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Is There A Thread That Lists All The Limits Of A Rb26 Engine?

GTRNUR

By GTRNUR,
in Engines & Forced Induction

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GTRNUR Grand Master

GTRNUR

Posted
Posted

I am curious to know what the reliable and possible limits are for the components that make up our skylines. I've been through the dyno thread to see what people have done, but that and whats reliable are two diferent things.

Eg... I have an R33 GTR vspec, so based on the components of a standard car what are the limits of that parts that we all change when tuning for max power.

440cc Injectors - xxxHP

Standard GTR AFM's - xxxHP

R33 Fuel pump - xxxHP

Standard Rods - xxxHP

Standard Crank - xxxHP

Standard pistons - xxxHP

Standard block - xxxHP

Oil pump limits - xxxHP

Standard R33 Cams - xxxHP

Anyone care to jump in here...?

Cheers,

Ian

benm Grand Master

benm

Posted
Posted

The figures will vary depending on peoples individual experiences.

ie 1 person will say their fuel pump died at 220kw where as others will say they need to replace it at 250kw.

GTRNUR Grand Master

GTRNUR

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The figures will vary depending on peoples individual experiences.

ie 1 person will say their fuel pump died at 220kw where as others will say they need to replace it at 250kw.

Yes true, but 30kw is hardly worth mentioning for somethign like a pump. Its usually the first thing changed too, then a fuel pressure regulator to crank every last bit out of your stock injectors.

Thinks like rod bolts let go at rpms as well, due to age and metal fatigue. Its hard to really see what happened when your looking at the aftermath of a rod failure too. A LOT of failures happen due to missed shifts, or are due to bad tune.

Its a lot easier to be sure of the limits of sensors to the point where the ability to tune properly is no-longer possible, vs the point at which a rod turns into a banana because you used too much boost... Can you tell i'm a high octane fan!!!?

Cheers,

Ian

R31Nismoid Grand Master

R31Nismoid

Posted
Posted

Also to note, someones motor dies with say 300rwkw due to poor tuning and they dont realise.

Or they have tried to push say... the injectors too hard.

Again, the limit is also wrong then.

Roughly it goes like this from what i have seen here over the years

RB26 - 330rwkw street/300rwkw circuit

RB25 - 280wkw street/250rwkw circuit

Also things like AFM's etc, you can tune past the point they max out.

Some tuners get better results with stock cams than aftermarket ones etc. Its all dependant on car setup and the intended use and i would say its all individual based upon this.

Dynos make a difference too, one might be 30rwkw higher due to the model/type. Again thats a noticeable difference depending on the circumstance.

It is really hard to gauge something.

Beer Baron Grand Master

Beer Baron

Posted
Posted

440cc Injectors - 440HP (or around 280rwkw)

Standard GTR AFM's - will hit the max 5.115v at around 260rwkw

R33 Fuel pump - change it when you change the injectors.

Standard Rods - xxxHP

Standard Crank - xxxHP

Standard pistons - xxxHP

Standard block - xxxHP

Oil pump limits - xxxHP

Standard R33 Cams - xxxHP

the other parts you mention don't really have a power rating. it depends on application, tuning, driver, support sytems etc as to how long they can live.

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