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10-10-2012, 01:00 PM | #1 |
Scooby Specialist
Member#: 253560
Join Date: Jul 2010
Chapter/Region:
South East
Location: Redneck Riviera, SC
Vehicle:'83 Subaru GL Wagon |
I know its a bad idea
Now I know this is a bad idea, and I know why I just need to hear it from someone else. I have a VF40 sitting in my driveway in need of a rebuild. I need someone to talk me out of putting it on my car.
Now I know the N/A motors are only good for ~3 LBS of boost which is fine I just think it would be more fun to drive. Since I've already 'confused' my car so much (4/2 Pots, Slotted rotors, COBB AP, etc.) It's far from an ordinary Impreza since I was going for the unique approach. Good or Bad idea to put it on the car for a light turbo build. It would be rather unique but what could go wrong... |
10-10-2012, 01:09 PM | #2 |
Scooby Newbie
Member#: 213303
Join Date: Jun 2009
Chapter/Region:
NWIC
Location: Portland, OR
Vehicle:2009 Impreza 2.5i Blue |
I believe that there are quite a few out there running 6psi without issues. The Raptor Supercharger does 6psi and offers a 9psi pulley (suggests to have some work done on internals). The biggest part would be getting all of the additional components to run and manage the turbo...
Oh, and a tune... |
10-10-2012, 01:25 PM | #3 |
Scooby Specialist
Member#: 179023
Join Date: May 2008
Chapter/Region:
MAIC
Location: Virginia
Vehicle:07 CGM WRX TR Dom 1.5xtr + PPG's |
im pretty sure vf turbos can not be rebuilt.
converting your NA suby to a forced induction suby is a terrible idea. it is a **** ton of work, and a **** ton of money. you are 1000x better off just selling it and buying a wrx or sti and building from that platform. putting that turbo on your na suby is only 1 out of like 100 parts your going to need unless you know exactly what neeeds to be done to turn your impreza into a turbo impreza, and by exactly i mean every part, the work it entails, and where you will source all these parts, and a ballpark # of $ of what your doing, then no. this is possibly the worst thing you could do to your car. If you knew what was involve, and had the tools and experience to do it, then you wouldnt have to ask. Just having you have to ask, makes me think you are so far in over your head all i can do is laugh heres a rough list of parts that come to mind (be warned, there are a LOT, i am misssing) new exhaust manifold new up pipe new downpipe turbo intercooler all silicone couplers and t clamps possible new intake manifold, depening if its shaped the same as the turbo correct ECU an associated wiring some sort of boost control DBW or DBcable makes another huge hurdle jump over new tune this is a very short list, and i am sure there is a lot i am missing, not to mention the labor involved. you cant just "throw a turbo on" and have it work.... theres a LOT more to it than that Last edited by 07VTRex; 10-10-2012 at 01:30 PM. |
10-10-2012, 03:20 PM | #4 |
Scooby Specialist
Member#: 151079
Join Date: Jun 2007
Chapter/Region:
MAIC
Location: College Park, MD
Vehicle:2005 2.5RS RBP too many friction losses |
^ Nailed it.
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10-11-2012, 12:04 AM | #5 |
Scooby Specialist
Member#: 300551
Join Date: Nov 2011
Chapter/Region:
SCIC
Location: mariposa ca.
Vehicle:2002 FOZ STI 2.34 Fullers Garage |
I would do it and run it on wastegate pressure, 6-7 psi and there are ways to rebuild vf turbo's.
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10-11-2012, 04:58 PM | #6 |
Scooby Newbie
Member#: 222703
Join Date: Sep 2009
Chapter/Region:
E. Canada
Location: Ottawa, Canada
Vehicle:2006 Impreza 2.5i Crystal Grey |
You'd also have to swap your n/a x-member to a turbo x-member (it has the U shape for the up-pipe).
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10-11-2012, 05:07 PM | #7 |
Scooby Specialist
Member#: 294461
Join Date: Sep 2011
Chapter/Region:
NWIC
Location: Grass Pants, OR
Vehicle:2006 San Remo Wagon Under construction |
Alex, I'll take "Huge waste of money and resources" for $1000
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10-11-2012, 10:38 PM | #8 |
Scooby Newbie
Member#: 334848
Join Date: Oct 2012
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turbo- free
headers/uppipe/downpipe- 200 double port heads (2 one each one)- 100 a timing belt kit- 250 : ( oil pump- 100-150 tune(honestly i dont know, ) not including custom map and ecu- 0-500 find out how to lubricate turbo- gerr factor headgaskets- 150? breaking triple digits in wheel horse power- priceless |
10-11-2012, 10:44 PM | #9 | |
Scooby Specialist
Member#: 294461
Join Date: Sep 2011
Chapter/Region:
NWIC
Location: Grass Pants, OR
Vehicle:2006 San Remo Wagon Under construction |
Quote:
Orrrrr, he could swap a WRX engine in for $1200 or so if he finds a good deal, and not hassle with an open deck platform that will top out below my NA engine, unless he wants to risk kaboom kaboom. |
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10-11-2012, 11:31 PM | #10 |
Scooby Specialist
Member#: 123362
Join Date: Aug 2006
Chapter/Region:
MWSOC
Location: Dorothy's House
Vehicle:'97 E36 M3 351W FTW |
I considered this several years ago but by the time I did the math, assuming similar mechanical effort needed to to a turbo engine swap, I went with the swap.
When I looked at the effort required and the fact I could easily double the boost with a full swap it was a no brainer. |
10-12-2012, 12:15 PM | #11 | |
Scooby Guru
Member#: 120
Join Date: Jul 1999
Chapter/Region:
AKIC
Location: Where the Navy sends me...
Vehicle:1997 Legacy 2.5GT 1996 Impreza coupe |
I'm not advising HoboBob to undertake this endeavor, but there's an awful lot of inaccurate information being thrown out here. Before there were WRXs aplenty, guys used to turbo 2.5RSs using bits and pieces from the old turbo Legacys, or imported WRX bits. It can and has been done. Is it economical nowadays, with the much greater availability of used WRX drivetrains? That I can't answer.
Quote:
You do realize the EJ205 and EJ257 are open deck, right? Last edited by Patrick Olsen; 10-12-2012 at 12:46 PM. |
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10-12-2012, 12:34 PM | #12 |
Scooby Specialist
Member#: 179023
Join Date: May 2008
Chapter/Region:
MAIC
Location: Virginia
Vehicle:07 CGM WRX TR Dom 1.5xtr + PPG's |
thanks for clearing up my sloppy explanation. i was in a rush and i knew my post was full of holes. When you disect it like that it does look rather ignorant, but i was just trying to shed light on how bad an idea it was.
My main point is that it is A LOT of work, and unless you are really experienced at building cars and doing this type of thing i wouldnt even consider it. Its more work than the avg person would think, more parts than you think you would need, and lots of little stuff that adds up. Then you have the whole reliability issue of a frankenstein build vs. just swapping an oem turbo block. Serious question though: can the ecu even handle the turbo? or do you need a factory turbo ecu? that alone, combined with all the wiring would make me say hell no. IF you can find used parts at a good price AND IF you know exactly all the parts you need AND IF you can do ALL the labor yourself AND IF you are ready and able to fix anything and everything that may break along your build and IF you are fully aware that this is going to be a lot of work and headache, THEN it CAN be done. But it wont be cheap, easy, or economically feasible compared to other options like a swap. i apologize for my misinformation. I was just trying to tell OP that it was a BAD idea. I will try to give a more thoughtful and accurate answer next time. A LOT!!! Last edited by 07VTRex; 10-12-2012 at 12:39 PM. |
10-12-2012, 02:20 PM | #13 |
Scooby Newbie
Member#: 222703
Join Date: Sep 2009
Chapter/Region:
E. Canada
Location: Ottawa, Canada
Vehicle:2006 Impreza 2.5i Crystal Grey |
I think 07VTRex is right... its not a matter of IF it can be done or if it's plausible. Everything is possible and has been done. However, it's just not financially worth it at all. I know someone locally who is going through this process right now, and has spent well over $7k and isn't even close to being done yet. Mind you, he pulled his v9 2.5i engine/transm. and put a v7 STI full block and 6spd STi transmission as well. I think by the time he's done, it will have cost him almost 8-9k worth (I'm not sure of the exact amount of cash though, mind you).
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