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Old 09-24-2003, 03:03 AM   #1
Pochebum
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Default So my turbo fried and now I need help

My turbo's dead and instead of paying the dealership to order me a stock one for 900 i got a vf34. My car doesn't have a whole ton of mods. Only an uppipe, catback, intake, boost controller, safc. First I need to know how many of pounds i should boost max on these mods. Second I want to know what upgrades should I get to make sure my car and turbo have what they need. I'm pretty sure I need a fuel pump. I probably should get injectors but not sure if I really need them. Maybe larger intercooler hoses but I'm not really positive. Any feedback would be helpful. Thanks
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Old 09-24-2003, 03:10 AM   #2
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well a bigger fuel pump is certainly not a bad idea.

If you keep the boost levels low (13psi) you will be fine. Realize that 13psi on a VF34 will still give you as much power as the stock turbo at say, 14 or 15 psi. This is because the VF34 can push a larger amount of air without heating it up as much as the stock turbo.

If you wanted to go with higher boost levels (of say, 16 to 17) you would certainly want to add injectors and perhaps some other sort of engine management like a UTEC or an ecutek reflash.
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Old 09-24-2003, 11:51 AM   #3
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You should look into engine management because you will be pumping more fuel, injectors if you want to boost at the normal level, and def look into other less restrictive exhaust components.

D
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Old 09-24-2003, 01:12 PM   #4
Pochebum
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Well can't my S-afc manage for awhile? I just ordered a fuel pump. Which would be more important to do first. Should I save for injectors or save utec?
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Old 09-24-2003, 02:27 PM   #5
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yes your safc will be fine to a point. You'll need more than that if you want to raise the boost levels.
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Old 09-24-2003, 02:28 PM   #6
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Quote:
Originally posted by Pochebum
Well can't my S-afc manage for awhile? I just ordered a fuel pump. Which would be more important to do first. Should I save for injectors or save utec?
You can run a s-afc with stock injectors and IHI turbo, but you need to datalog and finish the basic mods (Exhaust!). I think you'll find 15psi easy to work with on 93 octane without touching fuel much. For me, 17psi required either race fuel or pulling timing. Don't forget when you lean out on the s-afc, you add timing.

In short, I'd run ~13psi until you got it tuned in.
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Old 09-24-2003, 04:34 PM   #7
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The subaru dealership said my s-afc is causing problems and that I should take it out. Wouldn't my safc be pretty much needed?
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Old 09-24-2003, 07:52 PM   #8
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Quote:
Originally posted by Pochebum
The subaru dealership said my s-afc is causing problems and that I should take it out. Wouldn't my safc be pretty much needed?
It can't cause 'problems' if it's installed and configured correctly (this isn't to say you can't lean it out and blow the motor). When you go to the new turbo, be sure to zero out the fuel settings and start over.

They always try to blame an aftermarket part. Many of us have been running the s-afc for yrs without a problem.
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Old 09-24-2003, 09:01 PM   #9
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Yea I'm deffinetly gonna zero it all out when I get it. Then I'm gonna have my uppipe drilled and put in an egt. My last question is after I have my turbo, fuel pump, and egt back in and its all tuned how much power will I be looking at for 12 or 13 pounds? After I get my injectors what power will I be looking at?
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Old 09-24-2003, 09:23 PM   #10
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Quote:
Originally posted by Pochebum
Yea I'm deffinetly gonna zero it all out when I get it. Then I'm gonna have my uppipe drilled and put in an egt. My last question is after I have my turbo, fuel pump, and egt back in and its all tuned how much power will I be looking at for 12 or 13 pounds? After I get my injectors what power will I be looking at?
The uppipe is not a good place for the EGT. The stock one is only there to monitor the pre-cat temp.
EGT should go in the manifold ~3" from the head.
Many people install them in the drivers side manifold(easy to get to), just out of #3 cyl.
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Old 09-25-2003, 02:20 AM   #11
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Well I was told my turbo overheated because i didn't have it. They said I should deffinetly put one on there. Should I put one on both or what?
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Old 09-25-2003, 09:52 PM   #12
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Quote:
Originally posted by Uncle Scotty


The uppipe is not a good place for the EGT. The stock one is only there to monitor the pre-cat temp.
EGT should go in the manifold ~3" from the head.
Many people install them in the drivers side manifold(easy to get to), just out of #3 cyl.
Fwiw, #3 isn't on the driver's side.

You are correct in that you should install it near the driver's side merge (#4) which is the most common to go.
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Old 09-25-2003, 11:44 PM   #13
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Quote:
Originally posted by TypeC


Fwiw, #3 isn't on the driver's side.

You are correct in that you should install it near the driver's side merge (#4) which is the most common to go.

OOPS....was bass akwards there....



What he said...
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Old 09-26-2003, 01:39 AM   #14
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The only reason I see for doing it on the drivers side is because it is easier. There are two schools of thought for the WRX; the right front since it gets fuel last or the right rear since it's closest to the hot turbo and uppipe.
I find it quite difficult to "burn" up a WRX turbo with no cat without either burning the motor, running really strange setup or using antilag.

Mark
www.Quantum-Racing.com
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