So we sit down with a Head design program, or APP as it would now be called, and work through the variables and try a few scenarios to get the right squish band and then we have to consider the part inside the squish band. Wide is typically better for MX type motors and narrow is more suited to high revving race motors. Usually expressed as percentage of the bore area. And then there's the width of the squish band. The data is out there on target MSV for different applications. Thinner creates a higher gas velocity which is expressed as MSV Mean Squish Velocity. Next thing to get right is the depth aka thickness of the squish band. The first thing to get right is the squish angle which has to work with the pistons and those are curved, so there's the first challenge. The technology has been around for a long time. Maybe we have someone better than I lead and we all pich in $.Įlse I have no worries detuning that suz bulletin a bit for the use I defined above. Is there is a potential commercial squish head out there that works for T500? Or is there a company that has taken a T500 head (saved the procedure) to fill and then machine out and existing T500 head into a squish (still street gas compression 7.0 : 1 for example) that wasn't done as a one up or IP for a specific racer? usually some iterations is required when i lead the way based of a "chat" versus the exact design dimensions needed. The squish heads has come up many times for bikes like the T500 and I (part time hobby) see no ready commercial solution? I find there is more risk being the guy who works with some fabrication house to develop a first prototype head that can be used first cut. (Not only a squish head, but one that had more efficient cooling design too). Also my experience air cooled engines just can sustain high duty cycle runs for they can't shed the heat and will fail regardless. The fact I fear the pistons will shatter may keep me from doing more foolish stuff and with a stock old bike design. fast 0 - 60 mph stop light stuff or drop down a couple gears and do a quick 40 - 70 mph then back off. It depends how much power gain you want and how you plan to use itįor example I am thinking 1/3 to half the power gain shown in that bulletin and then only use it short duty cycles is my MO: aggressive street use.
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