Is this too small a turbo

[MyGQ]

Ok guys worked out my last prob it looks like

now its time to turbo the old girl.

I have a turbo with the following specs

Model no: GT28 ( ball bearing)
comp wheel major diameter ( outlet exducer):60.1
comp wheel minor diameter (outlet inducer): 46.5
Trim(comp): 59.68
Exhaust wheel majorr diameter ( inlet inducer): 53.2
Exhaust wheel minor diameter: 41.8
Trim (exhaust): 61.73
Comp A/R:0.6
TURBINE A/R:0.64

I have have a TD42 patrol and am looking not for major performance, jsut better towing capabilities and to run 35's

If this is too small, can someone recommend a better turbo?

[vn15]

Ok guys worked out my last prob it looks like

now its time to turbo the old girl.

I have a turbo with the following specs

Model no: GT28 ( ball bearing)
comp wheel major diameter ( outlet exducer):60.1
comp wheel minor diameter (outlet inducer): 46.5
Trim(comp): 59.68
Exhaust wheel majorr diameter ( inlet inducer): 53.2
Exhaust wheel minor diameter: 41.8
Trim (exhaust): 61.73
Comp A/R:0.6
TURBINE A/R:0.64

I have have a TD42 patrol and am looking not for major performance, jsut better towing capabilities and to run 35's

If this is too small, can someone recommend a better turbo?

I think the turbo is too small for a TD42, this one would be ok on a RD28T rather than TD42.

This turbo would boost from idle and create too much back pressure higher up in the rev range - leading to high egt.

Buy a GT2871R.64AR instead.

Have a GT2871R.86 on my modified RD28T.
Have big pump, zorst, fmic, water injection, lpg etc.... alot of mods but still only 2.8 l engine. boost starts at 1600 rpm, 0.5 bar at 2000rpm. and 1.3 bar at 2800rpm.

[PGS 4WD]

It'll work, expect it to be finished by 3000 rpm and don't expect 30 psi, up to 15 psi it will be very responsive. MTQ Adelaide have a swank adapter from t3 to T28 mounting flange adapter.

Joel

[MyGQ]

i only want 10 PSI and i want it slow in the rev range

[hokey]

Model no: GT28 ( ball bearing)
comp wheel major diameter ( outlet exducer):60.1
comp wheel minor diameter (outlet inducer): 46.5
Trim(comp): 59.68
Exhaust wheel majorr diameter ( inlet inducer): 53.2
Exhaust wheel minor diameter: 41.8
Trim (exhaust): 61.73
Comp A/R:0.6
TURBINE A/R:0.64

How do you take these measurements? i've just bought a t3 off an rb25det and i was thinking it looks a bit small. i was looking around for specs on the net for the standard rb25 turbo but google didn't really come up with the goods after a quick look.

If anyone knows specs or if it suits that'd be sweet.
-Calvin
EDIT: forgot to ad its for a TB42

[chunderlicious]

n a TB42 you will need a minimum or a GT30...35 being best suited especially on gas.

the skyline turbo is pretty small .52 compressor and 62 exhaust i believe, with a 60 aprox. trim. skyline turbo would be too small for a td42 aswell. im currently looking for a turbo for my TD 42 and RB25 turbos are so available so cheap im thinking of getting one and changing the compressor and highflowing the exhaust to make it suitable. this would however make it more expensive.

however twin turbo TD42 with twin t25s from a skyline might be fun? or twin t28s on a TB42 would be even better.

on the TD42 turbo, has anyone found a turbo that produces good boost from 1200 and keeps pumping to redline?

[hokey]

the skyline turbo's aren't t25's, they are on the ca18det and redtop sr's. the skyline one is a nissan copy of garrett t3 and i was told is the biggest of the t3 range?

[RN]

I have a TB42 and have been the all clear for this fairly cheap second hand turbo.. Hitachi 18 S - 2S off a Mazda rotary

Not after anything high up the rev range just boost from low to mid range. 6 to 7 PSI would be OK.

[hokey]

Yeh i have access to one of those but you have to muck around with manifolds. with a t3 you can just buy a diesel manifold and you're away.

I have heard the hitachi's are farily well sized though.

[chunderlicious]

the skyline turbo's aren't t25's, they are on the ca18det and redtop sr's. the skyline one is a nissan copy of garrett t3 and i was told is the biggest of the t3 range?

I know they are a t3 but they are similar in size to a t28 or a garrett GT2530.

although a rotary is only 1.3 litres they have more airflow and stuff than a piston engine of much larger size..... find the specs of the turbo, it might be well sized but it might be abit too small.


"Mazda and Hitachi jointly developed the HT18S-2S Twin Scroll turbocharger for the 13B Turbo. This new turbocharger was designed to have virtually no " turbo lag " by having a flap that varies ( vacuum operated @ above 2500rpm ) depending on the load that opens wider during heavy load to have greater throuput and torque band. The turbo had two exhaust intakes into the turbine, the turbo acted as two turbos, by having both of advantages of small and big turbos, giving fast low end torque response and high end power. The turbine side was water cooled where the main body was cooled by a dual-ski heat shield."

[Andrew_C]

The guys above seem to be side tracked - Its for a TD42.
Anyway I have a small GT25 on my GU, seems to work pretty good for what I use it for with heaps of torque and boost down low. Admittedly it looses a bit at the top but I seldom take it over 3000 rpm anyway where fuel starts to run out. Stock as a rock NA motor gets 85kw at the wheels.

[hokey]

I just bought this back to life so to not start a new thread. original question is from september and i'm asking about my tb42

[oondy]

I used a GT2860RS with 0.64 Turbine housing on my GQ TD42. RUn about 12PSI, TMIC coming at the end of the week.

No complaints what so ever here. I don't realy think it dies over 3000RPM Either, the power, or seat of the pants feel, tapering off after here, is the same as the NA TD42 engines do anyway. It pulls alot harder to the redline now than it did before.

When I sink my boot in I get full boost about 1800RPM. Still get about 12L/100km on the highway too from 90-110kph.

go for it.

cheers

OONDY

[MyGQ]

Thanks for that Guys

Ok here is another question

I have a GT28 turbo and a T3 High Mount Manifold, Going to mod the manifold with T3 to T2 adapter plate so if i want to upgrade down the track its possible

Now i am going High mount, does the turbo need any special modifications to become high mount? or does its just plug in and go.

do i need to rotate any housings or that? cause i have no idea on that part

[sloshy]

RB25 turbos are so available so cheap im thinking of getting one and changing the compressor and highflowing the exhaust to make it suitable. this would however make it more expensive.

Just go twin standard rb25 turbo's

[chunderlicious]

all i can think of is the oil drain line which has to be lower than the input obviously and rotating the turbo would root that round???

[purplebus]

i have a 4.2 diesel put a gu 3lt turbo on it against peoples advice and absolutly luved it . instant boost from idle but ran out at about 3500 rpm. it lasted about 4 months before its first long drive and exploded 3/4 of the way to cruiser park. new motor after getting it back on road for another 3 month. now run a stock 4.2d gu turbo and early gu pump(you will get more out of a later pump) and a front mount. couldnt be happier. reliable and enough snot for me. DO IT RIGHT THE FIRST TIME. was stripping the first turbo off in the carpark of the kilcoy meatworks with the help of 30000000000 angry flies. nearly burnt the truck and am still finding flies in places i didnt know i had. good luck.

[MyGQ]

all i can think of is the oil drain line which has to be lower than the input obviously and rotating the turbo would root that round???

Looking at it there is 2 oil ports on it, one has a thing you can bolt a special pipe onto, the other side has a threaded end. if i mount it in high mount the threaded end is at the bottom of the turbo and the other part is at the top

what i want to know is, does it matter what way the oil goes in, i know its gotta go in the top and out the bottom to allow it to drain, but does it need to be a specific way? do i have to rotate teh middle section so the threaded end is up the top and the big hole is down the bottom? cause its just bolted together, looks like you could do it if needed

[Zac Zec]

those rotary turbos are the go. I use one on a tb42. Hi-flowed and runs 15-16 psi. They are tough. can handle massive egt coming off a rotary. Basically bullet proof but they do only run a 270deg thrust washer.

[bogged]

Thanks for that Guys

Ok here is another question

I have a GT28 turbo and a T3 High Mount Manifold, Going to mod the manifold with T3 to T2 adapter plate so if i want to upgrade down the track its possible

Now i am going High mount, does the turbo need any special modifications to become high mount? or does its just plug in and go.

do i need to rotate any housings or that? cause i have no idea on that part

high mounts suck if you want to go top mount ICooler... Thats the failing with the denco kit..

[MyGQ]

high mounts suck if you want to go top mount ICooler... Thats the failing with the denco kit..

not worried about that part, just want to make sure i plug up the oil lines right and don't kill the car

[oondy]

Just mount the turbo on the manifold, then rotate the core so that the oil inlet is plumb on top, and then the drain will be on the bottom, then rotate the compressor cover to where you want it. easy as, just be wary of how the boost actuator bracket lines up.

cheers

OONDY

[PGS 4WD]

If using the GT28R make sure you get a JIC fitting for the oil supply as it locates the roller bearing cage and the turbo will fail if you dont.


Joel

[MyGQ]

Just mount the turbo on the manifold, then rotate the core so that the oil inlet is plumb on top, and then the drain will be on the bottom, then rotate the compressor cover to where you want it. easy as, just be wary of how the boost actuator bracket lines up.

cheers

OONDY

thanks mate, thought it might be jsut that simple