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Max safe power from RB25???

CAT_SPEW

By CAT_SPEW,
in Engines & Forced Induction

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CAT_SPEW Rising Star

CAT_SPEW

Posted
Posted

I'm looking at buying a car with an RB25 which has made 480HP@20psi and am wanting to know if the engine can safely handle this power?

It has the following support mods aswell and the power was made on a TD06-25g

injecters

fmic

exhaust

bigger fuel pump

Microtech

GTR box with heavy clutch

oil catch can

Engine is said to have 65,000km's on it too..

So does it sound like the car would be able to handle this power without blowing up on me???

Also, I did a search but couldn't find exactly the info I was after. What are the power specs of this turbo? Externally gated? And what boost can be run through it?

Cheers, Matt.

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CAT_SPEW Rising Star

CAT_SPEW

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Posted

Not sounding too good..

These are the mods that were listed..

ontains the following mods

RB25DET (series 2) motor 480hp@20psi

R33 GTR Gearbox with near new exceedy clutch

Modified Inlet manifold (Micks Metalcraft modification) to point the throttle to the front of the car (shorter intercooler tract) as well as ported inlet manifold by TRP in sydney.

Malpassi Rising Rate Fuel pressure regulator with gauge

660cc Injectors

650hp Walboro Fuel Pump

Microtech MT8

600x300x76 Hybrid Intercooler

Trust pod filter with 4 inch stainless inlet pipe

TD06-25g Turbo - rebuilt with 0.7 front cover with larger front wheel.

Turbonetics 45mm external wastegate with screamer

oil catch can

polished rocker covers

3 inch HKS exhaust

Tien coil overs - hight, camber, damper adjustable

5 stud conversion on all 4 corners

R33 GTS-T brakes

17x9 all around deep dish work rims

Bride drivers seat

Greddy boost gauge (white face) with peak recall

Greddy gear knob

CD Player

On street tyres this car has run a 12.00@118mph on low boost (17psi) on street tyres with a decent set of tyres lower times can easily be acheived.

So you reckon either he has used high octane, C16 or whatever it is called on the dyno?? And will definatly go boom on me without internals??

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

480hp... thats around 360rwkw give or take isnt it?

i'd like to see that dyno graph.... only on 20psi...

stock head too it seems, not that stock heads dont make power at all... but it would be using some fuel IMO without cams to get that high

Sydneykid Grand Master

Sydneykid

Posted
Posted
RB25DET (series 2) motor 480hp@20psi

OK, is that 480 bhp or 480 rwhp?

If it is 480 bhp, then that would need to be measured on an engine dyno.

That's a liitle more than I would like for standard internals (450 bhp is my rule of thumb), but not extravagently so.

If it is 480 rwhp (358 rwkw) that's ~560 bhp (418 rwkw) and that's way past what I would consider to be safe for standard RB25DET internals.

Maybe its 342 rwhp (255 rwkw) and someone has simplistically added 40% to get 480 bhp. Plenty of that going around.

The 12 @ 118 mph in a Silvia works out around 225 rwkw (380 bhp).

We don't use plain bearing turbos so I can't give any comment on the 20 psi from the TD06-25g.

;)

INASNT Grand Master

INASNT

Posted
Posted

If it does have 480rwhp on stock internals then just use an ebc, if it doesent have 1 and run around 1 bar for daily driving and it will last till you decide to rebuilt the motor with forgies etc.

Everytime you drive the car it wont be making 480rwhp unless u are at full throttle and doing 7500rpm changes all day everyday.

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