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Old 06-28-2006, 01:43 AM   #1
benibarra23
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Default Stock Boost and Boost controller question

What is the max boost a 02 WRX should build? IM currently building 15psi and im having some problems so I plan on upgrading stuff if it needs to be fixed. My buddy has a boost controller that he wants to try out on my car but since its stock is that a bad idea? What does a boost controller do exactly besides the obvious and control boost.
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Old 06-28-2006, 02:06 AM   #2
wrxdrvr
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A manual boost controler controls boost... At what ever boost level you set it at. Problem is it will always allow the boost up to that level even at part throttle and the ECU doesn't know it's 15 PSi and is expecting 8 PSi so it only puts in enough fuel for 8 PSi not 15 PSi so that's not a good thing. It also doesn't lower boost at higher RPMs so that's not too good for the engine either. But anyways you "can" get away with 16 PSi if you can control your driving style...Not many people can, so they end up with major engine failures, So beware.! Edit: Oh and stock boost is only 13.5 PSi.
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Old 06-28-2006, 10:44 AM   #3
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An EGT gauge with a warning light and audible alarm solves any partial throttle boost issues. if you get lazy and forget, the light and buzzer warn you.

Also you can run a MBC/EBC with a reflash. I have a Protune and run a MBC at the track. The OL/CL delay is less and it is moved down to like 15-20% TPS.
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Old 06-28-2006, 05:15 PM   #4
benibarra23
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Do you guys know how much PSI the stock injectors push? And what size they are?
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Old 06-28-2006, 05:57 PM   #5
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on an 02.. ol/cl delay isn't an issue

on the stock turbo, untuned, 16psi is about the max you wanna push
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Old 06-28-2006, 07:58 PM   #6
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Quote:
Originally Posted by wrxdrvr
A manual boost controler controls boost... At what ever boost level you set it at. Problem is it will always allow the boost up to that level even at part throttle and the ECU doesn't know it's 15 PSi and is expecting 8 PSi so it only puts in enough fuel for 8 PSi not 15 PSi so that's not a good thing. It also doesn't lower boost at higher RPMs so that's not too good for the engine either. But anyways you "can" get away with 16 PSi if you can control your driving style...Not many people can, so they end up with major engine failures, So beware.! Edit: Oh and stock boost is only 13.5 PSi.
Would an electronic boost controller eliminate some of these issues?
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Old 06-28-2006, 08:34 PM   #7
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Quote:
Originally Posted by benibarra23
What is the max boost a 02 WRX should build? IM currently building 15psi and im having some problems so I plan on upgrading stuff if it needs to be fixed. My buddy has a boost controller that he wants to try out on my car but since its stock is that a bad idea? What does a boost controller do exactly besides the obvious and control boost.

15#'s on a completely stock car? What are these problems you speak of? and what kind of BC? An MBC bypasses the stock BC and may not be a good idea if you don't know what you're doing
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Old 06-28-2006, 08:39 PM   #8
wrxdrvr
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Quote:
Originally Posted by BoostAWD
Would an electronic boost controller eliminate some of these issues?
I've no idea... you already have one stock. I would rather get a protune if you want to up your boost. It would be the way to go after getting some EM.
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Old 06-28-2006, 09:39 PM   #9
benibarra23
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Quote:
Originally Posted by hondaeater69
15#'s on a completely stock car? What are these problems you speak of? and what kind of BC? An MBC bypasses the stock BC and may not be a good idea if you don't know what you're doing
Problems I am having are that im peaking at 15 and then droping down imediatly to about 13 then again peaking at 15 sometimes 16 psi.
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Old 06-28-2006, 09:48 PM   #10
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Oh yeah one more question, what kind of turbo does the 02 WRX have? Someone asked me if it was the Mitsubishi Turbo or something else and I had no clue
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Old 06-28-2006, 10:53 PM   #11
wrxdrvr
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Quote:
Originally Posted by benibarra23
Problems I am having are that im peaking at 15 and then droping down imediatly to about 13 then again peaking at 15 sometimes 16 psi.
Sounds like you are over boosting and the ECU is cuting back boost but then it goes too low, So it's hunting for the proper level 13.5 PSi. When I did the 3/16 mod that is what happened to my car Something is not right with your vacume hoses, T connector , inline connector to boost control solenoid.
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Old 06-29-2006, 02:32 AM   #12
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hmmm,, i think my car only makes 10-12psi at WOT. Ive ran it all the way up to 6000rpm in 3'rd and that's about as good as she gets. Car has 88k on it so maybe it's time to start replacing components and hoses.

Shane
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Old 06-15-2010, 02:42 PM   #13
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i got crazy boost spike at low rpm. when i punch it, it goes to rev limiter. then when i switch gears theyll drop. if im at 2500 in 4th and i stomp it, itll go til rev limiter then ill shift to 5th when i hit fifth its at 3000. wtf? any ideas
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Old 06-15-2010, 06:19 PM   #14
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what is a manual boost controller actually doing? i know it limits the psi but how? and than a computer just sets a map so when your at x rpm's you have a set psi? and why should you have a lower rpm at redline?
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Old 06-15-2010, 07:46 PM   #15
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An MBC is not a "fix" for a problem and is more likely to cause other problems without a tune than anything. You need to get your car looked at by someone who knows how to diagnose properly. Then you should get the issue fixed based on the diagnosis. You won't be able to do that over the internet...

In point of fact the peak/hold boost called for in the stock ECU mapping is 13.6-13.8 psi. Keep your buddy away from your car if you want it to stay in running condition...

Also sounds like you have an IMMENSE amount of learning to do. Answers to the questions you are asking can be found in the stickies and threads of note. It is better for you to ask or take action based on the information you find there.

Unabomber is coming...


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Old 06-15-2010, 09:15 PM   #16
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Wow, this thread...so full of fail. Thank you soob.

A stock 2002 comes from the factory pushing 13.5 PSI max of boost. It uses a 2 port solenoid, not really the optimal setup. The stock WRX injectors for that year are 420-440cc IIRC. As soob said, this information is ALL in the stickies.

Oh, and it's a Mitsubishi Heavy Industries TD04H-13L.
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Old 06-15-2010, 09:26 PM   #17
soobaviator
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Quote:
Originally Posted by OrbitalEllipses View Post
Oh, and it's a Mitsubishi Heavy Industries TD04H-13L.
You mean -13T...
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Old 06-15-2010, 09:35 PM   #18
OrbitalEllipses
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Yeah that.
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Old 06-15-2010, 09:51 PM   #19
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Quote:
Originally Posted by OrbitalEllipses View Post
Wow, this thread...so full of fail.
Oh, and it's a Mitsubishi Heavy Industries TD04H-13L.
Its a TD04L-13T
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Old 06-15-2010, 09:56 PM   #20
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You're going to fault me over one letter, when there's multiple posts of ignorant information? Woohoo NASIOC.
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Old 06-15-2010, 10:04 PM   #21
soobaviator
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Quote:
Originally Posted by OrbitalEllipses View Post
You're going to fault me over one letter, when there's multiple posts of ignorant information? Woohoo NASIOC.
If we are going to go straight dork about it a TD04H is a different turbine than a TD04L or TD04HL... Ain't NASIOC cool!
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Old 06-15-2010, 10:13 PM   #22
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I'm all jumbled because of the 19T upgrade thread, I swear!!
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