Rb26 Conversion!?

[zacboy]

just want to know if u can change an rb25 out for a 26 but bolt the 26 to the rb 25 gearbox?? just would like to know if thats possible, thanx!

[Ben C34]

Yes.

[Shoota_77]

Yes.

[Shoota_77]

Jinx!

[Ben C34]

No fair!

[zacboy]

f**k yeah! thanx boys!

[MJTru]

Yes it is. I feel one of the biggest problems will be what approach you will use oil pan wise. But for the better part it can bolt right up. Good luck.

[zacboy]

is the oil pan really different or something? what makes it a problem bro?

[Ben C34]

It has a diff in it.

[zacboy]

shit forgot all about that.. any ideas?

[Matthew Black]

you can bolt the 25 sump and pickup strate to the 26 block it fits

[zacboy]

sweet man thanks heaps!

[JH32]

I think there's a bit of fiddling around with the RB25 sump but it's certainly doable. Or you could cut the diff off the 26 sump and use that.

[ido09s]

Take the 26 sump to a decent fabricator and ask him to cut the diff off it and weld it up. The 26 sump has quite a bit of strength to it. While they are at it put a decent extension on it to your oil side of things is sorted. If your in Sydney Performance Metalcraft know what to do with it

While the engine is out i would also put a decent oil pump on it so you dont have to worry about pulling it out again any time soon

[zacboy]

thanks guys! ill take all that info on board and see what i come up with, shame i dont live in sydney for that purpose but ill figure something! thanx!

[ido09s]

Call Leon and ask him what he can do for you. He would probably do exchange and send you a sump ready to bolt it on

[MJTru]

The 25 sump and oil pan doesn't just fit straight on. There is some fabrication that needs to happen. After you bolt up the 25 oil pick up. The oil pan wont just go on. After you figure out how to get it on you will notice that the oil pan is hitting the base of the oil pickup. Then if you want you can grind the pickup base which I dont like to do because it can lead to oil problems later because of how much you have to grind off to fit the oil pan on the block. When I did it I simply modified the rb25 oil pan in that section. I heated it up and shaped the side in a round fashion to clear the oil pickup base. Then if I remember its still has one bolt I had to sacrifice which was no big deal as the sealant (silicone) took care of that.

What I would do if I did it again is as mentioned above use the 26 aluminum oil pan and cut the diff off and weld in parts that needs to be filled in.

Go on RaceFab and look at how they did it on there site. Or just buy one from them.

[MJTru]

Its the only photo I have of it. If you magnify the photo you will see the part that got moded. The other side is fine and lines up.

[zacboy]

i got onto race fab! brilliant! thankyou!