EFR 7064 Twin Scroll / IWG / Pfab Top Mount / V-Mount build
 

After 3 or 4 years of tracking the car in NA form, I decided I wanted more power, especially after moving back to high altitude. A couple months ago, I started researching builds and what was available in making as much as I can a bolt-on setup for me and really didn't find anything that suited my needs. This caused me to message one of the local S2000 fabricators. After a good bit of messaging back and forth, I met up with him last month and dropped off my turbo with him to build me a custom manifold and downpipe. After a little bit of wait time due to being further down on the list of already committed projects, I started receiving pictures as the manifold progressed and fast-forward to yesterday, I went and picked i up. With my requirements of using all the built-in stuff on the EFR, as well as working with a turbo with physically large dimensions, he put in the work to figure it all out and build a beautiful piece.


That said, more on the car... It's been a typical NA track car (TTB, but probably could be TTC), but on E85 previously using STi injectors and a 155 lph pump in a surge tank (stock everything else). I already have some other needed items like an AEM EMS2, WBO2, etc. This is a winter project with no deadline since I have a lot of stuff on my plate due to recently moving and buying a house that needs things worked out (like the garage space being setup for my usage... And a heater!).
Things currently on the build list:

- EFR 7064, .92 Twin Scroll w/Turbo Smart 2-port actuator
- Twin Scroll, IWG turbo manifold + 3" downpipe
- ID1300's
- SoS Surge tank that I now need to swap a 320 lph pump into.
- Ordered and SoS V-mount
- bunch of misc shit that'll have me waiting on parts and frustrate me during the build. :)

I told my wife that this is what she got me for Christmas. :)
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As noted, I have some work to do in the new garage before I can even get started tearing the car apart.

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Being mocked up and welded.

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I also asked for the flange to have some additional bracing.

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And now I get to start playing with it all. This manifold is stout... Almost kills me to add this much weight to the car with the manifold and turbo, but should be fun!

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More parts porn...

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sexy ^.^

wow looks nice,BTW you have my favorite sti as well. The kit looks nice. have him fab you some heat shields for both manifold and turbo.
Thanks for sharing the thread with me.


And i followed your recommendation and ordered some ohlins dfv. Currently they say out of stock but i dont really care when i get them

I've been following your thread. I was considering trying to bottom mount my turbo as well, but we'll see how this does for me.

Thanks! It's my favorite generation of STi as well. :) It looks stock, but it's just as worked over as the S2000 with a built motor, EFR turbo, coilovers, etc. :)

Good to hear on the DFV's! I'm positive you'll love them. Where did you order from?

Yes i almost came close to buying that generation of wrx but passed on it for my mazdaspeed3 choosing raw power over beter driving dynamics with awd vs fwd. Back then i didnt know much about powertrains and how different they drive. I ordered them from rallysport direct for just 1840. They are out of stock but who cares. Im in no rush to get them as its still cold outside anyways. I dont see any issues with top mount. Only thing is heat is going to accumulate underneath the hood but that shouldnt hurt anything and isnt exclusive only to top mount.Has the v mount shipped out yet?

The Turbosmart one works MUCH better than the BW one, you'll like it. If it's still going to be a track car an oil cooler if it doesn't already have one would be a good idea.

Yeah, I use a 2-port on my STi with an EFR as the BW one did not do well. I had to run the vent port on the supplied EBCS to the bottom port of the IWG to get it to bring WGDC down.

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Here is a before and after on WGDC. First graph is with the second port vented, the second is with the second port going to the vented side of the EBCS. No tuning changes were done.

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It does already have an oil cooler, however, I am going to upgrade and have better placement since I'll be using a V-mount. I will likely get a Fluidyne Therm-HX cooler as I have had really good performance with them in the past.

The turbo you are using is both water and oiled cooled right?

Yes, to both turbos.

Will be interesting to see how this setup will compare with the one I have from Full Race with the same turbo. Btw your going to love the low end grunt this turbo gives you.