The only fuel my bike has ever seen is 100 octane racing fuel. I'm pretty sure premium would be fine with the bump in compression.Oh my! You think you will be able to run 91 octane safely? Any other mods like cams? Jevers
Being a bit of a novice when it comes to engine building, I have to ask.So 10.5 SCR I'm sure is based on an all factory config, chamber volume, pin compression height, etc, but you really won't know what actual SCR is until you actually measure.
Point is, curious as to what SCR actually comes out to.
That will also be needed to correctly have a cam ground, and you can compensate for SCR some and control detonation that way.
Many street cars have that type of SCR and run on pump gas, just to say. But, they are liquid cooled.
Considering the head is aluminum, running 91 shouldn't be difficult at all, but will still take some planning.
https://www.enginebasics.com/Advanced Engine Tuning/Static vs Dynamic.htmlBeing a bit of a novice when it comes to engine building, I have to ask.
What is does " SCR " refer to? Thanks. Jevers
40115M08500 Product Detail Information - Wiseco Piston Inc.If you have the part number of the ones you got post that too please, as well as the spec sheet that came with them, would be a great reference.
The stock pistons are 9:1 the wiseco 10.5:1Yes, static compression ratio, sorry about that!
Anyway, since it has to come apart to install those, you can CC the head volume, and the OE piston relief volume(s) and pin compression height. Also check compressed thickness of head gaskets.
My understanding is the tolerances are not very good, and that could be part of the reason they choose to make the compression ratio lower from the factory. Poor fuel availability is also a possible reason.
Point being, I bet there's differences between the two cylinders. Getting them as close as possible can actually be a noticeable power gain. Some simple head/port cleanup can provide considerable gains too.
Do me a favor, when you tear into it, post pics please. Maybe even start a new engine thread.
I like the fact the pistons to have the coated skirts.