Originally Posted by michael 1

a lot has been said over the last few years about motor mods
what i have found to be true most of the time is the stock motors for the most part are very good. When people start to change the duration and
timeing of a motor it will use more fuel and become harder to tune.
yes it can make more power in some cases but not always, there are a
few people that understand what these mods do, simply just grinding away
to look like work has been done will be a hit and miss in terms of gains
any time the crank is dremeled or machined to open the intake it will
alter the timeing and duration and the balance, same with the sleave
as far as i know only muran and jp check balance. for most people
a pipe and header and getting clutch and gearing right for the track that they are at will give them the best gains