3 inch exhaust on a 2.8

[patrol2.8]

G`day Guys
After searching the forums on the best size exhaust for my 2.8 and talking to various exhaust places i finally went with the 3 inch system custom made with mandrell bends to suit the car and have to say out of all the mods ive done this is the best thing ive done its just transformed the car beyound what i was expecting hills i could only do in low range first are now easily done in second its got more grunt now from a standing start and its definetly using less fuel aswell

[wildgu6]

Nice work fella, what sort of $$$ did it knock ya back, got a 2.8 myself suffers from same prob's you HAD.
What part of Oz you from

[patrol2.8]

G`day wild 98 im from victoria and around the werribee area exhaust cost $690.00 fully fitted

[wildgu6]

Aaah yes Werribee, spent a bit of time there in late teens & hot cars. X Geelong boy.
Not a bad $$$ for the exhaust buddy, is it stainless or mild steel ??

[patrol2.8]

Its mild steel but compared to the mild steel ones on ebay still comming out well on top on price and the difference its made is more than worth the price

[wildgu6]

That's ok for the $$$, you got extractors ??

[YNOT]

That's ok for the $$$, you got extractors ??

Very unlikely, it's a turbo (RD28T).

Tony

[wildgu6]

Very unlikely, it's a turbo (RD28T).

Tony

G'day Tony, good to see ya back mate. Hope you and the familys doing well.

So tell me, diesels and turbos are all relatively new to me, know how to drive em but not a lot more.
Got the RD28Ti myself, do they not make or fit extractors to turbo motors ?? and why ??

[YNOT]

G'day Tony, good to see ya back mate. Hope you and the familys doing well.

So tell me, diesels and turbos are all relatively new to me, know how to drive em but not a lot more.
Got the RD28Ti myself, do they not make or fit extractors to turbo motors ?? and why ??

Thanks mate, still busy but drop in when I can.

You can get extractors/tuned length manifolds for some turbo engines but cast iron manifolds are more robust for off road use.

Tony

[patrol2.8]

I dont have extractors. 3inch is from the manifold and turbo comes on earlier and car seems a smoother. Also did the egr valve and removed the butterfly and added a catch can. EGR and butterfly made a difference but changing the exhaust seems to of made the biggest difference.

[wildgu6]

Top stuff, got that on the bucket list.
The ol 2.8 needs a kick in the pants.
Great to read success stories, well done buddy, go the 2.8s

[patrol2.8]

no worries and i love the ole 2.8 aswell and most people that bag them are the ones that have never owned one

[FullFlxd]

$690 thats a bargain price.

I have a zd30 but still I can't find a price in perth that beats ebay even with postaged included Perth prices are $400 extra. but if anybody knows somewhere where i can get a good custom system made in Perth for les than $800 IM ALL EARS!!

[patrol2.8]

know what you mean about prices in Perth my daughter is in PortHedland and to replace a rear window regulator they have quoted her $360 plus fitting i can get the part down here for 50.00 and fit it myself im going up to see her in about 4 weeks so will fix it then

[YNOT]

G'day Tony, good to see ya back mate. Hope you and the familys doing well.

So tell me, diesels and turbos are all relatively new to me, know how to drive em but not a lot more.
Got the RD28Ti myself, do they not make or fit extractors to turbo motors ?? and why ??

This is an example of extractors for a turbo engine, these are actually genuine Nissan not aftermarket.

Tony

[wildgu6]

Nice one Tony, thanx mate, they look beasty. What sort of $$$ do you know

[Rudda32]

G'day patrol2.8, Can you tell me where in Werribee you had the exhaust done?

[twiggsy]

anyone on the forum know a good place in SA that will do a good price on an exhaust??? also for the 2.8.

[patrol2.8]

No worries had it done at flexi fit
on old geelong rd hoppers crossing

[Rudda32]

Thanks patrol2.8.

[patrol2.8]

Hey Rudda32 it was $660 with out a bung plug the extra $30.00 seemed a bit high for a bung plug but i thought bugger it saved me doing it later and id never done one before but it looks an easy job to do yourself

[wildgu6]

anyone on the forum know a good place in SA that will do a good price on an exhaust??? also for the 2.8.

Hope i dont get black listed posting this.....lol scamed from another site, one of the members is also a member here and is quite knowledgible for a young fella (Nissan kid) Ive also heard deisel exhaust systems do a top job with deisel performance exhausts but not sure on $$$, anyway check this link out: patrol4x4.com/forum/general-patrol-discussion-17/where-get-exhaust-adelaide-60418/

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[patrol2.8]

Upate on exhaust after doing just on 12000 k run the note from the exhaust just got sweeter and the car still surprises me with how it runs

[Timbo]

Yep, the 3" exhaust for the 2.8 is probably the best mod to do (easily).
The next best mod is to get a diesel chip!

[patrol2.8]

Timbo couldnt agree more with you

[MrAz]

Awesome bit of info. Now i know the saving will be well worth it.

[slingshot]

would you have to mod your gearbox if you'd chip a 2.8?

[taslucas]

would you have to mod your gearbox if you'd chip a 2.8?

Nah mate, gearbox is fine. Two mates have the 2.8 and the first (and so far only) mod has been the chip. One mate had it on a switch and he can turn it on or off.

tappa slappn about

[brucemacca]

Just about to buy a 2.8 guys, thanks for all the info - was looking to do the exhaust and a chip, will add the EGR and an EGT to that list as well. Also heard that a thermo fan on the intercooler can help, any thoughts?

[patrol2.8]

the 2.8s have a fan fitted under the intercooler as standard there are 2 plugs conectors to if you unplug the one that connects to the top of the intercooler fan will run all the time

[lufkin]

the 2.8s have a fan fitted under the intercooler as standard there are 2 plugs conectors to if you unplug the one that connects to the top of the intercooler fan will run all the time

doesnt this throw a error up though?

[patrol2.8]

Hasnt on mine from what I can see its a temp sensor the other thing about it is the fan actually draws the air upwards towards the scoop not the other way around

[dannysam84]

gday did u put straight system or use mufflers

[robbo0001]

If the fan draws hot air off the engine, then through the fan and OUT the bonnet scoop...isn't it kinda pointless?
How will this cool the heated air in the intercooler, off the turbo?

Going to check mine tomorrow and have a look.
If it is, I might reverse the positive and negative wires, and get it to go the other way. (if its that easy)

[JoseM]

No , it isnt pointless, on the contrary. First of all, the air temp in the engine bay is always lower than the air pumped by the compressor; also, the air enters the engine bay from the nose of the vehicle, creating a hi pressure zone on the fire wall area, which in turn pushes the air forward and out the scoop, contrary to what logic might tell you, as a matter of fact, if you put the scoop facing towards the windshield, then it will draw air in, if facing fwd then it lets air out. You can tie a string of wool to the scoop and actually see it.

So, having explained that, the fan will actually increase flow through the cooler promoting greater heat exchange, if you do it the other way around, the fan would then be combating the natural flow of air, therefore limiting heat exchange. Hope that answered your question...


If the fan draws hot air off the engine, then through the fan and OUT the bonnet scoop...isn't it kinda pointless?
How will this cool the heated air in the intercooler, off the turbo?

Going to check mine tomorrow and have a look.
If it is, I might reverse the positive and negative wires, and get it to go the other way. (if its that easy)

[patrol2.8]

Danny sam my system is a straight through system.
JoseM I was thinking about reversing my fan aswell but what you say makes sense would it be worth adding another fan to the top of the intercooler so it draws even more air up through it ?

[robbo0001]

Thanks for the explanation JoseM....I had a think about this last night, and sort of came to the same conclusion.
But I was thinking along the lines of "air at high vehicle speed flows through the vehicle grille, over the engine and intercooler, faster than the fan, and may make it redundant. However at low speed, or NO speed, the fan allows some air to be pushed through the intercooler and out the scoop."

[JoseM]

Danny sam my system is a straight through system.
JoseM I was thinking about reversing my fan aswell but what you say makes sense would it be worth adding another fan to the top of the intercooler so it draws even more air up through it ?

Why? Are you having EGT problems? Jus slap on a water injection system, and enjoy the extra hp :bananarock:


Thanks for the explanation JoseM....I had a think about this last night, and sort of came to the same conclusion.
But I was thinking along the lines of "air at high vehicle speed flows through the vehicle grille, over the engine and intercooler, faster than the fan, and may make it redundant. However at low speed, or NO speed, the fan allows some air to be pushed through the intercooler and out the scoop." The fan is always gonna help, if you are moving you have that high pressure area full of not so warm air to blow through your IC increasing heat exchange, if you are not moving you have the fan "sucking" air and generating heat exchange. It works either way. Also, you have that rubber seal around the scoop that prevents what you are referring to...
A buddy of mine took one of windshield watter thingis (sorry, language barrier) and put it up side down, :icon_bonk: so that he can spray watter on the IC, as crazy as it sounds "It works!" :clapping:

[T0nka]

That is dirt cheap!

[brucemacca]

Thanks for this info guys, will be looking to do this to my 2.8. A mate of mine who does exhaust builds recommends a 2 1/2 or 2 3/4 for the 2.8. Any thoughts.

[JoseM]

Thanks for this info guys, will be looking to do this to my 2.8. A mate of mine who does exhaust builds recommends a 2 1/2 or 2 3/4 for the 2.8. Any thoughts.
Your mate is right!

[itchyvet]

G'day Tony, good to see ya back mate. Hope you and the familys doing well.

So tell me, diesels and turbos are all relatively new to me, know how to drive em but not a lot more.
Got the RD28Ti myself, do they not make or fit extractors to turbo motors ?? and why ??

Wild98,
Don't take this the wrong way mate, but seriously, *extractors on a diesel turbo charged engine* ? Clearly, you don't know too much about diesels and turbo charging, good thing you've come here to learn a bit.
I've worked with giant size diesel engine for 30 years, and despite coming across some very interesting systems like two stroke, scavenger blowing, three stroke and four stroke, tubo charged and super charged ect, ect, I'd never ever come across any fitted with extractors.
A diesel engine, especially one fitted with a turbo charger does not need extractors, the turbo does a far better job then they ever could, the turbo also can negate the need for a muffler, as I've done with my 2.8 and it's straight thru exhaust system of 2 1/2".
IMHO, one of the best and easiest mods you can do for your diesel, (especially if turbo'd) is to increase the size of your exhaust, ditch the muffler.(though depends on your state, whether you get away with it, I'm in W.A. and mine passed over the pits no probs)
There is a debate on size of pipes, specialists have told me 2 1/2" is more then adequate, others claim 3" is better, I'm not making any claims as to who is correct, suffice to say, mine runs bloody good enough for me.
I read ana rticle on the web, dealing with this issue, and the *experts* claim such exhausts should only be larger diameter for the first half after the turbo, then reduce for the remainder, apparently it's got something to do with the hot gases needing extra room to flow quickly, then when they cool down they reduce, thus needing less room in the smaller diametre pipe, ensuring a good flow to clear the pipe.
I admit, I've never seen mention of this anywhere, only in the engineering papers, so it would appear the 4WD crowd are unawares of the principles of flowing gases.
Owing the humble 2.8 and driving it with maximum output and minimum fuel useage and minimum SMOKE, being emitted, requires some finess, don't choke the engine, by stomping heavily on the throttle and flooding the engine with diesel that it can't burn, this is a No, No, and wastes expensive fuel, contaminates your sump oil, pollutes the roadways and gets up the nose of your fellow motorists.
Go gently on the Go peddle, only allow enough diesel to increase the revs, as the revs increase, then add on the Go peddle, the engine breathes much easier and actually burns all the diesel your pumping in and gives good power in return.
On my truck, it's neccessary to change the oil every 5,000 K's, even though I've fitted a KLEENOIL bypass filter, though it does stay cleaner longer then it did before.
Watch your radiator additive, make sure it's the proper additive, as using the wrong stuff, will destroy your head,(not kidding with this either) the old green stuff is the WRONG stuff. If you've got the wrong stuff in, flush it out THOROUGHLY, it does NOT mix with the proper stuff and will cause you no end of problems.
Course if you leave the maintenance to your Nissan dealer, you shouldn't have any of these probs, or if you don't intend to keep your Patrol longer then a few years or so, they shouldn't bother you either.
Best of lck mate.

[lufkin]

Itchyvet, could you let me know what coolant you recommend as im about to do a service on mine

[itchyvet]

Hasnt on mine from what I can see its a temp sensor the other thing about it is the fan actually draws the air upwards towards the scoop not the other way around

Um, seriously, if I were you, I'd do some serious checking of my wiring, cause on my 2.8 it sucks it DOWNWARDS.

[itchyvet]

Itchyvet, could you let me know what coolant you recommend as im about to do a service on mine

Luf, give me until tomorrow, getting a four core radiator put in my patrol then, and I'll ask my mechanic the name of the coolant he's using, pass it on to you then.What I do know, is the coolant is a ORGANIC derived, whereas the green stuff is NON ORGANIC, apparently the ORGANIC stuff is supposed to have milder effects on the aluminium components and doesn't cause as much corrosion as the non organic stuff does.
If you buy it direct from Nissan, they sell it already diluted ready to pour straight in, though I do know you can also get it from auto shops, BUT it must be on the label that it's ORGANIC.
My Trol is a 98 model, and parts are getting on a bit now, I reckon all 98 Models, if they haven't yet, should seriously consider changing out their radiator.
Mine passed a flow test without problems, indicating insides were good, but after having a head replaced/6 exhaust valves/head gasket/water pump/thermostat/radiator hoses/radiator cap/overflow tank/header tank, the flamin thing had over heating probs coming back from my last trip.
Cruising on 100 K's towing CT'lr with kayak on roof, no probs until it rained, then the temp guage started to creep up, (weird) rain stopped, temp settled back down, this happened a few times, not happy Jan.
Spoke with my mechanic who agreed only thing could be fault is radiator *externaly*. As if you touch it, bits crumble and fall off easily, it's so weakened and corroded, so guess the fins are not doing what they're supposed to.
Am mightily pissed off with cooling probs on the Patrol, so opted for the FOUR CORE COPPER radiator they put in the Brunswick diesel modifications with their V8's, surely that'll solve the problem once and for all.

[itchyvet]

Itchyvet, could you let me know what coolant you recommend as im about to do a service on mine

Hi lufkin,
As promised, the coolant being used in myPatrol is a POWERUP product called Koolmax 50.
Info I received, advises me it's a localy produced product which originaly started life as ULTRAFLUSH.
I don't know if it can be purchased over the counter, enquiries at auto retailers should resolve that.
I know it's not much, but best I could dig up.
I also discovered, my mechanic only uses KENDAL oils directly imported direct from the U.S. again another product not seen on retailers shelves.

[lufkin]

cheers itchyvet

[patrol2.8]

Um, seriously, if I were you, I'd do some serious checking of my wiring, cause on my 2.8 it sucks it DOWNWARDS.
Ichyvet finished the thermo install today and when refitting the intercooler rechecked and my fan sucks the air down through the scoop now not sure whats happend as it was definatly the otherway around when i posted

[robbo0001]

Definitely pulls air DOWN through the scoop and intercooler on ours. Checked it today.