Thoughts on GT-SS TURBOS

[discopotato03]

The HKS USA site don't mention it and the other one is in Japanese .

[Steve]

according to this site:

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

the 0.60 is for single SR, 0.42 is RB26 in twin form

they also use differnt size and trim wheels - spose turbos aint turbos

[Banzai Parts Garage]

hi merv tis mark from banzai, don't bother with changing from r34 n1's to gt-ss. the gt-ss use exact same compressor whell as the r34 n1's. i also think the rear wheel is simialar but not too sure if there exactly the same soz. so yer basiclly the r34 n1's will handle as much boost as hks gt-ss but yer all comes down to the rear exhuast wheel. i beleive max most run in japan on the r34 n1's is 1.6bar but yer don't know when it's efficency runs out as havn't seen a compressor map on this compressor. the compressor wheel of the gt-ss is actually abit smaller than a stock s15bb compressor. same size outer diametre but inner diametre is smaller :S the only reason why these are better than the stock s15bb's are because uses a larger inner diametre rear wheel which flows more gas. any ways just some thoughts. give me a ring melv if u want more info will be happy to help

Mark

[discopotato03]

Just another couple of model specific versions of the GT28BB . The SR 20 version looks a bit like a GT28RS with a .64ARR turbine housing and a more OEM style compressor and cover - 60mm 60 trim .60 ARR .

The R34 GTR version looks like a Garrett GTBB effort aimed at quick response , the sort of thing Garrett would have used if they had been fitted std .

If I was doing an SR20 it would wear a GT28RS , I've not had the GTR experience but the majority like GT2530's for twins . If I was starting from nothing with a GTR and wanted twins I would use the GT28RS CHRA with the RB26 specific GT2530 housings . The two are nearly identical CHRA wise though the compressor wheel is a slightly smaller trim (62 vs 63) but the exducer tip height is greater and blade form a slightly later design . What it means is a slight reduction in turbine energy to spin it and slightly greater flow potential .

I'm not a huge fan of HKS turbos because the price they charge for basically re hashed Garrett components .

RPS13 Comp 60 trim 60.1 x 46.6mm ARR .60

turbine 76 trim 53.8 x 47mm ARR .64

BNR34 Comp 62 trim 59.41 x 44.46mm ARR .42

Turbine 62 trim 53.85 x 42.4 ARR .64

[williamsf1]

so why would someone get 2 SR20 GT-SS turbos instead of the packaged GTR GT-SS turbos?

[discopotato03]

$64 question that one . My guess would be they wanted a bit more flow potential particularly on the exhaust side at the expense of some lower mid range . You could look at the applications as a 2000cc 4 cyl compared to a 1285cc 3 cyl by two . Thats why the housing AR Ratios and comp/turbines are different .

Cheers A .

[Mik]

$64 question that one . My guess would be they wanted a bit more flow potential particularly on the exhaust side at the expense of some lower mid range . You could look at the applications as a 2000cc 4 cyl compared to a 1285cc 3 cyl by two . Thats why the housing AR Ratios and comp/turbines are different .

Cheers  A .

The GT-SS I saw with the 0.60A/R comp housings were a kit for a GTR.

[pnblight]

R34N1 turbos

compressor 0.60a/r

47.22mm

turbine 0.64a/r

46.95mm

[williamsf1]

my car with the GTSS turbos is being tuned right now....

[MELV]

i cant belive this thread is still going thats so cool.

i gave up on the GT-SS. I went much larger turbos in the end. i couldnt justify spending so much $$ on little turbos.

if you want instant power and no lag go the GT-SS or just by a V8 and wack a supercharger on it

[Mik]

i cant belive this thread is still going thats so cool.

i gave up on the GT-SS. I went much larger turbos in the end. i couldnt justify spending so much $$ on little turbos.

if you want instant power and no lag go the GT-SS or just by a V8 and wack a supercharger on it

They're not that small

[williamsf1]

and they kick arse!!! just ask morgs!

[Sydneykid]

GT-SS are fitted! and I am now just awaiting the tomei cams which are hopefully here in oz by now also....

SK how is the JD looking?

I missed this post :chairshot

The JD is gooooooooone. :alcoholic

[voona]

I went 2530's. Ill let Yall know

[600hp]

Good stuff, look foward to the results.

[williamsf1]

Sk you need to drive this car!!!!!

[Sydneykid]

Sk you need to drive this car!!!!!

So I take it you are happy :jump:

[williamsf1]

Gary I will be at Oran Park for the racing next weekend (my mate is in the gti again) but no JDs as u didnt place your order!!! morgs got 2 of the WT !!!!

oh yeah so when do you want a drive of this thing???

[voona]

Williams what power did it make ?

Dyno Graph ? Mods ?

Cheers

[Sydneykid]

Gary I will be at Oran Park for the racing next weekend (my mate is in the gti again) but no JDs as u didnt place your order!!! morgs got 2 of the WT !!!!

oh yeah so when do you want a drive of this thing???

For JD or JB, consider the order permanent. The consumption rate is one bottle per race meeting, that's 17 race meetings per year. The boys need a drink, they aren't camels you know. :alcoholic

There is a separate JD budget, otherwise the natives get restless, what no JD :chairshot

Busy week this week, the transporter is due back from Philip Island late tonight. Unpack tomorrow, dif ratio change, gearbox ratio change, engine swap. New ECU so a quick dyno check that the maps upload OK to the new version. Need to finsih revised cold air intake on the other car and then dyno it. Pack transporter Thursday for Oran Park Friday. The #1 mechanic gets back from China Wednesday, so it could be hectic.

Let's talk at Oran Park, I need to drive it as it has similar mods to our new one.