Which Turbo

[Wogan]

Hi all,

Just wondering what turbo would suit my needs.

I'm after a replacement turbo for my rb20det to run around 16 to 18 psi. I'd prefer for it to not be too laggy, but i also would like it to be able to maintain this boost at the high end rpm.

What turbos would fit this description and how much would i be looking at to purchase them?

[InterCooL]

try stating this in power output terms, as different pressure's on different setups with different turbos yeild different results

also tell us your budget and supporting mods

[Wogan]

currently i've got:

apexi pod filter, greddy fmic, gtr fuel pump, 3" turbo back exhaust, and remapped chip.

not particularly sure what hp i'm looking for. Just more . probably only have about 200 now, so 250+ would be nice.

I don't quite understand why the same pressure at the same rpm can give different results from different turbos... maybe i'm thinking about it too simplistically.

Budget is probably 1500 or so. but if possible i'd like to spend less (as most people would)

edit: (oh and thank you )

Edited April 29, 2008 by Wogan

[NYTSKY]

HKS 2540

[R31Nismoid]

2530!!! Not the 2540, its a shocker.

Its either 2530 or the bigger 2835

[InterCooL]

i'm sure you can find in the power upgrade thread someone running a large turbo at 12-14 psi making bucket loads more power than people running stock turbos at 12-14psi on the rb20det

does your buget of $1500 include installation, oil / water line modifications, exhaust and / or intercooler pipe modifications? do you have the stock manifold?

$1500 will be enough to get a turbo, but not enough for a drive in / out conversion. even a gcg high flow requires some sort of oil line modifications, don't they?

and as r31nismoid said, do not touch a 2540.

[Wogan]

what about an rb25 turbo? are they a direct replacement? Obviously i wouldn't be looking at the same sort of power output, but i have seen some for pretty cheap.

I've got the stock manifold on at the moment, but do have a stainless hi-mount manifold that i may use, depending on how crazy i go with the spending.

my budget is kinda a money over time thing.. i've got about a thousand to spend on the car per month. I have about 1500 at the moment for the turbo itself.

[cactus]

Get a series 2 RB25 turbo ... i had one on my red top rb20 @ 12psi making 247rwhp. with the money you save you can get an SAFCII or something

[esky_mad]

GT3040 hehe.....

for good cheap useable power the RB25 turbo or VG30 turbos are hard to go past.

[abu]

HKS2535 is also a good turbo

[InterCooL]

if you can save $1k per month, then don't upgrade to an rb25 turbo. wait a while and get something brand new and good. guess you'll have to do your own research for what turbo will meet your demands, how much power, how much lag and how much fiddlying around

[cosmokram3r]

Even have a look at this thread http://www.skylinesaustralia.com/forums/Rb...0+turbo+upgrade All the setup's and dyno sheets there as well so a good example of what you could get and how much power it would produce at what RPM

[SKYPER]

From what I understand you have to know 2 things when selecting a turbo -

1.) Application (racecar, streetcar, dragcar, targa, etc)

2.) HP you want from engine

For example with application -

Street - short runner exhaust manifold, small turbo, small A/R exhaust housing, etc for low to mid boost response but lose peak hp (factory car).

Racetrack - long runner manifold, bigger turbo, bigger A/R exhaust housing, etc for more mid to peak hp but lose boost response.

That's why some have 2 different engines with 2 different turbo's for racetrack, dragracing. Garage Saurus would probably be a good example with their R32 GTR that has a 9 sec drag engine + turbo setup and racecar engine + turbo setup.

Edited April 30, 2008 by SKYPER