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Old 08-29-2007, 11:22 AM   #1
ScoobyDrooler
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Default Boost controllers and other mods... how do they affect the car?

I am looking at buying a used 04 WRX.

The car is currently stock but has had the following mods:
a helix catless downpipe, a greddy e01 boost controller, a greddy turbo timer, a turbo xs rfl bov, a injen cai intake, and 2.5in straight piping w/ muffler.

The car has around 70k miles so I am curious what problems there could be, or if there is anything I should be looking for?

From what I understand the car has never been raced/tracked or rallied...?

Comments?
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Old 08-29-2007, 12:09 PM   #2
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Quote:
Originally Posted by ScoobyDrooler View Post
Comments?
Two comments:

(1) It's an '04 with a MBC, TBE, intake, BOV, turbo timer and no apparent EM/tune. Basically, this car couldn't have been modded any more incorrectly.

The car is a disaster waiting to happen, and probably runs like poo.

(2) Read THIS. All of it.
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Old 08-29-2007, 12:14 PM   #3
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Quote:
Originally Posted by ScoobyDrooler View Post
I am looking at buying a used 04 WRX.

The car is currently stock but has had the following mods:
a helix catless downpipe, a greddy e01 boost controller, a greddy turbo timer, a turbo xs rfl bov, a injen cai intake, and 2.5in straight piping w/ muffler.

The car has around 70k miles so I am curious what problems there could be, or if there is anything I should be looking for?

From what I understand the car has never been raced/tracked or rallied...?

Comments?
2.5in piping?!?!?! ditch the pea shooter and run 3in. Also get an EM asap to tune for the parts that are already installed. Get rid of the E01 and buy an EM, sell the turbo timer and get an up pipe.

Last edited by B00st3dWRX; 08-29-2007 at 05:19 PM.
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Old 08-29-2007, 12:23 PM   #4
ScoobyDrooler
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Quote:
Originally Posted by B00st3dWRX View Post
2.5in piping?!?!?! ditch the pea shooter and run 3in. Also get an EM asap to tune for the parts that are already installed.

The EBC was only on for about 10k miles... All the mods have been taken off, except the exhaust pipeing...

And by EM you mean get an engine management system? What will that set me back?
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Old 08-29-2007, 12:29 PM   #5
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Old 08-29-2007, 12:52 PM   #6
ScoobyDrooler
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Sorry maybe a dumb question but what is MBC?

And I've read about the 04/05 WRX's having an issue with boost controllers or something...

something about the open/closed loop delay???

what is this?
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Old 08-29-2007, 01:00 PM   #7
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MBC = Manual Boost Control: it bypasses the ECU's boost control, which can either be a very good thing or a very bad thing, depending on the tune and the self-control of the user.

MBCs and DPs are a big no-no on '04+ WRXs due to a delay in fueling when the car gets into boost (emissions control bullcrap). If you increase the boost or breathing of the engine without the ability to add more fuel quickly enough, you're going to have trouble.
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Old 08-29-2007, 02:52 PM   #8
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There is no problem with that. As long as your fuel and most importantly, your timing is also being adjusted accordingly.
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Old 09-10-2007, 04:20 PM   #9
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So just to be clear... Currently the car is stock except the 2.5 pipe and Magnaflow exhaust.

i want to add a DP and do the AP reflash for stage 2... anything else I'm missing? Will I need bigger injectors or anything else?
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Old 09-10-2007, 04:30 PM   #10
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Quote:
Originally Posted by ScoobyDrooler View Post
So just to be clear... Currently the car is stock except the 2.5 pipe and Magnaflow exhaust.

i want to add a DP and do the AP reflash for stage 2... anything else I'm missing? Will I need bigger injectors or anything else?
Cobb has very detailed notes on what works for their off-the shelf maps check their website to verify.

Also the Enginuity is becoming more popular and much cheaper option ($90 for the cable, free software + your laptop) and you can tune it yourself or buy maps.

I'm in the market for a UTEC personally. Beyond stage II it has more abilities that can't be matched by flashing the stock ECU.
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Old 09-10-2007, 04:31 PM   #11
ScoobyDrooler
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Enginuity? Is this like an AP?

Where can you get it?
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Old 09-10-2007, 04:54 PM   #12
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Quote:
Originally Posted by ScoobyDrooler View Post
Enginuity? Is this like an AP?

Where can you get it?
If you want to take the risk of doing it yourself. Enginuity is an open source (free) software that allows you to flash your ECU and do your own tuning. Off the shelf maps are available for sale and you can find some free.

You only need a Tactrix ODBII cable (get the one with reflash connectors) and a laptop.

http://www.enginuity.org/

This will not give you all the features/safety of UTEC or conveinence of AP. No gaurantees, but many happy users. Do your research in the engine management section of NASIOC and the enginuity site. It may save you a lot of money.
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Old 09-10-2007, 06:04 PM   #13
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take the car to a subaru specialist and have them check over the car with a fine tooth comb, checking compression, leakdown, etc etc. They will be the ones to tell you what the condition of the car is.
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Old 09-10-2007, 06:11 PM   #14
ScoobyDrooler
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I had the compression done, but not a leakdown?

compression came back all mid 150's one was a little lower but still within the 10% margin.

How much for this leaktest?

I assume it checks all fliuds and seals... what about the turbo... will it check for a boost leak?
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