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Old 12-05-2004, 12:48 PM   #1
scott93subarulegacy
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Default Saab 900 ic

I have a saab ic that i want to install on my subaru. Could i put an after market bov on it and if i do what would i do with the tube that connects to the box right before the air filter that goes to the stock bov.
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Old 12-06-2004, 02:13 AM   #2
ncarn8
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the old hose before the air filter? or after the afm? if its after the afm
block the old hose unless you want to plumb the new bov back.
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Old 12-06-2004, 11:04 AM   #3
BrysImpreza
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I used a Mazda RX-7 Stock one when I used my Saab 900 IC, it's an in-line bypass valve made by Denso.

Another option since the lines going to the IC are plastic, take a short, straight section of piping from the turbo to IC inlet and make a bracket for any BOV that will fit in place.

I'll dig up a pic of the BOV I used this afternoon.
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Old 12-06-2004, 05:14 PM   #4
scott93subarulegacy
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ok thanks.
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Old 12-08-2004, 01:09 PM   #5
vrg3
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I used a blowoff valve from a 1st-generation DSM, with the pipe that it fits on. That pipe has a neat little bend at the end that works very well for the stock Legacy Turbo setup. An upper radiator hose from a 92 Civic fits pretty well between the BOV's outlet and the stock return bung; it just fits on the outside instead of the inside of the return bung:

http://www.graphics.cornell.edu/~v/p...aru_legacy.jpg
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Old 12-08-2004, 10:20 PM   #6
scott93subarulegacy
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does that bov end up hitting the hood?
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Old 12-08-2004, 10:29 PM   #7
vrg3
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It's pretty close, but it doesn't touch the hood. Actually, it sits directly under the hood scoop. You can see it through the scoop when the hood is closed.

The stock manifold pressure line reaches it neatly too.
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Old 12-08-2004, 10:34 PM   #8
scott93subarulegacy
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Thanks how much pressure can you run with the intercooler?
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Old 12-08-2004, 10:57 PM   #9
scott93subarulegacy
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also what size is the connecting tubes that go from the intercooler to the pipe?
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Old 12-08-2004, 11:08 PM   #10
vrg3
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What I've got in that picture is a near-perfect fit. The compressor connects to the pipe with a short piece of 1-3/4" radiator hose. The pipe connects to the intercooler with a 1-3/4"-to-2-1/4" coupler. The intercooler connects to the throttle body with a 2-3/8"-to-2-3/4" coupler.

Those sizes match almost perfectly, but you can get away with using simpler/cheaper stuff if you keep an eye on it and keep spares handy. For a while I was using a cheap AutoZone 2-1/2"-to-3"coupler to connect to the throttle body and a 2" pipe sewer drain coupler from the hardware store to connect the pipe to the intercooler; they both required the clamps to be cinched down pretty tight, but they worked. The sewer coupler isn't rated for pressure, heat, or oil, though, so it gave up after a couple thousand miles and maybe a dozen runs down the drag strip. I wish I'd kept a spare handy that race day.
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