6-CYL Pipe Size

Discussion in 'Technical' started by rickm, Jul 14, 2013.

  1. rickm

    rickm Member

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    I now have a 6 into 1 header for my 200-6 and wonder what is the best size pipe to run to the back ? Keep in mind that I may install a 250 head and now have a 2 barrel on it. If I go with a 250 head and bigger valves I want to already have the right size pipe for these conditions Thanks Rick
     
    rickm, Jul 14, 2013
    #1
  2. Gene Fiore

    Gene Fiore Member

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    What other modifications have you made to your engine, if any? That would help to determine what size pipe would be best. Without knowing I would not go over 2 inch inside diameter. If you have made other internal mods like bigger camshaft and higher compression etc you could go 2 1/4. I currently have a 6 into 2 header with dual exhaust and I am running a 2 inch pipe but could probably go 2 1/4 for a bit more performance.
     
    Gene Fiore, Jul 14, 2013
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  3. rthomas771

    rthomas771 Member

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    After reading everything I could find about BMW and Jaguar inline 6 exhaust I decided to go with 2-1/2" with my 6-2-1 header. After the turbo muffler it spits into two 2" pipes over the axle and exits behind each rear tire. http://1bad6t.com/Maverick/maverick_43.html
     
    rthomas771, Jul 14, 2013
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  4. jsmithink

    jsmithink Member

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    Nice page rthomas!
     
    jsmithink, Jul 14, 2013
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  5. Crazy Larry

    Crazy Larry Member

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    4-inch with a coffee can on the end.
     
    Crazy Larry, Jul 15, 2013
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  6. 74LDO

    74LDO Member

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    Nice Sound RThomas, Not The Usual Six Odd Frequency
     
    74LDO, Jul 15, 2013
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  7. groberts101

    groberts101 Member

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    2 1/4 compression bends for a milder build.. and 2 1/4 mandrel bent for higher airflow and performance.
     
    groberts101, Jul 19, 2013
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  8. 74merc

    74merc computer nerd

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    That is a sweet sounding six.
     
    74merc, Jul 20, 2013
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  9. adam 72

    adam 72 Member

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    ^^^this guy. THere's also a chart and an article talking about sizing up the pipes on a six at classic inlines

    http://classicinlines.com/proddetail.asp?prod=WAE-200-ISS

    Think you should figure out how many ponies you're making and how many you want in the future.
     
    adam 72, Jul 23, 2013
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  10. Mhackett

    Mhackett Member

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    Really nice page
     
    Mhackett, Jul 23, 2013
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  11. bmcdaniel

    bmcdaniel Senile Member

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    Hmmm, I didn't think a 250 head fit on a 200.
     
    bmcdaniel, Jul 23, 2013
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  12. adam 72

    adam 72 Member

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    It fits. Highly encouraged. Flows better from what I understand. May need to mill it for desired for CR
     
    adam 72, Jul 23, 2013
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  13. rthomas771

    rthomas771 Member

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    200 and 250 used the same exact head. Later model head had bigger intake log and larger intake valves
     
    rthomas771, Jul 23, 2013
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