Boosting RB26DETT

[Nismo32R]

Currently my car is running a max boost of 1.3bar and i would like to boost it to 1.5bar....

i'm just wondering would a RB26 with stock internal hold 1.5bar of boost to make it around 300 to 320 rwkw????

thanks

[pnblight]

wot other mods does the car have and wot turbos are you trying this with?

[Leewah]

Say bye bye to your stock turbos if you still have them. The ceramic wheels will have a fit and create nothing short of a supernova under your bonnet.

Just out of curiosity, how long have your run your car on 1.3 bar with stockies?

[ferni]

At a guess i'd say he's not running stock turbos...

The Rb26 Internals usually can cope with the 320rwkw you want... as Leewah said the stock turbos/fuel system is what struggles

If you've upgraded injectors/turbos and usually ECU, a good tuner should be able to get you well over 300rwkw - Go see Racepace.

[Leewah]

Or bring it to Ice Performance

Details in the sig.

[GTR-Ben]

Well over 300rwkw should be possible with the right tuner/mods.

Stock bottom end is strong if your kind to it.

[Nismo32R]

i picked up my car from workshop in March, but i hardly push it as my girl will konck on my head if i do so...anyway, i have following mod on my car:

PowerFC,

HKS GT-SS,

HKS 600cc Injectors,

HKS Type-R Intercooler,

Nismo Fuel Pump,

Sard Fuel Regulator,

Tomei Cam Gears,

and other pieces...

all i'm worried about is internal, dont know if it will hold that sort of boost pressure and power or not.

[pnblight]

i picked up my car from workshop in March, but i hardly push it as my girl will konck on my head if i do so....anyway, i have following mod on my car:

PowerFC,

HKS GT-SS,

HKS 600cc Injectors,

HKS Type-R Intercooler,

Nismo Fuel Pump,

Sard Fuel Regulator,

Tomei Cam Gears,

and other pieces...

all i worried is internal, dont know if it will hold that sort of boost pressure

ok well the boost shouldn't be a problem but i think your better off looking in other area if you want a bit more hp, as offen exact boost doesnt alway mean much exact power. I can only talk from my experiences but my gtr r33 is running around 525hp on stock internals and is quiet happy .Its been around 500rwhp for quiet awhile now and with no problems i do intend on upgrading internals in time as i'm currently buy the components for it.

but to show boost to rwhp relationship on mine at current tune

13psi ~440rwhp

15psi =484rwhp

18psi =512rwhp

20psi =525rwhp

as you can see the last couple of psi arnt gaining much hp and i normal drive it at about 0.9 bar (~440rwhp) on the avcr and just turn up occationly for a bit of a blast etc

the biggest gain in the development of my ride were the install and tune of power fc and then later the install of tomei poncams 260 9.15mm with adjustable wheels

but all the hp from the cams came when i tuned them in ie over a 100 hp increase just from tuning the cams, so i would suggest a nice set of cams (make sure you take the time and tune them) would be a good investment AS LONG you have already upgraded the exhaust turbos back and the inlet system ,as these should be your first mod (i didnt see them in your list, but you may not have mention them )

pete

ps i hope this helps

[Nismo32R]

i have HKS dump pipes, front pipes and 80mm cat back

a r32 GTR from one of the jap magzine got 671hp flywheel at 1.5bar with stock internals

it has:

HKS stage1 cams

HKS 2530s

HKS 1.2mm headgasket + other usual mods to go with the turbo

however, i'm sure that jap is using higher octant fuel and much cooler than aus, which does make differences

[pnblight]

i have HKS dump pipes, front pipes and 80mm cat back

a r32 GTR from one of the jap magzine got 671hp flywheel at 1.5bar with stock internals

it has:  

HKS stage1 cams

HKS 2530s  

HKS 1.2mm headgasket + other usual mods to go with the turbo

however, i'm sure that jap is using higher octant fuel and much cooler than aus, which does make differences

yeah sounds about right with a 20% loss(not sure on exact loss) through drive train that would be about 536rwhp and i have seen a 550rwhp gtr with hks 2530's at 25psi (1.7bar)on std internals BUT i think that may have been on better ron fuel ,but do not exspect this power for to long from a std engine as i only turn up the wick occationly .

the other thing is the garret 320hp ball bearing turbos and hks 2530 (320hp) seem to be a very close match (if anything in my opinion the garretts are best at lower boost around 1.3bar but the hks come into there own at the higher boost setting 1.5 to 1.7bar) but your hks gtss turbos are only around the 280hp per unit mark so may not flow the same sort of rwhp. But you should have very good responce and spool up.

pete

ps i think cams are the go for your set next and i reccomend tomei poncams 260 deg 9.15mm lift these are a direct bolt in unit and require no head machining (there about as big as you can go with out machining) they are simply an awesome cam :wassup:

[SHUTO-BOY]

how do u like ur gtss turbos?

im running 1.1bar on my stockies and id prefer to change them before they blow

[uLa32]

...ps i think cams are the go for your set next and i reccomend tomei poncams 260 deg 9.15mm lift these are a direct bolt in unit and require no head machining (there about as big as you can go with out machining) they are simply an awesome cam :wassup:

i'm thinking of getting those cams too (still std engine). what other mods would you put with the cams or is that all you need? different valvesprings, etc?

[Ronin 09]

i have these cams on my bedroom floor

uLa32: they're supposed to be bolt-in; as long as you don't raise the rev limit too much, the stock valve springs should be ok? I'm not changing mine

Would go with adjustable cam gears though

[Nismo32R]

how do u like ur gtss turbos?

im running 1.1bar on my stockies and id prefer to change them before they blow

They goes hard on the 1st, 2nd, 3rd....but from end of 3rd to 5th....they are not as good~~~!!! therefore, i would say GT2530s would be the best choice for a stock RB26DETT

[Ronin 09]

Danny, there are two types of Poncams - Type A and Type B.

Type A - IN 260 EX 252, 9.15mm lift

Type B - IN 260 EX 260, 9.15mm lift

http://www.tomei-p.co.jp/_2003web-catalogu...r_engindex.html

I have type B

[Nismo32R]

Danny, there are two types of Poncams - Type A and Type B.

Type A - IN 260 EX 252, 9.15mm lift

Type B - IN 260 EX 260, 9.15mm lift

http://www.tomei-p.co.jp/_2003web-catalogu...r_engindex.html

I have type B

How come Nengun has 2 Type-A

1. IN 260 EX 252, 9.15mm lift

2. IN 260 EX 256, 9.15mm lift

and Type-B the one you bought

Type A

In order to get stable idle and raise low-mid RPM torque, we set the duration of EX camshaft shorter.

Best suit used with stock turbine or N1 turbine.

Type B

By giving longer duration timing than type a, it eables to raise both response and peak power at the same time, even with mid-large sized turbine.

[Ronin 09]

hmm... don't know might possibly have a slightly longer exhaust duration cam for type A?

[uLa32]

not sure on what to get too. possibly the type A as it should go well with the bigger turbos. i'll most likely keep the rev limit standard as well... unless a little more can get me more power and response.

[Yorik]

I am a complete lover of Tomei equipment, after fitting Tomei PONCAM's to my already modified SR20, I got a completely new car, so muhc fun to drive, so I am more keen on going for an even higher lift cam this time, I want to keep the revs low adn I love mid range and torque.

So I am thinking of going to the Tomei PROCAM 260deg 10.85mm lift along with Springs and lifters, I think that these cams should really be a great addition to mid range addiction.

Anyone running these cams?? Just hoping the 2530's won;t run out of puff on these cams, my last turbo on my SR20 did, dropped 1psi at redline..

I haven't done Desktop Dyno simulations yet, but I will very soon. The ones for the SR20 was pretty close to what I measure with my GTech Competition Pro - no dyno for 1600kms..

[Maxx]

isn't HKS web site say the GT-SS only good for 1.4 bar?

i had a friend running a tomei engine + stock turbo @1.4bar for over 20000km and the turbo is still fine, i know he is a special case