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New 09 WRX Build

4.4K views 16 replies 4 participants last post by  WVRex2010  
#1 ·
This is my first big car build an I am shooting for 300 hp to the crank (not whp). My car is a 09 wrx hatch red with the 5 speed Manual.
The parts I have picked out are for 300 crank hp because I will be keeping the stock turbocharger for a little bit I know I cant really push more.
Build looks like this

ETS FMIC
Cobb Cattless downpipe
Tomi Unequal Length Headers
Cobb 3-Port boost controller
Cobb 1050cc Injectors
Perrin BOV
AEM High Fuel Pump
Exedy Stage 1 Clutch

I know this build does have some room
For more power Flex Fuel, bigger turbo Etc.But the trans is the limitation. But any suggestions for the build at this point I am open for criticism. Thx
 
#3 ·
Many of the things in your list are not needed and will literally do nothing.

Here is your list, but with a few changes. You don't need a FMIC, you most definitely do not need a BOV, as they can cause damage to the car. You are missing out on a lot of power by going unequal length manifold. Equal length manifold is the only exhaust manifold to consider. IF you cannot live without the current exhaust note, leave the stock manifold on there and save some money.

Grimmspeed/process west TMIC
Cobb Catless downpipe
EQUAL Length Headers
Cobb 3-Port boost controller
Cobb 1050cc Injectors
AEM High Fuel Pump
Exedy Stage 1 Clutch
Uppipe for external wastegate w/ dump tube (see grimmspeed uppipe)
Tial 38mm wastegate
 
#5 ·
Many of the things in your list are not needed and will literally do nothing.

Here is your list, but with a few changes. You don't need a FMIC, you most definitely do not need a BOV, as they can cause damage to the car. You are missing out on a lot of power by going unequal length manifold. Equal length manifold is the only exhaust manifold to consider. IF you cannot live without the current exhaust note, leave the stock manifold on there and save some money.

Grimmspeed/process west TMIC
Cobb Catless downpipe
EQUAL Length Headers
Cobb 3-Port boost controller
Cobb 1050cc Injectors
AEM High Fuel Pump
Exedy Stage 1 Clutch
Uppipe for external wastegate w/ dump tube (see grimmspeed uppipe)
Tial 38mm wastegate
Thanks for your advise I didnt think about the FMIC or BOV damaging the car even with a pro tune you think those upgrades are obsolete even if later I go bigger turbo? But that build does make more sense. Thanks for your help.
 
#6 ·
A BOV can damage your car. A fmic wont, but it is a pointless mod. And it all depends with a turbo upgrade. Are you going rotated? Or sticking with a stock location turbo? Most stock location turbos can still utilize a tmic. If you are planning on running a big enough turbo that a tmic will no longer fit, then a fmic makes more sense obviously.

IMO it sounds like you are just throwing parts out there without much thought of your mod plan. You need to sit down and think about your end goal, and what mods you will need to get you there. For example, most of the time a larger turbo, I would say anything larger than a 18g or 20g will require an engine build. As your stock internals will not withstand the abuse of a much larger turbo. And trust me, building an engine is NOT cheap. I know all about it.
 
#9 ·
A BOV can damage your car. A fmic wont, but it is a pointless mod. And it all depends with a turbo upgrade. Are you going rotated? Or sticking with a stock location turbo? Most stock location turbos can still utilize a tmic. If you are planning on running a big enough turbo that a tmic will no longer fit, then a fmic makes more sense obviously.

IMO it sounds like you are just throwing parts out there without much thought of your mod plan. You need to sit down and think about your end goal, and what mods you will need to get you there. For example, most of the time a larger turbo, I would say anything larger than a 18g or 20g will require an engine build. As your stock internals will not withstand the abuse of a much larger turbo. And trust me, building an engine is NOT cheap. I know all about it.
Ya I'm not planning on a big turbo right now the block an internals or the 09 wrx trans could not hold the power. I would have to go forged or sleeve my block, cams etc

Other than that do you think this build? is good besides the front mount switching to the top mount.
At the beginning I said my hp goal was 300 to the crank this will be my daily therefore I dont need 25+ pound of boost right now.
 
#7 ·
So the ultimate question that needs to be answered here is what do you want out of your car? Are you racing it? Just joy riding on the street? How much power do you want to make? All of the answers to these questions will better help us, and you decide the correct mod path and mods to buy.
 
#10 ·
Okay, so it also depends on your budget. Things can get expensive quick. Plus after you factor the price of parts, you need to count the price for labor (unless you are handling the installs yourself), and then a pro tune. There is no off the shelf tune on the cobb accessport that will even begin to cover the mods we are talking here. So a tune from a reputable tuner will be needed. Tunes run anywhere from 200-800 depending on the tuner and what method in which you are tuned (dyno tune, or e-tune)

But with now rereading the first post and getting a little more information, I would suggest the following mods going off of the parts list you originally posted:

-Catted downpipe
-catback of your choice
-aem intake
-grimmspeed or process west top mount intercooler
-grimmspeed 3 port electronic boost control solenoid
-grimmspeed uppipe for external wastegate
-tial 38mm wastegate
-ID (or cobb, same thing) 1050x injectors
-AEM 340lph fuel pump
-pro tune from reputable tuner

Now all of this on your stock turbo with a good tune will put you over 300whp. On average between 300-330whp is gained with similar bolt on's and stock turbo on pump 93 gas.

If you want to stay under, or around 300whp, I would take away the uppipe for external wastegate, the tial wastegate, and the injectors and pump. Leaving the rest with a good tune should net you around the 300whp depending on the dyno used.
 
#15 ·
I have a 2010 wrx with turboback exhaust, tgv/egr deletes, fuel pump and cobb sr intake and on TPGs dyno I made 321whp 319wtq on 93oct. Im on Stock intercooler stock boost control at that power level. If you have a 5000 budget those mods if you install yourself and get a solid dyno tune will only cost not even half of your budget. (Especially if you buy things like Downpipe on the forums) I would advise you take the other half of that budget and upgrade to some SS Lines, Rotors and better Pads. Then depending on what you have left over Throw a solid set of summer tires on OR coilovers if you can swing them, but not cheap ones. Im running KW Variant 1s and love them. For a daily that amount of power is all you need, I live in rural WV and on my daily commute to work I couldn't imagine needing more than the 321/319 I have. I of course plan on upgrading injectors/intercooler/boost control at some point. But moral of the story is you can get a solid baseline and fun daily driver for the amount of money you have to spend. Then do more upgrades in the future when money/time permits.
 
#17 ·
Hey buddy, yeah been quiet for a while thew a rod in the subie, did the whole built block stage 1 heads etc, just like what you were doing, so lots of overtime to pay for things and doing all the work myself, sans motor build (Credit to TPG) on that. But all is good buddy, shoot me a message sometime we can hook up when the weather clears up and go for a cruise!