Is it possible to get over 200hp out of the stock 165hp engine on my 2000 Impreza 2.5RS? I dont want to make it turbo because then you have to either replace the engine, or put many hours of work into the stock engine to get it so that it wont blow out after a while.

well on your way to get 200+bhp N|A you will need to work on the same principles in getting a reliable turbo setup.
E.G stronger pistons, block, possibly a port/polish, ems....

im sure im missing some more stuff, N|A tuners please chime in....?

Originally posted by noob w/ a scoob
Is it possible to get over 200hp out of the stock 165hp engine on my 2000 Impreza 2.5RS? I dont want to make it turbo because then you have to either replace the engine, or put many hours of work into the stock engine to get it so that it wont blow out after a while.

haha i like your name.

but if you say you want to go N/A because its "easyer" or less hours of work your mistaken. you should look into a usdm wrx motor swap, save up and have a shop do it.

or if your really into N/A search the na forums.

1.) This question belongs in the "Normally Aspirated" Tech Section. "Normally Aspirated" = "N/A" = "non-turbo." This "Subaru Conversions" section is for people who are doing motor swaps mostly, converting their car to a different engine than it originally came with.


2.) I found LOTS of info, it took me about a minute, maybe two. I'll share my secret search technique with you:

-1- First open the search page , http://forums.nasioc.com/forums/search.php?s=

-2- If you're looking for 200hp, try typing in "200".
-3- For better results, be sure to focus your search in the "normally aspirated" section of the forums using the drop-down menu.
-4- Change the date to "any date" because Subaru has been building "normally aspirated" cars for a lot longer than 3 months.


Here are just a few of the threads I found, all of them are very informative:


http://forums.nasioc.com/forums/showthread.php?s=&threadid=390419

http://forums.nasioc.com/forums/showthread.php?s=&threadid=412497

http://forums.nasioc.com/forums/showthread.php?s=&threadid=449314


Hope that helps,
-s-

i would say yes easly... but your going to need cams and an aftermarket ecu

eventually cobb is suppose to release a reflash for the RS...

Originally posted by Jaxx
i would say yes easly... but your going to need cams and an aftermarket ecu

eventually cobb is suppose to release a reflash for the RS...

eventually...
:rolleyes: And you don't need an ECU to hit 200 at the crank. Just Cobb spicy cams with bolt ons will hit 200. But tuning never hurt a car...

200 crank hp is pretty easy. that would put you at 165hp to the wheels or thereabouts.

to go more u have to open up the engine.

bang for the buck is a reliable and reputable swap.

i think i might be near 200 at the crank, ive done sprk plugs, intake and exhaust. and headers. just go one step at a time. good luck.

Originally posted by subyrally
i think i might be near 200 at the crank, ive done sprk plugs, intake and exhaust. and headers. just go one step at a time. good luck.

thats optimistic.

Originally posted by RS_to_WRX_swap
thats optimistic.



i try, its still faster than stock, and buttloads faster than my moms car that ive had to drive lately.

you may have 165 + 18 hp in the best possible scenario. That's still only 183 hp.

Originally posted by whtlegacy
you may have 165 + 18 hp in the best possible scenario. That's still only 183 hp.

such a downer, huh?

Get a lightweight flywheel......and you'll notice the difference. ;)

(Moreso than intake/exhaust crap) :D

imo, i think its tough and expensive to reach 200 bhp. and with 200 at the crank, you'd actually only get about 145 awhp. or you can get teh NAWZ

contact "dcoty" and ask him about his car....what a beast!

Originally posted by whtlegacy
you may have 165 + 18 hp in the best possible scenario. That's still only 183 hp.

you're saying exhaust and headers are only 18? should be higher than that. figure those two would be more closer to 25-30. (I think 18 is a whp gain, not crank)

Originally posted by Rebellion
you're saying exhaust and headers are only 18? should be higher than that. figure those two would be more closer to 25-30. (I think 18 is a whp gain, not crank)

i want to agree with that

well the most N/A exhaust gains I've seen are on Patrick Olsen's Legacy dynoed before and after an MRT resonated, hi-flow cat headerback exhaust system. He got something like 14-16 hp/ 14-16 lb/ft torque at the wheels (I can't really remember.) That would be a little higher at the crank.

Subyrally, you claim to have exhaust and intake mods. An intake will be no more than 2-3 hp at best at peak. I just don't see you having +35 hp at the crank. For what it's worth, I'm also running an equal length headerback MRT exhaust and a rallitek intake. I also have a proECM chip. My car is quicker than stock, but I'm still not going to claim it's at 200hp at the crank.