i GUESS gear ratio is necessary to add so:
4:1 ratio. 48 tooth driven 12 tooth driver with 15 inch tires.
i apologize if i'm coming off on the wrong foot or anything bad it's just i'm trying to get the best cam for my setup in case i need to exchange my ordered 275cam monday morning .
let me think..
a gx390 carb i would like to work well with the cam (its on my list but dont want it if it won't benefit)
The block i don't mind clearancing for lift and i suppose i could work with a 36# spring kit only if it is well worth it Even though the cam i chose says for 18pound springs.
i wont hesitate to adjust the engagement speed of the torque converter with a yellow or maybe even a white driver spring.
This is the cam i purchased but am not sure about now:
https://www.OldMiniBikes.com/275-Grind-Welded-Lobe-Clone-Core-Cam.html?category_id=1641 the .275,not the f-275. But like i said, my cam preference is quick with torque and fast rpms to match my gearing. Think of it like getting a car's 0-60 time as quick as possible
and going as fast as you can 0-100mph. metaphorically speaking for a kart of course.