26/30 Heater Hoses

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hi am after help with installing my 26/30 setup.

when i bought the engine it only had the plenum fitted, so since getting it i've been piecing all the little bits together, i'm slightly unsure on a couple of pieces as most people that have done the conversion already had an rb26 and dont need to gather up the parts, as so they are not mentioned in their builds.

do i have to use the steel water/vacuum tube that runs alongside the block to connect heater hoses and to the plenum etc, just wondering how other people have done it as their are not many pictures or info on this when using single turbo, without this there are a few hoses that have no where to go and i would like to keep the heater for road use.

if i dont need it which hoses can i block off and which hoses can i connect to each other to not interrupt flow?

i am also curious on the aac to booster pipes, do i need to use these or can i connect the brake booster to somewhere else on the plenum and block off the back of the aac?

any information would be much appreciated as i'm almost finished and so badly want to drive the car again

any help appreciated, thanks luke

[Adriano]

The booster needs to be hooked up as nissan intended, as the plenum doesnt have vacuum. Need to find a vac/ water hose diagram to figure what you can ditch and what needs to stay.

[leeroy_25]

Not sure on the Options of the brake boost but mine is connected as factory. Regards the metal pipe you mentioned. On my build I cut al the vac lines of and kept the main water one IIRC. I might have a picture somewhere. I will look tonight. I think there is a spout you can block and also on the RB30 block there is a little spout on the rear water pipe into the block that can be blocked. I will try and find pictures to confirm for you.

Lee

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that would be awesome if you had any photos you could post up as im stuck atm

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anyone else?

[=premo=]

Not sure if this is correct but it worked well for me.

Left side of vacuum sensor (under injector manifold) to vacuum side of throttle bodies (one of the pipes coming down). Other side of vacuum sensor to plenum.

Other pipe coming down to brake booster. Block off the rest of plenum nipples and use top small nipples on manifold for boost sensors.

I made up my own heater pipes, one from front of block at thermo housing to heater then heater to the last nipple of block (left in picture behind small lines). I had an external oil cooler setup not like your stock water one but you could have the return heater line going to your oil filter/cooler then from it to block.

Not sure if the small lines are for turbo but if they dont plum into the blocks oil or water then get rid of them and use bigger lines from other side of block (may need to be drilled and tapped but worth it).

My idea is to keep it flowing and simple. Block diagrams can help you see how water and oil moves through the RB30. I remember that it looks like pluming for the turbo water in from one spot and out at another wouldnt flow but it does due to the suction of water passing by the connection point.