namura piston with wiesco

[squish]

Hey here is my old wiesco with a namura piston paired with a pin going through them. Look at the difference at the window placement. whats up with that?

[dawarriorman]

Im pretty sure the Wiseco is in the same place as stock, but now that I think about it, I can't remember when in the stroke the window is matched up with the intake. With the window placed higher up in the piston, it would be fully uncovered lower in the stroke (possibly only at the bottom). I would think that wouldn't be as good. With the window lower, the piston has started traveling upword, and begun to pull negative pressure in the crank when the windows are fully uncovered. All speculation though.

 

The more I think about it, I think one would be more friendly towards high rpm, but not really sure without seeing them in the cylinder.

Edited December 6, 2005 by dawarriorman

[Shee-Male]

I dunno man, your sure they're the right application?

[fast500#12]

i am runnnig the namura's in my bike and they work pretty good. i can't tell you a performance differance because my bike was stock before and now its got a pretty agrresive port job. all i know is it rips.

[2twin350s]

by moving the ports they alter the duration of fuel flow into the cylinders. hence that is how they get the power piston name. they work well. i run them in both my shees and i have over 200 hours on them. no problems. put them in and enjoy

Edited December 6, 2005 by 2twin350s

[dawarriorman]

by moving the ports they alter the duration of fuel flow into the cylinders. hence that is how they get the power piston name. they work well. i run them in both my shees and i have over 200 hours on them. no problems. put them in and enjoy

445737[/snapback]

More top end then?

[2twin350s]

well i would say, a better low to midrange hit. they claim to boost 4h.p. in the midrange. but then again, my bikes are all setup for low end like i said i have run them 2 years now and no problems.

[Shee-Male]

would these be the same set up as the vito's power pistons?

[dawarriorman]

I believe the vitos pistons cut the deck of the piston on the exhaust side, which basically is like raising the exhaust port.

[2twin350s]

would these be the same set up as the vito's power pistons?

446207[/snapback]

they are a knock off of vitos pistons. i think the vitos are a little better

[crank67]

looks like vitos power pistons . they move port timing with higher intake holes in the piston this is good more hp. abought 3 to 5 more . horse power. they look like good pistons never heard ov that companey name . are they cut off on xsost side?????? if so you will love them...... i got a set vitos power pistons board 100 over in my bike and i pound the shit out ov it and it runs great .. hase for 2 years now knock on wood..... sorrey abought last garbeld up mess my son tried to answer your question for me and i could not even under stand it my self

Edited December 11, 2005 by crank67

[BigRed350x]

i am runnnig the namura's in my bike and they work pretty good. i can't tell you a performance differance because my bike was stock before and now its got a pretty agrresive port job. all i know is it rips.

445532[/snapback]

 

get rid of those things asap. i made the mistake of running them once and they last 3 weeks. pulled them out honed it and put in wiseco's and itran for a year with no problems. put in a set of namura on the next rebuid, they lasted a month that time. put in wiseco and it ran fine for another year.

 

namura blows ass.

[dawarriorman]

vito  are made by  wiescoo    to    next time you get    a vito  read  the box  or  underside  of pistons  they  are  a  good piston  jut the  same  i  run  a  setof  100.over  4mm crank  detas  spacers  and  7  degree key    pj34carbs    cool head 20cc domes    and a set  of    fmf  narley    mild port job    i  torture  it  never  blown it  up i run  17  front 41 rear  ben clock  at  105mph    it  eats  up  my    440 big bore witch  is  all done  up to with  wsm  pistons  i think  vito  are one  ov the best  i frid  manney pistons  prox  sucks  dont last long

447091[/snapback]

What did you say? Try these things called sentences. Combine them with punctuation, and we might understand you.

[Wicked98Shee]

hmmm wonder if he rides like he types

[ogre03]

evidently he's a bad som bitch if he's runnin 17 / 41's with a "mild port job... but then again, HE HAS THE VITO'S!!