IS a T72 too much for my rb20det?

[FlyingStroke240]

First of all, i have couple questions.

This is The setup I'm planning on running.


Greddy intake manifold
Q45 throttle body
SS Turbo manifold.
Front mount intercooler.
Deutsch 440cc injectors
walbro 255
Fuel pressure regulator.
Every single pipe will be 3 inch.


Converted from MAF to MAP for better tuning.


Now i need to choose a turbo. I'm looking for at least 300-350hp on stock internals. what would be the best turbo for me? Does a T72 bolt up to a t3/t4 manifold? or do i need a T4 turbo manifold?
I'm not really sure what turbo i should use. I need some advice.

c'mon people... i need your help.

[Cash]

You need bigger injectors than 440cc if you want over 300whp. A T72 is huge. Why don't you get something like the 20g or 2871r? What manifold do you have now? What flange?

What are you going to be using your car for? A T72 will take a long time to spool up. You can get a smaller turbo that will spool faster and make the 300-350hp you're looking for.

Check out these threads from Dave:
http://240atlanta.com/forums/showthread.php?t=4261

http://240atlanta.com/forums/showthread.php?t=4607

http://240atlanta.com/forums/showthread.php?t=4606

[Wedge]

First of all, i have couple questions.

This is The setup I'm planning on running.


Greddy intake manifold
Q45 throttle body
SS Turbo manifold.
Front mount intercooler.
Deutsch 440cc injectors
walbro 255
Fuel pressure regulator.
Every single pipe will be 3 inch.


Converted from MAF to MAP for better tuning.


Now i need to choose a turbo. I'm looking for at least 300-350hp on stock internals. what would be the best turbo for me? Does a T72 bolt up to a t3/t4 manifold? or do i need a T4 turbo manifold?
I'm not really sure what turbo i should use. I need some advice.

c'mon people... i need your help.

A T72 is a T4 flange and way too much turbo for your goals.

[Casey]

hmm
3071
and some 6xx or 7xx injectors for more than 400 hp

t3 flange is good :)
and you can get that power without going topmount ... so 2876 would work aswell....
the 30 is a topmount and t3

t2 is for the 28 and will bolt up to stock manifold

[Lone_Wolf]

i thought rb's had t3 turbos

[Broke240]

T72 is way too big for just 300-350whp. I say just go with a 30R or even a good t3/t4 set-up will do.

[Cash]

T72 is good for 18-wheeler. haha

[FlyingStroke240]

There is a lot of t3/t4 out there. Speaking of t3/t4 exactly what size do i need with this kind of setup? i don't want something that spools too late or start spooling hot air from certain rpm. I'm just kind of really cautious. I'm using a Top mount manifold just for the hell of it.

i want to stay around $500.00 for the turbo.

[Cash]

haha, check ebay.


if you are wanting to get a good turbo for around $500 i hope you're planning on buying used. you MIGHT be able to find a gt28rs for that. or maybe an s15 spec r t28.

[FlyingStroke240]

is the gt28rs same as the rb25 turbo? T28?

[Cash]

i don't think so. check google.

Edit: This is what I found with a quick search.

"The Garrett T3-based turbocharger from Nissan***8217;s RB25DET engine is one of the biggest OE Japanese turbos you can buy. They***8217;re also relatively easy to find because they***8217;re factory fitment to the ever-popular R33 Skyline GTS25T.

One of the biggest attractions of this turbo is its sophisticated design ***8211; it uses a water-cooled core with a roller bearing, ceramic turbine and lightweight compressor. These factors contribute to a very fast spool-up time.

In standard form, the RB25DET engine generates 187kW and we have seen the standard turbo pushed to around 250kW in some applications. At this output, however, the ceramic turbine is likely to fail ***8211; especially when held at high load for extended durations.

The RB25DET turbocharger employs a 60mm compressor inlet and a 38mm discharge nozzle. The compressor housing is identified with a 0.40 A/R. On the exhaust side, the turbine inlet passage is 65 x 45mm and the mounting flange measures 110 x 70mm. The turbo connects to the exhaust manifold with 4 bolts and the dump pipe is attached by 6 bolts.

This is a great turbo for any engine making less than 250kW. "


oh btw, 250kw is about 335hp.

[FlyingStroke240]

^^^That just helped a lot...

[Cash]

cool. that was just from a quick search. you can find a lot more if you spend a little more time looking for it.

[Broke240]

As far as t3/t4 turbos go, you would want maybe a 50 trim. That will not spool too late and if you get a small a/r you can get it to spool faster. A 50 trim with a .48 a/r should easily make 300-350hp and with a pretty quick spool.

[FlyingStroke240]

As far as t3/t4 turbos go, you would want maybe a 50 trim. That will not spool too late and if you get a small a/r you can get it to spool faster. A 50 trim with a .48 a/r should easily make 300-350hp and with a pretty quick spool.

thanks.


i don't think so. check google.

Edit: This is what I found with a quick search.

"The Garrett T3-based turbocharger from Nissan’s RB25DET engine is one of the biggest OE Japanese turbos you can buy. They’re also relatively easy to find because they’re factory fitment to the ever-popular R33 Skyline GTS25T.

One of the biggest attractions of this turbo is its sophisticated design – it uses a water-cooled core with a roller bearing, ceramic turbine and lightweight compressor. These factors contribute to a very fast spool-up time.

In standard form, the RB25DET engine generates 187kW and we have seen the standard turbo pushed to around 250kW in some applications. At this output, however, the ceramic turbine is likely to fail – especially when held at high load for extended durations.

The RB25DET turbocharger employs a 60mm compressor inlet and a 38mm discharge nozzle. The compressor housing is identified with a 0.40 A/R. On the exhaust side, the turbine inlet passage is 65 x 45mm and the mounting flange measures 110 x 70mm. The turbo connects to the exhaust manifold with 4 bolts and the dump pipe is attached by 6 bolts.

This is a great turbo for any engine making less than 250kW. "


oh btw, 250kw is about 335hp.

So does it mean that i can use the t28 for the kind of power goals that i'm looking for?

[Lone_Wolf]

no b/c you have a t3 flange.

[FlyingStroke240]

no b/c you have a t3 flange.

now i'm just lost. Even the t3/t4 turbo use a T3 flange. so what is your point?

[Broke240]

Get a t3 manifold. Problem solved.

[FlyingStroke240]

Get a t3 manifold. Problem solved.

so get a T3 manifold and use an rb25det stock turbo?

[MOOREOFSTEPHEN]

WOw... a T72?

Can a jet air plane spool that bad boy? lol

[Broke240]

I wouldn't get the rb25 turbo just because of the ceramic turbine. With high boost it is a good chance that it will break.

[FlyingStroke240]

WOw... a T72?

Can a jet air plane spool that bad boy? lol

i hope so.


I wouldn't get the rb25 turbo just because of the ceramic turbine. With high boost it is a good chance that it will break.

Ok cool. so what about a T3/t4 top mount turbo manifold with a Garrett t3/t4 60-1 turbo? what do you think? A turbo like this one?
http://www.importatlanta.com/forums/showthread.php?t=140843

[Broke240]

That turbo is not bad. May still be a little big for your goals, but definately a better choice than a T72.

Just make sure if you buy used you know what you are buying, you don't want to buy something with too many miles on it.

[Cash]

i would say for you it seems as though you may want to save up a little longer, then take your car to a reputable shop and tell them your power goals and your budget and let them do the rest. they'll make sure you get the right turbo for your goals and application. everything will work together. and get a good tune.

i don't mean to sound rude or insulting at all, but it sounds as though you may not be knowledgeable enough to do this all on your own. i'm not saying I know a whole lot either, but it just seems like you're lost on even some of the most basic stuff.

Do some research, read about different turbos, find out what setups other people with rb20's have and what numbers they're making, etc.
This is a great website: http://auto.howstuffworks.com/
I've used that website to get explanations about many things automotive that i was unclear on.

good luck!

[MOOREOFSTEPHEN]

I have a T3/To4e still for sale. If you care I have an old subject on it here somewhere on the site.

[FlyingStroke240]

i would say for you it seems as though you may want to save up a little longer, then take your car to a reputable shop and tell them your power goals and your budget and let them do the rest. they'll make sure you get the right turbo for your goals and application. everything will work together. and get a good tune.

i don't mean to sound rude or insulting at all, but it sounds as though you may not be knowledgeable enough to do this all on your own. i'm not saying I know a whole lot either, but it just seems like you're lost on even some of the most basic stuff.

Do some research, read about different turbos, find out what setups other people with rb20's have and what numbers they're making, etc.
This is a great website: http://auto.howstuffworks.com/
I've used that website to get explanations about many things automotive that i was unclear on.

good luck!

Thanks, the website helped a lot. I used to have a T3/t4 but it was a no brand turbo. It did the job fine but this time, i want to go with something more specialized. I got most of the stuff, i just want a perfect turbo. that's all it is.


I have a T3/To4e still for sale. If you care I have an old subject on it here somewhere on the site.

yeah sure, u got a link to it?

[DAsquintz]

i dont they are....i was talking about the gt28rs and the t28

[v-empire]

There is a lot of t3/t4 out there. Speaking of t3/t4 exactly what size do i need with this kind of setup? i don't want something that spools too late or start spooling hot air from certain rpm. I'm just kind of really cautious. I'm using a Top mount manifold just for the hell of it.

i want to stay around $500.00 for the turbo.

oh wow.....

this home made turbo 240sx should be interesting.


the thing i would spend my money on, is a turbo. you can be frugal and save on other items, but spend your money on a turbo and ecu.

t3/t04e garrett ball bearings are nice turbos. i bought that used for 500 bucks. but it was a temporary purchase, i didnt plan on keeping the car.
had it on an s14 sr i had, and made over 400 whp daily drive. 26 mpg never had a problem until i sold it to a kid and he crashed it and broke his GF's nose.

you want it to spool faster, and you are asking about a t72??? :thinking:

good luck, and take pics.. would like to see the out come.

[FlyingStroke240]

^^^.I sent u a pm

[hellfire]

Ok, I think you are confused about Flange's.

SR- T2.
RBxx- T3.

A GT28, T28, etc won't fit on your stock mani.

The RB25 Turbo will fit, and you can probably make 300ish on it. But, it has a cermaic turbine, and blows after prolonged use at high boost.

You need something small, with quick response. You can hit 300HP easy, with quick spool it will be one fun car. You don't need 600hp to have a fun car. In fact, it would probably be LESS fun of a car.

T72, oh my.. And if you were to go something as large as that, you might as well just go GT42. The T series is outdated. GT series flows better, spools just as quick, and makes more power.

Tyler

[FlyingStroke240]

Ok, I think you are confused about Flange's.

SR- T2.
RBxx- T3.

A GT28, T28, etc won't fit on your stock mani.

The RB25 Turbo will fit, and you can probably make 300ish on it. But, it has a cermaic turbine, and blows after prolonged use at high boost.

You need something small, with quick response. You can hit 300HP easy, with quick spool it will be one fun car. You don't need 600hp to have a fun car. In fact, it would probably be LESS fun of a car.

T72, oh my.. And if you were to go something as large as that, you might as well just go GT42. The T series is outdated. GT series flows better, spools just as quick, and makes more power.

Tyler


i thought the t28 is an rb25det turbo and is usually an upgrade for the rb20 if u don't have much money to spend.I also think that they just the t28 just bolt on. doesn't it?

[Cash]

No, he said RB's are T3 flanges. That means you can't use a T2x turbo. That includes a T28 on your stock manifold. That also means the RB25 turbo is a T3 flange turbo.

[FlyingStroke240]

This is really dumb. But can you put an rb25 turbo on an rb20 without any modification?

[hellfire]

Yes.

Tyler