Exhaust System for DOHC 4G63 NA

[DisturbingThePeace]

i don't think there's that much of a difference if you go either muffler or resonator. the loss in power if you choose to install the muffler is probably very minimal to none and might not even notice it. The only difference you'll see or hear between the two is how loud the exhaust will be. I think either way you'll be fine.

I would recommend installing a turbo muffler than a chambered muffler to quiet things down though.

boss meron na kasi ako muffler nakuha from a friend. ano ba benefit sa turbo muffler ng 4g63 NA engine? thanks

[SR71Blackbird]

boss can you enlighten me about reseting ECU or what it does?
is that necessary if i just install a pipe then muffler replacing my scav?
thanks

It is just like reprogramming the ECU Fuel Mapping in reference to Owner's driving style.
The procedure was discussed on URL below and holds the answer to your (two) questions above:
http://www.autoindustriya.com/talkboard/well-maintained/disconnecting-battery-during-a-vacation/

[rt140se]

Boss, first of all thanks for your very helpful informations, its like im just asking my first of ten questions and you already answered everything. are you related to sir SR71Blackbird?  :notworthy:

just to give you an idea my goals are:

-quiet exhaust (little loudness is fine since im not going to install resonator but muff only)
-maintain or improve my HP
-get rid of low-mid issue due to scav muff
-have a decent/quality audio for listening pleasure (just installed subs, eventually add seps and replace front stock speakers then upgrade my HU)

what i want is just to drive slow and relax with good sound setup but in case i need to use HP like overtaking or something i still got it

before i was planning to have complete I-H-E setup but i learned that it still depends on where or how ill be using my car (i dont race, usually city driving). im trying to save gas as possible as i can, given the fact engine is 2.0 so ill get rid of scav and install a muffler

what do you think if i just remove the scav and connect a pipe from where it is installed then my chambered muff? do i need to use special kind of pipe or i can go with the regular type then muff since I-H-E setup is not a big deal for me? thanks

glad to be of help... blackbird and i are form neighboring cities, malabon and caloocan.

are you sure about not having a primary muffler? coz if that's how it is, then i can't even imagine how loud and how much vibrations you're enduring... it must be biblical! :surprised:

if that is the case, yes, the cheapest route you can go is to be rid of the scav end and attach a matching size pipe and just follow the original layout all throughout the system then install the chosen muffler at the back. it will still rumble for sure but the vibrations will be lessened at least.

sir ano ba issue sa mitsu regarding ECU pag nagpalit exhaust? what do you mean add piggy back and safc for the loss? zero idea 

basically, any change aimed at improving engine performance like removing or adding parts really requires an ecu reset so fresh data is fed to the ecu's cpu upon start. learning time will be shorter and more accurate.

sorry if it sounded alarming but it shouldn't be. ECU's has the ability to learn a number of things like how the driver uses the throttle, the rhythm of your driving and a lot more. even at a dated state of the gt-i, i know its ecu is smart enough to do that. resetting the ecu helps the learning ability of it by using all data being read by the sensors installed in the system. as to how much air is going in and how much fuel is needed and such and such...

let me use myself as an example... lets use an analogy of changing perfume from fahrenheit to cool water and i am the ecu;

my system is so accustomed to using fahrenheit. but after a long time, my owner wanted to use cool water. so being accustomed to fahrenheit, what i've learned in time is just to use perhaps 3-4 sprays and i'm good to go for an entire day. now cool water maybe a little too light and my usual 3-4 sprays fades within only reaching half a day. so me as an intelligent learning (adaptive) ecu, will try to compensate and add as much spray as i my program allows me to in order to keep the scent good for the entire day.

however, even as an adaptive system, my abilities as an ecu is still limited to what the manufacturer has preset. say, the only max spray i can proactively do is limited to just 10.

with my abilities maxed out, the owner feels that its still not enough...

this is where the piggyback comes into play.

safc stands for super air flow converter (controller). it can alter the systems performance and stretch it further by adjusting the air and fuel mixture (means you can add/lessen both air and fuel delivery) and override the abilities of the ecu to fine-tune the entire system for optimal performance.

[aid03]

boss meron na kasi ako muffler nakuha from a friend. ano ba benefit sa turbo muffler ng 4g63 NA engine? thanks

wala naman masyado, just the sound difference. turbo muffler is quieter than chambered. since you've already purchased one just get it installed and see if you want to add a resonator later on

[DisturbingThePeace]

mga boss maraming salamat sa tips..update ko kyu pag nakabit na muffler

hanggang sa muli ko pagtatanong  :rock:

[SR71Blackbird]

Is it fair they will charge me 3800 by just removing the scav then install the pipe 2.5" and muffler? thanks

In a nutshell, it is fair enough since you are installing a FULL Exhaust System. Price varies depending on the items below which you may opt to ask.
1. Kind of Pipes
2. Number of Bends
3. Crushed or Mandrel Bents
4. Fabricated Flanges
5. Exhaust Gaskets
6. Rubber Hanger
7. Number of Welds
8. Ordinary or TIG Welded
9. Polishing (or Painting for BI)
10. Labor

Please note that the Resonator was not yet included. Apparently, most Exhaust Shop will discount most items above should you opt to buy the Resonator. This is where your haggling skills are needed and where business relationships are being forged.

Enjoy. 

[DisturbingThePeace]

In a nutshell, it is fair enough since you are installing a FULL Exhaust System. Price varies depending on the items below which you may opt to ask.
1. Kind of Pipes
2. Number of Bends
3. Crushed or Mandrel Bents
4. Fabricated Flanges
5. Exhaust Gaskets
6. Rubber Hanger
7. Number of Welds
8. Ordinary or TIG Welded
9. Polishing (or Painting for BI)
10. Labor

Please note that the Resonator was not yet included. Apparently, most Exhaust Shop will discount most items above should you opt to buy the Resonator. This is where your haggling skills are needed and where business relationships are being forged.

Enjoy. 

boss thanks again for these informations. first thing i thought, it just a piece of long straight or bent pipe, some weldings on it from headers to muffler and they will charge me 3800 already.

guess it looks simple to someone who has no idea that much in full exhaust and by the way my first option is not to put a resonator then see whats going to happen from there.

[SR71Blackbird]

Sorry, I forgot.
You'll surely be needing a (pair or single) Flexible Exhaust Pipe in case your scav setup omitted such item.