2.5 turbo bits

Ray

Ray

The Northernah'
Well, I've decided I'm building a 2.5 for the bugeye
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Think I've found a block....

What I'm going to need is:

  • 2.5 pistons, preferably aftermarket stronger ones
  • low mileage 2.0 heads
  • low mileage TD04


And that's it for now, I think...

 
This is a good decision! Yeah get a VF39, it'll match the motor better. But I guess if you're trying to be easy on the tranny, the TD04 will be plenty at stage 2.

 
GClark said:
2.5 and a td04? Go big or go home!
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I knew id catch flack for this...

IBratmanI said:
This is a good decision! Yeah get a VF39, it'll match the motor better. But I guess if you're trying to be easy on the tranny, the TD04 will be plenty at stage 2.
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This^^

My tranny was all rebuilt at about 120k but stage 2 TD04 will be enough for DD duty. And I dont wanna deal with bigger injectors, top/front mount, fuel pump etc......yet

 
1. Unless you are machining the 2.0 heads out to 2.5, put a 2.0 block in.

2. A td04 is fine. fudge the haters. Seriously, you're in college. When I was in college I barely had enough money for beer, race entry fees, gas, and paying back my loans ASAP. Sure we can all say YEAH BRO THROW A GT35 AT IT, but unless you got big baller money coming in, just slam in a used 2.0 block. There's enough kids crashing wrx's into guardrails that a motor shouldn't be too bad to find.

 
Yeah I plan on machining the heads, and its surprisingly hard to find a reasonably priced 2.0, and for almost the same money I could throw in a 2.5 with new forged pistons. and about the $ situation, I had started putting some aside incase this happened, plus im working 50 hours a week this summer. so Im going to build a good engine to last me a while!

 
I have my old 2.0 block that I haven't cracked open yet and I'm hoping the heads are okay. Hell, the block may even be okay. If you're planning do do some work on the block anyway, I could let them go for a good price!

Edit: Obviously I'd open it up first to find out if it would be worth it for you!

 
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Ray, you do not want to stay with the TD04 with the 2.5 block. In short, the TD04's exhaust flow capabilities literally choke out the 2.5. Pick up a VF series and you'll be much better off.

 
Does everyone forget what the 06 and 07 wrx with the 2.5L have for a turbo? Hmmmm...... TD04! It works great. I have no lag and great power in mine. Ignore the haters. It works great. That is exactly what I have in my car. Make sure you get the block first and look to see what series of A or B pistons it takes. People also sell brand new STI pistons for $100 on there all the time. You will enjoy the setup the way you are saying. You can always step up to a vf39 later if you decide to go that route.

Plus 2.0 blocks that are not needing a rebuild are hard to find and expensive. 2.5 blocks are cheap.

 
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The TD04 on the 2.5 is not very enjoyable IMO. For a little more he can pick up a VF with some STI injectors and be MUCH happier with a significant boost in power. If he's gonna spend the money on a complete rebuild he might as well.

 
Ryan said:
The TD04 on the 2.5 is not very enjoyable IMO. For a little more he can pick up a VF with some STI injectors and be MUCH happier with a significant boost in power. If he's gonna spend the money on a complete rebuild he might as well.
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But he just said he doesn't want to have to deal with injectors and all that other BS. Hes fine going with a TD04.

 
It's easy to make suggestions with other people's money. 'go big or go home,' 'for an extra 3 grand you can get what I think is perfect' 'forget what you want, even though thousands of people have done it and are happy with it, it wont work'

I miss the pure adrenaline rush of the turbo spoiling up and kicking me in the butt at 2800 like it did with my old Rex, but this setup (the same as he wants, only with larger injectors) is more fun. It is more predictable when getting after it, and doesn't have the lag. Plus, it is a good reliable setup. It works well and all of the nay sayers know it. It isn't perfect, but it is more than adequate. It still makes me grin when I get after it. Plus it is not going to turn his trans into a grenade. Remember the limited budget? I'm betting he doesn't want 350hp. With 350, the trany will eat its self and then there is more money being spent. has everyone missed that it is a bugeye? Or did they forget about the 300hp threshold that changes them from something that works into something that is soon to need attention?

 
He is going to need at least STi injectors and Walbro 255 fuel pump with the 2.5 block. He can probably get away with the stock intercooler if he does so choose to stay TD04. It is highly recommended that you install a larger radiator as well as the 2.5 radiators are bigger than the 2.0s.

It's a lot of work time and money building a hybrid block. Trust me I know. I would head over to NASIOC Built Motor discussion and read up on their hybrid builds.

 
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