Outer Limits 4x4 Board

just wondering the best place to buy a gt2876r ,there are cheap non garrett items in the states but id rather get the garrett item does any body have any ideas cheers mick

johno88 wrote:http://www.horsepowerinabox.com/HPIAB2/category12_1.htm

Thats a pretty good price!! I havent seen them under $1400 before (not that i've really been looking)

horspowerinabox, tweakit or mtq. 1700 to 1800 cheaper if you now people who know people

got mine for 1250

after much reading and talking am now looking at the gt2860rs thanks for the replys

care to tell us why you changed your mind mate?

i say go for the middle road and get a gt2871r

I'd like to upgrade from my DTS Mitsubishi TD05 eventually, so am also interested in these GT28 choices.

With no knowledge of turbos at all, I'd probably lean towards the smaller GT2860 for my low boost daily driver usage, where I'd like more pull before the approx. 2000rpm that the TD05 seems to pull from.

Zoltan's looks/sounds great, but I want better performance below 2000rpm, without having to run massive boost and wanting to redline it all the time like you would in a comp truck, so maybe a smaller and faster spooling turbo like the 2860 would be better for my use, I really don't know.

i thought the same simon,

Then i put the 2876r on my car.

Full boost in even 1st gear.

Boost starts to rise at 1000rpm and maxes out depending on load and throttle use at around 2500

Would it start to boost as much down low with more daily driver friendly overall boost, you run it pretty high don't you?

Boost is constant relative to fuel setting.

My max boost setting has nothing to do with how quick the boost comes in.

Fuel and load governs boost rise.

More fuel = denser exhaust = More mass/energy = higher energy transferred to turbine fins = faster boost rise.

Load in a diesel engine will cause the governor to open more and flow more fuel thus increasing the above.

Understandably with all this fueling going on you'll need the boost to go with it.

You can tune it all relative to the output/range you want the car to adhere to.

i just dont have the need for big boost ,after reading a lot lately on the 2860 [disco potato]it seems this is the unit that could best suit my needs if i doesnt i can always sell it and go bigger but at the moment im heading down this path be it right or wrong!!

The 2876 and the 2860 are both the same but the 2876 can output more if you want it to.

For the same price you can get the 2876, then when/if you want more power its just a matter of adding more fuel and boost.


Each to their own...

Wrong.
The 2876 had a 76mm compressor wheel, 4" inlet.
The 2860 has a 60mm comp wheel and 3" inlet. Compressor maps are different. The only things the same are exhaust housing and turbine wheel.

Both also flow different amounts of air and have different sweet spots in there compressor map.

Andy

Seeing as how we are on the subject...

If the 2876 under load (full noise) starts rissing at 1000rpm. What rpm will the 2860 (disco patato) start at?

And what boost pressure and rpm will it comfortably make?

Im also wondering if running lpg on this turbo (with intercooler) would be worth it. Or will the lpg be a waste of time and money for the extra hp?

put 2860rs on mine last weekend replaced the tdo5 mitsu dts turbo. boost from idle, set at 12 psi get 12psi in 1st, 2nd gear -something the tdo5 never did, it was poo- was also set to 12 psi but it just took forever to build up boost, i dont rev the tits off my car and like the low down go it has now. nice quick install- water lines(larger 1 extended 400mm) were reused and fittings straight into new turbo, 1 new inverted flare to sae fitting for oil inlet, outlet reused, adapter and new dump= done. has a wicked whistle at idle now too. the turbo is boosting under light acceleration eg chugging out of your driveway, i have also lost any smoke it used to have cos the boost is there instantly not excess fuel trying to spool up a slug of a turbo, the tdo5 is now the doorstop to the laundry.......

Dzltec wrote:Wrong.
The 2876 had a 76mm compressor wheel, 4" inlet.
The 2860 has a 60mm comp wheel and 3" inlet. Compressor maps are different. The only things the same are exhaust housing and turbine wheel.

Both also flow different amounts of air and have different sweet spots in there compressor map.

Andy

I thought that could be left unsaid...

The turbine side of the turbo has the most to do with as you say 'sweet spot'

On a 4.2L diesel the 76 and 60 will be much the same. The 76 though will boost quicker and longer if you wish. Its all about rotational ratios.

My point being, why get a 60, that is just good enough when you could get a 76 for the same price?

Ive had enough of trying to convince people about turbo choices... make your own decision. If you need help to make your decision take a look at my videos on youtube and you can be the judge..

Afaik the smaller 60 housing will allow the turbo to produce more boost pressure than a 70/76 etc for a given turbine rpm (=given exhaust pressure)?

maby up around the 70-80 psi mark

Z()LTAN wrote:maby up around the 70-80 psi mark

oh ok.

is there a difference in fuel efficiency with the 60 and 76. as said earlier they are the same except for you can tweak the 76 more.
so what is the difference like in fuel efficiency between running low boost like 5 psi and running a higher boost like 15 psi??

Depends if you have a boost compensator fitted and at what pressure the 2nd stage kicks in.

Running FI as opposed to NA on a diesel will put it under more load so the governor will put in more fuel, but only for a short time as you find you get to your desired speed alot quicker instead of lugging to it.

Most people find a increase in fuel economy with a turbo fitted or a better turbo fitted to an existing setup. This is not always the case though... People looking for power as opposed to driveability find they use more fuel.

Allthough you can find a happy medium.

where can you buy a 76 for the same price as a 60??????

hmmm no response ????must be a hard question

id say he knows people that know some people that know some..........

i know a person
who works for someone
who gets their parts from someone
who sells them to me

Show an invoice, only way to prove it.


Andy

nope just like everything else on an online forum, your just going to have to take my word for it with no evidence.

Anyone on here running the gt2860rs on their cruiser? I'm looking at going the garret road and wondering how much better this would be over standard ct26.