Rb25 Turbo Nipple

[eXc]

Hey Guys,

I am putting an RB25 turbo on my RB20 in the next few days, I just wanted to know where I should put the nipple for the wastegate hose.

Should I put it on the compressor housing? Or on the intercooler piping? Do I get it as close to the compressor housing as possible or doesn't it really matter?

Does it matter how long that hose is? I have a mechanical boost controller, I was thinking I might mount in a different spot, but it would mean that the line would be about 2 foot long at a guess.

AI spose I will find out when I get the turbo off, but where does the standard RB20 one connect to? Obviously I have read that I will need to add a nipple in, I am just curious how the RB20 one works then.

Much appreciated

Chris

Edited January 14, 2007 by eXc

[predator]

Best is on the compressor housing.. if not closest to the compressor housing on the intercooler piping. Shorter hoses are probably an advantage.

rb20 ones uses a nipple on the housing

[eXc]

Sweet thanks

I will try to find a place to tap it in for me in the morning...hope the water line match up! There isn't a way to find out before I pull it off is there? Cause you can't get to the waterline really can you?

[N I B]

You will need to change water fittings.

[rb20inside]

as mentioned, tapping a hole in the comp cover works well.

you can also weld a nipple into the intercooler piping at a convenient location.

either options works fine depending on what tools/equipment you have.

the length of the vacuum line does have an effect, how much... depends.

the shorter the length the better but its not like going from the 150mm of the rb20 line to 600mm in your custom location will be overly noticeable.

i have heard rumours that some rb25 turbos require different fittings to allow the water lines to fit up to a rb20 but i have never come across any problems when fitting three different rb25 turbos to three different rb20s and two vg30 turbos to a rb25 and a rb20.

Edited January 14, 2007 by rb20inside

[WazR32GTSt]

when my turbo was fitted (by a mechanic) they tapped the line into the 'hot' intercooler hose, between the copressor outlet and the intercooler inlet..

also, no water or oil lines required modifying for it to fit..

[geeteaess_turbo]

i replaced the water and oil feed lines with braided lines because they are much much easier to work with than steel lines

[eXc]

ok, I put it in the compressor housing.

I needed to change water lines. Predator - I have posted in your Tutorial thread on how to tell this, thought you may like to add it to your guide for future people? Basically if it's not a 24mm head on the water lines, you will need different ones (mine were 22mm)

Getting on dyno at 12:30 today to check everything out. The turbo is making a heat related smell. I am hoping it's just cause it's been sitting in this guys garage for 3 months or whatever.

Appreciate your help guys

Cheers

Chris