Let's take a look at an SH 3 port .28 nitro engine with pull start 28C

Here we take a look at an SH 3 port .28 nitro engine with some light port work.

[@BuzzLytyr]

I don't know maybe you could slip the engine over so we could actually see the whole and see what's going on you know what to look for always sees what you show us maybe you feel better but I'm stopping halfway

[@speedgears1236]

When you moded the sleeve did you see a big difference?

[@NitroTalkwithTodd]

Honestly, not really. Maybe slightly more top with a smaller tuning window.