Rb26 Exhaust Manifold Adaption To Rb25 ?

[discopotato03]

Hi all , I'm also curious to know if there's any interest in plate adapters to mount RB26 twin exhaust manifolds on an R33 RB25DET head . I can't make them but others may be able to .

People quite rightly think that twin scroll turbos are expensive to do on an RB25 but if the RB26 manifolds could be made to fit then twin singles with their own integral waste gates could be a viable alternative .

I know that the RB25's spec of cam/compression ratio is different as is the capacity but the right turbos could get you into the 280-300 Kw area without too much difficulty . In fact I think the 25's higher static compression ratio would work in your favor with the pump fuel available nowdays .

Just a thought , cheers A .

[D_Stirls]

In the next 6-8 months i will be fitting up some twins to a RB25 (as well as a GTR intake), i was wondering if anyone else has done it and how much work is involved. If i need to make up an adaptor plate than that fine but at this stage i was just wondering. My brother (GROWLY Custom Machining) and i have made a fair few CNC parts for my CA so if we make up a plate they will be produced for sale.

There's some of the stuff that we've made for my current CA18 in this thread:

http://www.nissansilvia.com/forums/index.p...howtopic=293828

Remote oil block (these also if RB's);

http://www.nissansilvia.com/forums/index.p...howtopic=297846

CAS Bracket, Backing Plate and Cam Gears;

http://www.nissansilvia.com/forums/index.p...howtopic=276138

Custom Engine Mounts (Final Design);

http://i133.photobucket.com/albums/q60/D_S.../mounts_008.jpg

Edited April 14, 2009 by D_Stirls