I'm from Geelong to mate and have been doin some research into that as well. The cheapest i've found was $220, through to $295. They are all cast ones. I'm gonna make my own out of 3" mandrel pipe i think. Thats all my brother had on his old Subaru Forrester GT Turbo, and that made a HUGE difference.

 

Ok, just decided against makeing a dump pipe. Just bought one off Ebay through Denco for $165. Bugger makeing it for that price. They have 5 (well, 4 now) if anyone else is interested.

 

once you get your dump pipe you will see what i mean about being hard to make, it's not as easy as you think

 

I'm what you would call... uneducated in the ways of turbos. What is a dump pipe used for and what do they look like?

 

Just for information, I have just ordered a complete 3" system incl Dump Pipe from Beaudesert Exhausts. Will keep you all posted with results when fitted.

http://www.geocities.com/tonyhefford2000/safari1.html

 

I'm what you would call... uneducated in the ways of turbos. What is a dump pipe used for and what do they look like?

the dump pipe is the elbow that come out of the back of the turbo. one end of the dump pipe bolts to the back of the turbo, and one end goes onto your exhaust pipe. the standard dump pipe has an inside diameter of 1.7", the aftermarket ones range from 2.5-3" ID

p.s. this isn't a patrol turbo or dump pipe, just an example of what they are. this one is obviesly home made

 

for even more performance you could get one custom made like this.

the smaller pipe is for the wastgate gases, this works better as ther is no turbulence inside the dump pipe when the wastegate and main exhaust gases meet.

if you really want to turn some heads, instead of making the smaller pipe meet back into the main pipe, just let the wastegate gases release into the atmosphere, this is called a screamer. like in this photo, the big pipe is for the main gases, and the smaller pipe is the screamer (they dont have to be two pieces by the way, this was all i could find)

 

that threaded bung, is that for a pyro/egt guage sender? I want to fit EGT/boost etc so i can keep an eye on things, but I want to buy a dump pipe that has this fitting, instead of having to drill, weld etc.

Where may I buy one of these dump pipes for a 3.0TD?

 

If you buy a system off Brian at Beaudesert Exhaust Center his dump pipes come with the threaded bung you are speaking of for the pyrometer.

 

what size exhaust would be suited to the 3lt t/d patrol while keeping in mind the back pressure issues etc. ( If there are any)

 

Brian at Beaudesert Exhausts suggests the three inch with 1 high flow cat and muffler or no muffler he does not care. He can make the system so the muffler can be bolted on or off as the driver wishes.The actual dump pipe starts at 2 3/4 inch and expands quickly to 3 inch.Some people will tell you no cat is required but in my opinion it is a big gamble to take to go without a cat.Brian also freights his product anywhere in Australia.

 

Well, we fitted the dump pipe to the patrol. Gotta say, i'm disappointed. Before the pipe was on, in 3rd it'd crack 10psi at 2000rpm (just), now its barely getting 8psi. It pulls worse down low in the rev range, and i'm basically regretting spending the money to get one so far. Doesnt go better up in the rev range either. Changing to thermo fans from the standard clutch fan gave me a much more noticeable result than this bloody thing.

 

Well, we fitted the dump pipe to the patrol. Gotta say, i'm disappointed. Before the pipe was on, in 3rd it'd crack 10psi at 2000rpm (just), now its barely getting 8psi. It pulls worse down low in the rev range, and i'm basically regretting spending the money to get one so far. Doesnt go better up in the rev range either. Changing to thermo fans from the standard clutch fan gave me a much more noticeable result than this bloody thing.

did you try to up the fuel pressure a tiny bit ,but i am surprised your boost dropped maybe there is something else possibly blocking the exaust

 

Well, we fitted the dump pipe to the patrol. Gotta say, i'm disappointed. Before the pipe was on, in 3rd it'd crack 10psi at 2000rpm (just), now its barely getting 8psi. It pulls worse down low in the rev range, and i'm basically regretting spending the money to get one so far. Doesnt go better up in the rev range either. Changing to thermo fans from the standard clutch fan gave me a much more noticeable result than this bloody thing.

Well you do get what you pay for!

 

for even more performance you could get one custom made like this.

the smaller pipe is for the wastgate gases, this works better as ther is no turbulence inside the dump pipe when the wastegate and main exhaust gases meet.

if you really want to turn some heads, instead of making the smaller pipe meet back into the main pipe, just let the wastegate gases release into the atmosphere, this is called a screamer. like in this photo, the big pipe is for the main gases, and the smaller pipe is the screamer (they dont have to be two pieces by the way, this was all i could find)

well only if it was legal to have your screamer pipe go into the atmosphere and not back into the exhaust, be better if you had a external wastegate as well, then you will be able to control your boost a lot better, pretty fun on a petrol but not so much on a diesel

 

I paid for a cast 3" dump pipe, from Denco in NSW. It was identical to the cast 3" dump pipe MTQ wanted to sell me for $275, and identical to the other one some dyno place out nth melbourne wanted to sell me for $295. Wild guess here, they came from the same casting. But please, if you think i got ripped off and want to go pay the extra $100. I wont stop you mate . As for upping the fuel pressure a bit, how do i know what its currently set to? How do i know its right now? How do i know what i'm setting it too? I'd rather not take the chance i dont think . I guess i'll just live with what i've got untill i have the spare cash to get the pump setup to the correct settings at the local diesel injection place.

 

Oh, forgot to mention that i put the muffler back on (its on flanges). That seems to have made it a bit better strangely. I guess the bit of back-pressure the straight-through muffler gives helps? Buggered if i know, boost is basically back to where it was before. Only difference is i can hear the turbo still, whereas prior to fitting the dump pipe i couldnt. Cant says i'm not happy to be able to hear that

 

I paid for a cast 3" dump pipe, from Denco in NSW. It was identical to the cast 3" dump pipe MTQ wanted to sell me for $275, and identical to the other one some dyno place out nth melbourne wanted to sell me for $295. Wild guess here, they came from the same casting. But please, if you think i got ripped off and want to go pay the extra $100. I wont stop you mate . As for upping the fuel pressure a bit, how do i know what its currently set to? How do i know its right now? How do i know what i'm setting it too? I'd rather not take the chance i dont think . I guess i'll just live with what i've got untill i have the spare cash to get the pump setup to the correct settings at the local diesel injection place.

that would be the safest option to have it set up on a dyno by a mechanic
the only thing i can think of with loosing boost is with the original dump pipe it was more restrictive and not letting the gasses out of the waste gate fast enough hence building a little more boost. and with the new dump pipe it is more free flowing letting the gasses out the waste gate easier hense letting the actuator for the waste gate work at its specified pressure
fuel delivery directly affects the amount of boost you can achieve more fuel the more boost you can get in saying that you also need a boost controler to bypass the actuator for the waste gate otherwise it wouldnt mater how much fuel you dumped into it you would only get as much boost as the waste gate actuator would allow

hope i didnt dribble on too much

 

Its a 4.2 mechanically injected engine. Get your pump re-tuned properly and you will notice the difference.

Its not nicely electronic and capable of re-tuning itself like those lovely 3.0l TD engines, hey, me thinks I own one of those.....

 

Yeah i'm planning on getting it done by a local bloke we dealt with for years when we had our truck repair business. I spoke to him about the whole dyno thing, and well, this is a family forum and i wont say his response. He rang a guy he knows in NSW from a large diesel place who do alot of dyno tuning, and when asked what they did in the "tuning" process, his reply was "not much". So i'm gonna take the pump off myself, then take it to him to get checked/rebuilt/reset/etc, whatever it needs. Probably get the injectors done at the same time, its done 168,000k's so that wouldnt hurt i guess Bloody expensive, but hey, it'll apparantly make a big difference (although, the dump pipe was sposed to do that too hehe, ah i'll win one day)

 

To have your pump tuned it sould cost you around $200 for the bench test and tune, and approx $275 for the company to remove and refit the pump.
( do the remove and refit yourself if you can ) Much more than that and you are getting ripped.

 

Shame you don't live in Brisbane. The guy who does my truck has been doing this stuff for 12 years and he retunes by going to his favorite big hill and does it all by feel. He has the same opinion of Dynos, they work but....

 

$200? wow, i got quoted $450 and that was alledgedly "mates rates" (that was for a rebuild and reset though, something about new seals/o-rings or something that dont like the new low-sulphur fuel). We victorians get ripped off with everything dont we?

 

if the dump pipe did nothing, then somethings wrong somewhere, im sorry to say you must be the ONLY sole human being that didn't get a performance difference from adding the dump pipe

 

Oh i did get a performance difference, it was just the wrong way hehe I'm more than willing to hear ideas on what the "somethings wrong somewhere" might be too. As i said before, now with the muffler back on its roughly the same as it was prior to the dump pipe goin on. But theres definately been no improvement on what it already was. Dont get me wrong, i was really happy with the way it went before. But after reading what everyone on here said about dump pipes and how much better it was with them installed, i was a bit ticked off to not feel this difference. But, **** happens