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Installing turbo this week,Exhaust Questions.

Discussion in 'Forced Induction' started by CRXSI91, Jul 14, 2005.

  1. CRXSI91

    CRXSI91 Senior Member

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    ok...ive finally gathered all the parts i need to turbo :

    (Setup : 1994 Integra RS...b18b)


    Garrett T3/T4 50 trim
    Drag Manifold
    TiaL 38mm wastegate
    STR fuel rail
    Eclipse 450cc injectors
    Oil feed/return line
    Oil fittings
    Uberdata 7psi Chipped ECU (PR4)
    2.5'' Downpipe
    blow off valve


    The only things im missing is intercooler piping,and my exhaust...which im taking care of the Intercooler piping next week...but i have a question about my exhaust....now a little while ago Pissedoffsol told me that running my turbo setup on a stock exhaust system would not hurt the turbo/engine...but i wouldnt make power for shit....now i talked to someone else..and they said my stock exhaust system would put too much backpressure on the turbo/engine..and would be dangerous...now i plan on upgrading..but im trying to put it on now,and go back and change out everything,that way i know what i have to fix,and correct....does anyone know exactly what would happen (besides not making power for shit) if i boosted on stock exhaust?
     
  2. PhyRe

    PhyRe Senior Member

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    if your going to redo it the right way later y not just run open downpipe and just leave the stock exhaust hanging or rip it out. thats what i would do if i had a doubt.
     
  3. jimboburgess

    jimboburgess Go fast, Go Cheap

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    I would think that the more free flowing the exhaust the better. Start with a test pipe, and add more restriction til you get the volume you want. A turbo is a big freaking blockage in the exhaust so no need to concern yourself with needing sufficient back pressure. leaving everything stock will at the very worst, heat up red hot and burns something bad(fuel lines), I don't think you shuold have too much of a problem integras have a well thought out exhaust in the first place
     
  4. CRXSI91

    CRXSI91 Senior Member

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    i thought about doing that for ONE split second..then i thought about virginia beach police..and how loud it would be..and didnt want to do it...i mean that would work for the time being...but i probably wouldnt be able to drive it too many places...but i heard open downpipe on turbo cars is quieter than N/A
     
  5. CRXSI91

    CRXSI91 Senior Member

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    yea i know...i was gonna run 2.5'' downpipe to a 3'' exhaust..but right now...its more like a test and tune type of deal..where i tune the car to run reliable..then when it is running reliable..instead of trying to haul ass and punch it all the time..go back and upgrade....like : better intake manifold,bigger exhaust,Exhaust wrap,clutch,flywheel,Tires,LSD...etc.


    cus theres no way..ima let my setup sit in my room, for a year..buy all the shit first..and then throw it all on at the same time...
     
  6. CRXSI91

    CRXSI91 Senior Member

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    see..i just checked out evans-tuning.com..and they said the same thing Pissedoffsol said :

    LINK



    that 3" exhaust is a "enhancement" not a "necessity"
     
  7. drpenguin

    drpenguin Senior Member

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    just go with a 2.25 exh. Make sure there is as little bends as possible. If your going to turbo you want a free flowing exh no if ands or buts about it. you can keep your stock but turbo lag is gonna be your best friend till you get a bigget pipe! And Fuck the police if they pull you over for noise tell them that a harley is louder then your car and tell them to piss off!
     
  8. jimboburgess

    jimboburgess Go fast, Go Cheap

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    I'd believe it, I say not worry about it. The difference between what you have now and what you have is probably not as different as some people think, considering gains from a stock exhaust to a test pipe are around 20 hp or so depending on the engine. Maybe. . .
     
  9. CRXSI91

    CRXSI91 Senior Member

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    well,they will probably charge me about 160 to 170 at the muffler shop to do 2.25'' piping..cus ive done it twice before in my crx's...and i dont know if i'll have that much money tommorow...ill try to get 2 and a quarter though....
     
  10. CRXSI91

    CRXSI91 Senior Member

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    see thats what im thinking also..and plus..i mean 95% of the time,pissedoffsol is right about what he says...and if he told me that my stock exhaust wouldnt hurt anything but my power..im gonna tend to believe him...

    the other thing i want to tell you guys is..im gonna be boosting 6psi...NO HIGHER..im just trying to feel a little bit of boost...im not gonna be racing it until i upgrade my radiator and etc....which is why i trying to leave the exhaust stock for now...i could understand if i were trying to boost 15 psi on a t3/t4 and race it on the track every week..but 6psi,just normal driving (and getting on it from time to time of course)..i think my exhaust/motor can handle it...


    Bump...for more opinions. :worthy: :worthy:
     
  11. jimboburgess

    jimboburgess Go fast, Go Cheap

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    Yeah, you're fine then.

    when it comes down to it it seems like it is a good idea to at least match the pipe size to what size the turbo has on it's exhaust, i like the idea of stepping up the pipe a little so you can have more air flow through mufflers and cats. i.e. a 2 1/2" inch muffler has more flow than a 2 1/4''
     
  12. B16CRX

    B16CRX Senior Member

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    open downpipe OWNS.
     
  13. 9sech22civic

    9sech22civic Senior Member

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  14. CRXSI91

    CRXSI91 Senior Member

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    ok..so i get the test pipe..and bolt it up to my turbo downpipe....are u telling me to run just a downpipe,and a test pipe? or are u telling me to bolt that test pipe up to my exhaust?
     
  15. B16CRX

    B16CRX Senior Member

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    hes saying bolt teh test pipe to your exhaust. it wont do shit if tehre isnt an exhaust hooked up to it.

    I didnt do a test pipe. I just made my DP long enough to meet up with my exhaust. problem solved.
     
  16. CRXSI91

    CRXSI91 Senior Member

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    nevermind...i found the solution..thanks guys.
     
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