Hi guys.
Need ur help on tuning "air/fuel ratio" On 4G13/4G15 carburetor.
I changed to open pod setting but not quite satisfied.
Before this stock intake can reach 180kmh but now 160kmh is damn hard to reach.
Few people suggest using spark plug head as screw to tune it but i don't know ler..

cause you got more air comapred to fuel now, lack of power.

I'd suggest you look for uncle fred aka fstrader on the marketplace, super duper professional carb tuner for 4g engines .

People like me and you can never get it right. People like him gets it right through his nose lol.

are using cap ayam open Pod?

his nose is wideband o2 sensor maa...

All people in the forum suggest me to go find unker fred.
I've asked unker fred few months ago liao.
But unfortunately, unker fred ask me to change back to stock setup.


Bukan cap ayam bro..K&N..
Angin lebih punya pasal ni..

Bro,ur long intake pipe good ke?
Top speed got or not?

haha.unker gettting old sumore.

ade kedai tune carb..
dia ada CO punya tuning.. masuk lubang exhaust tu.. baru tune carb.. kalau nak cun la.. kalau guna pakai dengar pon boleh..

hehehe

or else go to PJ state shell statoion, theres a workshop there that has this CO analyzer machine

unker fred is right
i olso diy open pod
respond good but top speed crap
change back closed factory still the best
what not open pod sucking all the hot air and the air ram paip lenght so damm small so restrict air speed

good laa...
top speed dunno leh... habis meter i start goyang d also havent tekan finish...

More air will result cooling effect to your engine.....
If want good response, suggest to blow your original air filter every 1000km.... More work but will work, up to certain extend....

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Added on April 15, 2011, 8:47 amMore air will result cooling effect to your engine?
What air you mean? The air into engine or air into the engine bay? If engine bay then yes, if into engine then wrong. Ppl who use turbo cars have their car tune to be slightly richer (more fuel vs stoich a/f ratio of 14.7) to avoid detonation and provide some cooling effect.

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Added on April 15, 2011, 8:49 amActually, 160-180 km/h on 1.3 liter is damn impressive if you ask me! I basically never drive over 160 on my 1.6.

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Added on April 15, 2011, 8:50 amBtw amir, why don't you give maddriver a call to see if he know how to tune? He's damn friendly, even for a shy guy like me I have no problem talking to him.

This post has been edited by GEFORCEXTREME: Apr 15 2011, 08:50 AM

kedai tune tu kat mana eh? whereeeeeeeeeeee?

I see..so if using CO analyzer machine more accurate la?

I've done a good heatshield wor..
siap cover dari heat radiator tu..
confirm all the air is cold one..
the ram pipe is 3 inch.i'm thinking of extending the ram pipe..
but if not effective rugi ler beli pipe...

aiiii...habis meter tu berapa kmh bro?..hihiiiiii...

So u suggested me to change back to stock intake or what?

Well...carburetor is no brain one..
no speed cut..
i wanted to ask for maddie's help..
but the problem is...
maddie also ask to change back to stock intake!
hahahahaahaha

So, our friend's car is normal or turbo engine? Use a gas detector to test your exhaust gas first before bringing that uncomplete version of wiki info.
That 14.7 are just a general ratio, still have to know the hydrocarbon chain that have inside petrol.

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Added on April 15, 2011, 9:55 amYeah, just stick with original. Other mods like spark plugs, plug cables, extra grounding will give you better results, best of all, improve your FC....

This post has been edited by kyheng: Apr 15 2011, 09:55 AM

I see..hmm..but stock intake not good throttle response as the open pod that i'm using now.
So now i'm finding a way to keep the current throttle response and reach the last top speed i've reach before when using stock intake.
Tuning carb and extend intake ram pipe will make difference?

Like that.... Maybe block the pipe of your air filter a bit may help? Have to know that, air flow to your engine are designed and calculated, putting more air in that will only improve the performance until certain extend. Or make it this way, original air filter won't give you enough air....

Hmm..but sometimes i think it is because of air too fast going inside..
Maybe extend the ram pipe will make the air slower..

Can also I guess? But I'll try and error to get the best results.....

Yes agree with u..try and error to get the best result..
I'm hoping for someone to post picture of how to tune the Air/Fuel ratio before i buy longer intake ram pipe or change back to stock..

Got a screw at the engine, have to adjust that... But the actual location I'm not that sure.... Can always ask your foreman to adjust for you....