Valve Spring Swap (rb26 To 25/30 Hybrid)

[REDMAN8]

hi guys,

I've just bought another r33gtr to turn into a drag/monaro & xr6t basher.I've taken out the original engine and am currently building an rb25/30 hybrid.I was wondering can I swap valve springs from the rb26 with rb25.

[Craved]

pretty sure the RB25de head will take them, havent seen any info on the RB25DET head being able to use them

.. gotta ask, why not use the rb26 head? if its a GTR

[SirRacer]

Others have posted in here that it can be done. when i rung nissan there is only one type of gtr valve spring yet there are 3 different tyres of rb25 valve springs when i rung the local cam/head specialist.

Id consider using an rb26 head on that combination as then you will be able to use the standard wiring. THis + the superior flow characteristics make for a good choice

[Cubes]

hi guys,

I've just bought another r33gtr to turn into a drag/monaro & xr6t basher.I've taken out the original engine and am currently building an rb25/30 hybrid.I was wondering can I swap valve springs from the rb26 with rb25.

Another GTR hey... lol

Why would you run the inferior rb25 head when you have an rb26?

Rb26 springs in to RB25 are fine

RB25 springs in to rb26 is definitely not fine.

The RB25 springs are shorter and are not suitable for the rb26.

[Craved]

so the GTR springs fit in all RB25 heads Joel ?

[2BNVS]

sure do i got em in my 25/30

ben...

[Craved]

thanks ben

[REDMAN8]

Thanks for the replies guys.

I will do the 26 springs.

Why don't I use the 26 head ?

I'm stripping the complete motor out to keep it totally original.My other is a stock std 95 Tommy Kaira.

So in the future If I decide to sell them, they should return me more with a worked (non original) rb26 and 25/30 hybrid engines installed. As well as the original/unmodified/less than 15000km engines for them.

To me this makes sence.

Why own one of the best std sports cars in the world and flog the absolute guts out of the engine/gearbox until it goes bang. Then wish that you had kept it standard and drove it for the next 20 odd years.

When you can keep it for ever, the way it left the factory, if you put a hybrid in.