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Forward Facing Plenum ( Tophat / Rb20 ) What To Do With Cooland / Vac Lines?

stÖrmy

By stÖrmy,
in Engines & Forced Induction

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stÖrmy Proficient

stÖrmy

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hey all i got a tophat style forward facing plenum, i run an rb20 in my s13 and one of the main reasons i got this plenum is to elimate alot of my intake and intercooler piping as there is no way for me to have a flush sitting bonnet with my setup.

So in short i need to know if i can just tap into the intake plenum anywhere and put the vac lines to it that were on the old manifold, for example ..

- Brake booster to intake plenum - > can i just tap this into anywhere in the new plenum ?

- the 2 x coolant lines that come out of that little block on the old plenum - > what do i do with these? can i just loop the lines together ?

- The pipe that goes from the old plenum to the rocker cover - > can i just tape this anywhere into new plenum? or can i go to a catch can instead?

any other info would be much apreciated, im thinking the vac lines would be easy to sort out but i have no idea what to do with the coolant ones.

ive attached 2 photos, one of the bottom of the intake plenum that shows some already threaded holes in the bottom wich i can tap into for some of the vac lines

and the other photo shows the old plenum with the little coolant block thing with 2 x pipes on it.

post-16967-0-34827600-1353159041_thumb.jpg

89CAL Grand Master

89CAL

Posted
Posted

as long as its not the turbo water feed then I think its one thats ok to block off. If you look through the RB25 Greddy install thread then you will probably find most of your answers.

stÖrmy Proficient

stÖrmy

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Posted

cool ill have another proper look tommorow, that greddy install page doesnt help with specifics, its for an rb25 and its also not a tophat plenum like mine, and some parts are very vague, ie : the part where he blocks a hose off with a bolt and doesnt say what the hose is and what it does etc.... but ill look through it some more and see if i can spot anything that will help.

im thinking i may have to drop the plenum of to a shop and get some ports welded onto it.

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