Driveline Performance Posted December 22, 2014 Report Share Posted December 22, 2014 New piston option for 68mm bore cylinders with a 6mm higher pin height like the 573mo6800 (blaster piston). This piston has a few changes that improve longevity, increased oiling to the needle bearing and larger repositioned intake windows. These retail for $89.95 each and are now available. Happy holidays. Side by side comparison with a blaster 573mo6800(right). A 573mo6800 piston in a 4, 7, or 10mm stroker cub cylinder at bottom dead center. New Driveline Perfomance piston at bottom dead center. Same piston crown profile as the 573mi6800. 1 Quote Link to comment Share on other sites More sharing options...
04_blu_shee Posted December 22, 2014 Report Share Posted December 22, 2014 I'm building A new 4 mil CP Cub what is the improved set up on the windows? Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted December 22, 2014 Report Share Posted December 22, 2014 I'm building A new 4 mil CP Cub what is the improved set up on the windows? With the windows being raised on the intake of the piston, they are fully open at bdc. While the blaster piston is almost shut off at bdc. The raised windows also will improve piston life and should do away with the intake bridge cracking problem the 573's have. Quote Link to comment Share on other sites More sharing options...
SOUTHTHIRTY Posted December 22, 2014 Report Share Posted December 22, 2014 Seems like a win win Quote Link to comment Share on other sites More sharing options...
Dixie normus Posted December 22, 2014 Report Share Posted December 22, 2014 Innovation Quote Link to comment Share on other sites More sharing options...
mailman Posted December 22, 2014 Report Share Posted December 22, 2014 Any performance advantages with these? Do the blaster pistons have issues with wrist pin bearings staying oiled? Usually when windows are made larger, it weakens the skirt which reduces the life span of the piston but since you moved the windows up, it appears that the skirts will be stronger. Do you have any of these in motors right now? Quote Link to comment Share on other sites More sharing options...
Driveline Performance Posted December 22, 2014 Author Report Share Posted December 22, 2014 There might be a little performance gain just because the motor should pull a little more fuel and air in with the windows being slightly larger and in a better location for a longer intake duration. I just got these pistons in so I have not had a chance to dyno test them in an engine yet. The 573 Blaster piston has always bothered me as far as using it in a Banshee engine. Don't get me wrong I've used them in my motors for years and they do work fine but I always thought there could be a better designed piston for the Banshee. My two main goals when I designed these pistons was to have the windows higher on the skirt for a longer intake duration and to try and strengthen the intake side of the piston by raising the windows and putting them in a position where there's less stress. Remember, the Blaster piston was designed by Yamaha to be used in a Blaster engine that makes 16H.P. stock. They weren't thinking about piston window location on a high H.P. Banshee stroker engine. The third small benefit from raising the windows is the upper rod bearing will get more lubrication. Did it need it? Maybe... maybe not but it can't hurt. Quote Link to comment Share on other sites More sharing options...
registered user Posted December 23, 2014 Report Share Posted December 23, 2014 still learning the ropes here. whats the reasoning behind this new piston. all the 68 bore cylinders previously had only one choice and that was a blaster piston ? Quote Link to comment Share on other sites More sharing options...
Dixie normus Posted December 23, 2014 Report Share Posted December 23, 2014 I'm pretty sure the blaster piston was considerably cheaper. Although it has a different done design Quote Link to comment Share on other sites More sharing options...
possum Posted December 23, 2014 Report Share Posted December 23, 2014 some peoples kids I tell ya. Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted December 23, 2014 Report Share Posted December 23, 2014 The blaster piston(573mo6800) was/is the piston for a 115mm rod. Our new 11901mo6800 is the new option for a long rod application, whether it be a 4, 7, or 10mm stroke with the 115mm rod. trinity or cp now has a 9768mo6800 piston that is for the 110mm rod, a standard pin height 68mm piston but retails for $130. Same with wsm they make a std pin height piston for the same application and price. These pistons would be used in a 4mm stroke with 110mm rod crank or more commonly used in a stock stroke 110 rod 392 cub. Both the 9768 and wsm are fine pistons, Ive used them both but price and availability are their down falls. Quote Link to comment Share on other sites More sharing options...
registered user Posted December 24, 2014 Report Share Posted December 24, 2014 (edited) thnx for the further explanation but still im not clear on why move the wristpin. if for example you look at a 68x58 cylinder, cylinder height is set up only for a 110 rod and to use a 115 rod you have to lower the pin height or otherwise use a spacer plate ? the cp website shows alot of combos, so i assumed each cylinder was cast specifically for that particular rod length and stroke what about if you want to use even a longer rod like 120 or 125 etc ? is the cylinders cast for these longer rods or is a spacer plate the only option ? the website says for a 68x64 it has 3 rods options, 115, 120, 125. so if you were to use a 125 rod is the cylinder cast for that rod length or is there some piston with the pin moved 10mm higher or a spacer plate ? Edited December 24, 2014 by registered user Quote Link to comment Share on other sites More sharing options...
Dixie normus Posted December 24, 2014 Report Share Posted December 24, 2014 Longer rod = higher pin height on piston Quote Link to comment Share on other sites More sharing options...
registered user Posted December 24, 2014 Report Share Posted December 24, 2014 (edited) dude i apreciate the help but you dont know what your talkin about. the rod can be a mile long and use any pin height you want. if you look at the cp site is shows some cylinders can use several different rod lengths. for example 115, 120, 125 on the 68x64 engines. is there only 1 cylinder casting , meant for a 115 rod, (or 110 rod on the smaller engines) ? or is each cylinder cast taller to accomidate the specific longer rod (120, 125) ? this is what i was wondering. since driveline is making a piston with a higher pin, i assume theres only one generic casting and thats for a 110 rod on the smaller engines and a 115 rod on the larger ones. this new piston lets you use a 115 rod in a 110 cylinder without a spacer plate. thats how im enterpreting it anyways Edited December 24, 2014 by registered user Quote Link to comment Share on other sites More sharing options...
m671054 Posted December 24, 2014 Report Share Posted December 24, 2014 I thought cp site also listed the piston that was meant to be used depending on rod and cylinder casting. Ben awhile since i've been on there though. the drawing used to list port height measurements that you could use in software to calc timings, durations and deck height. You would have to get piston specs straight from wiseco tech though. Not many people share piston specs Quote Link to comment Share on other sites More sharing options...
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