what's next....

[wrxbert]

i have an 06 wrx with a k&n filter, perrin maf hose, cobb ap v2, cobb catback.
For fear of boost creep/spike, i dont' want to get a downpipe, so what should i buy next?

[teh DIRT]

id get a downpipe, lol. then get an EWG.

[D Money]

Downpipe.

[CHAOS]

get a downpipe and a tune. im running a 3inch bellmouth DP with no creep issues after the tune

[RyanG]

Down pipe, tune. and have me port your turbo :)

[wrxbert]

knowing how to install a dp and up-pipe, i'd assume i'd have to remove the turbo to have it ported? if i go through that i'd just get a better turbo...unless you can port it while still on teh car?

[TROLL]

you could get a catted dp. i happen to have a new perrin one sitting in my garage :). catted dps dont cause creep...

[wrxbert]

you still have that?? pm me a paypal price.....i'd have to get a flat flange to donut adapter....

[Jourdan]

boost creep is a problem on 06's but i never had one.....go with a uncatted dowpipe and a tune, whether cobb tuned or not(i have a cobb accessport that i NEED to sell for an 06.cheap...so cobb v.2 will be fine.....and monitor your boost levels with a boost boost gauge too...i never had a boost spike /creep problem with my 06. the gains are phenomenal.
ewg on a td04 with a 2.5 liter motor will be minimal, and will make the car drop on its face at like 5,500 rpms(the amount of air going through the turbo is wayyyy too much for its effeciency...so its not worth it.
stage 2 on 2.5l 2006 motor is aweseome....trust me....you will crush alot of cars. the powerband is great.

[teh DIRT]

if you do get a downpipe i have a flat flange to donut adapter :)

[TROLL]

Just to clarify, an EWG cannot hurt performance, its not possible. It can only make boost control more precise and lower backpressure in the exhaust, resulting in more horsepower and avoiding boost creep. However, it doesnt sound like you're looking to get into the EWG game at this point.
A common misconception is that boost creep can be tuned out. It cannot. It is completely a mechanical issue dealing with flow capacity of wastegate vs. flow capacity of exhaust wheel of your turbo. The air will go through the path of least resistance, and at high rpms the small wastegate opening is maxed out and the air instead goes through the exhaust wheel of the turbo, which causes the spool the turbo above desired levels. The only way to fix it is to make the path to the wastegate more direct/efficient by porting, or getting a larger (external) wastegate.
Most 2.5L motors have issues with creep when using a catless downpipe, some dont. I have never heard of boost creep issues when using an aftermarket downpipe with a high flow cat.

[wrxbert]

where can i get more info on ewg? not really familiar with it. I was hoping of getting an sti topmount, vf39 eventually and using cobb's shelf map....i'm sure you guys are going to say that i need to get a custom tune....eventually i will

[STI_wagon]

AN EWG on the stock TD04??? :screwy: IMHO, I would go with a DP, STI Version VII tmic, super 16g, STI pinks, and a protune..

[wrxbert]

AN EWG on the stock TD04??? IMHO, I would go with a DP, STI Version VII tmic, super 16g, STI pinks, and a protune..

don't need the pinks...what's the dif between a 16g and 18g? cobb makes an off the shelf map for teh 18.

[STI_wagon]

don't need the pinks...what's the dif between a 16g and 18g? cobb makes an off the shelf map for teh 18.

You should get them if your going to upgrade your turbo. The 16g flows less than the 18g..


http://www.boostplanet.com/compressorflow.htm

[TROLL]

the injectors on the 06 WRX flow as much as the pinks do, so he doesnt need them. if you're looking for simplicity i'd recommend going with whats recommended for cobbs base map, and i think an 18G would be very nice on your car.
so i guess its either catted downpipe and keep the stock turbo, or go all out and get a new turbo and catless downpipe, and the rest of the goodies.

[wrxbert]

why would i need pinks if the blue's flow almost the same as pinks??

so is the 18g worth the $200 more?

all i need is a dp, sti topmount, turbo (18g)...correct?

[TROLL]

i'm saying you dont need pinks because there would be no point. your stock injectors flow that much.
according to cobb's notes, you need an otherwise stock vehicle with Forced Performance TD05-18G, STi or equivalent TMIC, turboback exhaust, and a stock intake system.
man thats simple to get 293 whp and 293 ft. lbs...
I think you could use any TD05-18G, but I have heard the FP turbos are great for the money. Deadbolt is also great and offers a lot of extras and greaaaaat support, but their turbos are a bit more money.
as far as being 'worth' more... absolutely. with the 2.5L and 18G would be excellent for driving daily... reasonable spool with a huge improvement in top end.
the only other thing to consider would be something like an ecutek reflash, which would get you a custom tune instead of a cobb base map. custom tunes are always better than base maps.

[wrxbert]

thanks troll,

Stupid question, after looking at cobb's maps,
vf39 map = 290 hp
fp18g = 293 hp

doens't seem like much diference?

[TROLL]

i saw that too and it confused me... their graph doesnt have any values for hp but they do look way too similar. the 18G has so much more potential than a VF39. so yeah, i dont get it...

[wrxbert]

i just want to beat a stock sti and evo!!

i'm not looking huge power just better than average i guess.....

[TROLL]

everyone says that, but there are no stock Evos and STis :devil:

[wrxbert]

solid point....

[teh DIRT]

very good point. i said that when i first started building my engine. now i want to beat everyone haha

[wrxbert]

respectable is my goal....but i think my new house is going to become my money pit....i want a deck, paved driveway, new garage.....etc

[STI_wagon]

the injectors on the 06 WRX flow as much as the pinks do, so he doesnt need them. if you're looking for simplicity i'd recommend going with whats recommended for cobbs base map, and i think an 18G would be very nice on your car.
so i guess its either catted downpipe and keep the stock turbo, or go all out and get a new turbo and catless downpipe, and the rest of the goodies.

I didn't know that.

<----06 subaru n00b

[wrxcelration]

Td06s should be used on the 2.5ls...the td05s are designed for the 2.0s

[TROLL]

actually its a td04... td05s are used on 16Gs and 18Gs and then 20Gs are either td05s or some are td06s... and they are quite large

[wrxcelration]

yes i know stock turbo is a td04 but what i was tryin to say is if he upgrades he should run a td06

[TROLL]

ohhhhh i see now. well an 18G would be a great upgrade, and a 20G would be a bit more extreme but still very good. depends on whether he wants to spool a little sooner or pull a little harder up top.
also to be considered is that 5 speed...

[Orbit]

If 06's have cats on the upippe. you will see the most gains from upipe and downpipe. the spool will be much faster.

[Mikie13]

no cats on the 06 uppipe...

[wrxbert]

i need more help! my fiance bought me an APS bov, keep it or.....i'm running cobb stage 1 and cobb catback and that's it for now and probably for a while, will this affect anything.....

[Mikie13]

i need more help! my fiance bought me an APS bov, keep it or.....i'm running cobb stage 1 and cobb catback and that's it for now and probably for a while, will this affect anything.....

You will hear the usual "BOVs are only for sound, the stock BPV hold plenty of boost, etc. etc. etc."

You will supposedly run rich during shifts (which is all of a half a second until you get back on the throttle), meaning much more fuel than air in the ratio if it is NOT a recirculating BOV. Over time, this supposedly hurts the engine. But I've never actually seen this documented anywhere through all the forums and threads I have read. Most people don't suggest an aftermarket vent-to-atmosphere BOV unless you are running more than 300hp and over 20psi of boost.

The only other mechanical issues I've ever heard of are that you might backfire on downshifts and when coming off the accelerator. So who knows the truth?

At this point, I think its a personal decision. If you like the sound, screw it, I would go for it and put it on. Personally I do love the sounds of them and I eventually will get one myself, just not a priority. If you notice any scary problems or if you see issues, then put the stock BPV back on...:thumbup:

[grimm]

the APS unit is a BPV i thought? I have one and it isn't atmospheric. But I do get afterfire when i get off the throttle.

[wrxbert]

bpv? sorry dont' know what that is!

i installed the aps bov and it never once vented to atmosphere, it's a dual vent so from what i've read the vent to atmosphere only happens when there is to much air recircu, it pushing the pin up further and then vents to atmosphere, i even turned the screw all the way out and still it wouln't vent to atmosphere....i'm really toying with the idea of a downpipe, but i'm not sure...