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Question About Horsepower Loss?

Discussion in 'HYBRID -> EG-EK / DC' started by NeedACivic, May 31, 2003.

  1. NeedACivic

    NeedACivic Member

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    I have a 94 JDM GSR with a Skunk2 Intake Manifold and a generic short ram air intake in my 92 Civic CX Hatchback. I have drove my car running straight header with NO exhaust and then i drive it now with my stock 1.5 or 1.75" exhaust and i feel a pretty big power loss, my question is how much hp do you think im losing due to having a completly stock exhaust?

    Also what size piping do you think i should go with when i get it all re-done?(P.S. I plan on forced induction in a couple years)

    THANKS!!!
     
  2. JDMilan

    JDMilan Senior Member

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    No clue, maybe 50, once you put some apc vinyl you should gain it back...................


    seriously, get a 2.25"-2.5" mandrel bent header back system and your good to go. Going NA of course.



    Milan
     
  3. xj0hnx

    xj0hnx I wanna be sedated VIP

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    I did the same with mine B16, ran it through the stock VX exhaust. It was horrible, but yea like Milan said, some 2.25''-2.5'' will do you some good.
     
  4. Havok

    Havok Senior Member

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    With boost, you want 2.75 or 3" piping...In the meantime, get a full CAI, the difference between the two is night and day--the short ram is basically just sucking up warm air floating around in the engine bay.
     
  5. Daiser

    Daiser Junior Member

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    HAhahahah ....... You are My Hero ...
    Like He said Man... The APC vinyl Adds a Good 120 hp At the wheels and 53-124 Ftlbs ... Of torque......... But Depending on the Status Of your car. (Daily Driver or Track Car) You probabally wanna go with 2.25's.... That is a nice Generic number for an Engine that Fuckin Breathes.......
     
  6. FORTUNE COOKIE

    FORTUNE COOKIE Redline Racing NM

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    what Afipunk21 said.......a tru cai..........u will definteley feel a major diffy man in tha breathing of ur car!!!!!!!! short ram is more direct and has a better response time but ur still suxin in warm 2 hot air in ur engine bay!!!!!!!!!!

    on ur piping tho.....i say 2 1/4 - 2 1/2 piping on ur ride if ur goin n/a dawg!!!!!!!!! also i don't kno how strict ur emissions r but running headers str8 2 tha exhaust open it up a lot more also!!!!!!!!! in my state we have no emissions so most of us do this!!!!!!!!

    :D B) :worthy:
     
  7. JDMilan

    JDMilan Senior Member

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    dido with what AFi said if turbo then larger like 2.75+so the turbo can spool up. I always say for higher reving NA apps to go with 2.5, get a header that has a 2.5 collector along with some generic testpipe. Or go with my favorite setup for NA

    SMSP header
    2.5" all the way back with no resonator
    ES oval muff (flat black , nice and tiiite, lol)


    Milan
     
  8. deth101

    deth101 Senior Member

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    obviously almost any exaust setup wont have the power of straight headers,youll still feel a loss...engine braking...right?
     
  9. JDMilan

    JDMilan Senior Member

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  10. deth101

    deth101 Senior Member

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    thats what contained exaust does....engine brake,just jike semi's,any exaust back pressures at least a little thereby not letting all the gases escape the cylinders in-turn not letting as much o2 in on the next rotation=less power,str8 headers are always more powerful cause no back pressures.now I am kinda new to the small engines but an engine is a engine,am I right,maybe the exausts on these honda's are perfect but mine isnt and I dobut any exaust flows completely open,but again I could be wrong
     
  11. jamiedude

    jamiedude Senior Member

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    straight headers sound good but what about the lacking of back pressure.
    wouldnt you burn up your valves?
     
  12. deth101

    deth101 Senior Member

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    your cam,not backpressure, should? control your valves.and a header still has a little backpressure.
     
  13. xj0hnx

    xj0hnx I wanna be sedated VIP

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    Are you two talking about "straight pipe" from the header to the muffler? ie: no cat.
     
  14. deth101

    deth101 Senior Member

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    no,I was just stating that anything,even headers create a little backpressure so any exaust will seem like a powerloss if you've been driving w/just headers due to increased backpressure,but as I stated this has been my experience with deisel semi's,v-8's,motorcycles,havent played w/my honda exaust system much yet but cant imagine a difference...........basicly I was trying to explain powerloss from engine braking.I would dig your prospective,I generaly trust and like your comments :D
     
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