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Thread: What's the smallest exhaust pipe you would use?

  1. #1
    Senior Member
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    Grant
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    Default What's the smallest exhaust pipe you would use?

    Hey guys, sorry to spam...

    I measured my exhaust piping....the whole system is about 2.5" but the pipe coming out of the back of the muffler is 1 and 3/4"! Could that be robbing me of 20 or so hp? I'm trying to figure out where to trouble shoot. The engine seems pretty healthy, have it timed at 12 BTDC.


    Thanks for the input!

    PS.
    2.5" is 6.35 CM
    1.75" is 4.45 CM

  2. #2
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    Dave
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    Default

    20hp!!!!

    haha

    nope.

    id say it certainly wont me making more HP, but i doubt you coudl measure the horsepower loss. think about the restrictions the mufflers cause.

    what engine you talking about? i have 2.25" all the way through on my 4age (with cat resonator and straight throught muffler).
    since you say its timed at 12BTDC i assume you mean a 4kc or 4ac. if so...do they even make 20hp

    i swear my old 4kc didnt make 20hp.
    In faith there is enough light for those who want to believe and enough shadows to blind those who don't.
    - Blaise Pascal

  3. #3
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    Haha, sorry I can see that sounds nuts if I didn't say what engine I have. I'm trouble shooting an ae111 in my ae86 chassis. I've never driven another 20V, but other than the mid-range, I think the engine is missing a lot of power. The car is some what quick...but not fast. I was assuming 165-170hp in a 2,200 lb car would be pretty fast.

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