Outer Limits 4x4 Board

Hey

Will be looking to get a new exhaust for my TD 4.2 GU (99) soon. My mechanic suggested some good power up tips which included a 3" exhaust.

Although I am not ready yet for the other options could I still fit the 3" exhaust and do the other stuff later ie increase boost etc?

Should be no problem. Nice 3" exhaust. If your going to do it. Upgrade the dump pipe to 3" also.

Going to an exhust shop tomorrow morning to get a 3" exhaust organised, will let you know $$ etc tomorrow after I've been there.

Go with the 3inch Dump Pipe at same time .. $200 from beaudesert in Qld for dump only.

Where are you? I had my 3inch done in Lilydale, very happy with it.

Yes you can have the pump timing and dyno work done at a later time..... but do the dump at same time as pipe.
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Go with 3inch.. you can go with muffler or without... nice whistle without one

Thanks all.

I am in Brissie. What sort of $$ could I expect for the exhaust? Will the shop also fit the dump pipe?

Wilko76 wrote:Thanks all.

I am in Brissie. What sort of $$ could I expect for the exhaust? Will the shop also fit the dump pipe?

exhaust, some say $500, upto $1100 for std exhaust tube - stainless much more

yes they can fit the dump...

Wilko76 wrote:Thanks all.

I am in Brissie. What sort of $$ could I expect for the exhaust? Will the shop also fit the dump pipe?

Rob Bliss at Geebung, did my 2.8, 3" Dump & Mandrel Exhaust, 3" Flex Pipe, no muffler $800.

thanks. No muffler... silly question but is that legal ie emmissions etc?

I hear beaudesert exhausts are good. Is there much different from one place to the next for exhausts or is it just price?

the turbine wheel acts like a muffler in the turbo, still without muffler will be fairly loud and only give you minimal extra grunt. Also muffler does nothing for emissions so yes its legal to run without one, noise limit is 93 db from memory but im if you do any serious road kays the noise drives you nuts. The wife will always think there is somthing wrong with the car too. I paid $800 for a 3" mild steel mandrel bent system last year. I ended up with a resonator a cat and a muffler on my RB-30 petrol turbo GQ.

my 3" finishes about 18" past cab on single cab gq with a slash cut tip pointing at the ground hits 107db at 3800 the noise is not that much more noticable without muffler just whisles a bit louder

I dropped into rob bliss at Geebung. quoted me a good price to fit the 3" exhaust and dump pipe.
He said there was no need for the flex joint as he has fitted hundreds without and had no drama.

Will let you know how i go once fitted. Keen to see if there is a difference.

Put the flex in as your exhuast will last longer and it will reduce stress on exhuast manifold turbo etc. For the cost it is a cheap way to protect the manifold if nothing else.
My exhuast (VH45 not TD42) has flexi and is then solid mounted to the floor. It is a comp truck but still it doesn't make any noise that can be heard over 4" exhuast.

nzdarin wrote:Put the flex in as your exhuast will last longer and it will reduce stress on exhuast manifold turbo etc. For the cost it is a cheap way to protect the manifold if nothing else.

X2

big exhuast always gives the biggest amount of power over anything else you can do to a motor.

a motor is nothing more than a hair drier, suck in heaps of cold air, heat it up and chuck out the hot air.

The more cold air you can suck into an engine and then push out of an engine will give you the most power, chips and stuff can only do so much at the end of the day.

though I do wonder why only a 3inch exhuast wouldn't the stock exhuast be 2.5inch already?

I would disagree Zagan, we have dynoed a few vehicles before and after fitting an exhaust system, some have made more power, some dont. But in the essence of doing a power up, then exhaust, upping the boost and fuel delivery all go hand in hand.

In saying that we have made a td42t gu go from 85rwkw with a 3" exhaust to 130 rwkw, just by changing the turbo and altering fuel. This is much higher than just adding an exhaust.

The secret to making power on a diesel is to put in lots of cold air and get rid of it, then adjsut fuel to balance it out. Then you will have power to burn.


Andy

thx all. so the questions is flex joint or no flex joint.