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Well guys I know this is going to be interesting to see the responses I'll get, but here goes nothing. In November I destroyed third gear in my STi and decided to put that car on the backburner to show the Sentra some love. As a result, I've decided to turbo my Spec V aka the daily driver. I know the general consensus on here is that eBay sucks and I accept that. I've had good luck with eBay parts in the past so I've decided to use as many eBay parts as I can. I already have the eBay exhaust and some other parts. I am also planning to reuse my eBay 3" cold air intake as a charge pipe to the throttle body (seen this done many times). I am doing this not only to turbo my own Sentra, but to also help others who may follow this path. My goal is to show that eBay parts can function as they are intended to as long as used properly and their flaws are addressed. Almost all of my research on eBay turbo parts has come from the KA24DE-T community who seem to have good luck with them AND the owners are just as cheap as we are :D. To keep with the original intent of this, I have substituted an eBay part in whenever possible. Let's get started, shall we?

Aside from the Summit Racing and Treadstone parts, everything on the parts list below has been sourced via eBay whether or not they are name brand.

Parts List as of right now:
Innovate Motorsports LC-1 Wideband with DB 52mm red digital gauge - $155.94
Emusa T3/T4 hybrid .50 trim turbo with polished compressor and .63A/R hotside - $149.99
Emusa 38mm 2-bolt flange wastegate (appears to be a Tial knockoff) - $59.58
Emusa RS BOV (obvious Greddy knockoff) - $39.99
Emusa Universal 25"x12"x3" delta fin intercooler - $69.99
eBay cast Sentra QR25DE T3 turbo manifold with 38mm wastegate flange (obvious Treadstone knockoff) - $179.99
3x eBay 2.5" to 3" silicone intercooler couplers (intercooler inlet/outlet to piping) ([email protected]$7.75) - $23.25
1x eBay 2.75" to 3" silicone intercooler coupler (intake to throttle body) - $7.99
2x eBay 3" to 3" silicone intercooler coupler (for replacing rubber couplers on eBay cold air intake) - $13.98
1x eBay 2" to 2.5" silicone intercooler coupler (compressor outlet to piping) - $8.75
eBay 2.5" universal polished aluminum intercooler piping kit w/black couplers and t-bolt clamps - $116.99
2013 Subaru STi 565cc top feed injectors with <10k miles on them - $0 donated by the good folks at Goodspeed Performance here in Scottsdale
AEM FIC-6 (bought this used) - $220
2J-Racing 5 bolt downpipe with wastegate dump tube plumbed back in - $160 via @Nismo062
Treadstone oil feed line (with fittings) - $35.28
Treadstone .065" journal bearing turbo oil restrictor (important to the life of any cheap journal bearing turbo) - $11.55
Treadstone Standard T3/T4 Oil Return Drain Flange -10AN - $15.75
Treadstone Stud Kit (no gaskets) M10 X 1.25 and M8 includes copper lock nuts and washers - $18.00
Auto Meter 1/8" NPT Female to 1/8" BSPT Male fitting (to adapt feed line t-fitting to oil pressure sensor port) (ATM-2269) - $11.97
Summit Racing straight hose end -10 AN hose to female -10 AN aluminum Black Anodized (SUM-220090B) - $8.97
Summit Racing Braided Stainless Steel hose -10 AN 3' Length (SUM-230003) - $19.97
Summit Racing 45 Degree Hose End -10 AN Hose to Female -10 AN Aluminum Black Anodized (SUM-220086B) - $15.97
Summit Racing Straight Male -10 AN to Male 3/8" NPT Aluminum Black Anodized fitting (SUM-220046B) - $5.97

Parts that I already have on the car (some are from previous owner):
eBay/OBX lightweight crank pulley (previous owner installed)
JWT BSR kit (previous owner)
eBay/OBX throttle body spacer (previous owner)
XS-Power 4-1 header & midpipe
eBay 2.5" catback
OBX 14" & 18" resonators
OBX Forza muffler
eBay 3" cold air intake (will be reused as charge pipe)
eBay aluminum radiator with dual eBay 12" electric slim fans

Now for some pictures of the parts. I will preface this by saying I am very impressed with the quality of the Emusa parts and that is why I have chosen them for all of the major parts. I seem to be finding a lot of d-series turbo Hondas, KA24DE-T 240s, V8 guys (LS1Tech), and even some Supra guys using their parts.

All of the Emusa parts came very nicely packaged in black boxes bearing their name and logo. Emusa seems to take pride in their products. This is the wastegate box



The most important part of any turbo kit, the turbo. It is an Emusa T3/T4 hybrid .50 trim with a .63A/R turbine housing. Pretty nice looking unit. Notice that material has been ground off the nuts that hold the compressor and turbine wheels on. These turbos actually come balanced. The shaft spins freely and has 0 play. Seems to be of really nice quality. Time will tell.






Emusa 38mm 2-bolt adjustable wastegate. I've read several good reviews online that these hold boost accurately without creeping etc. Came with several different springs, vacuum fittings, two weld on flanges, gaskets, and a fire ring to put in between the wastegate and flange. I am really impressed that the Emusa logo is laser engraved on the top. I disassembled the wastegate and found no metal shavings as some other reviewers had mentioned. I installed the weakest springs which I believe is supposed to be 4 psi.




Emusa RS BOV. Seems to be the pretty standard eBay Greddy knockoff. I've compared it to regular no-name eBay RS clone BOV and the Emusa seems pretty similar. The machining seems a little nicer on the Emusa unit. Emusa also has a similar mushroom shaped design diaphragm housing on this making it look like the wastegate. In the box it came with some vac line, bolts/nuts, tiny hose clamps, flange, and gasket. The Emusa logo is also laser engraved on top like the wastegate. I plan to recirculate this in the future and have a 1" recirc adapter fitting on the way. I also ordered a better BOV flange because I'm not too impressed with the cast one it came with.



Emusa 25"x12"x3" delta fin intercooler. Seems to be of good build quality. The delta fin design is also a plus. Just like the wastegate and BOV, the intercooler bears the Emusa logo as well. What I find most impressive about the intercooler is that the Emusa logo is actually stamped/embossed onto the top and bottom of the intercooler core. Once again it seems like Emusa is going to pretty great lengths to brand their parts. All in all welds seem okay, core looks nice, and the endtanks are solid enough. I am going for a stealthy look (recirculated BOV/non-dumped wastegate) so I went ahead and painted the intercooler flat black using Rustoleum flat black high temp BBQ grill spray paint. I taped off the inlet/outlet fittings and laid on light coats spraying from an angle as not to paint the inside of the fins.





eBay cast QR25DE turbo manifold. I believe this to be the same manifold that Godspeed sells on eBay, but either Godspeed does not brand their products or this is just another clone of the Treadstone manifold. Flanges seem to be machined flat, but the casting still seems very rough. You can tell only the most minimal of efforts were made to clean up the casting lines. I am going to use my die grinder along with my deburring bits to clean the manifold up on the outside and inside.





AEM FIC-6. I picked this up used via craigslist. Bought it from a mkIV Supra owner who got this in a trade from a fellow Supra owner who pulled it off of his Evo VIII. I have no idea why someone would run this on an Evo as there is a huge Tactrix cable/open source tuning community. Seems to be in great shape and the harness isn't cut to shit which is whats important lol.



That's all for now. Will continue to update this thread as I receive more parts/start installing parts. The intercooler piping kit is supposed to come in today so if it does I plan to start making the intercooler mounting brackets and start figuring out the piping situation.
 

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someone using cheap parts that is probably going to make the most of it instead of going in half cocked and blaming the parts.
 

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I have no doubt that the parts will work, but my interest is how long will it work for.
 

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hmmm....interesting. If this works im sure many other people will do this.

Seeing as he already did the research on which ebay parts are reliable.
 

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Nicely written.

I'm curious to see how the ebay stuff holds up.

This has the potential to destroy a very old, longstanding theory about ebay parts (or your motor).


Good luck man. I'll be watching out of curiosity.
 
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In the honda world, godspeed/emusa turbos are seen quite a bit. Its hit and miss, some smoke after 5k miles, some have been abused for 50k miles without failure.

Time will tell, I personally love a good budget build. Even if the turbo shits out, the rest of the kit is most likely sound...you would just need a decent turbo.
 

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I've seen a ton of guys put these ebay turbos on cheap race cars, a lot of guys swap a chevy truck motor, toss two of these on it and go kick ass. I dunno about trusting it on a daily, but hopefully you'll have some good luck. Cheap to replace anyways.
 

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In the honda world, godspeed/emusa turbos are seen quite a bit. Its hit and miss, some smoke after 5k miles, some have been abused for 50k miles without failure.

Time will tell, I personally love a good budget build. Even if the turbo shits out, the rest of the kit is most likely sound...you would just need a decent turbo.
Thats what i was thinking....if you want to upgrade you can do so in stages.

New better turbo, WG, BOV....whatever. The hard parts should be fine
 
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Very interesting. I really want too see this works out with someone who did his research and knows lots about turboing a car.
 

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Discussion Starter #13
I'm interested in seeing how this turns out. Very detailed parts list! Subscribed.
I'm a pretty thorough person so I wanted the parts list to be thorough as well. Thanks.

someone using cheap parts that is probably going to make the most of it instead of going in half cocked and blaming the parts.
This ^^ I've found a lot of the people that have issues with eBay parts are the people that go into it expecting a $60 wastegate to work as well as a $250 Tial. As long as you have the right expectations going in, you can make the most out of the parts you have.

I have no doubt that the parts will work, but my interest is how long will it work for.
Well that's what we intend to find out, right? :D

hmmm....interesting. If this works im sure many other people will do this.

Seeing as he already did the research on which ebay parts are reliable.
I like the b15u community so this is my opportunity to give back. I figure if it is a success others can use my build path to turbo their own cars............ or if it is a failure we can at least conclude that eBay parts don't work even when given every opportunity to do so. I intend to do this properly.

I have an jnnovate just lying around I would sold you for like 80 bucks...
Tony. Once again, I hate you lol. If you didn't strike me down over the oil feed line, I would have hit you up to see if you had anything on my parts list. Oh well it was only $155.

Nicely written.

I'm curious to see how the ebay stuff holds up.

This has the potential to destroy a very old, longstanding theory about ebay parts (or your motor).


Good luck man. I'll be watching out of curiosity.
My goal is exactly what you stated; to destroy the "all eBay parts are crap" mentality. I'm sure it won't perform as well as a top dollar turbo (like the Precision PTE6466 on my STi) but I am fairly confident it will at least last a few thousand miles on low boost. I only plan to run maybe 8 psi. Thanks.

In the honda world, godspeed/emusa turbos are seen quite a bit. Its hit and miss, some smoke after 5k miles, some have been abused for 50k miles without failure.

Time will tell, I personally love a good budget build. Even if the turbo shits out, the rest of the kit is most likely sound...you would just need a decent turbo.
This is a valid point as well. Even if the turbo were to take a crap, which I highly doubt, I can still just buy a cheap Precision and be done with it. Through my research in the Honda and 240SX communities, I've come to the conclusion that Emusa turbos are more or less an eBay/Godspeed turbo that has been machined more precisely and has also been balanced. A lot of the guys in the Honda community claim that an eBay/Godspeed turbo will hold up to 20+ psi of boost for thousands of miles as long as a .065" oil restrictor is used (to protect the seals from high oil pressure) and as long as the turbo is disassembled and balanced. Emusa clearly already balanced my turbo so I'll just try their balancing.

I've seen a ton of guys put these ebay turbos on cheap race cars, a lot of guys swap a chevy truck motor, toss two of these on it and go kick ass. I dunno about trusting it on a daily, but hopefully you'll have some good luck. Cheap to replace anyways.
I've never been a huge import guy so most of my friends are V8 guys. I am myself a V8 guy really. Hot Rod magazine made the eBay turbo craze on LS1Tech. Once they discovered you could take a junkyard 4.8 and slap an eBay 78mm turbo on it and make crazy power, everyone listened. A lot of the cheap turbo drag car builds use Godspeed or Emusa wastegates even if they use a nice Precision, Turbonetics, etc turbo.

Thats what i was thinking....if you want to upgrade you can do so in stages.

New better turbo, WG, BOV....whatever. The hard parts should be fine
Yep. The only thing I can really foresee as possibly needing to be replaced is the turbo, but I doubt I will have to. Everything seems really nice and solidly built including the turbo. With that being said, I highly doubt the wastegate or BOV will present issues.

Subscribed.
Thanks

Very interesting. I really want too see this works out with someone who did his research and knows lots about turboing a car.
That's my goal. I want to help the community by actually trying the eBay parts and using them PROPERLY. I am not going to hack this together. I do things the right way. One look at the engine bay of my STi will show that.

Don't let the decal fool you the engine bay is all me. They just built the motor :)
 

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Discussion Starter #14
Just a little update for today. The universal 2.5" intercooler piping kit came in. I am really impressed on the quality of this. The piping is thick and is most definitely solid. The couplers are actually 4-ply which are nicer than the various 3-ply reducer couplers I ordered. Going to hopefully start making the intercooler mount brackets tonight and start running some piping. The snow storms in the midwest/east coast are slowing down all of my shipments so I don't have some of the reducer couplers I need.


 

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I think that the main concerns with boosting your car is the wastegate. If that thing goes bad unexpectedly, instead of running 6-8 psi, you could spike to 20 which would then damage/kill your engine.

If your turbo goes, then you get a new one. If your wastegate goes, it could take your engine with it.

The main reason we tell people not to cheap out on certain parts is not due to ' if ' it will work, but more for ' how long will it be reliable '.
We know when to change our fluids and other parts, but no one has any recommendations on when to change your wastegate because it could be warn out.

I am in no way knocking your idea, but I am saying be careful. They are cheap for a reason.
Also, as said earlier, we could buy the same parts and yours could last for 50K miles and mine could die after 2K....:(
 

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Discussion Starter #16
I think that the main concerns with boosting your car is the wastegate. If that thing goes bad unexpectedly, instead of running 6-8 psi, you could spike to 20 which would then damage/kill your engine.

If your turbo goes, then you get a new one. If your wastegate goes, it could take your engine with it.

The main reason we tell people not to cheap out on certain parts is not due to ' if ' it will work, but more for ' how long will it be reliable '.
We know when to change our fluids and other parts, but no one has any recommendations on when to change your wastegate because it could be warn out.

I am in no way knocking your idea, but I am saying be careful. They are cheap for a reason.
Also, as said earlier, we could buy the same parts and yours could last for 50K miles and mine could die after 2K....:(
That's why I have been disassembling the parts to inspect them for any potential failures down the road. I am doing my best to address the weaknesses of parts like this.

On a side note. In all my years around turbocharged cars, I have yet to ever find a wastegate that fails closed. If the diaphragm is damaged/torn, the wastegate will fail open meaning it will at best hit spring pressure boost. Almost every failure on a wastegate will cause it to open prematurely rather than stay closed. The only way I can see this happening is if for some reason the valve itself becomes seized in the guide which I have no idea how that could happen.

Also some more parts came in today. I was pleasantly surprised when I saw my wideband is the new Innovate LC-2 wideband rather than the old LC-1. Also some 3" t-bolt clamps for the cold air intake/charge pipe conversion came in.


 

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Glad that someone is trying this out. I've learned from past experience in firearms accessories that cheaper isn't always worse. And although a product may be lower quality than something 3x its price, there is a "good enough" threshold that one needs to consider if what they are using fulfills the needs of the project at hand. Subscribed!
 

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I think that the main concerns with boosting your car is the wastegate. If that thing goes bad unexpectedly, instead of running 6-8 psi, you could spike to 20 which would then damage/kill your engine.

If your turbo goes, then you get a new one. If your wastegate goes, it could take your engine with it.
(
A guardian angel will fix this potential problem. Stratified Guardian Angel if you're inclined to search and see what it is.
 

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That's why I have been disassembling the parts to inspect them for any potential failures down the road. I am doing my best to address the weaknesses of parts like this.

On a side note. In all my years around turbocharged cars, I have yet to ever find a wastegate that fails closed. If the diaphragm is damaged/torn, the wastegate will fail open meaning it will at best hit spring pressure boost. Almost every failure on a wastegate will cause it to open prematurely rather than stay closed. The only way I can see this happening is if for some reason the valve itself becomes seized in the guide which I have no idea how that could happen.
Most wastegates are normally closed gates. The spring prevents the gate to be opened until pressure below the diaphragm is past the spring pressure rating. The positive pressure from the turbo will push the diaphragm up against the spring till it opens (thus the spring sits on it and against the top cover). So if a diaphragm gets ripped the spring will keep the gates closed permanently and will cause a boost spike.




However there are some truth to what you are saying about wg failing in the open position. If by somehow the valve stem manages to miss the spring and goes in between and that the wg is mounted upside down and that the exhaust pressure out the manifold pushes it open then you can say it failed and opened itself.
 
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