I also failed to mention that the camshaft plays a role. I am using a fairly short duration camshaft without much valve overlap in this project since it is intended to be more of a torquey street engine. This impacts the dynamic compression (when the engine is running). What I show in the video is static compression based solely on dimensions without taking into account the camshaft. If this engine had a camshaft with more duration and overlap, it may run just fine on pump gas with the 18cc head. This just further illustrates my point that you can't just go throwing parts together without a thorough understanding of how they actually work in relationship to one another.
Yeah, my personal 236 is 12.5ish to 1 and it’s not bad. They are usually fine with the compression release on the cam. Intake valve closing point really makes a difference too. Really changes the dynamic compression.
If I inadvertently offended your uncle Bob, I’m sure he will be fine. And he is not to be confused with uncle Tony youtube.com/@uncletonysgarage?si=eaaUkQn5z7jaGfJs. So don’t be messaging him saying I’m talking smack.
I also failed to mention that the camshaft plays a role. I am using a fairly short duration camshaft without much valve overlap in this project since it is intended to be more of a torquey street engine. This impacts the dynamic compression (when the engine is running). What I show in the video is static compression based solely on dimensions without taking into account the camshaft. If this engine had a camshaft with more duration and overlap, it may run just fine on pump gas with the 18cc head. This just further illustrates my point that you can't just go throwing parts together without a thorough understanding of how they actually work in relationship to one another.
I'm at 12.08to1 I pull start just fine. Run the shred head man you will love it.
Yeah, my personal 236 is 12.5ish to 1 and it’s not bad. They are usually fine with the compression release on the cam. Intake valve closing point really makes a difference too. Really changes the dynamic compression.
If I inadvertently offended your uncle Bob, I’m sure he will be fine. And he is not to be confused with uncle Tony youtube.com/@uncletonysgarage?si=eaaUkQn5z7jaGfJs. So don’t be messaging him saying I’m talking smack.