Get a STi to 350-400 WHP - Page 2 - Subaru WRX Forum
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post #16 of 22 Old 12-11-2008, 11:38 AM
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to answer one of your original questions the blitz nur spec is a good exhaust. im pretty sure it has a taper from 3" to 2.5" to mate up with the stock exhaust but im not positive.
i have a friend who runs it with a catless dp and it sounds absolutely amazing. pretty loud though if thats what your looking for.

02 rex is gone.
I defected to an evo :)
Evo is gone :(
Now I got nothing.
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post #17 of 22 Old 07-24-2009, 09:59 PM
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Yea i used to have a blitz nur spec r, and it was so loud, people kept complaning, now i got a turbo xs tbe catless rfl ti, and its still loud just not as loud as a blitz, most people go with invidia now ### its cheaper priced and yet good power, or as they said aps, go more for the stock end look, ### ive gotten pulled over so much for having that massive cannon of exhaust lol, but im also looking to make between 350-400whp, im going with the fp green hta, meth, tgv deletes,external wastegate, tune, injectors, etc, but with a 20g and meth for sure youll tap that 400whp , plus i like the quick buddy got a 20g modded and raced my other buddy that has a rotated 30 and the 20g won , untill end then 30r won lol
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post #18 of 22 Old 07-24-2009, 10:31 PM
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If you think that fart cannon is the limiting factor of a 400 AWHP car you are mistaken. I know 2 STIs making almost 500 AWHP with the Cobb TBE, and thats on a Mustang dyno, no meth.

"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX"
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post #19 of 22 Old 07-25-2009, 12:30 PM
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Ok, I quickly read through the thread (so I may have missed it), but I see some KEY things/suggestions let me be the voice of reason.

350-400whp is your goal and this is going to be a Daily Driver correct?

If so then you must consider reliability. Yes, the stock block can handle 400whp, but for how long and for how much daily abuse. IMHO, you should start be upgrading the block with some forged pistions (i.e. CP Pistons). Reason being is the weak link on the STi block (EJ257) is the stock pistons, and if you want it to be a DD and reliable that is where I would start.

As far as turbo choice, intercooler, etc. I will leave that for you all to discuss (but really is something you should discuss with a reputable/experienced tuner).

Lastly, go for the '05+ STi. '04 is ok but the 5 x 100 hubs are a weak point, as the '05+ has the stronger hubs (less prone to bearing failure) and different/stronger knuckle design.
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post #20 of 22 Old 07-28-2009, 01:25 PM
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If your ripping the block apart for CP pistons....might as well try to find strengthed rods and replace those too. Then you should be able to float a 350-400 whp DD without any problems.
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post #21 of 22 Old 07-28-2009, 03:17 PM
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There's nothing wrong with 5x100 hubs. Maybe your rotors are more expensive and you have SLIGHTLY fewer wheel choices but really, there are lots of 5x100 cars out there and lots of good tire choices. Besides, you then get parts all the WRX guys drool over.

The 05 doesn't have the aluminum control arms I don't think. The hubs are different yes but it gets a more durable shock layout too (rear).

There's pro's and cons to all year STi's.

2015 STi: Still Stock
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post #22 of 22 Old 08-26-2009, 12:51 PM
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Well said

Originally Posted by Phazewun View Post
you can get there with out a turbo upgrade....

Tune TBE intake meth will get you around 350

Finally someone who realizes that you don't have to rip your engine apart to make 350whp. I just picked up an 05 sti with a handful of mods and ran it by my tuning shop. I was told that mid-300s would be a safe tune with my upgrades and that's on a stock turbo with no meth. Granted, I do have catless tbe, a quite large aps front mount, cai, headers, injectors, fuel pump, etc. You get the right modifications and find someone that knows how to do a great tuning job and you can see mid 300s without dropping 3k into your car.

This is my second modified subaru so it's nothing new to me. Half the battle is finding a goal and sticking to it. There are a million options so just pick what's right for you. I'm going meth in a few weeks, but i want that extra kick. But I also don't destroy my engine when I drive it either.

Mid-300s is doable without spending 2 grand.
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