Brake Specific Fuel Consumption Ratio

Love these videos!

It's all about tuning.

Thank you, your knowledge, so tired of uninformed shade tree mechanics with trap music in the background showing there backyard tactics where everyone is now stupider for having watched that, im curious where you have learned this? I've been a heavy duty diesel mechanic for decades with a tech school background and I have not herd some of this info.
thanks again,