porting a/c 172

Discussion in 'Maxiscooter Tuning' started by baz172, Aug 29, 2008.

  1. baz172

    baz172 Member

    Messages:
    235
    when i get down to porting my scoot will the standard pipe let enough of the burnt gases out ???? and does any one have any idea where pm52 or jolly moto make peak power cause i'll have to port to suit if i use one of these ??? its fookin confusing this porting lark , thanks again lads
     
  2. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

    Messages:
    14,276
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    et2 monster
    you dont understand what your doing, dont touch a dremmel just yet. get reading.
     
  3. baz172

    baz172 Member

    Messages:
    235
    dont worry dremel is out of harms way not planning on ruining anything yet gonna be over crimbo hols when damage is done just trying to get clues to this secret they call porting, and i'm dead tempted to just pay you to do it but wheres the fun in that
     
  4. MiNoR cOnFuSiOn

    MiNoR cOnFuSiOn Administrator Staff Member

    Messages:
    14,276
    Rides:
    et2 monster
    well you have the right idea.., pick the pipe and kit you want to run then tune around that. problem is how do you know what will narrow the powerband to the points you want? the exhaust port is where everything lies. its shape, hight and width seriously alter everything so get reading up. to keep things simple flatten the top to the highest point of the exhaust port. this will reduce the blowdown timing to prittymuch nothing. then grind crescent shapes a buit at a time upwards from the centre outwards. problem is you will rebuild the top of your engine 50 or so times befor your happy wiht it and by the time your happy wiht it youve obviously lost power as the last grind befor the one you just did was better hence you stopped... LOL i would sell a port map but it will be everywherre in a mattter of hours.

    ether figure it out yourself or have somone do it for you. no wayt of explaning it to you tbh
     
  5. baz172

    baz172 Member

    Messages:
    235
    thanks and i understand why you wont sell port maps to anyone cause you got a buisness to run thanks for the advice
     
  6. Dec

    Dec Active Member

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    3,183
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    nothing ugm
    are port maps different for every barrel or is it the same sort of concept,
     

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