This thread is for all the

RB25/30's
RB26/30's

Or any other hybrid motor combo (should someone waste time doing 20/30 )

Whether they be in a GTR, or GTS-t dont matter...

Go nuts... as usual, no chit-chat plz. It will be removved without notice

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R32 GTST

Standard Rods
87mm Wiseco Forged Pistons
Mildly ported polished head, port matched, valve deshroud and usual rebuild.

Stock RB20DET injectors, turbo, airbox and filter
3" turbo back exhaust
Bar/Plate FMIC
No boost control, standard actuator boost level. Peaked at 12psi then tailed off to 9psi by peak power.

Std AFM @ 4.98v, Z32 AFM @ 4.0v.
RB20DET Injectors @ 92% duty at peak power, over rev to 5000-6000rpm would see 100% duty to hold a 12:1 AFR.

176rwkw.

My Rb30DET in a R32 skyline

Stock RB30 bottom end from a VL commodore (300,000+kms)
Stock RB25 n/a head, Stock cams with heavier valvesprings
Stock exhaust manifold with GT35/40
Stock plenum/inlet manifold
3 inch exhaust
FMIC
550 cc injectors and bosch 044 pump
Microtech ECU

Made 306rwkw on 20 psi with 550nm torque, have since added 260deg cams and made 312rwkw with better midrange power & torque.
Power peaks at 5800rpm, then drops of pretty quick, i suspect this is caused by the stock exhaust manifold which i will change soon.

First tune:

Very much identical to SKY30 in everyway,
except for extractors and external gate,252 duration cams and adjustable cam gears, made 470rwhp on 15psi on pump fuel run in tune,

Second tune:
602bhp or 450rwkw on 29psi pump tollulene mix.
Replacing clutch atm ,as it shat itself on the second and third run.

449.7rwkw/602bhp chart

RB25/30DET
completely standard bottom end and head.
T66 turbo 24psi
More to come when nos added, will update

371awkw
<dyno sheet>

Just got my car dynoed this past week. Car feels great til about 5900rpm then starts to valve float. It made 228rwkw's@15psi. This is in a 1992 R32 gtst. I rebuilt the rb30 to na spec and the head is from an r32 with an rb25de, i just had that checked and the seat tension re done, should've put GTR valve springs in when i had the head off!

Mods are:
full 3" stainless steel exhaust (custom dump pipe)
600x300x75 intercooler with 2.5" piping
Apexi Ap engineering Power FC
GT35/40 1.06 exhaust housing
gtr fuel pump
gtr injectors
z32 afm
standard airbox with apexi panel filter and CAI

here's my dyno sheet (the afr's were good with 11.9 - 12.0 all through the rev range!)

R33 GTST

RB25det head with VVT oil line
Standard Bottom end rebuilt with new rings and bearings only
Nismo 740cc Injectors
Sard Pressure Reg
Walbro 550 pump
Plazmaman Plenum
300x600x100 Intercooler
Extractors
GT3540 .82 rear Turbo
Tial 38mm Gate plumed back
Power FC & HC
3" exhaust

Made 346.6 RWHP on a conservative tune (low timing) on 16psi. Will post pics and dyno sheet. Got it tuned on Saturday and the dif blew on sunday lol. Bit worried about the bottom end so I did not go above the boost level sydney kid recomended.

----EDIT----
Bottom end shat itself. 5 pistons has broken or missing rings during that power run / tune also 6 months later it spun 2 bearings... so rebuild..

Forged Pistons
Forged Hbeam rods
Balanced Bottom End
Crank collar modification

Owner street tuned at 16psi made 397.6 RWHP in 38deg heat- engine is only running 120psi in each cyl so we can run a extra 10psi or so boost later on.

---EDIT---
Retune to 20psi made 317rwkw
Passed the Emissions Test - IM240

-Edit 2-
Installed 044 Pump - retuned to 363rwkw.. spiked 27psi and holds 24psi to redline

RB25/30
Stock plenum
Stock cams
Stock injectors
Stock head, serviced, ported & polished
Stock exhaust manifold
Rising rate fuel regulator
Rev I-beam Conrods
CP Pistons 8.3:1
CP Rings
N1 oil pump
Powermax water pump
ARP main studs
ACL Race Series Main and Rod bearings
ACL Valve Stem seals
3 inch exhaust
Haltech E6K management
Haltech ignition
Haltech boost controller
No AFM, map sensored
Front mount intercooler
911T Fuel pump + surge tank
High flowed turbo , Hitachi internals, looks like stock housings to me but compressor housing possibly different.
Compressor housing bored to take a 56 mm wheel(inducer) , 500 hp bb core , Exhaust housing bored to take a larger steel wheel, size unknown. Pics of turbo posted in discussion thread.
Apexi BOV
Tuned at 15 psi due to lack of fuel delivery
Injectors at 96% duty, fuel pressure on full throttle 68psi
293.7 kw and 462.7 Nm

Notice the Torque between 3500 and 5000 rpm

Nissan RB25DET Head (Ported)

Nissan standard RB30e Block (251,000 kms)

Throttlebody moved to front end of plenum

550 cc injectors

Trust manifold (useless piece of shit - cracks after a couple of minutes during burnouts)

Trust TD06-20g Turbo

Trust (guessing?) external wastegate (have a listen in the vids - gotta love it)

Bosch 044 pump. Custom surge tank by Glen Hunter

Apexi PFC

240rwkw @ 10psi (dunno where dyno read out is)

full boost by 2100rpm. all that work pretty much to do burnouts

as can be evidenced below!

http://www.clutchfcukers.com/videos/Mark.B...ivX6.1-KERO.avi

http://www.clutchfcukers.com/videos/Mark.B...ivX6.1-KERO.avi

oh, and it's in a R31 - the only skyline to come out stock with an rb30 block!!! get a 31!!

here's my dyno readout picture


cheers, mark

Have recently sold my car but here are the results anyway

R33 gtst
RB30/25 vvt
arias pistons
Preped standard rods
Stock head and cams apart from mild port and polish
Custom Plenum
High mount exhaust manifold
GT35/40 .7 front .82 rear
50mm gate
600cc injectors
044 pump and 2ltr surge tank
wolf 3d plug in

301rwkw on 18psi


recently bought a 32 gtr and its bulshit the difference between off boost tourque and throttle response, huge difference! Could pull up hills withough even boosting.

Just got my RB30 done with HKS2535
332rwHP
details at
http://www.skylinesaustralia.com/forums/in...showtopic=83883

1990 R32 GTS4 MSPEC RB25/30

-STANDARD RB25de HEAD
-STANDARD RB30 BOTTOM END (REBUILT NEW RINGS BEARINGS ETC)
-1.6MM METAL HEAD GASKET
-1050KG EXTRA HEAVYDUTY CERAMIC GTR CLUTCH
-GT3540 0.82 REAR AR
-TIAL 44 EXTERNAL WASTEGATE
-3" DUMP/FRONT/EXHAUST SYSTEM
-FMIC 600X300X76
-BLITZ POD FILTER
-SHEEP DOG BOV
-POWER FC
-NISMO FUEL PUMP
- 8:1 COMPRESSION

ON 8PSI 183.9 RWKW AT 5,500 RPM STOCK INJECTORS AND AFM MAXED OUT!

1997 R33 S2 GTST RB25/30 Race Car.

RB25 Head with VVT
Mild Port n Polish
Tomei Type A valve springs - Soon to be.
Greddy Intake Manifold w/ Q45 Throttle Body
S/S Exhaust Manifold - Soon to be 6Boost
Tial 38mm Wastegate - Soon to be 48mm Turbosmart Gate
GT35/40 0.82 Rear AR
3" Straight through Exhaust, Dumped PS infront of rear wheel
Screamer to ATMO
Q45 AFM
850cc SARDS
POWERFC PRO w/Datalogit
AVCR
600X300X76 PWR I/C - Soon to be 110mm ARE I/C
Turbosmart BOV
CP 25/30 Pistons w/CP Chromemoly Rings 8.3:1 CR
ACL Steel Headgasket
REV I Beam Rods
ATI Super Damper - Soon to be.
044 Bosch Pump/ 40ltr Fuel Cell
ACL Bearings all throughout
ARP Main & Head Studs
Tomei 256 Poncams IN/EX
NI Oil Pump with JUN Crank Collar
4.5l Custom Catch Can
PWR 50mm Core Radiator
High Energy Circuit Sump
Exedy Twin Plate Clutch w/ Chromemoly Flywheel
Remote Oil Cooler

That setup on 18psi made 240rwkw. Dont know torque figure. That was base tune for run in. Will be going back for full tune when soon to be items go on. Was tuned at Charlies Motors in Brisbane. They dont give dyno print outs and they dont believe in pimple faced horsepower, hence why our power figure is alot lower then everyone elses for amount of mods done. But it sure is a hell of alot quicker then old rb25, I can swear by that.

Ill try and get a printout on next tune, if not ill just have to take a photo if im there whilst its on the dyno. Were hoping for 300rwkw

R32 GTS4
Stock RB30 bottom end
Stock R32 RB25de head
Stock R32 RB20det exhaust manifold
RB26dett plenim with VH45 throttle body
Custom T3/T4 hybrid
447kw all 4
10.21 @ 134mph

R32 GTR
RB30 4wd bottom end
RB26dett head
Stock intake
Stock exhaust manifolds
Stock slightly modified turbo's
330kw(445hp) all 4 @ 19psi, 420kw(560hp) all 4 with small shot of NOS

Anyway here is the dyno graph from the tune. They had problems with wheel spin, they couldnt keep the car down, with it strapped down as hard as they could get it and with a few fellas in the boot it still managed to wheelspin...They chewed up the re55 sr's...made a mess of their dyno room. You can see the blips on the plot.

 DSC01893.JPG ( 552.85K ) Number of downloads: 366


So final figure was 320kw at 8000rpm, wanted to keep going but 8k redline is fine. That was on 1.3 bar(19psi), knock is around 50-70. So due to boost spiking and excessive knock, that was the highest boost we could run with. Next step is definetely the water/meth injection, bigger cams and probably the 1.06 rear depending on lag difference. 400kw would be great, and shouldnt be too hard to achieve with the future mods.

Things that we changed to since last tune : 110mm ARE intercooler, turbosmart 48mm WG, 6boost manifold and ATI damper.

We are happy with it so far, and will know how much better it is in a few weeks at sprints and racing at QR

*New power output with water/meth injection is now 365kw @ 8000rpm*