Looking 420-450rwhp From The R33

[3intheBack]

I'm looking to pull 420 - 450 rwhp on the R33 RB25. Got the basics, large fmic, highmount manifold, 4 inch dump and Apexi Power FC. Just looking at what else I need to add??

Fuel Pump Bosch 044 ??

550cc injectors ?? ( currently they are stock)

Turbo - GT3040 or GT3540 ??

Thanks in advance for the advice.

Wazza

[R31Nismoid]

GT35 is required, boost late in the 4000rpm. 1st and 2nd gears will be mostly uselsss

Make sure you budget for the rebuild. No telling how long the motor will last @ that level.

[MR331307]

GT35 is required, boost late in the 4000rpm. 1st and 2nd gears will be mostly uselsss

Make sure you budget for the rebuild. No telling how long the motor will last @ that level.

1st and 2nd gears will be mostly uselsss

carnt say that

maybe first but second isnt useless

Mate if you get the GT30 its more streetable

the GT35 you will have big TRACTION problems

[3intheBack]

These questions are for a mate who isnt a member (no puter).

I have told him to phone you re your GT3540 that is for sale.

[MR331307]

These questions are for a mate who isnt a member (no puter).

I have told him to phone you re your GT3540 that is for sale.

The turbo is not only for sale

the whole package is

i will not be seperating the package as i will probly be stuck with parts that i carnt use on my next package that i just purchased

[R31Nismoid]

I found with my GT30 second really didnt give a lot of thrust, so it wasnt working hard. And thats without wheelspin.

So i would envisage the GT35 to be worse being its larger, comes on later and therefore would snowball

The gearing doesnt allow it to really load up unlike 3rd/4th which is good enough to allow a big GT35 to get into good movement.

[phee]

these are the mods on mine:

G-Max Wheels rear: 18x9.5 with 265’s front: 18x8.5

Tein hight and rebound adjustable suspension

Full 3inch custom exhaust with Magic Cat and twin Mufflers

T04 turbo on X-Force highmount manifold

Turbosmart 48mm Pro-Gate wastegate

100mm think Front Mount Inter Cooler

Blitz blow off valve

Sard fuel pressure Regulator

Sard 550cc injectors

Walbro 500 horsepower fuel pump

Motec Enginge Management System

Exceedy 5 puck clutch

Pod air filter

Oil catch can

Thermo fan

Bonnet vents

Isotta Steering wheel

DBA 4000series sloted disks alround with braided lines

Braided fuel-line, blow-by, breather and radiator overflow hoses

New chrome radiator overflow tank

Gates Racing radiator hoses

Viper 790VX Pager car alarm

She is going through an RB30 bottom end conversion at the moment, but with those mods listed above, she was dynoed at 365rwhp at 14psi.

[R31Nismoid]

Got a dyno sheet for that?

[Kaido_RR]

I'm looking to pull 420 - 450 rwhp on the R33 RB25. Got the basics, large fmic, highmount manifold, 4 inch dump and Apexi Power FC. Just looking at what else I need to add??

Fuel Pump Bosch 044 ??

550cc injectors ?? ( currently they are stock)

Turbo - GT3040 or GT3540 ??

Thanks in advance for the advice.

Wazza

might not be helpful but a

hks gt2835 pro s, rate at 420. would be able to make 400rwhp maybe alittle more and the lag of them isnt that bad, i find it comes on boost quickly and hard with min. wheel spin

of course you would need

550cc injectors or bigger (i would go 740cc they are only $50 more)

z32 afm

aftermarket ecu

bigger fuel pump

plus some suspension mods to help

get the power down (i highly recommened you buy an aftermarket lsd the stock one is shocking)

if the 2835 is too small, i would go for the gt3037 pro s

[phee]

no I made it up

[R31Nismoid]

She is going through an RB30 bottom end conversion at the moment, but with those mods listed above, she was dynoed at 365rwhp at 14psi.

14psi/365 would be a fair effort in anyones stakes

Your graph is around 1.1bar... give or take so not quite 14psi... whats 1.1bar... i forget.

Someone will know what that is in PSI... i think 15.5 or 16?

Seems a tad laggy though, but similar to my old bucket T04 that i had moons ago.

Whats it like to drive on the street?

[phee]

Really fun

The dyno was done before I bought the car so I really am going off what I have been told and know (which isn't much but I'm learning!)

Good luck with trying to get 400rwhp, but I think you're going to need a few more add on's than what you have, unless you want to go through an engine rebuild.

[phee]

I don't know if this is going to help you at all, but these are the mods done to another R33 that was getting 472rwhp.

Engine

Top End

- RB25DET i6 24valve twin cam head (freshly rebuilt)

- Skyline GTR Cams

- Skyline GTR Valve springs

- Modified oiling system restricting flow to the head.

- Tomei 1.2mm metal head gasket

Bottom End

- RB30 3.0 litre turbo bottom end

- JE Forged Pistons (Dished) - HPC Coated

- Shot peened, crack tested, and strengthened rods

- Balanced & machined crank

- Blueprinted & balanced during assembly

- GTR Oil & Water pump

- Tomei Rod Bolts

- enlarged baffled Sump

Turbo, ECU & Fuel

- Trust Hybrid Turbo (T04R front wheel, back cut t66 rear, 360deg thrust bearing)

- Trust 45mm External WasteGate

- Trust Custom Tubular Exhaust Manifold

- Apexi PowerFC ECU + Hand Controller

- 16psi boost.

- Z32 300zx Air Flow Meter

- Aftermarket Jap 550cc Injectors (unknown brand)

Ancilleries

- 3" high flow cat, and a 3 1/2" trust system up to the turbo

- External 45mm Seperate pipe on the Wastegate into the exhaust just before the cat.

- Oil/Air Seperator with return line to the sump.

Unsure if he advertised on this forum, but here are two links to have a read of if you're interested in getting the same amount of hp:

http://www.performanceforums.com/forums/sh....php?t=67193992

http://www.performanceforums.com/forums/sh....php?t=67193482

[R31Nismoid]

Lowths car... the one with the bastardised turbo on it

[HypeR33]

Go the GT3540R, it is a great turbo and with the .82 exh housing that I have gives full boost at about 4800rpm. I have got 410.7rwhp at only 15psi, so it is easily capable of over 450rwhp with the right supporting mods. But a rebuild will be in order before winding the wick right up on boost

As R31Nismoid said, 1st gear is useless and second gear will spin on demand...you need a lot of rubber to get anything out of second...my 265's cant cope

[R31Nismoid]

I never remembered to ask ya Jason lol... how do you find it on the street?

Being it feeds in close to 5000rpm.

Where is your limiter set?

[HypeR33]

I never remembered to ask ya Jason lol... how do you find it on the street?

Being it feeds in close to 5000rpm.

Where is your limiter set?

It is awesome to drive although it is slower than it was previously up to 4000rpm, but then the fun starts :PBJ:

The limiter is set at 8000rpm I think...I wouldn't mind putting in an RB26 crank to increase the displacement slightly, but as it is now, it still isn't that slow off boost

Cheers

JB

[3intheBack]

Thanks for all the replies and advice guys.

The mate has settled on a GT3040R - need to keep it streetable.

4000+ before power is not much fun and similar to what the current T70 is doing.

Been priced at $1745 does this sound reasonable?

Plus one second hand T70 for sale - slight scrapping noise from the exhaust turbine, still spinning, but not happy jan!!

[Color_Of_Green]

no I made it up

laggy,

RB30 bottom end should fix that

[604cefiro]

Hey guys,

Here my current setup that dyno'd at 403whp on an RB25DET w/ garrett GT30R, avc-r is turned off and using a 1 bar spring on the external tial gate.

Internally stock, but i am in the process of buying tomei cams, and 1.2 headgasket.

My dyno is pretty close to phee's.

You guys think the cams would aid in boosting earlier?

RB25DET Motor Swapped from an 1994 R33

MINES Tuned 300ZX Z32 TTurbo ECU

Aeromotive Fuel Pressure Regulator

Aeromotive Liquid Filled Fuel Pressure Gauge

Greddy Hi Polished Intake Manifold

Greddy External Oil Catch Can

HKS SSQV BOV

HKS Type S Front Mount Intercooler

Garett GT30R Ball Bearing Turbo Hi Polished

Thermal Wrapped Turbo Blanket

Tial Wastegate 38mm

- Externally Dumped

Custom Top Mount Stainless Steel Exhaust Manifold

Kinetic Motorsports 550CC Injectors

Keeplabs Custom Billet Top Feed Fuel Rail

Keeplabs Custom 90mm Q45 Throttle Body

Keeplabs Custom One Piece Driveshaft

Keeplabs Custom Intercooler Piping

Keeplabs Custom 3” Downpipe (Heat Wrapped – 1 02 bung, 1 extra bung for Wideband)

Keeplabs Full AN Fittings, Stainless Braided Fuel System

3" Stainless Steel Catback Exhaust

- 3 Inch Straight Through From Turbo

Z32 AFM

Walbro 255 Fuel Pump