Custom exhaust

[emjays Lurker Find all posts View Profile Close emjays]

I see a little on here about exhaust not a lot got a price on a beaudesert exhaust for the 150 it was around 1200 but see some people on here saying its a waste of money and just to replace the center muffler with a straight through muffler so is there a brand you are all doing this with or any old straight through muffler do I don't wanna change the car note just better torque down low for towing so what you got??

[smakb Advanced Member Find all posts View Profile Close smakb]

I have a cheap muffler replacement and I am happy with the results, but a mate has a full 3 inch system. The muffler replacement will help the turbo come in faster and improve fuel economy. Nicer to drive. My mate with the full system gets even better fuel consumption and says that it is much better when towing at speed as it holds the speed better.

IMO, if money is tight or you want to spend money on other areas of your car (like me), just get the muffler done. If you have the money to spend, go the full system.

[D4D Addicted PP Member Find all posts View Profile Close D4D]

Thanks for the tip, I assume the hi-flo muffler only swap would work just as well on a 120 D4D as a 150...

[smakb Advanced Member Find all posts View Profile Close smakb]

They all like to breath better. Muffler helps more with low down, full system is better at top end. Best option is full system and a chip. Can't afford that....

[D4D Addicted PP Member Find all posts View Profile Close D4D]

I don't intend to fit a chip so muffler only works for me

[DSS150 Find all posts View Profile Close DSS150]

I'm also interested what brands of muffler is being used as replacement... I'm sure there are a few options.

Any better than others?

[jss Moderated member Find all posts View Profile Close jss]

Don't forget to get a hi-flow cat as well. I got Lukey a hi-flow sports muffler and a "100 cell" hi-flow cat (anything from 100 to 300 cell would be my advice) and am very happy with the outcome for the $. The cat is actually a bigger choke point than the muffler according to all the exhaust guys I've spoken to.
The 150's apparently have a bit of tight spot where a 3" exhaust can get crushed by the rear diff, so 2.75" is as big as you should go which is bugger all bigger than std 2.5" diameter for the $ it will cost.
$400 should get you a good hi-flow cat and muffler fitted instead of a minimum of $1200 on a full exhaust for the same result. That's 800 clams you can then spend on something else.

If you are going a full exhaust just be careful with some of the cheaper ones you find advertised online as most of the ones I've seen that are under $1000 don't have a cat in the system which makes it illegal (if you care about that sort of stuff).

Cheers
James

[outback7 Banned Find all posts View Profile Close outback7]

Don't forget to get a hi-flow cat as well. I got Lukey a hi-flow sports muffler and a "100 cell" hi-flow cat (anything from 100 to 300 cell would be my advice) and am very happy with the outcome for the $. The cat is actually a bigger choke point than the muffler according to all the exhaust guys I've spoken to.
The 150's apparently have a bit of tight spot where a 3" exhaust can get crushed by the rear diff, so 2.75" is as big as you should go which is bugger all bigger than std 2.5" diameter for the $ it will cost.
$400 should get you a good hi-flow cat and muffler fitted instead of a minimum of $1200 on a full exhaust for the same result. That's 800 clams you can then spend on something else.

If you are going a full exhaust just be careful with some of the cheaper ones you find advertised online as most of the ones I've seen that are under $1000 don't have a cat in the system which makes it illegal (if you care about that sort of stuff).

Cheers
James

Good post.....isn't the Mandel bend the advantage though? going to do something on my 150 not sure how to go about it.

[jss Moderated member Find all posts View Profile Close jss]

Good post.....isn't the Mandel bend the advantage though? going to do something on my 150 not sure how to go about it.

Good question, yes mandrel bends are better, but that fact of the matter is just how much do you want to spend for the extra performance you're going to get. You can spend $400 for 90% of the benefits that you'd get from spending say $1200. So is that last 10% worth the extra $800 when 90% only cost you $400?? My opinion is no it's not worth the extra. You're better off spending that money on something else like a better intercooler, or put it towards a bigger turbo. The hp to $ ratio will be much better than the extra for the full exhaust.
Let's face it an exhaust is at best in a perfect world going to give you maybe at the most 10% more power (but really not even that much) so the extra 10% of that 10% which costs $800 (for the full system as opposed to just cat & muffler) you are likely to be paying $800 for 1 or 2 horsepower, well to me that's just silly when we're not even going to feel that difference in our 2.5 ton daily drivers.

Don't forget with the 3ltr diesel we are talking about a fairly small engine with low power figures, If we were talking about a high performance engine or a "Track car" where every HP is important because every 0.01 second counts then yes you would get a full high performance mandrel bent titanium exhaust from the turbo back, you would also be wrapping your dump pipe and putting a turbo nappy on just to squeeze another hp or 2 on the dyno.
To me it's all about being practical and realistic with dollars V's results and benefits you expect to gain from a small engine.

But hey that's just my opinion on the matter.

p.s. Roo is right is what he says too about the dump pipe (as he usually is) lol.

Cheers
James

[yowie Advanced Member Find all posts View Profile Close yowie]

For my 150 petrol, I had the exhaust replaced back from the cat. conv. with a 2.5 inch stainless system, small muffler, and a small resonator right at the end. Custom made in Sydney for $1,000.

Power is up, put the boot in on the highway and off it goes, also better for towing the van.

[Dcoop27 Lurker Find all posts View Profile Close Dcoop27]

Great info here jss. Like yowie i have a petrol 150, would i also be better to replace the cat and hi flo muff, or the benefit to a petrol is not as much as an oiler.

[outback7 Banned Find all posts View Profile Close outback7]

Here's the thing, Taipan XP have the best dump pipes out in the market place, in my opinion. There flanges are not that good, but when I had my 150, never had a problem going across the Simo and doing 9,000 kms on that trip in 2010.
I had their full high flow system in 3" stainless steel.
Moving on to this year, I have seen a few problems, and heard of a few problems, especially in the 120 models with the XP system.
A lot of members just change out the muffler to a high flow one, but there is still the restriction with the genuine dump pipe.
I reckon a Taipan XP dump pipe with a XP high flow muffler fitted to the genuine system might be the go. This does still give you a restriction at the back of the dump pipe though.
I will do some research and let you know Outback, and other members that
The Roo.

Thanks Roo. Always appreciate your input.

[yowie Advanced Member Find all posts View Profile Close yowie]

Great info here jss. Like yowie i have a petrol 150, would i also be better to replace the cat and hi flo muff, or the benefit to a petrol is not as much as an oiler.

I did not replace the cat. conv. because my son's friend is a mechanic at Toyota, and he advised me to keep the cat. as Toyota would not honour the warranty if there was a problem with the cat. or engine functions, however, the exhaust system change would not be a problem. So any problems would have to be sorted out the supplier/fitter of the cat.

Regardless of that, some have changed the cat. conv. and appear to be happy with the situation.

I do know that with the exhaust change, the acceleration is a bit quicker in my 150, and towing the van is a bit easier on the right foot, except for heading up hills.

[jss Moderated member Find all posts View Profile Close jss]

Great info here jss. Like yowie i have a petrol 150, would i also be better to replace the cat and hi flo muff, or the benefit to a petrol is not as much as an oiler.

All engines like to breath and the better they breath (both good air in and bad air out) they better they run. Petrol engines do require some back pressure which the exhaust provides but i'm no expert and haven't done any research on what exhaust suits them. But if you're not going to do the cat then I'd just be doing muffler only because the std system should be ok with the cat still being the choke point. but that's just my opinion.

I did not replace the cat. conv. because my son's friend is a mechanic at Toyota, and he advised me to keep the cat. as Toyota would not honour the warranty if there was a problem with the cat. or engine functions, however, the exhaust system change would not be a problem. So any problems would have to be sorted out the supplier/fitter of the cat.

Regardless of that, some have changed the cat. conv. and appear to be happy with the situation.

I do know that with the exhaust change, the acceleration is a bit quicker in my 150, and towing the van is a bit easier on the right foot, except for heading up hills.

Really?? they said doing the cat would void your warranty?? I cant see what damage it could do as all it does it trap and burn off toxins in your exhaust gas after it has completely left the engine. All they do is help exhaust gases pass modern day emissions rules.
My Toyo dealer said there was no probs with warranty because I did want to check just to be safe before doing it. Going hi flow air intake/filter can cause warranty issues im told, but not exhaust.

Bloody Toyo dealerships, you can't get the same info from 2 different places lol. One of us was fed some BS I guess.

Roo will probably know the right answer....Roo!! Hello Rooo!! Where are you???

Cheers
James

[yowie Advanced Member Find all posts View Profile Close yowie]

All engines like to breath and the better they breath (both good air in and bad air out) they better they run. Petrol engines do require some back pressure which the exhaust provides but i'm no expert and haven't done any research on what exhaust suits them. But if you're not going to do the cat then I'd just be doing muffler only because the std system should be ok with the cat still being the choke point. but that's just my opinion.



Really?? they said doing the cat would void your warranty?? I cant see what damage it could do as all it does it trap and burn off toxins in your exhaust gas after it has completely left the engine. All they do is help exhaust gases pass modern day emissions rules.
My Toyo dealer said there was no probs with warranty because I did want to check just to be safe before doing it. Going hi flow air intake/filter can cause warranty issues im told, but not exhaust.

Bloody Toyo dealerships, you can't get the same info from 2 different places lol. One of us was fed some BS I guess.

Roo will probably know the right answer....Roo!! Hello Rooo!! Where are you???

Cheers
James

The installer of my exhaust said 3 inches was too big a diameter, and to leave it at 2.5 inch, which I did. Not enough back pressure at 3 inches. He also told me that where the 2 extractors join together, there is a section of metal gauze inside the pipe, so he removed that. I don't know why it is there, and neither did the installer, but he has found it in some exhaust systems.



That's what I was told about the cat., the mechanic is about 30 and has been with Toyota for near 10 years. He said some replacements cats. do not function as well as Toyota originals.

Dave.