Mr. Brat Posted January 31, 2010 Share Posted January 31, 2010 I almost have all the part I think I need for my swap. I am down to little things and still in need of an exhuast. What motor ranges and year ranges can I use for the exhuast? Link to comment Share on other sites More sharing options...
Jibs Posted January 31, 2010 Share Posted January 31, 2010 (edited) At some point, you'll have to do some custom exhaust work, The EJ cat hits part of the crossmember near the control arms. Numbchux says to cut and splice the 2 exhaust systems together and is covered somewhere in the writeup with pics. Otherwise, it MAY work if you remove the heat shield around the cat, but because its so close to the axle on that side, I don't want the boot to tear. EDIT: Match the exhaust to the ej you used. Depending on the year, and if its single port/dual port, all exhausts 90-94 should intermingle and possibly later models as well, I am unsure of newer models. Edited January 31, 2010 by Jibs Link to comment Share on other sites More sharing options...
Mr. Brat Posted January 31, 2010 Author Share Posted January 31, 2010 Thanks Jibs, I can cut and weld anything to work. I was just lookin at the header kits on ebay, but all those are for 96 and newer. Didnt know about O2 sensors and all that stuff. Dont really want to run a cat, but still want the motor to be economical being it is my daily driver. I could go to pull-a-part and get the shorty headers cuz they cut the cats out for recycle, and make a y pipe. What about just deleting the O2 sensor? Link to comment Share on other sites More sharing options...
Jibs Posted January 31, 2010 Share Posted January 31, 2010 That depends on your local smog laws and such, so if you don't need to smog, then delete the cat and run a straight pipe all the way back! Link to comment Share on other sites More sharing options...
Mr. Brat Posted January 31, 2010 Author Share Posted January 31, 2010 I dont have smog, but the motor I have is a 95 1.8L. That should have a pre cat o2 sensor right? Even if it is a "pre cat" sensor straight pipe wouldn't matter. I found a cross over pipe, down pipe and tmic for $150. But its out of a 01 impreza, will this fit if I want to turbo this motor? Link to comment Share on other sites More sharing options...
Gloyale Posted January 31, 2010 Share Posted January 31, 2010 The EJ cat hits part of the crossmember near the control arms. Numbchux says to cut and splice the 2 exhaust systems together and is covered somewhere in the writeup with pics. Otherwise, it MAY work if you remove the heat shield around the cat, but because its so close to the axle on that side, I don't want the boot to tear. You should go to a wrecking yard, and get the y-pipe from a 96-99 Outback with 2.5 It will be dual port like your EJ18 and bolt on to the motor perfect. Those years, the y-pipe section is not so offset, both sides sweep into the center, and then the passenger side makes a u-bend and both pipes join at a flange that the Catalytic bolts to. So since the cat will unbolt, the wrecking yard should sell just the front y section. The shape of that y-pipe will clear the radius rod mounts on your EA81. Otherwise, to use an early legacy exhaust, you can go the route I did, and heat and hammer the side area of the cat to get clearance. Probably destroys the honeycomb inside somewhat, but it works. (I did it with a cat that had already "gutted" itself.) Link to comment Share on other sites More sharing options...
Mr. Brat Posted February 1, 2010 Author Share Posted February 1, 2010 I dont think I even need the cat, being my motor is OBD1. But im really wondering about the 01 impreza turbo exhaust. If that will fit or not. I am thinking of turboing the 1.8 with maybe some 2.2l heads to lower the compression ratios. What do ya'll think about that? Link to comment Share on other sites More sharing options...
Gloyale Posted February 1, 2010 Share Posted February 1, 2010 I dont think I even need the cat, being my motor is OBD1. But im really wondering about the 01 impreza turbo exhaust. If that will fit or not. I am thinking of turboing the 1.8 with maybe some 2.2l heads to lower the compression ratios. What do ya'll think about that? Turbo exhaust won't clear without modifying the crossmember. And Also if you don't have a turbo, you'll have a big gap in you're system. 2.2 heads will not lower your compression. they are identical to your EJ18 heads. Keep it simple and within the scope of possibilities for now. Just get a used 95-99 exhaust and go with it. Worry about turbo exhaust AFTER you have a crossmember, a turbo, and an ECU to manage it. Link to comment Share on other sites More sharing options...
Mr. Brat Posted February 1, 2010 Author Share Posted February 1, 2010 Alright, that sounds like a good plan for now. I could make a cross member without a problem. Thought I have read somewhere the 2.2 heads would lower the compression ratios. I guess that would be the 2.2l turbo heads. So if i am understanding this right I can use exhuast headers for a 95-99 outback 2.5 header. Would that be the same as 2.5 RS exhuast? Reason I ask I have found a few header pipes for an 01 and 05 and various years in between. If I am not mistakin OBD1 is only a "pre cat" O2 sensor setup correct? If so I wont even put a cat in it. If I do come across a turbo, exhuast and ECU. What psi could I run without doing any head upgrading? Link to comment Share on other sites More sharing options...
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