Which Turbo?

[Fujiwara]

Chasing more power with my car.

Have decided on everything except the turbo.

Options are to hi-flow the turbo, or to get a new turbo that will be a DIRECT BOLT ON REPLACEMENT for the car.

Chasing around 300rwkw.

Do not want a massive turbo that will increase lag. Want a very responsive turbo...but one that doesn't drop off in boost near the top of the rev range.

So...which turbo will be a direct bolt on and fit my requirements?

It is for a engine with stock internals.

And one more question....if i get a turbo with a external wastegate, how much extra am i looking to spend? I would like one to be internally gated if possible.

Please recommend me some good turbos and rough price.

Cheers

[Adriano]

There is no such thing, i would recommend reading the rb25 dyno results thread at the top of the page, or do a search, as posting a new question all the time that has been answered many times before will not win you any friends

[R33GOD]

if your chasing a turbo for 300rwk and minimal lag, you gotta go for something alot bigger than a hiflow. set yourself a realistic goal and go for 260 rwk. that youl do on a hiflow and still retain minimal lag, and a longer engine life with stock internals

good luck

[Fujiwara]

There is no such thing, i would recommend reading the rb25 dyno results thread at the top of the page, or do a search, as posting a new question all the time that has been answered many times before will not win you any friends

I have searched but in the posts it doesn't say if it was a direct bolt on

But i know what u mean...

if your chasing a turbo for 300rwk and minimal lag, you gotta go for something alot bigger than a hiflow. set yourself a realistic goal and go for 260 rwk. that youl do on a hiflow and still retain minimal lag, and a longer engine life with stock internals

good luck

Which turbo do you mean by bigger? And thats why i am deciding on going a replacement turbo.

I think the GT35 is ok, but as i said...dunno if it is a direct replacement.

Edited July 12, 2007 by Fujiwara

[R31Nismoid]

Pretty much covered in your other thread dude.

Good response/power can be had with 260rwkw and thats a hi-flow or HKS GT-RS or similar other brand names. Then you gotta step up frame of turbo etc.

Thats increased lag and so on for more power.

As we covered in the other thread aswell, 300rwkw is pushing the stock motor as it is.

Anything around the 300rwkw mark generally means it not bolt on either as you cant make massive power out of a peep-hole turbo, your forced to get a decent sized one.

A GT35 is well above 300rwkw aswell, closer to 330-350rwkw range and is most certainly not bolt on

Not trying to sound rude, but the other thread had a lot of useful info you dont seem to have taken onboard

[Tangles]

Talk to Slide here on the forums about a turbo, I love his highflow

fkn awesome turbo.

whats the deal with 300rwkw with everyone these days ?? cant use it on the road so tell me JUST what is the point ?

240rwkw is just fine, surely, with a nice highflow at 1.1bar, piggyback ecus, fpr, z32, zuast and air, cam gears etc.

get a bit of boost into it and you're already over the legal speed limit.

want a bit more then add some cams, injectors, full replacement ecu etc

no point in going overboard...... its just a car.

[Beer Baron]

no chance of a direct bolt on 300rwkw. well you could do it, but it wont be a nice set-up.

if you want 300rwkw bear in mind you need a lot of other bits too.

decent front mount (not cheap rubbish ones)

550cc injectors or bigger

high volume fuel pump

bigger afm is advisable too

strong clutch

good tyres

good brakes

and this is just the basics, there are lots of other desirable bits to have too with that kind of power.

but if it were me, and I wanted a 300rwkw R34 GTT I would get:

HKS 3037S 0.73 A/R

HKS GT-II 60mm wastegate

custom steampipe manifold (6boost ones are very nice)

that will give you 300rwkw and be on 1.5 bar boost around 4000rpm.

[moonus]

if theres anything that ive learned, its that a quick street car doesnt have to have huge max power, but rather good, average power. Therefore, on the street a 250rwk gts-t with a highflow, or a GTRS or something similar is going to be more responsive than a laggy 300rwk equivalent. Your not going to use 300rws on the street. I say for the street, even the basic mods with standard turbo, such as ECU, exhuast, 12psi of boost and a good intercooler is enough. If anything dont compromise response for max power.

Edited July 13, 2007 by moonus

[Beer Baron]

I can tell you a 3037s 0.73 AR on a RB25 Neo is not laggy at all. I reckon it's the gun choice for a stock engine RB25.

[tridentt150v]

I'd probably opt for its smaller cousin the HKS2835proS. Sort of wish I'd brought one now.

But either one you can't go wrong.

[Fujiwara]

cool. thanks guys.

And Nismoid...just wanted to know which turbos offer the same power as a hiflow.

Just to check price differences.

[sloutch]

Like what nismoid said, 300rwkw on the RB25DET is really pushing it. I'm also looking at upgrading the stock turbo. From what i gather, 300rwkw is pretty much more suited for hardcore track racing, if you're using it on the streets majority of the time, i would get something responsive eg. HKS Gtrs , 2835, etc.

[Bunta]

I can tell you a 3037s 0.73 AR on a RB25 Neo is not laggy at all. I reckon it's the gun choice for a stock engine RB25.

I agree, even the .82 isnt too bad lag wise mine made 303rwkw at 18psi and is not noticeably worse on response than the Apexi AX53B70 I had

[The Dan]

1.a new turbo that will be a DIRECT BOLT ON REPLACEMENT for the car.

2.Chasing around 300rwkw.

3.Do not want a massive turbo that will increase lag.

4.Want a very responsive turbo

5.one that doesn't drop off in boost near the top of the rev range.

hahahahah!

1 and 2 cancel each other out.

2 contradicts 3

4 cancels out 5

That would be the perfect turbo. I mean, it has it all. Early boost, no lag, big power right to past redline.

I'll take 6 if you can find one...I don't even care how much they are.

[Fujiwara]

hehe.

well, have to ring up a few places and get some info on

HKS GT2535

HKS GT2835ProS

HKS GTRS

Garrett GT3040R-IW

If only BD4's workshop was still open...

Edited July 16, 2007 by Fujiwara

[N I B]

Many R34 HKS Turbo kits come with thick head gaskets now and this is highly recommended.

[Lithium]

I still reckon from how my GT3076R drives that a bolt on GT3037 from HKS will meet most of those requirements. They will pull hard to redline, have excellent response, make good power, and have an awesome midrange whack.

If I did it all again, I'd not go smaller than a GT2835/GT3071R but not go bigger than a .82a/r GT3076R.

[Fujiwara]

meh...

just found out the the GTRS comes with a GT25 inlet flange....but i need it to be a T3 flange.

Probably have to clear it up with BD4's on Monday.

[Adriano]

I think they are available in both bolt pattern, otherwise you can just redrill you manifold

[Lithium]

I think they are available in both bolt pattern, otherwise you can just redrill you manifold

You can definitely get them in T3 flange for Skylines as well...