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Head Casting Numbers?and Visual Diffrences Rb20/rb25 Heads

dori_fc

By dori_fc,
in Engines & Forced Induction

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dori_fc Contributor

dori_fc

Posted
Posted

ok i want to find out what kind of head i have via the casting numbers - and they are from what i can see on exuahst sideabove cylinder 1/2 is= 75T1

is there anything around that details this??

also what are the visual diffrences between rb20 and 25 heads wilst still on car completley together. i have rb26 covers so i cant tell by them.

i have searched here and google

maybe havent searched enuff or looking in all the wrong places.

any help is great

cheers

ranga

  • 2 months later...
webber Proficient

webber

Posted
Posted

Hey mate, i am working on something that may help. Defiantly R33 RB25, but DE & DET had the same casting. Most people say that the valve springs on the DE are weaker, but Nissan fast indicates that both DE & DET heads use 13203-75T00 valve springs. Anyone know any-more???

Anyway here is my page anyway:

HERE

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