For the center piping.....

There is always the minimum, and the maximum specification before you get power loss for the whole system. I cannot confirm you what's the max and min size, because it also depends on the engine characteristic and the input at each cycle.

An example....

Let say the piping is 50mm at stock, giving you a lot of torque from 4000-6000rpm.

Then you increase the size to let say 55mm. The possibility is that you may gain torque only later, at around 5000-7000rpm. You see... your max torque has been shifted to higher rpm. To make it simple.... just say that the power comes late. The advantage of a late torque is you may have more maximum hp, but of course at much higher rpm.

However, there might be another situation where increasing the size would surpass the maximum spec... let say 65mm... where your engine had some power loss and your torque is lower all across the rpm range. This is possibility too.

I just changed my extractor using Hot Bits 4-2-1
heh heh
Power Zone's must add another Rm100 so decided to try Hot Bits

The pick up improved significantly and it feel comfortable accelerating.

Sound wise......above 2500-2700 rpm, there''s an increase in sound
normally I drive around 1800-2200rpm. Rarely go above 2500rpm unless going up hill.

Anyway my other mods to my exhaust system are the removal of my catalytic converter and my resonator(bullet/centre muffler) which I replaced with different type which is supposed to be better.

One of the things that really gave significant extra power was the removal of catalytic converter. It's the biggest restriction in the exhaust system.

somehow i feel that the 4-2-1 made a bigger difference.
I removed the catalytic converter about 6 months ago and.....the difference isnt as much as the one I felt recently. Perhaps, the reason there is so much difference is being the fact that I already removed my cat con and the 4-2-1's effect could be felt even more.....

just a thought....well it doesnt matter cause I am happy with it.
Worth every penny I spent....

the previous one was 4-1? what car was it?

are you referring to mine?
if you are then my previous one was a stock. Think its a 4-2-1 as well based on the way the tube connects. Kia Spectra. Korean scrap metal.

but I am happy with it

Want to ask.. modification to the intake air filter (open pod/ram intake pipe) as well as extractor & exhaust modification.. is this street-legal and no problem with JPJ? Planning to do it on my Wira soon..

'supposed' to be legal

i just had a new transplant to MITSUBISHI 6A10(1.6 V6, 24valve)
it was a halfcut, so it didn come vf da exhaust

so any recommendations on wat type of exhaust system 2 use?
(im a noob in exhausts)
quote da price n place 2 do also.....

SPECS of 6A10:
6A10
- Displacement: 1597 cc
- Power: 140 PS (103 kW) @ 7000 rpm
- Torque: 147 Nm @ 4500 rpm
- Power density: 7.71
- Engine type: V type 6 cylinder DOHC 24 valve
- Fuel system: ECI multiple (electrically controlled gasoline injection)
- Fuel type: Unleaded premium gasoline
- Compression ratio: 10
- Bore: 73 mm
- Stroke: 63.6 mm
- Fuel consumption at 10-15 modes: 8.3 L/100 km

6A10 can be found in year 93/94 Lancer and Mirage
__________________________________________________________
im plannin 2 do tuning also after doin da exhaust, because it is only givin me 150km for rm50(1.92p/l)

stick with the original header/extractor..... but probably for the piping you can try 2" diamter piping.

and it looks like your fuel consumption is comparable with my b16a. it should be normal because it's a V6.... extra cylinders plus extra weight

2.0 diameter?
can explain like da mid-box or sumthin n all?
(da whole system)juz tell me wat 2 ask da shop

This post has been edited by motherker: Apr 6 2006, 11:20 PM

Ok for your 6A10, its a 1.6 engine, and its a V6. So basically, your extractor should look like 6-2-1 if its gonna end up with one single muffler. Nowadays most v6 goes with 6-2, with twin mufflers and a crossover pipe between the two outgoing pipes, which looks kinda like a H.

Before you do up your exhaust system, first decide what you want. What kind of driving style do you want? High rev, power coming in the top RPM range, or normal driving, maximizing torque delivery on the lower RPM range? Do you like to hear exhaust noise, or you want the noise to be kept to a minimum? All these questions will affect your final decision.

i would like minimum sound.......
i drive normally.....
i want high-end power.....
i like da look of twin mufflers(like da latest Perdana V6)......
so......wat 2 ask da shop ?
recommend good shops around klang.....
n how much will it cost?

This post has been edited by motherker: Apr 7 2006, 11:58 PM

I got a question regarding the bullet.
What is the difference between a straight flow and the spinning one? Does the spinning ones keep more air? If so what are the advantages?
And what is the difference between a short and a long bullter? Does the size really matter? Will a car with a lower CC lose power if equipped with a long bullet?

i'm not pretty sure what u mean by 'spinning one' .... but straight flowing inlet should provide better flow. the smoother the gas flow, the better it is.

between short and long.... the shorter is better. in fact.... no bullet will give even better gas flow. but the thing is.... the purpose of a bullet is to reduce noise. the longer or the bigger, the better it is.

s-flow resonator works the best at noise reduction.

i've got myself 2.0inch piping+long bullet(kind of twisting shape)<-recommended by shop owner, he said can jimat minyak<<

my setup for my humble 6A10 is = 2.0inch piping+long bullet(twistin type)+Perdana V6 twin muffler

feedback:engine feels very responsive when revved up....(mechanic told last time da air from da engine choked 2 come out of the 1.5wira exhaust setting)
haha......juz press da pedal a lil bit aso, da rpm climbs up
laz time, like u feel a lag.....

.....VROOM..VROOM....VROOM......eat my dust, Perdana V6 S**k*r

i've got myself 2.0inch piping+long bullet(kind of twisting shape)<-recommended by shop owner, he said can jimat minyak<<

my setup for my humble 6A10 is = 2.0inch piping+long bullet(twistin type)+Perdana V6 twin muffler

feedback:engine feels very responsive when revved up....(mechanic told last time da air from da engine choked 2 come out of the 1.5wira exhaust setting)
haha......juz press da pedal a lil bit aso, da rpm climbs up
laz time, like u feel a lag.....

.....VROOM..VROOM....VROOM......eat my dust, Perdana V6 S**k*r

i've got myself 2.0inch piping+long bullet(kind of twisting shape)<-recommended by shop owner, he said can jimat minyak<<

my setup for my humble 6A10 is = 2.0inch piping+long bullet(twistin type)+Perdana V6 twin muffler

feedback:engine feels very responsive when revved up....(mechanic told last time da air from da engine choked 2 come out of the 1.5wira exhaust setting)
haha......now, juz press da pedal a lil bit aso, da rpm climbs up
laz time, like u feel a lag.....

.....VROOM..VROOM....VROOM......eat my dust, Perdana V6 S**k*r

This post has been edited by motherker: Apr 12 2006, 08:54 PM

triple post...

I'm going to get a middle box soon. How much did the person charge you?

sorry mod, 4 the triple post, my comp jammed, u can delete it off....
da middle box im not sure, but da whole set up (2.0 inch piping+middle box<long n twisting type<<+perdana V6 twin muffler+RM590(inc.installation)

PS: i checked the other shop on da same row, he charged RM500
but i didn do bcoz da man did not look educated, he said need 2
modify da muffler laa bcoz wira small laa ...bla...bla...bla.....
da shop owner which quoted RM590 explained properly and all laa...
fortunately, da shop owner was my dad's fren's son....haha.....so
got it all done at RM550
very satisfied vf da installation+performance........

my middle box was the most expensive 1....da owner recommended...
i think abt RM200 like dat....(mayb less...dunno laa...hahaa)