Will HKS 2530 give me 250rwkw

[turbomad]

INASNT check out www.horsepowerinabox.com, they make adaptors to fit a GT28 to a R33 which according to them is a great turbo for the RB25 as it makes good power down low and up high, the GT30 has the right flange(T3) but is a little laggy.

[Steve]

-i have heard that the 2540's on a GTR dont run aswell as 2530 for overall response etc!

wondering if it will be the same as for the gts-t!!

may have something to do with GTRs using 2 turbos, not 1.

-Hasent whatshisname got around 250rwkw with only 13psi?? whats he using

I believe he is using a GCG highflow, not 100% though

-Well Andrew did 280kW with stock internals...

you must consider boost pressure as well. the more pressure the more heat = detonation. With a bigger turbo will flow more air at less pressure therefore less prone to detonation and safer for your engine with the same output.

I tend to agree with turbomad, if you are after 250rwkw, perhaps look at the GT28, or GCG do a good highflow - just ask whatsisname.

[jtir]

Originally posted by INASNT

my aim is for 250rwkw with a low mount turbo. If not the 2530 or 2540 then what will do it?

I'm sure a HKS GT-RS turbo will reach that 250rwkw goal of yours.

http://www.hks-power.co.jp/products/turbo/.../gtrs/gtrs.html

I believe it is capable of 260rwkw at 1.4 bar (this is on a SR20DET, should be more on a RB25DET) but with the responsiveness of a GT2530 but more power than teh GT2450.

[Guest INASNT]

turbomad

the turbos at horsepowerinabox are the same price for 400hp to 700hp system!! wtf?

jtir

does the gt-rs series fit the stock manifold??

is it really worth changing the stock manifold to a stainless steel aftermarket one? is it that restrictive?

[EnricoPalazzo]

Whatisname is making 257kws atws

Not sure on boost or turbo.

Pm him.

[predator]

The HKS RS models are the new ones. They're meant to better, but the costs will be very high. You're probably not going to find a 2nd hand one around.

[jtir]

Originally posted by INASNT

turbomad

the turbos at horsepowerinabox are the same price for 400hp to 700hp system!! wtf?

jtir

does the gt-rs series fit the stock manifold??

is it really worth changing the stock manifold to a stainless steel aftermarket one? is it that restrictive?

The GT-RS uses a T25 flange which will bolt directly on a SR20DET. Not sure if they are available with T3 flange, but it can't be that hard to fabricate one.

[rev210]

250kw = 335hp . This is about what the 2530 flows at the motor (a little less maybe). The 2540 is actually 340/50hp at the motor and the 2540R is reputed to flow 400HP.

Hence getting two 2530's on a GTR is said to be able to produce somewhere around 600HP @ the motor.

No one is going to argue that the stock gtst turbo is higher flowing than a 2530, in the real world it means that its about 30-40hp better than the stockie (that folks is at the motor).

Inasnt,

Flow 250kw at motor I'm sure.

250kw at the back tyres? Sure why not! Why it will even do 500rwkw if you photoshop the printout.

[Guest INASNT]

Originally posted by rev210

250kw = 335hp . This is about what the 2530 flows at the motor (a little less maybe). The 2540 is actually 340/50hp at the motor and the 2540R is reputed to flow 400HP.

Hence getting two 2530's on a GTR is said to be able to produce somewhere around 600HP @ the motor.

No one is going to argue that the stock gtst turbo  is higher flowing than a 2530, in the real world it means that its about 30-40hp better than the stockie (that folks is at the motor).

Inasnt, 

Flow 250kw at motor I'm sure. 

250kw at the back tyres? Sure why not! Why it will  even do 500rwkw if you photoshop the printout.

yes the 2530 might not have enough puff to pull 250rwkw without running really high boost! And hks power figures are always quotes about 10% less than actual anyway.

Looks like i might get a 2540, all depends on next week tho

[turbomad]

I've heard the 2540 have miss matched comp/exh housings or something, do a search maybe it's on the NZ site. If you must go HKS what about the 2835? I think the 2540 might be stretching it's legs at 250rwkw.

[mr180]

Either the 2530 or the 2540 will do quite nicely if you want something to bolt onto the stock manifold.

Zoom had a series of articles covering the build up of an RB20 R31 wagon, which ended up getting a 240rwkw @ 1.1bar with a 2530. So with the boost controller set on high to 1.5bar, the turbo would be running in it's efficiency range and you would hope it would produce more power!

[whatsisname]

My turbo is a plain bearing T3/T4 built by Precision Turbochargers, based on spec's recommended by Vince Rigoli. Nothing to do with GCG @ all.

I know the T3/T4 term doesn't narrow things down too much but as I've posted a few times in the past I don't know the full spec's? It's NOT a high flow standard turbo, it's much larger than stock. They used new housings (much larger than stock!) back cut the exhaust wheel, & used a TO4E or T04B compressor wheel (not sure which?) 0.64 A/R. It bolts to the standard manifold (T3 flange) & uses an internal wastegate.

On the Tilbrook dyno it made 257rwkw on 13psi after tuning by MR HPI himself Martin Donnon. Prior to the this tuning it had made 244rwkw. On another dyno it made 236rwkw after the initial Microtech tuning, but it had a few less mod's at this stage.

At the end of the day the rwkw fig's are just a rough guide, I've heard of cars with less power than mine (according to dyno fig's) go quicker down the 1/4. Power curve is the key here! A driver who can helps too

If I had the $$$ I'd be getting the HKS GT-RS without a doubt!

Cheers

[ice180]

I'd say you would be pushing it with a 2530 maybe with a power fc prop tuned no way with the s-afc . mona's car which had 2530, HKS front mount, z32 afm, 550cc injectors and some kind of chipped ecu think mines made 240rwkw on the race pace dyno think at 1.3 bar maybe could go to 1.5 max and was running way to rich. I'd say be close to the limits though dude. Awesome turbo though esp for drift. 2540 a lot laggier..

her car was a beast on the road kept up with stockish GTR's no prob had a lot of traction issues on 16 inch rims tho. and it was farken loud.

also will need decent zorst, dump, front pipe hi flow cat etc.

Dun forget to bend over for the EPA heheheh

[Guest INASNT]

thanks whatisname.

how did u get recommendations from vince rigoli??

what ball park figure are we looking at here to get a system custom made like yours?? is your car very streetable?

[Guest INASNT]

Originally posted by ice180

I'd say you would be pushing it with a 2530 maybe with a power fc prop tuned no way with the s-afc .  mona's car which had 2530, HKS front mount, z32 afm, 550cc injectors and some kind of chipped ecu think mines made 240rwkw on the race pace dyno think at 1.3 bar maybe could go to 1.5 max and was running way to rich.  I'd say be close to the limits though dude.  Awesome turbo though esp for drift.  2540 a lot laggier.. 

her car was a beast on the road kept up with stockish GTR's no prob had a lot of traction issues on 16 inch rims tho.  and it was farken loud. 

also will need decent zorst, dump, front pipe hi flow cat etc. 

Dun forget to bend over for the EPA heheheh

fark the epa, like i care what those greenies think!

now i am even more confussed!!

[ice180]

fark u know u want a T66 hehhee.

I think it will be pushing a 2530 to get that power so you will need a 2540 min. You want to keep the stock turbo mounting possie to hide it after all the recent crack downs.

richie

[whatsisname]

Originally posted by INASNT

thanks whatisname.

how did u get recommendations from vince rigoli?? 

what ball park figure are we looking at here to get a system custom made like yours?? is your car very streetable?

When I was looking at getting a turbo upgrade (over 2yrs ago) I rang lots of places asking for info & prices (including GCG) I didn't know much about turbos (still don't). I basically just asked for a decent turbo that would make good power, not too much lag & on lowish boost (14-16psi). Vince just said "yep no prob's this is what we'll do" & gave me a very decent price too! He told me that lag would be up to 500rpm-1000rpm more than the stock item & he was pretty much right! I also remember him saying the turbo was good for 18psi.

I only wish I'd written down all the spec's of the turbo He did show me the 2 side by side (my old stockie vs new) Quite a difference in size!

Check your PM for more info mate.

The car is very streetable providing it has good tyres. Crap tyres ='s w/spin till 80-100km/h.

If I were you I'd look into the HKS GT-RS. The main advantage with this option is you're getting a turbo that is proven to flow XXXhp & with the latest turbo design technology will have very good response. Don't get me wrong, I love my turbo, for the price it has been fantastic, but with more $$$ I'd love a HKS GT-RS.

[whatsisname]

My turbo -

[Sydneykid]

Hi Guys, we have an RB25DET that at 1.2 bar makes 240 rwkw or 320 rwhp or 300 kw or 400 bhp (whatever way you want to express it). It did a 12.4 at Eastern Creek with standard weight.

It has a GCG Turbos hi flowed, standard RB25DET turbo. They put new bearings in it, new shaft, new seals, new turbine, new compressor, machined the compressor housing and the turbine housing and micro balanced the rotating bits. This means it it basically a new turbo since all of the wearing bits are new or machined to new specs. Cost was less than $1800.

Since it was the turbo off the car, it fitted back on without any mods, the oil, water, inlet, outlet, exhaust, all fitted straight up, no fabrication required at all. Car is a daily driver, sees the occasional track (drag and circuit) has been this way for over 18 months no problems.

We also have a GCG hi flowed turbo on our R32 GTST circuit race car and have had no problems with it either and it works real hard.

I have had used HKS turbos but they always end up costing more, by the time you add up the fabrication and farting around to make them fit. Second hand turbos are a gamble, some you win, some you loose. Take the gamble away by having them serviced and the cost ends up way more than having your standard turbo hi flowed.

I have never seen any proof that a HKS turbo is worth twice as much as the Garrett that it is based on. Super secret internals and undisclosed aerodynamic advances are worthless to me. I need to be able to choose the right turbo for the application and I need a compressor flow map to do that and HKS don't supply them.

Hope that raving made some sense.

[predator]

I think if you had one custom designed you could get some good figures, and they can build it more to the exact specs you'd want for say low down or mid range, etc. In conjunction with some good cams/gear you can probably get as much out out of a bitsa turbo than many off the shelf ones, if not more so because you can specify exactly what you're after.

The key problem is reliability though. I think the key is just to get somebody really good to do it - or at least throw in a guarantee of some type. I've heard of many hiflow units going ka-put after only a few weeks or months. If you're paying $1.5k - $3k you want it done well and something that is going to last.