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Rb25 Turbo On Rb20

d_soljah

By d_soljah,
in Engines & Forced Induction

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d_soljah Proficient

d_soljah

Posted
Posted

ive searched and read through afew different threads but couldnt find the info im after.

on my old r32 i put an rb25 turbo on my rb20 and just drilled and put a tap on the front housing.

now im going to put my spare rb25 turbo i got laying around on my rb20 in my current r32.

just wondering how else others have ran there boost lines with out having to use the r33 boost solenoid or boost controller on their rb20's.

thanks

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https://www.sau.com.au/forums/topic/420156-rb25-turbo-on-rb20/
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d_soljah Proficient

d_soljah

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Posted

haha left that part out , how else have they been installed with out drilling the front housing and adding a tap like i did the first time i did it.

is there a way to install them with out having to do it like i previously did , and can it be done with out using the r33 boost solenoid or a boost controller.

GTSBoy Grand Master

GTSBoy

Posted
Posted (edited)

You either need to to drill and tap the housing or weld on a tapping point on the hot side intercooler pipe (preferably at the turbo outlet end of the pipe). Not really any other option than to source a boost reference from there. Don't listen to anyone who tells you to get it off the plenum.

Yes it can be done without any boost controller at all - just run a hose direct from boost reference location to actuator**. You will get whatever the R33 actuator is set to give (5 or 7 psi). If you want more, then you either need some sort of boost controller or you need an R32 actuator (which will give you ~10 psi). The R33 solenoid will do you no good on an R32 as the ECU doesn't know what to do with it.

**this is exactly how my Neo25 is set up at the moment in R32 until I get it inspected and can put the boost controller back on.

Edited by GTSBoy

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