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  • Backpressure?

    I'm a little confused on how this works I have 3" borla cat back exhaust and I just installed my rk sport headers a few days ago. Question is I've noticed that the low end isn't there like it was before after the header install I've read some posts and some people say thay you lose backpressure and thats what causes it. I have my stock cat still on should I go with a high flow one or would that help or hurt my situation. Also some have said that I should get a s-pipe installed but since I have a cat back system don't I already have one. Basically what can i do to get that low end back
    thanks
    look on one of the v8 boys face when he finds out he just lost to a v6 \"ha ha priceless\"<br />2000 camaro Mods: Slp cai,kn filter,whisperlid,talor spiro wires,ngk plugs, rk sport headers, 3\" Borla cat back exhaust,3.73\'s with lsd,pro 5.0 shifter,2002 Corvette wheels, lowered and 1\"1/4,painted calipers black with chrome camaro decals, hypertech programmer

  • #2
    Moving this to the Intake/Exhaust forum.
    Keith - Chicago<br /><a href=\"http://www.hptuners.com\" target=\"_blank\">HP Tuners - PCM Reprogramming</a><br /><a href=\"http://www.dxsoftware.com/magnus/\" target=\"_blank\">97 Firebird V6 to LS1 swap</a><br /><b>V8 9.967@132.78</b> 1.322 60\' NA Heads/Cam<br /><b>V8 10.295@128.48</b> 1.363 60\' NA Cam Only<br /><b>V8 10.987@119.31</b> 1.422 60\' NA Stock Internals<br /><b>V6 13.674@98.22</b> NA<br /><b>V6 12.394@104.91</b> N20 100HP

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    • #3
      do all the intaek stuff you can. that's the only way of ever getting it back. if it still isn't very good down low, you'll need heads/cam, rockers, sc/turbo, ect.
      2001 Arctic White Firebird<br />More mods than I\'m allowed to list!

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      • #4
        I just replaced my Cat converter yesterday with a high flow cat and notice a difference in the higher rpms... It feels like it is pulling harder in the 3500-5500 range. From what I have read, the high flow cat actually takes away from your low end and adds to your top end. I may be wrong, but it seems like this would hold true because of the pull that I get in the upper range. I haven't had the cat installed long enough to determine a loss in my low end, but I will surely find out this weekend.

        Here is a site you can check out.

        http://v6camaro.homestead.com/cat_ipipe_flow.html

        I found it to be very informative, but this is only one person's opinion. There are also sound files you can download from that site. It could possibly be someone's site from here, but I'm not sure who....sorry! hope this helps.

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        • #5
          <blockquote>quote:</font><hr>Originally posted by Arctc Wolf:
          do all the intaek stuff you can. that's the only way of ever getting it back.<hr></blockquote>

          GOOD POINT! have you done any intake mods???

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          • #6
            Mine seems to pull fine at low rpms. I have intake modifications. Getting a power pack soon as welll hehe.
            1999 Firebird Black<br />A4 3.08 gears<br />Mods: Carbon Fiber Whisper Lid, Raised Air Box, K&N Air Filter, Direct Hits Ignition, Flowmaster American Thunder 3\", 160 Degree Hypertech Thermostat, SLP Fan Switch, 3\" High Flow Cat<br /><a href=\"http://www.cardomain.com/member_pages/view_page.pl?page_id=273903\" target=\"_blank\">My car on Cardomain</a>

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            • #7
              Yeah i have slp cai,kn filter, whisper lid thats all I have as far as intake goes I agree that it seems like I have more in the higher rpms than I did before. I apreciate the posts guys do any of you suggest getting the high flow cat also and if I do will I lose even more low end
              thanks
              look on one of the v8 boys face when he finds out he just lost to a v6 \"ha ha priceless\"<br />2000 camaro Mods: Slp cai,kn filter,whisperlid,talor spiro wires,ngk plugs, rk sport headers, 3\" Borla cat back exhaust,3.73\'s with lsd,pro 5.0 shifter,2002 Corvette wheels, lowered and 1\"1/4,painted calipers black with chrome camaro decals, hypertech programmer

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              • #8
                I HIGHLY suggest getting the High flow cat! I have not noticed any loss in low end....

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