I'm looking to safely get a little more boost and pull more power out of my 06 wrx. I've looked into the boost controller route for my stock turbo but it just sounds like a hit or miss on the stability of things. I've got the large TMIC to feed it and a hot side heat wrap as well plus the Cobb turbo back. Will I be looking at needing more engine upgrades other than maybe a walbro fuel pump and 650-750cc injectors? Just need some feed back from people who have used this application or similar.

 

You'll definitely need to upgrade your injectors and fuelpump.

Maybe some headers but not needed.

3071 isnt safely a little more boost and power thats a decent jump.

What's your goals.

 

GT30 is not a little more power...it is a lot more power. You are jumping a few turbo sizes up and power levels from stock TD04.

What Heedz, what are your goals? Unless you are seriously hitting the track or drags, GT30 will be a waste for daily driving (or auto cross)...there are more usable and safer options...unless you are compensating for something and need to brag about the size of your turbo

 

For a gt30 you'll need a lot more mods to really make this turbo shine, and you said wrx so that 5 speed will be a time bomb... Try an 18g, injectors,fuel pump,inlet,intake and custom tune...you will be a very happy camper!

 

I thought about the 18g. The 71 will spoon with less "lag" than the 76 and It will give me more options later on. It's no longer my daily driver so I'm not worried about that aspect. Installed RA close rat. Gears last week so I'm not worried about that grenading for a while... I'm looking for around 22psi and I would like to be sitting safely at around 375 whp until I come across a reasonable 3.9 final drive and diff's.

 

A 71 will be significantly more laggy than an 18G if response is what you want. Close to if not more than 1,000 RPM laggier, and certainly less responsive. A 76 will be within 200 RPM of a 71. Both of the larger turbos will pretty much require you to build a motor eventually.

STI RA gears are not an upgrade from your stock tranmsission, as previously said.

 

Coming from a person that owned and ran a GT3076r on a 2.0l

All variations of GT30r's will get you into the 400whp range with E85. I ran mine with no lag issues, but that was on an Ej207, no kittys, 38mm EWG, and of course E85.

Your Ej255 should meet up well with the GTX3071r if your looking for 400whp. (careful with your stock internals) You'll probably be hitting way more torque than WHP anyway.

Take it one power step at a time, go for 300whp. (20g turbo, 850cc injectors, ect)
400whp would be a GT30r, 340 fuel pump, 2k injectors, EWG, Catless, possible motor build, def a 6-speed trans.


PS: arnt Cobb TBE 2.5in?

 

^ his car was siiiiick!

 

Thanks for that info. Ill read up on the 20g and see if that will be worth the time and money compared to the 71. I've got plenty of time so there's no rush on making the decision. Once I push pass the power handling capabilities of my tranny (or turn it into gravel again) ill start looking into a 6 speed, most likely used.

 

Ive ran both on my built engine. 18g and now I have a atp gtx3071. Two complete different turbos. My 3071 spools at 3800-3900rpm with my large tmic. The 18g was around 3200-3300 if I remember correctly. If your ever around my area and want to see what the 3071 feels like hit me up. I ended up putting in a 6 speed and a new built engine, since my engine died on the 18g. So far so good, but i would have no faith in the 5 speed handling that big of a turbo. The 3071 hits very hard when the turbo kicks in.

 

How much power did you put down on your 3071? I'm thinking about going the gt30 route... Tia

 

415/450 at EQ on 91 oct w/meth

 

Any dyno showing considerably more tq and hp is running inflated numbers. E85 is an exception, but they should still be very close.

 

what about vishnu's dynodynamics?

 

wouldn't push the 5-speed trans further than 350whp.

Do et!! ET GT52!!! or GTX3076r!

Is this with EQ's new revised numbers?

2.5 usually run more torque than hp. I usually see 30+ more torque on the 25's