Low end + Mid range HP
Thread Starter
Registered User
iTrader: (1)
Joined: Jul 2008
Posts: 473
From: South Bay
Car Info: 2003 AW WRX - VF39
Hey guys, first time making a thread.
I was wondering what kind of mods can produce some low end and mid range HP.
I usually do autocross or mountain driving so I was trying to get a couple HP to power out of the turns, nothing serious. I could always work on the driver mod as well but I want something to back me up out of the turns like I said.
Thanks in advance.
(feel free to flame)
I was wondering what kind of mods can produce some low end and mid range HP.
I usually do autocross or mountain driving so I was trying to get a couple HP to power out of the turns, nothing serious. I could always work on the driver mod as well but I want something to back me up out of the turns like I said.
Thanks in advance.

(feel free to flame)
Registered User
iTrader: (8)
Joined: Aug 2006
Posts: 3,143
From: SF Bay Area
Car Info: '02 WRX wagon
up-pipe will help boost to kick in a couple hundred rpms faster
down pipe will unlock some extra hp too
consider a light weight crank pulley. supposedly equivalent to removing 100lbs from your car
and there's no reason why we'd flame you, except next time try using the 'search' button
down pipe will unlock some extra hp too
consider a light weight crank pulley. supposedly equivalent to removing 100lbs from your car
and there's no reason why we'd flame you, except next time try using the 'search' button
If you watch rally drivers in action, or do it yourself (I have been both co-driver and driver) they heel-and-toe to keep the motor at 3000+RPM in the turn, keeping the turbo spooled. A catless up-pipe and a good DP will help, but you really need to be at 4000-5000 RPM to come leaping out of that turn at full torque.
Thread Starter
Registered User
iTrader: (1)
Joined: Jul 2008
Posts: 473
From: South Bay
Car Info: 2003 AW WRX - VF39
thanks everyone for their responses so far. Yeah i tried search but alot of things that came up were bigger turbo, but i am trying to steer away from that route right now. i have a titek flex uppipe installed currently. i noticed quicker spool with that right away. sounds like full exhaust is the way to go. but since headers were mentioned does anyone have recommendations of which brand to go?
I hear alot of good things about grimmspeed because they dont crack due to the flex pipe in the middle.
and as far as engine management, is cobb tuner the only option for a quick friendly flash or is there a better choice?
thanks everyone again.
I hear alot of good things about grimmspeed because they dont crack due to the flex pipe in the middle.
and as far as engine management, is cobb tuner the only option for a quick friendly flash or is there a better choice?
thanks everyone again.
Registered User
iTrader: (6)
Joined: Mar 2006
Posts: 9,581
From: on the way to lake tahoe to shread! turbo beast
Car Info: 2016 WRX, 2014 lifter forester XT, 2005 JDM207 WGN
up pipe and a down pipe, a tune from someone good, and for mid end power a good set of headers can help you out
if you're going to get a dp and want that low to midrange torque, go with 2.5 inch. 3 inch is more for top end power. Though there aren't that many aftermarket 2.5 inch dp's to choose from.
Registered User
iTrader: (4)
Joined: Feb 2007
Posts: 2,644
From: SJ
Car Info: 94 Integra beater: one Slow 3 Series RIP EvoX
Registered User
iTrader: (8)
Joined: Aug 2006
Posts: 3,143
From: SF Bay Area
Car Info: '02 WRX wagon
oh and forgot to mention, you can port and polish your TD-04 (stock turbo)
some say its not worth it, but if u dont plan to swap out the turbo, might as well get the most from it
some say its not worth it, but if u dont plan to swap out the turbo, might as well get the most from it
Registered User
iTrader: (4)
Joined: Aug 2008
Posts: 2,127
From: Livermore
Car Info: LUMPY CGM 05 WRX
If you are looking for mis range tourque I would stay with the stock turbo for now. Work on driving style and ust try to stay within your power band or right around 3k rpm while you are in the turn. gear seection its all about gear selection. Maybe work on the suspension so you can carry more speed into the turns to = higher rpm's
Registered User
Joined: Jul 2008
Posts: 1,347
From: 925+415
Car Info: 05 CGM STi to be converted to RS
tomei unequal length headers are nice. I have them on my car and they also come with an uppipe.
if you're going to get a dp and want that low to midrange torque, go with 2.5 inch. 3 inch is more for top end power. Though there aren't that many aftermarket 2.5 inch dp's to choose from.
if you're going to get a dp and want that low to midrange torque, go with 2.5 inch. 3 inch is more for top end power. Though there aren't that many aftermarket 2.5 inch dp's to choose from.


