rb25, rb26 block, whats the difference.

[PorkChopExpress]

hi, im new to nissans. tried posting this in another forum, but didnt get mutch response.

im wondering what the physical difference is between the rb25 and the rb26 block. i know it has a slightly larger bore, but anything else?

any extra webbing? different alloys used?

dont care about the bottom end, thats getting replaced. same with the stock manis and turbo.

what about the heads? any difference in flow?

thanx for looking.

[Sileighty_85]

As far as exterior cant really tell ya should still be a cast Iron block but not sure I havent worked much with RB26's

Internals should be reinforced

The head uses individual throttle bodies and probably larger ports