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Old 06-16-2002, 05:13 PM   #1
STiTuner
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09 135i
Jet Black

Default Can't make up my mind... HELP ME

ok so here is the deal... over the year I've been part of a couple purschases that didn't work out in attempts to turbo charge my car, and now because of that I have a crap load of parts that don't match up and now that I'm finally starting to get things together I need some help deciding on which route to finnish up on.

I have stock wrx turbo turbo right now and am ordering a JDM turbo manifold and up-pipe, the down pipe won't be hard to get a hold of but what is stumping me right now is the WRX turbo bleeds boost at 8 psi but I have a tial wastegate from another setup I bought a while ago that is set at about .5 bar, I could easily find a softer spring for that wastegate but then i don't really want to tap my JDM up-pipe to put it in.

anyway should I buy another up-pipe and tap it for the wastegate or should I sell the wastegate and use the money for better injectors and so forth? OR should i just sell everything and start from scratch? either way I've WASTED a lot of money on this and most of it is sunk expenses.

here is a list of the other things I have
Vortech Sfmu
Walbro 255 fuel pump
Tial wastegate
Greddy Type S BOV
Spearco TMIC side feed
Apex'i ITC
WRX turbo
Apex'i AVC-R

of course I have all of the small pieces aswell ie waterpumps, hoses connectors, gauges, so forth. Maybe if I sold the AVC-R and the wastegate I could get enough for injectors, and a littel to cover an S-AFC?

anyone with ideas please feel free to share. Oh yeah I do plan on changing my compression ratio later probably mid next year...

brad
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Old 06-16-2002, 05:37 PM   #2
8Complex

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Anything that bolts in place of a stock WRX turbo will most likely have an internal wastegate. I would say sell the Tial, even though it's supposed to be very nice, and get a different spring for the stock WRX wastegate, or new wastegate (not sure about if those internals can be swapped or not).

Out of curiousity, is that a 35mm Tial? If you do go the route of selling it, let me know, I just may be interested in picking it up from you to replace my Deltagate.
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Old 06-16-2002, 05:45 PM   #3
STiTuner
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8: yes its a 35mm wastegate, I'll give you dibs when I'm ready to sell it.

anyone wouldn't happen to know if the spring from the Legacy turbo would fit on the wrx turbo? if I recall that one had a 5 psi spring? or if there was a place that could swap them.. I've been trying to get in touch with turbonetics a few times but have been having bad luck with that. Maybe if I sent my turbo off to FP they could do it when the port/clip it.

Brad
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Old 06-16-2002, 06:24 PM   #4
8Complex

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IIRC, the Legacy turbo had a 6psi spring in it.

From what I understand, you can get replacement wastegates that'll work with that turbo pretty much at any turbo shop, so don't limit yourself to Turbonetics.
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Old 06-16-2002, 09:22 PM   #5
kaos200
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my opinion: have a shop locate the external wastegate for your setup. and cap off the internal gate. .5 bar is 7.35psi, so you can either get a smaller spring, or run that if you have some management.
This may cost a little more, but it will be more reliable in terms of not spiking, bleeding etc... Also if you ever want more power, you will end up doing this anyways.

Last edited by kaos200; 06-16-2002 at 09:29 PM.
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Old 06-18-2002, 12:04 AM   #6
STiTuner
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would i be completly insane to try and push the pressure of the WRX spring? I know thats big bucks.. well kinda.

with like 550 injectors and rrfpr and an S-AFC I should be able to keep it just right... in terms of fueling.. maybe if I but some big arse headgaskets on there to lower the compression a lttle that might work?

Brad
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Old 06-18-2002, 01:08 AM   #7
8Complex

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Fueling is the easy part to gain a solution for... the hard part is the timing management. Reason most people blow up isn't that it's not enough fuel, it's that it's too much timing causing detonation. There are a few units that you can look into for this, depending on how much you want to spend and how involved you want the tuning to be.
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Old 06-18-2002, 02:31 AM   #8
STiTuner
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well MY ITC should help a bit.. retard 15 degrees I know it advances my timing pretty well but have not tried to retard it yet.

Brad
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