whats the highest boost u can run on a wrx 2.0 with out killin it?? - Subaru WRX Forum
 
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post #1 of 14 Old 07-19-2006, 04:15 PM Thread Starter
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whats the highest boost u can run on a wrx 2.0 with out killin it??

whats the highest boost u can run on a wrx 2.0 with out killin it?? I have a factory turbo and intercooler.. 3 in turbo back exhaust (no cats), catless up pipe, and headers... and other stuff...
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post #2 of 14 Old 07-19-2006, 04:43 PM
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16 pounds on the stock turbo is the most effective amount you can run, that's TUNED of course. Turning the boost up to that point with a MBC and no EM will blow things up.

-Brad
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post #3 of 14 Old 07-19-2006, 08:14 PM
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Quote:
Originally Posted by bradley03
16 pounds on the stock turbo is the most effective amount you can run, that's TUNED of course. Turning the boost up to that point with a MBC and no EM will blow things up.
Absolutely correct. With all the proper upgrades I ran 21psi pump gas and 25psi on 105 race gas in my old '03. That's with STi pink injectors. Probably could have run the 25psi on pump with bigger injectors.

Note: all upgrades were bolt-ons. No engine work, water injection or anything like that.

'06 WRX STi
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post #4 of 14 Old 07-19-2006, 09:24 PM
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Quote:
Originally Posted by rex-ya
Absolutely correct. With all the proper upgrades I ran 21psi pump gas and 25psi on 105 race gas in my old '03. That's with STi pink injectors. Probably could have run the 25psi on pump with bigger injectors.

Note: all upgrades were bolt-ons. No engine work, water injection or anything like that.
Did you have a trubo upgrade, injectors and fuel pump or just injectors?

My turbo's fixed and a lot better =)
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post #5 of 14 Old 07-19-2006, 09:32 PM
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STi injectors, walbro pump, and VF22 turbo.

'06 WRX STi
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post #6 of 14 Old 07-20-2006, 01:03 AM
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I ran 19psi at the track on stock turbo, with UTEC of course.
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post #7 of 14 Old 07-20-2006, 07:12 AM
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Well, if you are only talking about the stock turbo then you have your answer, but if you are talking about an upgraded turbo things change.. It's not the "Boost" or "PSI" level that you are running that "Kills" your stock motor, its the flow that the turbo produces.. If you have a 56lb turbine wheel it will push less air then a 65lb turbine wheel at the same PSI level. PSI DOES NOT produce HP, FLOW DOES.. I would rather run a higher flow rated turbo (higher LB turbine) then high boost.. That way, when you upgrade your internals you can up the boost of the existing turbo and gain even more flow...

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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post #8 of 14 Old 07-20-2006, 08:38 PM
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my cousin ran 25 psi on his 02 when he first got it, ended up blowing the intercooler. Such an idiot, turned the boost up with a manual boost controller.
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post #9 of 14 Old 07-21-2006, 08:47 AM
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Flow rate gets you the power, but PSI should be the one that does the damage. A high flow rate has no force to it unless its at higher PSI.

Jacob
Almost clean wrx...
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post #10 of 14 Old 07-21-2006, 10:52 AM
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If your talking engine damage the Flow is the issue as if you don't have the fuel then you lean out and heat up, you also get knock which is the fastest way to destroy the engine.. But as we all know, they are both kinda hand in hand..

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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post #11 of 14 Old 07-21-2006, 11:28 AM
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Ya i was assuming the flow increase with the PSI. Im just saying at some point the pressure will be too much for your engine to hold. As long as you tune your fuel to the flow you should probably be ok for more flow.

Jacob
Almost clean wrx...
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post #12 of 14 Old 07-21-2006, 01:07 PM
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Your correct, you can Clearly over pressurize your engine and that is bad.. Also with tuning your correct you will cut the heat from detonation and lean burn situations but you will also be creating gobbs of power thus placing more strain on your internals. With more PSI (boost) or Flow you can devastate stock or even forged internals if gone overboard.. I am simply saying you are right and I am right.. (I though I was wrong once but I was mistaken ).. But seriously both Boost and Flow will destroy an engine, Boost creates flow and flow also creates pressure, i.e. boost.. Either way, too much of either is BAD...

Agreed??

02 WRX.. "It's fun when it runs.. Problem is that it hardly ever does..."
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post #13 of 14 Old 07-21-2006, 01:21 PM
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The simple answer to your question is... it depends on the turbo you are using. If you have to ask a question like this then you probably don't want to upgrade your turbo any time soon in which case 16psi is the most you should run. It should be done using some form of engine management and NOT... let me stress... NOT with a manual or electronic boost controller of any kind.

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post #14 of 14 Old 07-21-2006, 02:53 PM
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Agreed for sure.
+1 not with a boost controller.

Jacob
Almost clean wrx...
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