MY01 2.5RS Mod Suggestions
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MY01 2.5RS Mod Suggestions
I recently bought a 2001 Impreza 2.5 RS with no mods on it yet. I'm looking to boost hp without doing anything too drastic (like swapping out the engine).
I'm planning on hooking up the hoodscoop with a cold air intake from PKZero as well as putting in a new muffler. I'm not looking for more sound from the muffler, just better functionality. Any suggestions there?
Any other easy and/or useful mods to give my scooby a little more punch? Thanks.
I'm planning on hooking up the hoodscoop with a cold air intake from PKZero as well as putting in a new muffler. I'm not looking for more sound from the muffler, just better functionality. Any suggestions there?
Any other easy and/or useful mods to give my scooby a little more punch? Thanks.
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Posts: 18,369
From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
see the intake thread for info on the cowl intake based on the Cobb. Probably as good as it gets. But, without getting heads, you will hit the ceiling at about 200 hp with bolt-ons, even with fuel/spark management. That's a lot for an N/A 4 banger, but if you want real speed shell it out for forced induction. And be prepared to break expensive things in your transmission.
real NA power is cams and head work.
but little power is intake and exhaust. I'd get the exhaust and possible TWE headers if i were to start over.
Or just save up for a stage 3 ludespeed kit.
think of your goals, then work around that.
but little power is intake and exhaust. I'd get the exhaust and possible TWE headers if i were to start over.
Or just save up for a stage 3 ludespeed kit.
think of your goals, then work around that.
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Personally I love my setup... If I were to do it again I would not change one bit...
Let's start in the engine bay:
CAI - I bought Larry Ganz's CAI with a drop in K&N filter that alone made me smile. Plus it took no more than 15 mins to put in.(GET ANYTHING everything out there works better than stock. This will also mean that you'll lose some of your low-end power. Don't worry thought because other parts might help or just make it slowly decresse in power.)
UD Pulley - I bought an Unorthodox Pully. All it is a lightweight pulley that replaces the stock crank pully. There are other pulley kits out there I think AEM has one which replaces all the pulleys but I have no experiance with them. Advatanges are better throttle control/feel also slightly faster rev's. (With this mod you'll notice a slight dimming of the headlights at idle. If installed correctlly you will not put any more wear on the other parts or espcially your altinator or battery. Also, people fear with this mod they cannot install a stereo system MYTH! if you do install a big system you'll have parts that retain power so don't worry with this.)
Borla Headers - This you can put on in 30mins lucky us (love the subie). I love these headers because they are so unique. With their uneven lengths they give the muscel car sound and every muscel car owner thinks your a V8. Its great! I know you said you want versitlity over sound but this thing flows nice... If you think otherwise check out Cobb Tuning he uses it in his packages. (Fall back are just like the CAI loss of some low-end power.)
And lastly, the exhaust praise the lord for Stromnung! Buy the Stainless Steel and you'll be proud you spent the money. Get thier Mid pipe and the Dual tips its a nice and non-race'y look. It is bit louder than stock but since our motors have a larger displacement they have a deeper note also with the Borla headers they deepen the note more and then the Stromnung tops it off with their German grunt! (Like the CAI and Headers these all effect the flow of air which lowers the low-end power. Don't be scared, at idle I can get my car to get up and going in 3rd! I don't recomend it nor its not a common pratice but I highly doubt that you can do that in a 4 cyclinder.)
If your setting this up for drag, expect on a cool night (57degs) to do 15 flat... and avg of 15.2, and a 60ft of .879 and avg of 1.0 Its a great for drag racing on the streets. you'll beat all V6's like its your job and have fun with the honda's and other 4 cyinders Nitrous or turbo systems are fun too but you'll have some problems if you don't shift correctly and forget it after 2nd gear (our cars aren't meant for drag)
If your setting this up for Auto-x my car has all the power for close courses but expect to see the red. With all the flow in the world that thin line comes up fast. And shifting into 3rd is just like drag racing... its not fun
If you want more power you're looking into Head work or Cams. Other than that you're also looking into big power and expensive parts breaking in your transmition. With these mild mods you'll be happy and your gas mileage is still close to stock... 19.4 highway and city well most of the time I'm dicking around so I can't really say... but its still better than a owning a V6 or a turbo... This won't void your warrenty plus this makes gives you the cool factor from all crowds... V8 sound and beef to show for it... you'll get much respect...
Let's start in the engine bay:
CAI - I bought Larry Ganz's CAI with a drop in K&N filter that alone made me smile. Plus it took no more than 15 mins to put in.(GET ANYTHING everything out there works better than stock. This will also mean that you'll lose some of your low-end power. Don't worry thought because other parts might help or just make it slowly decresse in power.)
UD Pulley - I bought an Unorthodox Pully. All it is a lightweight pulley that replaces the stock crank pully. There are other pulley kits out there I think AEM has one which replaces all the pulleys but I have no experiance with them. Advatanges are better throttle control/feel also slightly faster rev's. (With this mod you'll notice a slight dimming of the headlights at idle. If installed correctlly you will not put any more wear on the other parts or espcially your altinator or battery. Also, people fear with this mod they cannot install a stereo system MYTH! if you do install a big system you'll have parts that retain power so don't worry with this.)
Borla Headers - This you can put on in 30mins lucky us (love the subie). I love these headers because they are so unique. With their uneven lengths they give the muscel car sound and every muscel car owner thinks your a V8. Its great! I know you said you want versitlity over sound but this thing flows nice... If you think otherwise check out Cobb Tuning he uses it in his packages. (Fall back are just like the CAI loss of some low-end power.)
And lastly, the exhaust praise the lord for Stromnung! Buy the Stainless Steel and you'll be proud you spent the money. Get thier Mid pipe and the Dual tips its a nice and non-race'y look. It is bit louder than stock but since our motors have a larger displacement they have a deeper note also with the Borla headers they deepen the note more and then the Stromnung tops it off with their German grunt! (Like the CAI and Headers these all effect the flow of air which lowers the low-end power. Don't be scared, at idle I can get my car to get up and going in 3rd! I don't recomend it nor its not a common pratice but I highly doubt that you can do that in a 4 cyclinder.)
If your setting this up for drag, expect on a cool night (57degs) to do 15 flat... and avg of 15.2, and a 60ft of .879 and avg of 1.0 Its a great for drag racing on the streets. you'll beat all V6's like its your job and have fun with the honda's and other 4 cyinders Nitrous or turbo systems are fun too but you'll have some problems if you don't shift correctly and forget it after 2nd gear (our cars aren't meant for drag)
If your setting this up for Auto-x my car has all the power for close courses but expect to see the red. With all the flow in the world that thin line comes up fast. And shifting into 3rd is just like drag racing... its not fun
If you want more power you're looking into Head work or Cams. Other than that you're also looking into big power and expensive parts breaking in your transmition. With these mild mods you'll be happy and your gas mileage is still close to stock... 19.4 highway and city well most of the time I'm dicking around so I can't really say... but its still better than a owning a V6 or a turbo... This won't void your warrenty plus this makes gives you the cool factor from all crowds... V8 sound and beef to show for it... you'll get much respect...
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improving the RS
I went to the auto wreckers(a small country yard is cheaper) and picked up a plastic front spoiler from a Chevy (Astro?) van for $5.00. It will probably cost $40. I took it off myself, its cheaper. Everyone says it looks stock and it also does its job. If you want to know how to install e-mail me. Also a multi chamber, 50 series Flowmaster muffler with an add on stainless tip works, and looks really good with the right tip. Its a lot cheaper than a $500.00 muffler. Check out there website for sizes.
Big Baller
iTrader: (1)
Joined: Nov 2002
Posts: 1,821
From: Washington
Car Info: 93 BG5, 00&01 GM6, 06LGT, 07STi
COBB cams are an awesome addition (approx 20HP for 500 bucks). I LOVE MINE. Combined with Borla headers (wrapping them is a must), catless exhaust (results in CEL) and you have one cool sounding RS. My exhaust is a little wierd, but turned out to be great. 2 1/2" (NOT mandrel bent) leaving the headers into a glass pack reduced to 2 1/4 (mandrel bent) to a stromung SS Dual Tip. Very deep and throaty (even deeper with the cams) with no buzz. My exhaust gave me the best of both worlds:Flow AND sound.
I can't properly describe the improvement in acceleration and feel when I added the EXEDY lighweight flywheel. If I had known what the flywheel and cams would do to my car I would have done them FIRST. Shifting is WAY quicker and soooooo smooth, no herky jerky in between gears. The torque is AMAZING, Throttle response is unlike anything I've ever driven with a 4 cyl.
Intake is a K&N filter in stock air box with a PDM intake pipe (similar to GANZ FLOW)
Cams are the cheapest HP for the dollar unless you count a Turbo Kit.
I can't properly describe the improvement in acceleration and feel when I added the EXEDY lighweight flywheel. If I had known what the flywheel and cams would do to my car I would have done them FIRST. Shifting is WAY quicker and soooooo smooth, no herky jerky in between gears. The torque is AMAZING, Throttle response is unlike anything I've ever driven with a 4 cyl.
Intake is a K&N filter in stock air box with a PDM intake pipe (similar to GANZ FLOW)
Cams are the cheapest HP for the dollar unless you count a Turbo Kit.
Big Baller
iTrader: (1)
Joined: Nov 2002
Posts: 1,821
From: Washington
Car Info: 93 BG5, 00&01 GM6, 06LGT, 07STi
here's an attempt at a video with the exhaust sound.
http://home.hawaii.rr.com/dtitan/MOV01030.MPG
the mic was a little to close to the exhaust. I'll have to try again later.
http://home.hawaii.rr.com/dtitan/MOV01030.MPG
the mic was a little to close to the exhaust. I'll have to try again later.
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i have the same problem
hi
i also have a 2001 subaru impreza rs and was wondering what i should do to it. i have the ganza flow cai with the k&n filter i have 5zigen catback exhaust. what would be the best next step in making good hp gains. (not quite to sure about headers cause they break i hear).
i also have a 2001 subaru impreza rs and was wondering what i should do to it. i have the ganza flow cai with the k&n filter i have 5zigen catback exhaust. what would be the best next step in making good hp gains. (not quite to sure about headers cause they break i hear).
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I would go as far as to say the break... my defintion of break is something that won't work anymore....
Headers don't break... the crack.... do they still work??? YES... will you notice anything... not really (driving-wise) you'll notice that the CEL is on more than usual but it won't effect anything...
Also another way that you'll notice is if you have it on a lift and look for cracks... but that's it...
Borla 4th gen headers shouldn't *Crack also they have a lifetime warrenty so if you notice anything like Cracks you can have them replaced...
Next best thing would be UD pulleys or any pulley kits...
after that I'd go Cams and head work but... don't be suprised when you see the prices of product and labor...
Headers don't break... the crack.... do they still work??? YES... will you notice anything... not really (driving-wise) you'll notice that the CEL is on more than usual but it won't effect anything...
Also another way that you'll notice is if you have it on a lift and look for cracks... but that's it...
Borla 4th gen headers shouldn't *Crack also they have a lifetime warrenty so if you notice anything like Cracks you can have them replaced...
Next best thing would be UD pulleys or any pulley kits...
after that I'd go Cams and head work but... don't be suprised when you see the prices of product and labor...
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Joined: Nov 2002
Posts: 18,369
From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
YEah, the new Borlas should be just fine, and headers are the only other place left besides cams/heads to get power. With the Borlas, you will probably be over 185 at the crank, and the sound will improve tremendously.
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Joined: Nov 2002
Posts: 18,369
From: Reno, NV
Car Info: 1993/2000/2001 GF4 mostly red
Re: 99 2.5rs
Originally posted by triman_82
I have a 99 2.5 rs instead of a 01 2.5. Wondering if all the mods work the same way?
Thanx
I have a 99 2.5 rs instead of a 01 2.5. Wondering if all the mods work the same way?
Thanx