Not Ranked
As has been said one issue is the wrong cam for street use, which is very subjective. However, you will find that in the US a very common mistake is picking the wrong cam with the wrong transmission, and wrong differential gears. It's all in the math!!!
Guys will spend a small fortune on pimping the car out but will miss this critical element of it's design. It has been a consistent issue in the US since the 60s. Usually by guys that have more money than experience of mechanical training, but not always. HP sells but most guys never ask what rpm range does an engine produce that HP. It's often in a range you are not in very often or maybe not the skills to drive in. I swear there is a formula somewhere that figures the cost of high HP vs. longevity, and the cost per mile of use goes really high the higher HP goes. Mostly, the higher the engine spins the sooner it breaks. For the street the trick is to find the balance.
__________________
Wayne
"Everything is alive. If you get angry at a vehicle or the trans, it won't fix until you apologize and say you are sorry." "The vehicle always knows what it is doing and what the cause of it's bad feeling is. If you ask it humbly what the problem is, it will tell you. Then you and it will both be happy."
Gil Younger
|