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With all the massive power being made, I think it's time for a 500+kw(wheels) to see what has been tried and tested, and to compare combinations, similar to the 400kw thread.

List as much of your mods as you wish as the more info the better: engine, turbo,cams, boost etc etc

I will start:

RB26 stock block

Apexi SPL V-Max 73.7mm billet crank

Apexi SPL V-Max rods

HKS Step 3 87mm with 22mm pins

Apexi SPL V-Max 290 11.5mm cams

Apexi SPL V-Max Springs, retainers & lifters

Supertech +1mm valves

9.0:1 CR

HKS twin GT3240 + twin gates turbo kit

Trust sump (modified)

External single stage Moroso oil pump (wet)

Apexi SPL V-Max Drag intercooler (150mm)

3" dumps > single 85mm exhaust

Microtech LT12S

3 x 044's + large surge tank

6 x Bosch Indy Blues

Caltex E85

520rwkw on 22psi on a very safe tune, no cam timing, and low rev limit.

Plenty more in it with more tuning, boost, revs and cam timing, but this will do for now.

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RB30/25DET

NITTO/JE pistons 22mm pins

NITTO I beam rods

NITTO 1.2mm Drag headgasket

ARP Main studs

ARP Head studs

Nismo Engine mounts

9.5L ASR sump

Moroso external oil pump

ROSS Harmonic balancer with pump drive kit

Ported head

HKS 256/264 cams

Greddy Plenum

Q45 throttle body

Speedfab Exhaust manifold

Twin TIAL 36mm Wastegates

HKS T51R KAI turbo

4inch Custom turbo back exhaust

100mm Intercooler

52mm Alloy rad

SPAL 16inch thermo

2000cc ID/Bosch Injectors

SX Fuel reg

Twin entry fuel rail

2x Bosch 044 Fuel pumps

Nismo Intank Fuel pump

3L Surge tank.

E85 Fuel

Standard RB25DET gearbox

JB Single plate Full Monty clutch

Tomei Trax 2 way LSD

Supporting mods etc etc etc

547rwkw@25psi

Trapped 137mph on a practise run then blew the diff. :(

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Dave's list in black!!!

RB30/25DET

NITTO/JE pistons 22mm pins

NITTO I beam rods

NITTO 1.2mm Drag headgasket

ARP Main studs

ARP Head studs

Nismo Engine mounts

9.5L ASR sump

Moroso external oil pump

ROSS Harmonic balancer with pump drive kit

Ported head

HKS 256/264 cams

Greddy Plenum

Q45 throttle body

peedfab Exhaust manifold

Twin TIAL 36mm Wastegates

HKS T51R KAI turbo

4inch Custom turbo back exhaust

100mm Intercooler

52mm Alloy rad[/font][/color]

SPAL 16inch thermo

2000cc ID/Bosch Injectors

SX Fuel reg

Twin entry fuel rail

2x Bosch 044 Fuel pumps

Nismo Intank Fuel pump

3L Surge tank

E85 Fuel

Standard RB25DET gearbox

JB Single plate Full Monty clutch

Tomei Trax 2 way LSD

Supporting mods etc etc etc

547rwkw@25psi

Trapped 137mph on a practise run then blew the diff. :(

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Full boost at around 6,300. Only revving it to 8,750 for now. will lift it to 10K when it is re-tuned later.

Traction? What traction? :D I have only driven it in RWD as my attesa isn't working and on stock wheels and tyres.

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Power was still increasing at 8750 and on previous tunes (with smaller turbos) power keeps rising steadily to 10K. We have found that rwhp output for HKS turbos can match the HKS rated figures of their turbos. The GT3240's are rated at 580hp each (@1.4 bar). On an RB26 in twin form, they need to be pushed hard (around 2.5 bar) to get over 1000rwhp.

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The 3240 is basically a 3540 with a cutback rear wheel, fitted into a GT30/28 rear housing (0.87).

With E85 and an RB30 I am not surprised you're making 750+hp @ 1.7bar with a large HKS single. I would love to swap to 0.73 rears or even 0.61's as the 3240's only come in 0.87

My tuna thinks that 2.5 bar is what it will need to get to 1000.

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  • 1 month later...

Hi everyone,

About time we posted this up - here are the specs on our "NITTO" R34 GT-R:

STANDARD RB26DETT bottom end

ARP headstuds

Nitto Headgasket

Standard oil pump

Custom head by Mercury Motorsport

6Boost mani

Precision 7675BB turbo

Twin Precision wastegates

4" exhaust custom made

Haltech Platinum Pro ECU etc.

Upgraded fuel system

Splitfire coils

100mm thick FMIC

Custom i/c piping

OS Giken sequential gearbox

Power: 622awkw/845awhp @ 43psi (ran in 5th gear, to keep the 1:1 ratio due to gear changes, 6 straps holding it down)

Here is the vid:

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