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Old 05-24-2008, 09:52 PM   #1
Sti_044
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Join Date: Apr 2007
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91 Legacy SS
Red

Default help me mod my (STB) Legacy SS

ok, my first car was a 93 legacy wagon so im familiar withthe handling interior, everything else, but then i saw an mr2 for a really good deal, so i bought it and about a year later ended up hitting an old lady in her hyundai . so that means im on the lookout for a turbo 5 speed sedan!!. lol ive been trying to do some research, and im hoping to get 1 of 2, 92 legacy sedan 5 speeds. The one im really hoping to get http://bbs.legacycentral.org/viewtopic.php?t=35946 ).

ok so first off i was wondering what some reltively cheap, yet efficient mods would be. Im looking to definately gain some HP, sound, and MPG.

i definately know i want an amazing sounding BOV, any ideas on which would sound good for this car?

it already has exhaust set up, clutch, etc as you can see so im not too worried about any of that.

also what would be a good turbo to swap in to gain some pretty serious HP without damaging the engine or anything else? Im going to be using it as a DD if i do get it, but definately want to be able to show the locals that these have some serious potential.
any advice/help is much appreciated, thanks guys
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Old 05-24-2008, 10:06 PM   #2
BrysImpreza
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Quote:
Originally Posted by Sti_044 View Post
ok, my first car was a 93 legacy wagon so im familiar withthe handling interior, everything else, but then i saw an mr2 for a really good deal, so i bought it and about a year later ended up hitting an old lady in her hyundai . so that means im on the lookout for a turbo 5 speed sedan!!. lol ive been trying to do some research, and im hoping to get 1 of 2, 92 legacy sedan 5 speeds. The one im really hoping to get http://bbs.legacycentral.org/viewtopic.php?t=35946 ).

ok so first off i was wondering what some reltively cheap, yet efficient mods would be. Im looking to definately gain some HP, sound, and MPG.

i definately know i want an amazing sounding BOV, any ideas on which would sound good for this car?

it already has exhaust set up, clutch, etc as you can see so im not too worried about any of that.

also what would be a good turbo to swap in to gain some pretty serious HP without damaging the engine or anything else? Im going to be using it as a DD if i do get it, but definately want to be able to show the locals that these have some serious potential.
any advice/help is much appreciated, thanks guys
ok #1. Modding will make your MPG go WAAAAAY down

#2. That car has over 200K on it over 150K on the motor, if you mod anything on that car, it will last about a week before you have serious issues.

#3. Read up the basics of a BOV on a Subaru, you're going to run stupid rich and do damage in a short amount of time.

#4. If you plan on doing ANYTHING to this car other than change the oil, plugs and fuel filter, you are going to have to rebuild the block, inside to out. This is not going to be a good "cheap" investment in any way shape or form, the 2.2 block was solid, but you are looking for cheap power gains and trying to get alot of power on the cheap, this is not the car.

If you wanna be fast for cheap, go buy an old DSM, AWD, Turbo and easy to make go fast.
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Old 05-24-2008, 10:18 PM   #3
Hondaslayer
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Originally Posted by BrysImpreza View Post
ok #1. Modding will make your MPG go WAAAAAY down

#2. That car has over 200K on it over 150K on the motor, if you mod anything on that car, it will last about a week before you have serious issues.

#3. Read up the basics of a BOV on a Subaru, you're going to run stupid rich and do damage in a short amount of time.

#4. If you plan on doing ANYTHING to this car other than change the oil, plugs and fuel filter, you are going to have to rebuild the block, inside to out. This is not going to be a good "cheap" investment in any way shape or form, the 2.2 block was solid, but you are looking for cheap power gains and trying to get alot of power on the cheap, this is not the car.

If you wanna be fast for cheap, go buy an old DSM, AWD, Turbo and easy to make go fast.
#1: Yes, agreed.

#2: There is not much that can be done to that engine that will make it grenade in short order even at that mileage. A stock TD04 off a WRX will work well, you will just need to fab up an intake for it.

#3: On most newer Subies yes, on the older ones there is no pre-cat and the ecm is pretty stupid so really no worries about damage there (granted a BOV is simply a waste of money) also, the Legacy uses a pretty unique Bosch by pass valve, I do not think I have seen any aftermarket noise makers for it.

#4: The block will likely be fine, it's the heads that are the limiting factor for this engine. However, if you are going to be working on the heads might as well throw in some good pistons and rings while you are in there.

That said, you can pick up some small power gains with a full exhaust, TD04, intercooler and piggyback controllers (remember, the ecm is pretty stupid) however I doubt it would put you much beyond 200hp (if that!) due to those crappy heads. It would certainly be fun to drive though!
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Old 05-24-2008, 10:27 PM   #4
Sti_044
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ya, so i mean how much HP would u think it has about now? should i just drive it the way it is for now and then once then engine dies on me swap a lower mileage one in there and mod that 1? like i said i dont really care about having extreme power or anything, but i want it to sound like a suby, and be decently fast. but with the mods he has on there i would think that it would already be pretty damn fast. so if i leave it the way it is, would i be able to run it hard (when a civic tries showing off at a light)? lol. i know my 93 wagon could take a beating and it had 170k on there.
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Old 05-24-2008, 10:30 PM   #5
Sti_044
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i know that a legacy turbo is the car i want i LOVED my subaru but it would have been nice to be a little bit faster (which im sure the sport version filled in quite well). so if i do buy this it would still last quite awhile, as long as i kept up on maintainance? i plan on getting a check up at my mechanic every 6 months at least considering the mileage and anything that i can fix before it causes more damage the better. i mean i guess this car already has everything i would need. nice exhaust, turbo, AWD, subaru reliability, etc...
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Old 05-24-2008, 10:45 PM   #6
Hondaslayer
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I would guesstimate around 165 maybe 170 hp and probably 180-190 lbft.
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Old 05-24-2008, 11:01 PM   #7
Sti_044
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o thats more than ive had on any of my other cars lol. do you think it would be pretty reliable with what he has set up on there? speed, sound, and looks are great, but reliability and getting to work to pay the bills are obviously more important. thanks for your help guys. if that is a decent set up i will just leave it how it is until i can do alot more research and figure out what i want to do
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Old 05-24-2008, 11:44 PM   #8
Hondaslayer
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It'll work, but I would personally ditch the 3in exhaust and try to get a 2.5in as that 3in is a bit overkill for that tiny turbo, you will get better low end response and drive ability.

That said, it will work.
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Old 05-24-2008, 11:51 PM   #9
Sti_044
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is there a bigger turbo you would reccomend? considering reliability as the main factor?
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Old 05-24-2008, 11:58 PM   #10
ReubenH
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If you are prepared for it, buy it, and rebuild the engine. Rebore the block, chuck a new crank in, some forged rods and pistons... What i would do, if i had a money tree or two in my back yard, is find some DOHC turbo heads, and go nut's with those. anything JDM turbo before 2001 would do the job, the older the easier to work with (pre 98 STi/GTB would be best IMHO). And turbo? if you rebuild anything goes.


Modding that engine as is now, is a recipe for pain, despite their reputation for indestructibility. Turbo wise, TD05 or VF8 are both larger JDM 2L turbo's for that generation. Yes, the VF8 is larger than the VF10.
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Old 05-25-2008, 12:17 AM   #11
Sti_044
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so would a vf8 just bolt right on? is there anything else i would have to do in order to get it going if i did put it on there? and IF i did it wouldnt decrease the reliability of the engine? or shorten the engine life (if maintained)? your guys' help is much appreciated, i love learning about cars especially subarus, but my experience is very limited when it comes to mechanical work and such
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Old 05-25-2008, 04:44 AM   #12
ReubenH
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Originally Posted by Sti_044 View Post
so would a vf8 just bolt right on? is there anything else i would have to do in order to get it going if i did put it on there? and IF i did it wouldnt decrease the reliability of the engine? or shorten the engine life (if maintained)? your guys' help is much appreciated, i love learning about cars especially subarus, but my experience is very limited when it comes to mechanical work and such
Well consider the VF8 was the stock turbo for the JDM RS and GT... Maybe RS-R? I actually have no idea, all i know is it came with the gen 1's in some cases. It may infact be the turbo that car already has! But a VF8 or TD05 would both be bolt on turbo's, and both would run just fine. Note that the TD05's come with both a normal compressor inlet, and an inlet that bends 90 to the side. the gen 1s use the 90 bend turbo's.
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Old 05-26-2008, 05:48 PM   #13
westy66
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dont bother, youre going to be looking at big coin to fab and acquire the stuff needed to do that car right. easilly more than youre paying for it.

get a wrx

unless youre really into that body style. which i think is sweet tho!
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Old 05-26-2008, 07:20 PM   #14
Sti_044
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cant afford a wrx, but i love the turbo legacy sleeper look (for ppl who dont know what it is and its capabilities). like the most i would ever imagine wanting is maybe 3 or 400 HP, but that would be WAY down the road just want a quick dd for now
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Old 05-26-2008, 08:12 PM   #15
ReubenH
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To be honest, i think it's fine as is.
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Old 05-27-2008, 12:15 AM   #16
Sti_044
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ya thats what ive honestly been thinking the last few days, ill take it to the rally meets and just take in any suggestions i get from other owners but other than that ill just get a stereo and tint and everything
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Old 05-27-2008, 08:56 AM   #17
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The mods you should be thinking about are converting to a WRX coolant reservoir because if the stock one isnt leaking already it will break soon. Also re doing the vacuum system is a good idea, you dont need to use silicon hose, just replace with new rubber vac hose.

If you want a BOV just unplug the recirc hose and block that and see how it runs. IT will be sh* t but sounds kinda cool. You dont have an up pipe cat so it wont hurt the turbo/engine it will just run funny and waste a little gas.
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