The Turbocharger Upgrade Faq

[BHDave]

You will need a spacer plate between the exhaust housing and the manifold so that the compressor housing clears the exhaust manifold but thats a PITA and cheap .

my input in bold

And if a 3071 can't fit without a spacer then nothing will. The garrett turbine inlet is smaller than the nissan manifold outlet as mentioned in DP03's post so there is some work involved in matching the 2. Luckily, as you need a spacer you can grind that out and not the turbine housing inlet.

[Wayne_J]

Great post discopotato03.

I'm looking at upgrading my turbo and have had the 3076 recommended to me by one of the better known tuning shops in Sydney.

Edit: fixed speelingk

Edited March 28, 2008 by Wayne_J

[Wayne_J]

I think the concept has merit.............we all get sick of answering the same requests all the time and yes we do get short/abrupt and minimalist.

But what we all have to remember is that we all started in that exact same position years ago ourselves - and short/abrupt and minimalist can be seen as downright rude.

I'm no expert, and I've asked some pretty dumb questions at times, and there has always been somebody there with the patience to help.

And I've stuck to it and learnt as I went along to the point where I can actually now help out at times.......all thanks to SAU [and spending $$ modding my skyline].

As a forum, we don't want to see potential/members disenfranchised or leaving because we fail to answer what may be [to others] a simple question. And that is the danger.........

Very well said.

Sometimes those who have been there and done it all before forget and assume newbies already know what they should be searching for... it is not always obvious at first.

I'm new to turbos, and Skylines for that matter and it can put you off this forum when you read glib replies about using a search engine.

Not that it is unique to this forum of course

[GeeTR]

^^ Its a fine line dude.

I would think, theres almost everything required on this forum to achieve what you want... the delta between taking it to a shop and getting raped, is TIME... Squishy organic human units hate spending time on something, when they could possibly get away with taking a shortcut.

It takes time and lots of $$ to get a great result sometimes, hence why ppl are short or "rude" to those that are inherently lazy.

Anyway, I think all this PC talk is ruining this FAQ thread... course i expect it all to me moderated.. so party on

[Cubes]

GT3071 or GT3076 IW and you really can't go wrong from a bolt on perspective if you are chasing a fairly easy/lazy 270-280rwkw. The GT3076 if you wish to squeeze 300rwkw.

Bolt on a GT35r to the stock manifold is just silly. They don't make more power than the GT30's unless they are paired with nice cams and most importantly a decent exhaust manifold.

Port matching etc goes a long way. A bloke had a GT35r .82 on his rb30det; 270rwkw 17psi. No port matching.

I port matched bolted up a GT3076r .82 and 268rwkw on 15psi. 17psi saw 285rwkw.

So port match port match port match and don't go bigger than a GT3076r on the std exhaust manifold unless you want to accelerate slower to peak power of where u are for a 10th of a second.

[discopotato03]

Very briefly what bolts to RB20/25DET unmodified housing wise .

Obviously the factory Hitachi RB20/RB25/VG30 single type turbochargers .

HKS model specific turbos/kits .

GT25/28 series - GT2530/GT2535/GT-RS .

GT30 series ----- GT2835 Pro S/GT3037 Pro S .

Real type Garrett GT3071R/GT3076R - possibly needing manifold spacer .

Garrett GT3582R - but a bit extreme for 2/2.5L six cylinder powered RWD car .

Note I have only mentioned integral wastegate turbos and in the forms you can buy them as complete .

This is because most people want something they can buy/bolt on relatively easily .

Cheers A .

[Wayne_J]

^^ Its a fine line dude.

I would think, theres almost everything required on this forum to achieve what you want... the delta between taking it to a shop and getting raped, is TIME... Squishy organic human units hate spending time on something, when they could possibly get away with taking a shortcut.

It takes time and lots of $ to get a great result sometimes, hence why ppl are short or "rude" to those that are inherently lazy.

Anyway, I think all this PC talk is ruining this FAQ thread... course i expect it all to me moderated.. so party on

Heh... yeah, I suppose there are too many variables regarding the above topic ^^ .

E.G, I'm not lazy and generally can find almost anything on the net most times, but not always, especially if it's a topic you're not already clued in on.

I've used search here and can find 'answers' to my question but its hard to know if it is the right answer, which is compounded by conflicting answers... blah - just going round in circles here, probably easier to not say anything

[Wayne_J]

GT3071 or GT3076 IW and you really can't go wrong from a bolt on perspective if you are chasing a fairly easy/lazy 270-280rwkw. The GT3076 if you wish to squeeze 300rwkw.

Bolt on a GT35r to the stock manifold is just silly. They don't make more power than the GT30's unless they are paired with nice cams and most importantly a decent exhaust manifold.

Port matching etc goes a long way. A bloke had a GT35r .82 on his rb30det; 270rwkw 17psi. No port matching.

I port matched bolted up a GT3076r .82 and 268rwkw on 15psi. 17psi saw 285rwkw.

So port match port match port match and don't go bigger than a GT3076r on the std exhaust manifold unless you want to accelerate slower to peak power of where u are for a 10th of a second.

Great info Cubes, thanks mate.

It is good to at least have a narrowed down list of turbo options - I was also told the 3076 was good for 260-280rwkw.

Good to see consistant advice, gives me confidence in what to buy.

I must admit I've found this area (turbos) fairly confusing - so many variables and choices, conflicting info, plus its an expensive upgrade so you wanna get it right the first time!

Also will keep in mind the port matching comments as well.

It'd be nice if I could crack 300rwKW though... a nice round figure...

Don't want to stray too far off the topic, but any suggestions on what brand/size injectors, fuel pump & reg to compliment a GT3076 also most welcome

Cheers

[discopotato03]

A matter of opinion but GT3076R's can do better than many give them credit for , don't think that just because some can't get 320Kw + from a 3076R equipt engine that its necessarlity the turbos limitations .

As I mentioned a while back the real GT3071R has seen 440 Hp at the wheels in some apps but I think in single scroll form the turbine housing would need to be big and the power curve too peaky for most people .

I think 280 odd Kw is not unreasonable to expect with Garrett's single scroll 0.63 A/R GT30 turbine housing - even an IW one .

The thing that's impossible for me to predict is what it will feel like on an RB25DET at around town type revs and road speeds .

My best guess (and that's all it is) is that it would feel pretty linear and controllable and hopefully not have that's lets double the engines torque output in 500 revs when it came on boost . All too often that shove in the back characteristic means virtually uncontrollable wheelspin which is not fast , dramatic yes fast no .

A progressive climb into boost would be nice and possibly do a little in the way of hoof balanced traction control .

Anyhow there should be results of such an upgrade soon .

Cheers A .

[EJ]

havent heard to much about gcg's highflow r33 turbo?? any comments?? Iv heard there 2k and rated at 450hp...therefore more then a 3071r and no port matching needed, also maybe more responsive?? and can put out 270rwkws on about 18psi....any 1 back this up? just thought it would be good to look into

[zebra]

There are 11ty Billion threads and posts on GCG's RB25 highflow.

Try the search button

[wolverine]

11ty billion AND one now.

[discopotato03]

The SK R33 cranked out 266Kw with a GCG Hi flow but it also had the larger Z32 300ZX OP6 type turbine housing , also found on some R34 GTt OE turbos . I don't remember the exact figure but the 0P6 turbine housing is supposed to have something like + 20Kw when machined to suit the GCG BB Hi Flows turbine wheel .

That car had porting/cams/better inlet/better IC/fuel system/management .

The big draw with these Hi Flows is that they look absolutely std in situ because externally they ARE std , all the factory heat shields obviously go back in as does all the original oil/water/exhaust/air plumbing bits .

I understand that the "Batamble ?" front exhaust pipe actually bolts up much more easily that the std and aftermarket "dump pipes" because it comes straight out behind the turbo before it ducks down and under . Tight bends straight off the dump flange are a PITA because the lower fasteners are a bitch to get at .

I need an easy solution for my R33 and I have an 0P6 housing so may be a good thing with that front pipe .

A .