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This is a discussion on boost within the Engine Performance forums, part of the Tutorials & DIY category; my set up. perrin uppipe, invidia dp catless, spt catback. how much boost can i hold w/o any damage?...

  1. #1
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    boost

    my set up. perrin uppipe, invidia dp catless, spt catback. how much boost can i hold w/o any damage?

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  3. #2
    Registered User bcyb1029's Avatar
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    How do you intend on getting more boost?
    Tuned by Jorge at P&L, 240.83whp 239.60wtq at 14.8psi on 2.0L with stock td04 (But doesn't run)

  4. #3
    Registered User Thug Nasty's Avatar
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    Probably like 40-45 psi.
    -John
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  5. #4
    Moderator YBNormal07's Avatar
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    To be blunt...nothing higher than stock without EMS.

    Need more info as the second poster was implying..how do you intend on upping the boost.
    tEh PriUs=teH faSTah!@@!
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  6. #5
    Registered User rr1911's Avatar
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    Quote Originally Posted by Thug Nasty View Post
    Probably like 40-45 psi.
    nah more like 90- 100 psi yo
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  7. #6
    Registered User tayhadar1's Avatar
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    There has been a lot of these threads lately....

    To put it nicely please control your boost with engine management. Your engine will be happier, more efficient, more reliable and just all around better. We are very fortunate as wrx owners with the amount em solutions that are out there
    2004 WRX Sti Cobb Stage 2
    GO COUGS!!!

  8. #7
    Registered User PJO42387's Avatar
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    Quote Originally Posted by rr1911 View Post
    nah more like 90- 100 psi yo
    dude, im running 225 in third gear
    CGM

  9. #8
    Registered User rr1911's Avatar
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    Quote Originally Posted by PJO42387 View Post
    dude, im running 225 in third gear
    thats it ? it should be like 335 yo
    Army Ranger For Life ! Thin Blue Line
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    All We'll Drive
    DIFFERENT STROKES
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    POST WH0RE KING

  10. #9
    Registered User PJO42387's Avatar
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    Quote Originally Posted by rr1911 View Post
    thats it ? it should be like 335 yo
    na i did a vtec swap, it cant handle that much boost.
    CGM

  11. #10
    Moderator YBNormal07's Avatar
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    Ok guys...this is the tutorial section. If you want to play like larry, curly and mo....take it to the OT. Thx
    tEh PriUs=teH faSTah!@@!
    08 Audi S5 Black Diamond edition
    SOLD: 05 SWP Legacy GT Limited 5MT, 13.3ish@105 (stage 2) crappy stock clutch
    SOLD: 04 MPS/SW WRX Sti. 12.971 @ 103.97 (stock)
    278 AWHP/283 AWT, Catback exhaust
    306 AWHP/341 AWT, Stage 2
    (Scott) Moderator-STi, Drag Racing, Car Purchasing, and Tutorial Forums

  12. #11
    Registered User rr1911's Avatar
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    Quote Originally Posted by YBNormal07 View Post
    Ok guys...this is the tutorial section. If you want to play like larry, curly and mo....take it to the OT. Thx
    sorry
    Army Ranger For Life ! Thin Blue Line
    Military Militia # 1911/ Blobeye Syndicate # 1911/ Modifier's Anonymous # 1911/ Hawk-Eye Alliance # 1911
    All We'll Drive
    DIFFERENT STROKES
    EVEN MY DENTIST TOLD ME FLOSS 7 DAYS A WEEK
    POST WH0RE KING

  13. #12
    Moderator YBNormal07's Avatar
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    Quote Originally Posted by rr1911 View Post
    sorry
    tEh PriUs=teH faSTah!@@!
    08 Audi S5 Black Diamond edition
    SOLD: 05 SWP Legacy GT Limited 5MT, 13.3ish@105 (stage 2) crappy stock clutch
    SOLD: 04 MPS/SW WRX Sti. 12.971 @ 103.97 (stock)
    278 AWHP/283 AWT, Catback exhaust
    306 AWHP/341 AWT, Stage 2
    (Scott) Moderator-STi, Drag Racing, Car Purchasing, and Tutorial Forums

  14. #13
    Registered User project_skyline's Avatar
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    Exhaust components have nothing to do how much boost you can run.

    Engine internals, turbo, engine management, fuel system all determine what kinda boost you can run.

  15. #14
    Moderator YBNormal07's Avatar
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    Quote Originally Posted by project_skyline View Post
    Exhaust components have nothing to do how much boost you can run.

    Engine internals, turbo, engine management, fuel system all determine what kinda boost you can run.
    This may be true if say, you run no exhaust at all and go straight to a dump tube. But lets say you try to run a GT30 or 35 setup through a 1" diameter exhaust system. Betcha won't be able to achieve max boost. Or should I say maximum performance. You probably could get max boost, but it won't do you any good, so perhaps you are correct. Then again "how much you can run"....I'd say your exhaust size does figure into how much you can run. It it can't exit, all the boost in the world won't do any good.
    Last edited by YBNormal07; 03-11-2007 at 05:13 PM.
    tEh PriUs=teH faSTah!@@!
    08 Audi S5 Black Diamond edition
    SOLD: 05 SWP Legacy GT Limited 5MT, 13.3ish@105 (stage 2) crappy stock clutch
    SOLD: 04 MPS/SW WRX Sti. 12.971 @ 103.97 (stock)
    278 AWHP/283 AWT, Catback exhaust
    306 AWHP/341 AWT, Stage 2
    (Scott) Moderator-STi, Drag Racing, Car Purchasing, and Tutorial Forums

  16. #15
    Registered User mike3026's Avatar
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    Quote Originally Posted by project_skyline View Post
    Exhaust components have nothing to do how much boost you can run.

    Engine internals, turbo, engine management, fuel system all determine what kinda boost you can run.
    ??? Are you serious? You need good exhaust flow through the turbo to get best performance out of the turbo. So if you have 2 inch piping, there is a lot of constriction. Especially with any other hindrances such as cats, resonators, or mufflers. So small diameter exhaust tubing does affect how much throughput your turbo puts out. That is why people like large diameter, straight back, catless piping. It is like comparing exhaling breath through a straw and an empty paper towel roll.

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