Yes, I was pointing out why it was, not apportioning blame because I can see why. Ultimately what you need to do is get someone to design the best piston for your application and do your own R & D.digger wrote:i agree on the R&D when you are going to sell thousands and thousands of sets the cost of R&D can be readily absorbed. when you order a one of set off custom pistons they wouldn't do any testing specific to your application, its all best guess, generic, err on side of caution otherwise its too expensive.4vpc wrote:They're just nowhere near as intelligent and/or haven't put the required R&D in, not all obviously, but some surprisingly big names.BigBro74 wrote:
Or maybe they just have different design criteria/constraints
like some shmuck putting 30 psi boost or bunch of nitrous.....................you pick, but usually not warranty at 100,000mi or emissions....
You can put a lot of boost and make a lot of power through a stock F20C piston.
What i'm trying to point out here is that there are pistons out there which are readily available for you to study, like anyone else I started out thinking a piston is just a piston right? Slowly it dawns they ain't, then holding one of those was like they'd reinvented the wheel . Knowing what they have done is easy, why they did it something else. Getting someone to replicate it? This is where I realised some manufacturers are just plain dumb. When you show them what you want they didn't even know it existed, they look at you like you just stepped off a spaceship. 'Oval around the crown? Are you kidding? You mean like the Honda bike with two conrods?' And those that do recognise it don't have the machinery to do it - or say they don't and this is 25+ yr old technology we're talking about here.
Did you check out the bore clearance in that manual? Honda are saying it's worn beyond service limits with a much smaller clearance than you're boring to in the first place!