gearbox to better auto gearbox..

Thought nowadays not easy to do engine transplant like 20yrs ago ?

Still easy. In fact still have people stamping the engine chassis so the engine shows 1.6 or 1.8L instead of 2L. So they pay 1.6L road tax instead of 2L road tax. Save 300 a year

As per feedback before 1.6 Auto gearbox can be fit with 1.8 engine 4G93 SOHC without issue.
There is no need to upgrade the gearbox, just add an automatic oil cooler good enough.
Dont waste money bro, Auto gearbox is not cheap also.

This post has been edited by littlefire: Jan 26 2020, 06:16 PM

Okay bro thanks for your advice. I think i will be sticking with 4g92 soch plus td04l with rechip ecu.. I will be posting my finished project later on..

This post has been edited by ken_hidaibuki: Jan 26 2020, 08:55 PM

Good luck and may god find you a good/honest mechanic to advice you on your modification route/cost.

Still if i were you, if die die want to get for the turbo itch.
Is better to buy another ride which already done the turbo modification/transplant
Since a lot are in mudah & carlist nowadays just get your trusted mechanic to go inspect the car before purchase.
This will save more time, money and less headache for both owner & mechanic.

This post has been edited by littlefire: Jan 27 2020, 12:29 AM

Last time i used to own a year 1993 wira 1.6xli auto.
Started with simple mode from sohc to doch head.
Then complete half cut mivec.
Gear box just dont last(change atleast 3 times)
At the end sold it off as the car is aging fast. Just too many issue with car.(too many to list out)

Honestly modding a 1.6xli is waste of money.

hey bro, how's your upgrading project? Completed? interested to see the end results. mind to share. thanks.

Hello sorry for the late reply. My project got stuck after overhauling. But still high hope to finish it.. I will post mt result when done.