RB26/30 & JUN Plenum, Clutch Master cylinder replacement
Fitting the RB30 engine into the R33 GTR bay wasn't simple. It took several of us to swing the engine and gearbox into the car and unlike the RB26DETT previously it fouled on a lot. We had to remove the JUN inlet plenum, front crash bar, headlights, Anti-Roll bar and loosed the engine mounts just to get the engine to sit in its rightful place.
Trying to put the JUN inlet plenum back was impossible as it would hit the Clutch Master Cylinder. Two options, replaced the Clutch Master Cylinder, or take a chunk out of the Inlet plenum. We opted to change the Clutch Master Cylinder.
We ended up removing the R33 GTR Clutch master cylinder and replacing it with one sourced from a Nissan S15. The S15 one isn't servo assisted like the stock R33 GTR ones, so it's a lot smaller in size. It was so small in fact we had to put in a spacer to bring it away from the firewall so the bottle top could be fitted.
Once we removed the existing master cylinder, we drew up a cardboard template of the new Clutch Master cylinder and drilled two holes. We fitted the Clutch Master Cylinder and bent the existing pipe that went to the R33 one to the Silvia one.
Tip: The Brake master cylinder needs to be loosened to remove the Clutch Master cylinder.