Exhaust???

spetz · Post by **spetz** » Mon Nov 01, 2004 11:06 am

I recently drove my lancer with the V6 MIVEC in it and was not impressed

I am thinking maybe this is due to the fact it has a 2.8" mandrel bent exhaust?

What do people think? Why so slow? Or is it just the 2.0 V6 which has no torque?

Jono · Post by **Jono** » Mon Nov 01, 2004 11:47 am

yeah id say it is the exahust, allot of exahaust shops say 2.25 and 2.50 is the largest you should go..

but all this really depends on what performance aspect you looking for, down low torque, high end , response...

GPXXX · Post by **GPXXX** » Mon Nov 01, 2004 12:11 pm

the 2 litre V6 is actually quite torquey in itself even before MIVEC is activated but fitting 2.8" exhaust on your MIVEC V6 is way too large in NA form for you to have any useable low-end torque...

you should fit a minimum of between 2.25" to 2.5" so that you can still retain some decent low-end driveability.

also is your car weighed down with serious I.C.E? the heavier your car, the less torquey it will feel as well... (i would imagine fitting a 6A12 onto the Lancer would make a world of difference compared to the lethargic 4G motor that it came with...)

spetz · Post by **spetz** » Mon Nov 01, 2004 4:21 pm

It was a bit quicker than the 1.8... a bit...
What size is the stock exhaust?
I want a comprimise between low end and top end.

Car isn't finished yet, needs to be "setup" i'm told...

We'll see what happens, hopefully be qiuck

GPXXX · Post by **GPXXX** » Mon Nov 01, 2004 4:34 pm

are you using the std 6A12 ECU or some sort of aftermarket engine management system?

i believe the stock exhaust on the FTO is 2.25"... upgrading to 2.5" 'should' give you a bit more midrange, but don't expect a world of difference... (when you talk about NA mods, it's all about compromises - you can't have one without the other)

do you have some sort of CAI setup as well?

spetz · Post by **spetz** » Wed Nov 03, 2004 6:51 pm

No the engine is dead stock with stock FTO airbox in the lancer
I think it pulls cold air but still stock paper filter.

Running the stock ECU as well.

The car has no subs or amps, it's pretty light I would say.

And, with power mods I will probably limit them to:
CAI intake with pod
Oversize TB
FPR
Greddy E-manage
Extractors

So what size exhaust should I get for this? I am assuming 2.5"
Mandrel or press bent??

pagan · Post by **pagan** » Thu Nov 04, 2004 5:47 pm

Go no higher then 2.5, i have a 2.5 and is good with nice growl i havent heard anyone say they lost with 2.5 but going larger will have an opposite effect no doubt. just how things are with NA. some one posted it nicely that its produces dyahrea "SP" for the car lol

GPXXX · Post by **GPXXX** » Thu Nov 04, 2004 8:26 pm

always go for mandrel bends - it's slightly more expensive but since you've paid so much money for the conversion, you don't want nasty press bends to hinder the performance out of the engine... it must be able to breathe freely so any restrictions in the exhaust gas flow will limit performance...

as far as NA goes, the larger the exhaust diameter, the more power you will make in the top end, but this will be achieved at the expense of your bottom end torque so it's a matter of finding the right balance. a 2.5" system should be a good compromise and will be beneficial when you perform all the other NA mods (mentioned above) later down the track...

HRD2BQT · Post by **HRD2BQT** » Fri Nov 05, 2004 9:11 am

I agree with GPXXX.

To make it simple, You cant have gains on both low end and high end power range when it comes to exhaust piping.

Smaller diameter say 2.25 is good for street drivving / traffic light draggs coz straight roads r limited - bottom end power has the advatage.

Bigger diameter say 2.5 up is good for drag strip / track legal racing coz here's where you can use the full potential of your car. I wudnt go bigger than 3.

I've seen hondas with bigger size piping from the headers (pre-cat) then smaller piping (very good quality mandrel bent) from the cat back. Then again, it reallly depends on how the engine would response to this type of mods. As most modder say...its a trial n error type of thing.

spetz · Post by **spetz** » Fri Nov 05, 2004 2:28 pm

I've always thought 2.5" was a good upgrade for an fto with mild mods.
But like everyone said and I thought myself 2.8" is too big.

With the press and mandrel bent, even though I will go for mandrel bent a lot of people think press bent is better as with mandrel bends the inside part where it is welded is rough and worse for airflow than press bent. Because most exhaust places have pre-made mandrel bends that they just weld accordingly to straight pipes to make a full exhaust.

HRD2BQT -
Can you tell Charlie to change my cat back to 2.5" mandrel bent but keep that muffler that is on? Maybe he can put my 2.8" on that blue lancer with the evo V engine, I'm sure he would be better of with 2.8" than I would be!

HRD2BQT · Post by **HRD2BQT** » Fri Nov 05, 2004 4:01 pm

spetz wrote:I've always thought 2.5" was a good upgrade for an fto with mild mods.
But like everyone said and I thought myself 2.8" is too big.

With the press and mandrel bent, even though I will go for mandrel bent a lot of people think press bent is better as with mandrel bends the inside part where it is welded is rough and worse for airflow than press bent. Because most exhaust places have pre-made mandrel bends that they just weld accordingly to straight pipes to make a full exhaust.

HRD2BQT -
Can you tell Charlie to change my cat back to 2.5" mandrel bent but keep that muffler that is on? Maybe he can put my 2.8" on that blue lancer with the evo V engine, I'm sure he would be better of with 2.8" than I would be!

spetz,

I dont see any reason why the inside of a mandrel bent is going to be rough. The welding is from the outside not unless your trying to weld a different type of pipe each bent (one is ticker the other is thinner)....but if u r to weld as much mandrel bent of the same "PIPE" of same diameter - this should be as smooth as stock.

About swapping your piping, the blue lancer has got 3" piping made already. And if u wanna change it, ask charlie directly. Charlie hates 3rd party conversation.

payaya · Post by **payaya** » Sat Nov 06, 2004 9:52 pm

after all its a 2.0L! the FTO does spec 147KW for the FTO by at a very peaky 7500 rpm! So i guess it doesnt feel 147KW and some can say feels sluggish.

spetz · Post by **spetz** » Tue Nov 09, 2004 6:35 pm

I already asked him but it's hard to talk over the phone I was hoping you could clear it out.
Anyway he let me know it is 2.8" outside diameter, does that count as a 2.8" exhaust or not?
He was telling me he is going to put a fuel cut defender... not really sure what's going on to be honest