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Exhaust question

Tech Talk for Nissan owners.

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Exhaust question

Post by Wilko76 »

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?
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Post by turps »

Should be no problem. Nice 3" exhaust. If your going to do it. Upgrade the dump pipe to 3" also.
THOUGHT FOR THE DAY....
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Post by beretta »

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

Post by bogged »

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.
.
Go with 3inch.. you can go with muffler or without... nice whistle without one :)
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Post by Wilko76 »

Thanks all.

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

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...
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Post by HARMZ »

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.
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Post by Wilko76 »

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?
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muffler

Post by Brunsy »

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.
GU TB45 tractor
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Post by nastytroll »

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
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Post by Wilko76 »

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.
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Post by nzdarin »

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.
93 Nissan Pathfinder / Terrano Turboed VH45, GQ Trans and T-case, coil overs, hydraulic winch and fair bit of other stuff. (Currently a pile of parts in the workshop)
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Post by azzad »

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
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Post by zagan »

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?
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Post by Dzltec »

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
www.diesel-tec.com.au Ph 03 9739 5031
Ball bearing turbo upgrades for factory turbo vehicles. Got a diesel question just ask.
Home of the twin turbo shorty and many 150rwkw+ patrols.
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Post by Wilko76 »

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