motor ? - Subaru WRX Forum
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#1 Old 01-25-2007, 03:05 PM
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motor ?

ok im new to wrx and i'm thinking about getting one. i read all about how the trans dont hold up to much. But if i get one i would want to end up building the moter not swap the sti motor in there. do people do that or just buy sti motors and build those let me know thanks. i gussy what i;m asking is can you build a wrx motor to like 700 awhp or not
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#2 Old 01-26-2007, 03:40 PM
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You can build the EJ20 (2.0L) with no problems as long as you keep your car tuned well...the tranny will hold up well as long as you don't treat it badly...one of my WRX's has the full STI swap with the stock 5 speed in it still (2002 model) and it has held up just fine...


What kinda power/Racing/goals do you have for the car you're going to buy?

"Life's a bowl of punch so go ahead and Spike it!" -311
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#3 Old 01-26-2007, 04:01 PM
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Thanks dude. Well if i get one i'm thing get cat back, up pipe ,down pipe. then a utec, maybe a intake. then turn up boost. and thing that go with that then save up for a new trans/ gears then build the motor then turbo. i would like to get in to 12's at some point
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#4 Old 01-28-2007, 05:27 PM
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well your on the right track with your exhaust ideas and your engine management, just stay away from boost controllers cause thats wut it sounded like u wanted...with just the exhaust and the utec and a protune your car is gonna be ridiculously faster than stock
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#5 Old 01-28-2007, 09:41 PM
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i want a clean one. maybe cf lip and hood. damn it i need to get one
what year should i look at. and cant the utec be boost controller to
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#6 Old 01-29-2007, 03:14 PM
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Here is my input.. To do what you ask, 700whp or more obtainable.. 12s, you would be better off dropping the extra cash (1500) for the 2.5L short block. To get Big HP numbers your going to have to invest in forged internals, i.e. pistons, rods.. If your going to invest in all that work and time anyway you might as well go for the extra TQ that comes with the 2.5L block.. You can use everything else off the stock 2.0L motor, i.e. the heads, accessories, everything... I did.. I'm putting dowm over 400 now with a conservative tune and look forward to close to 600 once I get retuned.. Check out my profile for a list of mods...

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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#7 Old 01-29-2007, 03:41 PM
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Are you talking about the sti motor. if so dont you have to change a lot of stuff. How much hp can a stock 2.5 l motor hold
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#8 Old 01-29-2007, 06:11 PM
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Well, yes I'm talking about the STI "Short Block".. Only the Block, Crank, Rods, and Pistons.. I only swapped out the pistons in mine and I was able to push 24 psi, however I didn't gain any power from 21 to 24 becuase of my restrictive TMIC which I just took off, however I had an oil line blow and she didn't lube well and I ended up with a cracked cylindar but all (3) shops that I deal with for help all said the same thing.. "I never saw that happen before with an STI Block".. I deal with Axis Power Racing, Element Tuning, and AndreTech Automotive so I'm working with guys that Know Subarus.. Anyway, with a stock STI short block you can be at 400+ no issues with tuning and turbo... If you go meth you can be at 500 easy with no internal work, but for 400 pistons can't hurt any.. The stockers are only "Suggested" be used to 21 psi.. After that they have been known to crack.. That is why I went with CP Forged Pistons...


Edit.. NO, all you have to change is the block. I would suggest upgrading Injectors as well, Pinks would be fine and you can pick them up easily and cheaply.. DON"T try modding your own like guys will probably suggest you do.. Fuel is VERY dangerous, if you get it wrong everything you work for will be GONE... I lost my first build up (a 2.0 block) to a leaking fuel injector and the same effect can occur with a poorly modded stocker... Spend the little cash to have it professionaly done or buy pinks if you plan to run the stock turbo, if not 800s are popular and will flow enough for most turbos for the WRX...

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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#9 Old 01-29-2007, 11:33 PM
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well i need a car first then i will work it all out. but thanks. yea about what hp is need for 11's
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#10 Old 01-30-2007, 05:56 PM
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11s... Well, that depends, high 11s, mid 11s, or low 11s there is a big differance in power required for the variences.. The simple bolt on of an Ultimate Racing Stage 5 GT30R on the stock 2.0L block is "suposed" to be able to hit 11.8 in the quater, I'm in high 10s, low 11s (should be anyway) with 425whp...

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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#11 Old 01-30-2007, 06:07 PM
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wait so mid 11;s with around 425. do you have lsd
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#12 Old 02-01-2007, 05:00 PM
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Well, with 425whp I'm high 10s / low 11s... 380ish should be high 11s.. But this all depends on driver and power band.. As for the LSD, Yes I have a PPG Front LSD and a Kaaz Rear LSD..

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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#13 Old 02-01-2007, 07:17 PM
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cool thanks
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#14 Old 02-01-2007, 09:07 PM
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yea but shoaf has like 20+ grand in his car with all the labor done by him remember that part. his cars sick though. theres a vid around here where he was running with a 2.5rs and stalled it on the launch and the cam follows the rs and then right before the finishline you see shoaf go ripping past at like 135 mph. it was sweet.

Robby
02 rex is gone.
I defected to an evo :)
Evo is gone :(
Now I got nothing.
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#15 Old 02-01-2007, 09:13 PM
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i need to get a car first. but the more i think the more i want to push the limits of the car
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