Hi, recently just convert my 1.6 4g92p from auto to 1.5 4g91 manual using clutch cable type gearbox. Want to ask, use straight flow good or s-flow good for pickup?
I've heard s-low for auto cars more good, straight flow for manual more pickup?

And how to know the fiber 'left' in an straight flow muffler if i wanna buy from halfcut shop?

This post has been edited by wilsonwc: Apr 29 2012, 08:52 PM

straight flow 2inch

Two mid box, 1.8" SST piping, S-flow muffler

standard original 1.6 is how many inch piping?

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Added on April 29, 2012, 10:05 pmWhy S-flow? erm, i driving 100km/h, rpm oredi reach 2.8 @@...i gues i'll aim for pickup, but i now put back original s-flow muffler feel so underpower jor....

This post has been edited by wilsonwc: Apr 29 2012, 10:05 PM

You dont wanna restrict the gas flow with s-flow. You will lose a lotta Horses and your pickup will be like a cow.

go for straight flow.

TS don't listen to all the BS in here about getting the straight pipe, if u r using NA small displacement, go for S flow better, even for manual

Piping go for 1.8" inlet diameter or max 2" outer diameter, 1 high flow midbox/bullet is enough, muffler is up to you

Most important of all, get a good tuned length extractor first

yup...dont listen to all the BS here!

S-Flow restricts gas flow. YOu DONT WANNA OBSTRUCT the Gas Flow!! Why the hell does someone recommend this for manual car...I have no idea.

straight flow la kawan for manual...

Another Bullshitter talking ~

Exhaust Knowledge For IDIOT/"LCC" Lan Ci Ci people !!!

The Kwai Lo / Omputih which is a expert in car modification say :- "Steer clear of reverse flow mufflers"

Does this writer from Autospeed.com.au is a bullshitter too ? he may get sued if the information is not right !

Anyway gentlement , u judge yourself who is the "real" bullshitter here ... LOL

This post has been edited by Wilson13B: Apr 30 2012, 02:06 PM

If i remain my ori piping direction, change to straight flow is it more pickup? Because im using straight flow but how ever when chg bek to normal, the car is so heavy to move even press fully...

This. +1

I personally used straight flow. Then changed back to ori s-flow muffler! Backpressure for going uphill was so much better even at 4th or 5th gear. The straight flow was always losing power when going uphill on 4th/5th gear.

ya i know, but the front pickup is like a cow...coz maybe back pressure too much?

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Added on April 30, 2012, 6:20 pmAnd want to ask forumers, is there a way to repair the fuel meter? Because i guess all wira had this problem, the fuel meter goes down quite fast after after Mid level...is there a way to change the tank fuel detector?

This post has been edited by wilsonwc: Apr 30 2012, 06:20 PM

And why are you even going uphill on 4th gear unless you have run out of RPM on 3rd? You are suppose to drive with the correct rpm to get the max torque and power out of the engine and not drag the car up on low rpm on high gear. If you can't drive a car properly, all the equipment in the world is not going to help your car get more power.

Umm.. Maybe cause I still like top end rpm's feeling when high revving.. So, i sacrifice lower pickup i guess. haha. sorry, been out of the automotive modification thing too long to remember these theories.

Hi sleepwalker, I have seen much of your postings before and although I don't remember where exactly, do know I respect your opinions.

You may have fell to conclusions too soon. I was saying that even at 4th or 5th, it can still go uphill well, compared to last time. BUT, that was just a test. If i was to go uphill quicker or whatever, I usually still downshift. Nothing wrong with going up with 4th gear, if the hill isn't too steep, if the car can still go well. Cause it also depends on my speed right.. etc, etc.

Cheers.

What is your current setup?

(I'm with 27needles. Currently on Straight flow. Planning to change back S-flow but aftermarket big ones lah. The noise is making me & occupants crazy. )

then why Mugen still making S-flow mufflers and selling it with a huge price tag, some more got ppl buy it? do u think these 'experts' that u said are more 'expert' than Mugen which is a multi-million dollar establishment with tonnes of R&D invested and DECADES of experiences with automotive tuning and modifications in NA engines?

i rest my case here, no need to say anything more

Bro ... when u say about Mugen muffler ... do you realise that Mugen Mufflers are generally twin-loop design rather then S-Flow ?

Let me explain to you la .... Twin-Loop muffler is a straight flow muffler with a loop of piping to cancelling the sound pressure wave create by the straight flow ... the loop carry the sound wave from front of the muffler to the rear to have the "self cancelling" effect thus exhaust flow like straight flow but still remain silence ~

If u say a S-Flow muffler is better then a Straight-Flow , i would like to hear your explanation.... cause it just out of logic that a more restrictive muffler will work better then a less restrictive one

I know someone with a b16a who switched from straight flow to mugen twin loop ori...switched back to an even louder straight flow in less than a month....

He said it sucks....lost power everywhere....car felt heavy etc

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Added on May 1, 2012, 11:44 amI know someone with a b16a who switched from straight flow to mugen twin loop ori...switched back to an even louder straight flow in less than a month....

He said it sucks....lost power everywhere....car felt heavy etc

This post has been edited by mADmAN: May 1 2012, 11:44 AM

If noise is your concern , Japanese straight flow is the right choice for u ... with jasma cert / tag certified of course ... can barely hear the bassy sound even cruising at high rpm

Then it must be a very BIG muffler?

yes straight flow. But no sound cancelling. Normally sound canceller wave is done by midbox. Muffler, muffles



You can use a 1.8" piping setup with a much bigger muffler s-flow without being too restrictive. You can check with specialist like everco, they do make good S-flow mufflers without being too loud.

Remember, all loud but no go is no good. it has to be efficient. Hope everyone can exchange knowledge instead of throwing harsh words. Peace

Erm, my current setup are actually standard 1.6, which is 4-2-1 extractor to cat back, then a small bullet and straight flow FireHill exhaust, too loud then i change back to normal wira exhaust and the car feel 50% heavier...piping are using ori direction...i don't want to invest too much money on changing piping size and route because of the fc...further more my wira oredi makan fc like gila, full tank only go about 280-300km/h after i convert to manual, befor ethat auto only can reach 260-270km/h

Well.. this is definitely good for a warning.

Just change to a bigger muffler(but not too big s-flow). Stock muffler mmg restrictive. That's why its silent. Fc depends on right foot.

Btw your car damn fast wei.

heh i actually didnt notice it until your post

Anyway, Straight can be silent " no raspy sound,only low bassy sound" ... it depending on the design,don't compare with those Kakiexhaust straight flow,their design are terrible .... try to go to Sunway and have a look around like kakimotor,N1 racing or the famous exhaust shop like JFA & Everco .... see their product and compare them with Kakiexhaust product , straight u will find the quality difference ~

There is a straight flow that can be silent like S-Flow .... it is done by welding a sound resonator between the piping and the straight flow muffler "like HKS Silent Hi-Power"

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Added on May 2, 2012, 7:36 am 1st time i heard ppl say that S-Flow are better then Straight Flow on gaining power from the engine .... he still want to say ppl noob somemore .... he should polish up his car tech knowledge in google first before posting anything here to embarrass himself

This post has been edited by Wilson13B: May 2 2012, 07:36 AM

HAHAHA, sorry...is 260km =.= using back ori s-flow muffler, my wira only can run 8.6/litre...using straight flow is about 9.5/litre... 8.6/litre is same as camry ron97 =.=

This post has been edited by wilsonwc: May 2 2012, 07:08 PM

piping too big. nothing to do with backpressure crap all exhaust shop been talking about..

try reduce piping size, definitely no problem with straight flow.
that 's-flow' and 'backpressure' is compensating your wrongly huge piping size..