T78 On Internally Standard Rb26

[nisskid]

ok so here's the deal, i bought a car in Japland, R32 GTS-t, has a BNR32 Rb26 in it, and according to auction sheet, a T78 turbo, assuming a 33D going by what they sell. Now internals are unknown, but seeing as nothing was listed, im assuming stock.

My first question is, is there any possible reason i should keep the T78 if i dont plan on fully building the engine? it will be used mostly for drift, so heaps of power isnt really needed hugely, but also some time attack, so extra power would come in handy.

My 2nd is, what kind of turbo from Greddy's lineup would be more suited to my goals of say a reliable 300rwkw, that would fit on the kit these come with (exh. manifold etc)? i'm not a low down torque hunter, so im not interested in chasing that 100rpm of less lag. i just want something that will provide usable power without having to change everything else around.

cheers

[nisskid]

btw, mods:

Trust T78-33D

PowerFC w/Commander

HKS EVC4

Trust Manifold

Trust External Gate

Tomei Type-R Poncam

SARD Injectors

Adjustable type fuel regulator

HKS Pod Filters

Z32 twin AFM's

Trust Intercooler

Trust Oil Cooler

3-Layer Copper Radiator

Low temperature Thermostat

Turbo Back Exhaust

and before anyone asks, these are as detailed as they get for now, going off translated for sale ad.

[paulr33]

it doesnt make sense, you say you want it for drift (small turbo) then you say you want not heaps of power (small turbo) then you say time attack (big turbo) then you say extra power come in handy (big turbo). which one do you want? it would seem odd to fit a T78 to a std engine, you certianly could do it, but why would you bother?

with bog stock everything you would be lucky to tune it at 12psi and not max everything out - aka pointless

wait till the car comes over and then check it out

if its got all the suppporting stuff on it, sell the T78 and get a mid sized hks GT28x/30x series and away you go, even a pair of GT-SS would be fine

but as its already in single mode, its probably cheaper to keep it in single mode

[nisskid]

My 2nd is, what kind of turbo from Greddy's lineup would be more suited to my goals of say a reliable 300rwkw

honestly didnt think it would be that hard to decode roughly what power area i was aiming for lol

i have it here in Japan, unfortunately i dont have the time or tools to do much snooping around on it for a few weeks til im in Osaka where i will have access to some decent shops.

as i mentioned, i would prefer to keep with something that fits the current manifold to make it an easier job, i have nfi what will fit or not (whether it's a universal flange size that HKS shit will fit on etc), i just dont care enough about turbos to carry any knowledge about them haha

[Morgs]

I'm assuming from you post that its not yet in your posession, hence the sort of speculative question?

Throw it on the road..... once you open it up you'll realise that you won't want to replace it with anything else

If insane horsepower isn't quite what you were looking for, you 'll pretty much need to go outside the TRUST stable of turbos to find something suitable. A GT35 would fit the bill in terms of reducing lag and providing similar power levels (though you could consider a GT30 the next size down if need be).

[nisskid]

ahk so are we talking all new kit to switch tables to HKS gear?

i have the car here, have driven it etc, currently running about 0.8bar but that's mainly due to me having nfi how to get the EVC working lol

the other problem is not knowing it's current tune, or model/condition of fuel pump. it's quiet most of the time, only occasionally making a buzz, certainly nothing like what i'd expect from something of a suitable size, the 040 in my 4dr at home is always buzzing in the background of a noticeable noise level.

[Kaido_RR]

Pretty sure Greddy/Trust use a different type of flange than garrett/hks turbos on their manifolds.

If you want 300kw look at the Trust TD06-25g with 10cm rear housing or larger

http://www.trust-power.com/02turbo/turbo_charger.html

edit: found a photo of the design of the turbo; see different style flange

Edited March 9, 2010 by Kaido_RR

[Morgs]

RB26s beg for a big turbo, don't go down the TD route

Silent fuel pump dosen't nessicarily mean isn't a big one - have had dual in-tank pumps or single 044 which when mounted correctly are completely silent.

Your best bet is to get it your nearest Dyno & with all the appropriate gear and see how it goes..... you'll be able to touch up the tune / ensure fuel pressure is appropriate and then have all the fact to be able make a call on if you need to change the setup.

[nisskid]

ahk cheers for the link, interesting.

[Kaido_RR]

RB26s beg for a big turbo, don't go down the TD route

Silent fuel pump dosen't nessicarily mean isn't a big one - have had dual in-tank pumps or single 044 which when mounted correctly are completely silent.

Your best bet is to get it your nearest Dyno & with all the appropriate gear and see how it goes..... you'll be able to touch up the tune / ensure fuel pressure is appropriate and then have all the fact to be able make a call on if you need to change the setup.

i agree,

i don't see why they would be running a t78 with aftermarket injectors but stock pump.

[nisskid]

RB26s beg for a big turbo, don't go down the TD route

Silent fuel pump dosen't nessicarily mean isn't a big one - have had dual in-tank pumps or single 044 which when mounted correctly are completely silent.

Your best bet is to get it your nearest Dyno & with all the appropriate gear and see how it goes..... you'll be able to touch up the tune / ensure fuel pressure is appropriate and then have all the fact to be able make a call on if you need to change the setup.

yeh definitely, unfortunately there is dick all in Nagano as far as car tuning goes so will have to wait for Osaka.

[Harey]

I agree, throw it on the dyno and see how it goes. If it makes good power on the dyno drive it for a while and see what you think. No point spending heaps of cash before you even know what you have.

Please dont get anything smaller than a GT35.

I think you mean 340-350rwkw not just 300

[nisskid]

i agree,

i don't see why they would be running a t78 with aftermarket injectors but stock pump.

yeh but who knows what goes through the mind of Japs though haha

[STATUS]

t78 on a well set up GTR is one of my 1st choices. Drive it before you think about changing it. The fastest circuit car ive been in is the signal R34 with T88 and it was driven to and from the track and used daily.... it all comes down to setup.

[Granthem]

Ive been in a T78 R32 GTR and watched a T78 R33GTR on song... it was love at first sight.

Probably abit laggy for drifting tho.

[Parag0n]

I love my T88, T78 would be good as well.

Open her up on the highway, make sure its not missing and isn't hesitating when you're going WOT.

Also look out for boost creeping / spiking as well, but if you're only running 0.8 bar thats barely getting into the T78.

I'd just take it easy... stock fuel pump is very strange, it may have a sard intank, they are quiet as all hell and a very popular choice with the sort of setup you have.

To be honest i'd just take it easy until you get a dyno run and have a look at how the AFR's are going, also you mentioned you have a power FC with commander? give the car full boot and have a look at the Duty Cycle, you don't want to be going over 85%.

[DVS JEZ]

TO4Z with .7 rear housing Stewy, absolutely great turbo and alot newer design than a 35R etc

[nisskid]

I love my T88, T78 would be good as well.

Open her up on the highway, make sure its not missing and isn't hesitating when you're going WOT.

Also look out for boost creeping / spiking as well, but if you're only running 0.8 bar thats barely getting into the T78.

I'd just take it easy... stock fuel pump is very strange, it may have a sard intank, they are quiet as all hell and a very popular choice with the sort of setup you have.

To be honest i'd just take it easy until you get a dyno run and have a look at how the AFR's are going, also you mentioned you have a power FC with commander? give the car full boot and have a look at the Duty Cycle, you don't want to be going over 85%.

slight hesitation sometimes when it gets to around 6k, but generally pretty smooth. inj duty cycle averages around 75% before i back off, yet to see it break into the 80's

[nisskid]

TO4Z with .7 rear housing Stewy, absolutely great turbo and alot newer design than a 35R etc

ahk will have a suss man, cheers

[unique1]

t78 runs a t4 flange, i run a hks t04z on my trust t78/88 manifold