Xforce muffler

[lucio_libre]

I got my muffler today, 270 fitted, twin pipe free flow. Looks awesome with the chrome finish, but whats even more impressive is the awesome sound :D . At 2000 revs i think EPA would do me, at idle it sounds crazy, burbling away, once it gets past 4 grand the windows must be closed and the music loud, i wont even describe lift. Ahhh my BIG YAMAHA bike :D.

[saintz01]

looks sweet mate :D . hey can ya give me the details for the muffler you got?

[Ilivfor6]

How is the performance of the exhaust Lucio?

Peekay34 & myself ran a side by side test on saturday to see what difference his exhaust made to his stivo for a very interesting result.

In 2nd gear side by side we both accelerated from about 2000rpm together. By 6000rpm his front bumper was just behind my back bumper and then in Lift I started to pull further away. We did this in both directions for the exact same result.

End result a more free flowing exhaust ended up losing power in every rev range to the standard exhaust. We did this as we are researching the best option for exhausts on the stivo. Obviously we are now still Looking!

And the guys from the exhaust place that did it for him did not know what the f@ck they were talking about as this was their best recommendation. They obviously thought he said big power loss not gain <_< <_<

[Toohey]

I posted earlier in the year about comments that an exhaust fabricator made to me about the Stivo system.

"I was speaking to a bloke on the weekend who fabricates and welds the exhaust system for the Monaro being exported to the US (under Pontiac badging) and he is mad keen about his Corolla's, he was telling me that it is much better for the 1zz and 2zz to have a really free flowing piping (at least 2inch as on Stivo) but to really restrict at the muffler.

He kinda contradicted everything else I have read on here with people placing huge barrels up the back.

Maybe he wasn't talking out his a***

[xTiGeRx]

so, you're all saying that..

the xforce muffler, model LP03 that's sitting in my garage...SHOULD NOT be installed to my car?

coz it's a free flowing exhaust...straight though....

N/A require a bit of back pressure...i presume the straight through has nil.

thus power loss...

but still..

what do you guys think?

[lucio_libre]

Ok, ive had the muffler for one night, looks totally awesome but tomorrow morning im putting the original back on, simply because of the noise levels, and to be honest, the original one has a really nice sporting sound to it, the xforce is good at idle and when taking off, after that you cant hear a thing. At 2000 revs, it is ridiculous. In lift, it is absolutely insane, you could hear me from kilometers. I went to the casino tonite, and had the pleasure to set off a few alarms just by cruising around looking for a carpark ;) . I love noise, but i wana be able to listen to the radio on the freeway without having to crank it up3/4. For power, it doesent feel like ive gained anything apart from noise, i cant even hear my cold air working, in fact i think at lower revs i might be lacking a few ponies, which is what i dont wanna lose, low end power. Where are those ear muffs??

The muffler is a xforce python

[illuminati]

Ilivfor6, i warned peekay to not go too big when getting the xhaust. he was orignially planning to go bigger.

changing ur muffler wont do much. but u will loose a few newtons. but u alsways do when changing the xhaust(but power increases). UNLESS u change to better exractors. then ull gain power and newtons.

i think there is no point changing the xhaust unless u get the trd full system. it costs like 1.5grand but its engeneereed to be an improvement. the stivo has a damn good xhaust from factory(2 inch) so theres no point changing it to any brand as any bigger would loose torque.

[illuminati]

BTW lucio_libre, ask them what they can do to lower the noise in cabin. i kno that good xhaust shops can put in resonators which lower the noise level in the cabin significantly. when i was inquiring for an exhaust in my vectra they where gonna fit it with a 30" long (not wide) resonator.

[Ilivfor6]

Have looked into the TRD exhaust system and you are looking at considerably more than $1500. That is pretty much what it costs to just land the extractors only and then also adding the muffler takes you out to approx $2500. Then when you add cost of fitment here it's getting pretty damn expensive.

And that's importing it yourself.

Penrith Toyota are asking over $2000 for just the extractors! Ouch :o

[illuminati]

damn! at that price it may even be worth stealing them

that really sux. but thats what happens when they fit a good xhaust from factory, u have to spend big to get a better result.

how much is the trd muffler on its own?

also do u think it would b worth it to just change the extractors and leave the rest stock?

[BigPhil]

Hi Guys,

Bad news if you want to fit the TRD system to the Oz model of the Sportivo :( :(

I bought a Sportivo from Penrith toyota and got a heap of TRD bits fitted when i got it, but cutting to the chase... the TRD rear pipe doesn't fit !!!

They reckon it is because the Oz model has a different rear wheel well, what the ??? Anyway, i now have the TRD headers, but just the standard tailpipe...

But, on a side note, they reckon if i fit a high flow catalytic converter and a new tailpipe i should get around another 15 kw.... so off to do a bit of research... hence my looking in this thread :)

Cheers,

Phil

[lucio_libre]

BTW lucio_libre, ask them what they can do to lower the noise in cabin. i kno that good xhaust shops can put in resonators which lower the noise level in the cabin significantly. when i was inquiring for an exhaust in my vectra they where gonna fit it with a 30" long (not wide) resonator.

The car is alreadt fitted with a 12 inch resonator man, im going back this afternoon to see what he can do, he might be able to fit a wider resonator with more crap inside it, to quieten her down. I must admit, low end doesent feel any different, but top end feels quicker.

[lucio_libre]

Ok. ive got the original one back in, and i am happy about the noise, but i have losta bit of power, particulaly in the top end. I could feel it on the way home, quite a bit of difference, maybe coz of the noise level too. Im going back in friday, he will replace the stock resonator with a different one,maybe put two. They are free flowing so performance should not be affected. All i can say is that the exhaust system is pretty complicated for our cars .

[lucio_libre]

Ohh, i forgot, the stock exhaust is 3 inches coming from the extractors, then after the cat and resonator, it drops to 2.

[xTiGeRx]

Here's the specs of the stock exhaust.

Engine - Cat = Approx 3"

Cat - resonator = Approx 2.5"

Resonator - rear muffler = Approx between 2" - 2 1/4"

Whole system is stainless steel, mandrel bent.

The reason for the 'approx' is because the exhaust is manufactured in Metric, not imperial.

(All this info from a reliable exhaust shop)

This shop doesn't recommend a straight through exhaust as you are getting rid of backpressure, and back pressure is required in N/A cars.

Instead, he recommend that i went with a semi straight through exhaust...basically straight through...with an offset centre. Thus, you'll still getting back pressure.

When i had my straight through..and then changed to what he recommened, i gained over 7kw at the wheels. Of course the stainless steel straight throughs look good..but..don't do job as well. UNLESS of course you have a turbo car. Then you go as high flowing as possible.

And the reason the stock rear muffler is so good, is because it's a semi-free flowing muffler too. during low revs..there's a flap that stays shut..to create back pressure..thus more power/torque down low...

then...during high revs..it'll open up...to allow for a free-flowing effect, thus more power top end ;)

i've spent many a nights researching this...and at the moment..i'm just waiting for something really good to come out..and reasonably priced....

my stainless muffler is sitting in the garage...anyone wanna buy one? ;)

*phew*

m2cw :D

Hope this helps.

[saintz01]

i'm confused. should we or shouldnt we alter the exhaust system at all?

[peekay]

BTW Illuminati I went to 21/4 inches under their recommendation. I will be putting the original exhaust back on. It was their idea in relation to size not mine.

[magic_32]

For what its worth the Trial headers have proven to have more hp/torque then the TRD unit. Check out any US Celica or Matrix forum for reference. They retail for about $750US.

[lucio_libre]

i'm confused. should we or shouldnt we alter the exhaust system at all?

If you start mucking around with the whole exhaust system you must be sure it's in reliable hands. As for the free flowing muffler, you might loose a bit of low end torque, but youre more than likely going to gain some top end power. Since low end torque is low, its not a big loss and its minimal, i couldnt feel it, and youre better off having more top end since our cars are all about top end anyway. But like you i am uncertain as to put the Xforce back on, i mean this guy wants to replace my resonator, and maybe put 2 if needed, so i am confused also . I know i spent 270 so far, maybe i should stop before it gets out of hand...........hmmmm

[lucio_libre]

So maybe BIGGER isn't always better

[Danthuyer]

The extractor is expensive at AUD$1275 plus postage, but it's a bit of a

work of art and has recently been 'redesigned' to produce more power than

the first version.

The muffler is AUD$665 plus postage.

This is from the email from Bruce Sollitt the Asia Pacific rep for TRD. He is currently getting the spec sheet for me of the new extractors.

[peekay]

There is a lot of confusion re the TRD muffler as to which one actually fits the Sportivo I have spoken to Bruce. Apparently Penrith Toyota ordered one in but was the wrong part no. Has anyone ordered the TRD rear muffler from anywhere else and got the corect part no?.

[BigPhil]

Hi Peekay,

Penrith Toyota ordered it for me... and no it didn't fit :(

There are two different part numbers (17400-ZE220 and ZE211) both of which supposedly didn't fit. They idicated that it was due to the deeper spare wheel bay in the OZ model (due to the full-sized alloy spare).

It would be very interesting to hear if anyone else has been able to source a TRD muffler and if so which part number it was...

Cheers,

BigPhil

[saintz01]

QUOTE (saintz01 @ Feb 17 2004, 07:42 AM)

i'm confused. should we or shouldnt we alter the exhaust system at all?

If you start mucking around with the whole exhaust system you must be sure it's in reliable hands. As for the free flowing muffler, you might loose a bit of low end torque, but youre more than likely going to gain some top end power. Since low end torque is low, its not a big loss and its minimal, i couldnt feel it, and youre better off having more top end since our cars are all about top end anyway. But like you i am uncertain as to put the Xforce back on, i mean this guy wants to replace my resonator, and maybe put 2 if needed, so i am confused also . I know i spent 270 so far, maybe i should stop before it gets out of hand...........hmmmm

cheers for the reply. hm, how come you have to worry about the resonator? isnt it possible to just change the muffler alone?

[illuminati]

he did just change the muffler but it was too load and a resonator will lower the noise inside the cabin.

u should also mayb look into a front muffler. it will make it abit quieter but itll still sound nice.