would this be the same if i wanted to mod my td04? besides the td05 of course.

 

TD-04 spools very quickly without modding, EM can work a TD04. P&P makes it spool faster. Problem is it simply does not have flow capability, increase boost 4-5psig, you start to heat soak. Your much better off increasing cfm at a lower boost level, while trying to minimize lag. The stock tranny handles stock power and stock fuel mapping quite well. Add power, onset boost earlier, everything is all out of wack. A closer gear ratio/longer low end, similar to the RA gearset goes a long way in delivering results of modification.

 

I agree on the 2.5L block. Here's a link to my tune from Ed on my fairly stock '06 wrx w/ the TD04. All I had was a catback and a hallman pro MBC, and a AP of course.

https://www.i-club.com/forums/vendor-tuning-service-parts-review-152/1-ed-%40-eqtuning-167537/

 

Honestly? Long story short, 8 motors since Dec '05. I really don't care to explain. Actually one of these days I'm going to write a book about it.
It can be done. I guess it has. From my experiences it works less often than it fails.
You are putting your neck out there. Trusting that where ever you take it, to have it done knows what they are doing. That's everyone, from the manufacturer of the piston/rings, to the material of the seals. Once that shell is cracked and reassembled, you have no idea what your gonna get. If you insist in getting a built motor. Take the plunge, call Cosworth. What was that???? COSWORTH!!! Explain what you want and buy the motor, can you say "OMG tech support from COSWORTH"? You will save money in the long run. Lastly don't blow up your daily driver. All work, no play, makes Jack a dull boy"

 

haha, well thats some good advice ipozestu, thanks. I always did admire your wagon, sorry to see it go.

 

^Me too.

 

http://www.rallysportdirect.com/shop...it-p-2585.html

This is the APS twin scroll. This setup would be too big for a 2.0 WRX, but there are other twin scroll options that don't require you to go rotated. There are IHI turbos that are used in the JDM STi that could be bolted to a WRX. The thing w/ going to twin scroll is you'll have to change your oil pan, headers, uppipe, and downpipe. The twin scroll setups I've seen have been able to hit peak boost below 3000 RPMs. Hope that helps.


I read that the 2008 WRX has a twin scroll turbo in it now and peak torque comes in around 2400 RPMs. Anyone know what turbo it is? JDM legacy turbo?

 

wait your complaining about lag on a vf34?

Have you tried port/polish on the vf34?

Those don't lag bad at all.


I'd suggest doing an sti long block and build that up. If you do not have the money for the long block don't bother. Trust me when I say you'll be sorry if you cheap out on your motor swap.

What about a mbc or one of those 3 port solenoids I keep hearing about. I'd figure mike would have some ideas for you.

 

You don't want to go away from vf and fmic, or your car will be slow.

My advice: wait a year, save up with a complete 2.5 longblock for $3000, and get that installed.

The reason why you should avoid getting the shortblock only, unless you really care that it's brand new, is because you're looking at a good 2000+ to install it if you end up resurfacing the heads, and gaskets. After that you can only sell your EJ205 block for peanuts.

On the other hand a longblock can be swapped in for around 500, although you will need to spend a bit more to plug up AVCS if you don't have an STI ecu. It will make MORE power due to the better cams, and cost about the same or less.

In ADDITION, you will avoid the headaches of installation if the shortblock was not installed correctly, which no matter what shop you're going to is a bigger probability than a longblock being installed bad. And, you can sell your entire ej205 longblock which is worth a lot more than a shortblock.

 

I also have to comment on the 2.5, it's difference is night and day - off boost 2nd gear is more grunt than 1st gear on a 2.0

The only problem is these days STIs are getting cheap enough that if you are going to do RA gears and block, you could have already bought an STI

It's such a big improvement. No matter what you do with a 2.0 it won't have grunt. Think about it, 2.5 is 25% bigger, a substantial difference. The WRX is lighter than the STI and the effect is very pronounced.

 

Dude. You have a vf-34. Lag is as minimal as you are going to get for larger turbo's. Also, why are you running an FMIC with a 34??? Get a top mount. Get tuned, port and polish, get an MBC.

 

Sounds like you want more torque....sell your car and get a 2.5L wrx and carry over your current mods. You may think it sounds expensive but in the long run it would cause less headaches and be much more reliable than a built block imo.

My intraweb knowledge tells me that HUGE wbr front mount is causing the lag, dont they recommend that one for GT35R setups? A top mount or smaller front mount would probably help with the lag......how much?...who knows.

Full boost by 4K with a giant front mount and vf34 on a 2.0L aint bad by any means.....get used to it

 

I do not see how an external waste gate will give you more power. It controls how much exhaust goes to spin the turbine and how much is dumped to the downpipe/atmosphere. If the EWG just keeps more exhaust spinning the turbine, you can accomplish the same/similar result with an MBC. At least on a small 2.0L setup.

A ball and spring MBC will help with spool by holding back how much pressure is applied to the waste gate actuator that controls the waste gate arm. This allows more exhaust to spin up the turnbine and get you moving.

As for modding a TD04, you are wasting your money. The only thing it will give you is better spool up, not more power. If you add more boost you are only running the turbo outside it's efficiency range and will damage the bearings and oil seals. I am running 18psi on my second TD04(80K miles on the stocker, over half of that at >16psi) with a hallman MBC and a protune(EQ) and the car spools fast, and pulls hard.

I have read some posts on nasioc about the ebay turbo inlet hoses improving spool up a bit. For $100 and a couple hours of work I am tempted to do it.

I would just save your money and find a 2.5L long block from an STi, 06+WRX, FXT. the torque will be night and day difference, and you can make awesome power with that VF34.

 

Save for the 2.5 block! I have a similar setup; VF34 on a 2.5 block with a JDM STi TMIC. Torquey little bastard:

 

Just out of curiosity is it possible to get the 2.0L engine to be a 2.2L? Would it be safe to do that?

...

Or how hard is it to find a EJ22 that can handle boost?