duneslinger Posted August 26, 2004 Report Share Posted August 26, 2004 I was looking at some tecate cylinders that where portted for flat trac racing and there was a extra set of ports in the reed area of the cylinders going stright down into the case below the reeds not the thumb/boost ports to the sides. is this to add to the upper aux boost port when the piston comes down and pushes the fuel charge up the transfer ports? has any one tried it on a banshee?? Quote Link to comment Share on other sites More sharing options...
rebelbanshee2 Posted August 27, 2004 Report Share Posted August 27, 2004 sounds like passion racings 12 port setup...whcih is sweet Quote Link to comment Share on other sites More sharing options...
BansheeEaterKXF Posted August 27, 2004 Report Share Posted August 27, 2004 (edited) kawasaki motors were all ways top of the line even in there bikes.Those ports were not added (maybe opened alot more)they come stock with them in there but yes they can be added to a banshee for a super flowing effect with the correct set up like the 12 port system Edited August 27, 2004 by BansheeEaterKXF Quote Link to comment Share on other sites More sharing options...
BdBanshee Posted August 27, 2004 Report Share Posted August 27, 2004 I put them in my Banshee cylinders, they work great. I have done several other sets too. I weld up the outside of the cylinders before even putting those in anymore, otherwise some of them break through to the outside. The 250R motor has them in the stock cylinder too, they are huge. Quote Link to comment Share on other sites More sharing options...
PassionRE Posted August 27, 2004 Report Share Posted August 27, 2004 If I remember correctly the Kawasaki ports he's talking about are verticle from the cases to the reed areas along with another set of ports simular to my 12 port but not exactly the same and more restrictive than the 12 port....that set-up is actually based on crank volume instead of desired turbuelance of internal gases....Jim Quote Link to comment Share on other sites More sharing options...
BansheeEaterKXF Posted August 28, 2004 Report Share Posted August 28, 2004 are you sayin that a kawasaki cylinder ported will not flow better than you 12 port system? Quote Link to comment Share on other sites More sharing options...
PassionRE Posted August 29, 2004 Report Share Posted August 29, 2004 (edited) are you sayin that a kawasaki cylinder ported will not flow better than you 12 port system? NO, Im definately not saying that. I am saying if the Kawasaki finger ports, or Honda 250R motors for that matter, were set up like the 12 port they would be flowing much better than they are. Remember, the Kawasaki and Honda motors have much larger reed assemblies and could be made to flow alot more than a Banshee cylinder, even my 12 ports. I was mainly referring to the verticle ports on the Kawasaki cylinders being a different philosopy entirely. Most added boost(finger) ports added to banshee cylinders flow directly into the transfer updraft bridge causing major inlet turbelence, Ive solved that problem. Not only did it solve that particular situation it also created positive effects on inlet flow of gases coming in from the main intake ports and also positive effects of updraft gases in the rear transfers. Anyone with a set of my 12 ports knows how I did it...Jim Edited August 29, 2004 by PassionRE Quote Link to comment Share on other sites More sharing options...
SICK BOY Posted August 30, 2004 Report Share Posted August 30, 2004 PassionRE, I'm thinking of getting some port work done this winter.How much do you charge for your 12 port job? Thanks Quote Link to comment Share on other sites More sharing options...
BansheeEaterKXF Posted August 30, 2004 Report Share Posted August 30, 2004 (edited) ok then my next question is that how is your 12 port system on the bottom end or when you roll off the throttle?an also when you port do you bench flow it? Edited August 30, 2004 by BansheeEaterKXF Quote Link to comment Share on other sites More sharing options...
racer Posted August 30, 2004 Report Share Posted August 30, 2004 How much do you charge for your 12 port job? $500, i think. check his website to be sure. www.passionracingengines.com Quote Link to comment Share on other sites More sharing options...
PassionRE Posted August 31, 2004 Report Share Posted August 31, 2004 (edited) ok then my next question is that how is your 12 port system on the bottom end or when you roll off the throttle?an also when you port do you bench flow it? When jetted in perfectly the 12 port stroker will make excellent bottom end and throttle response along with a very hard pull through upper rpm ranges. This engine piped closely produces a very flat torque curve from around 6000 through 9300 rpm and pulls to 10k before the pipes drop off. It also pulls tall gears easily with more top-end than most are really comfortable with. As for the flow bench, Passion is a very young company and gathering tooling currently to offer more product choices in the near future. Currently I am using the most productive method of designing engines available along with 25 years experience. I simply measure the angle of deflection of the roost bouncing off the upper one third of the helmets of the guys trying to catch one on a 1/2 mile shortrack...Jim Edited August 31, 2004 by PassionRE Quote Link to comment Share on other sites More sharing options...
duneslinger Posted August 31, 2004 Author Report Share Posted August 31, 2004 [ I simply measure the angle of deflection of the roost bouncing off the upper one third of the helmets of the guys trying to catch one on a 1/2 mile shortrack...Jim cool dyno Quote Link to comment Share on other sites More sharing options...
duneslinger Posted August 31, 2004 Author Report Share Posted August 31, 2004 if added to a banshee would these help or hurt performance? Quote Link to comment Share on other sites More sharing options...
BansheeEaterKXF Posted August 31, 2004 Report Share Posted August 31, 2004 Lmao Quote Link to comment Share on other sites More sharing options...
racer Posted August 31, 2004 Report Share Posted August 31, 2004 [ I simply measure the angle of deflection of the roost bouncing off the upper one third of the helmets of the guys trying to catch one on a 1/2 mile shortrack...Jim cool dyno how does that compare to me seat-of-my-pants-jet dyno? can you give me some algebraic comparisons? Quote Link to comment Share on other sites More sharing options...
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