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Old 10-28-2005, 06:19 PM   #1
lasek87
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Subaru Stars How relieable???

I am putting a stage one turbo kit on my 99 impreza rs. My car has 80k miles on it, how relieable do you think it will be??? Thanks, casey
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Old 10-28-2005, 06:35 PM   #2
Master2192
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As long as it's tuned properly, just as reliable as a Factory Turbo'd Subaru.

I got one question though. Stage 1 can mean ANYTHING. Are you talking about the FAT Stage 1? If so, make sure you upgrade to an intercooled kit.
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Old 10-28-2005, 08:07 PM   #3
Sko
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Yes, list of parts or who/where the kit is from would be very helpful in determining reliability.
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Old 10-28-2005, 09:08 PM   #4
lasek87
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Here is a list of the parts: Turbo: TO4E Turbo
Piping: An up pipe (2 1/4 inch) and down pipe (2 1/2 inch) including a 2 1/2 inch high flow catalytic converter section which includes 2 O2 sensor ports is included.
Manifold: The pressure side manifold from the Turbo to the intake manifold and the air intake manifold to the Turbo Charger.
Oil Lines: Oil supply lines to the Turbo and the Turbo oil return line. The passenger side valve cover is included on all the second generation 2.5 L engines for easy installation.
Fuel Pump: Walbro 255
Engine Management: RRFPR, a voltage clamp (for speed density equipped cars) and a piggy back computer system to control ignition timing.
Gauges: A boost gauge, and a digital air fuel mixture gauge.
BOV & Wastegate: A High Performance Tial Sport Wastegate and a high performance sequential blow off valve.
Intake: Cold Air K&N Filter
Instructions: All of the necessary hardware and full color photo instructions to install the kit.
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Old 10-28-2005, 09:08 PM   #5
lasek87
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Yes it is a FAT kit!!
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Old 10-29-2005, 12:42 AM   #6
Sko
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Ok, yes, reliable at the recomended psi level!
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Old 10-29-2005, 04:53 AM   #7
lasek87
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Ok thanks sko!!
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Old 10-29-2005, 01:16 PM   #8
Master2192
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I would still recommend adding an intercooler. That'll pump up how reliable it will be at the recommended boost level.
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Old 10-29-2005, 02:13 PM   #9
kgb
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Stay at 5psi - that's about the max you can go with the amount of fuel from an RRFPR and stock injectors. 6psi would have been pushing it even with standalone
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Old 10-29-2005, 04:29 PM   #10
Handsdown
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okay, i'm an AFI n00b still but i'm thinking that instead of spending money on N/A, what if i build a kit...

i'm aiming for:

-4 psi with NO spikes and NO creep- all the time.
-FM intercooled and quick spool up... at 4 psi the extra tubing to the front shouldn't cause too much of a problem right? i'd get a really small intercooler, like half the size of the wrx hyperflow.

would an MBC or an EBC be better for this?
what kind of engine management should i use, it's on an 03 RS so it has to be able to override the closed loop, correct?

i'm trying to make a RELIABLE setup that i can still make decent power(210hp at the fly) with and not spend too much... like less than 2k with used parts....

Last edited by Handsdown; 10-29-2005 at 05:09 PM.
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Old 10-29-2005, 09:13 PM   #11
kgb
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Don't need a FMIC at 4psi, and really, to keep it at 4psi, I would say stay with 2.5" cat back - that will keep the internal wastegate working well enough (although not quite good enough for flow). Again, don't need any boost controller if you're keeping the boost down, and of course, depends on the turbo you're running - most likely a T3 class turbo. You need to make sure you can retard timing - at this level, you might be fine with piggybacks like eManage or PerfectPower. Closed loop isn't much of a problem, esp with piggybacks which will kick the stock ECU out of closed loop with the MAP/TPS signal. I guess trading in a WRX would cost more but you would be dead reliable and make the power you want.
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Old 10-30-2005, 12:01 PM   #12
Handsdown
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i'd want a small fmic so i wouldn't have to buy a new hood(no scoop on the 03) and a side mount would be cool but i don't think it's ever been done on an impreza and i don't feel like having to fabricate some major custom stuff... i'd want an intercooler just to make sure i wouldn't get heat soak if the wastegate decided not to open until 6 or 7 psi... i'd want to be prepared for the worst.

do many 40 trim T3 turbo's come with internal wastegates? or would i be getting an external wastegate(seems like for so little boost an internal one would be advantageous)? i'm assuming at 4 psi you could just set the wastegate pretty low and never have to worry about creep or spikage...

i guess what i'm asking here is:

would a higher flowing fuel pump, wrx injectors, and a perfect power PECM be enough to run reliable 4psi(given my 03 SOHC EJ25)?


or would i need to spend 1300+ on ecm just to get anything running reliably? also, do they even make standalone units for the SOHC ej25?
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Old 10-30-2005, 02:12 PM   #13
Sko
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Yes, there are lots of standalone EM options, no you dont NEED standalone and perfect power will work fine, but a standalone will be better, but also requires lots more programing and tuning.

What rallitek does w/ perfect power, is instead of upgrading the injectors they add a 5th injector right in front of the throttle body/intake and all the extra fuel the turbo needs will be supplied by this injector when boost kicks in, and Perfect Power can control that 5th injector.

I dont think you'll need higher flowing fuel pump and wrx injectors, but talk to rallitek in a week (they are gone for SEMA now) and they should be able to help out. The 5th injector boss and everything for that are also on their website.

Nick

*Also* instead of an intercooler you could use water injection.
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