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Old 27 September 2009, 07:57 AM
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noblechris
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Default top mount question

as you may be aware from previous questions, i am a bit of a novice with cars....

brought this top mount off someone who said it came with everything for direct replacement, mine has the angled tm.
so first question: whats the pipe on the right of the new tmic for?
and second: wheres the dump valve go?
Old 27 September 2009, 08:11 AM
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Shaks-STI
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hi mate thats for the reserculater valve ( dump valve) on your car will be on the left hand side
Old 27 September 2009, 08:16 AM
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noblechris
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my current tmic doesn't have the right hand pipe, where do i put the new one, or does it need blanking off?
so the red pipe pictured on the new tmic needs to be replaced for one with a pipe coming out for the dump valve?
Old 27 September 2009, 09:30 AM
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scoobeenut
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Hope your going to do something about the fins on that intercooler?
Old 27 September 2009, 09:38 AM
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w13dle
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theres a guide here mate https://www.scoobynet.com/projects-4...-my95-wrx.html i think theres abit of involved still to make it fit not just a straight swap
Old 27 September 2009, 11:49 AM
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arumdevil
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the red hose comes from the turbo, the black hose on the right is ususally to a recirc valve and the big black hose in the middle goes to the throttle body.

Those fins want straitening or it won't do it's job very well!
Old 27 September 2009, 02:06 PM
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joz8968
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If you want to reuse your 1995 OEM "180deg" recirc DV, you'll need a silicone reducer hose. It'll be either a '34mm-to-19/20mm' or '32mm-to-19/30mm' ID -- can't remember the OD of the STi v.3/4 IC's curved DV port (on extreme RHS as you look at the pic).

You'll then need a bit of 19/20mm ID flexi silicone hose and a 19/20mm OD ally joiner, to recirc the DV's other recirc outlet port back across the bay and to turbo intake's recirc inlet port.

You'll find that the DV elbow on the new IC will foul with your ISCV though ...

Last edited by joz8968; 27 September 2009 at 02:16 PM.
Old 28 September 2009, 08:18 AM
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noblechris
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Originally Posted by joz8968
You'll find that the DV elbow on the new IC will foul with your ISCV though ...
how am i supposed to fit this new tmic without this problem? what is iscv?
Old 28 September 2009, 08:52 AM
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arumdevil
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idle stabile control valve? (guess). While I'm here, does anyone know if an STi top-mount can be fitted to a legacy GT-B twin turbo?
Old 28 September 2009, 11:34 AM
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mit
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That is a sti 3/4 tmic, so the guide above is no good.
The pipe on the right will hit the idle control valve. You need to cut it off, and weld it closed.
Also, you'll need to figure a way of fitting the dump valve, as it won't have a pipe for it now. You could run without one mind, a few on here do.
Old 28 September 2009, 12:17 PM
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mach
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you need a silicone version 1 samco(or equivalent)tubo hose,it will fit on the Y pipe and allow you to use the existing dump valve.before you get well into it though take of the slanty intercooler and measure the gap as you'll find it's a bit of a squeeze.version 1 manifold's make it a pig of a fit.had to major adapt a new age one to fit it to my v1
Old 09 October 2009, 03:17 PM
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noblechris
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right so i understand i have to cut the pipe on the right side and weld it over....

the red elbow in the picture i need with a t-piece for the dump valve, where do i find this?
have looked everywhere
Old 09 October 2009, 03:42 PM
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joz8968
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Unfortunately, they're quite rare on their own (as, understandably, people flog 'em WITH the IC). But I did see one on eBay the other day funnily enough...

Last edited by joz8968; 09 October 2009 at 03:43 PM.
Old 09 October 2009, 03:57 PM
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noblechris
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is there a name for it?
what would i search for as all the newer top mounts seem to not have the elbow with a dump valve bit
Old 09 October 2009, 04:03 PM
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joz8968
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Do 4 searches (just stick to "All categories"):-

"subaru hose"
"subaru pipe"
"impreza hose"
"impreza pipe"

If nothing comes up, it's not for trying
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