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the old wolfs are not the best for someone who has never used or fitted one before
and as u said sometimes challenging which this is why i would never use an old wolf,
i wired the wolf v550 onto a 1uz race motor and we got it going after awhile so the news one are fine

microtech is piss easy to fit because it comes premade to suit your engine
and the makers of microtech were very very smart as they made a very basic, easy to wire, pre configured ecu which nearly most back yarders can fit, if the old wolfs are that easy ill eat my shorts

if I have fitted 20 wolfs over the past i would know a lot more about them
but for a first timer i would not recommend the old wolfs which were made 15 years ago

the new wolfs are very very good as they can do automatic transmissions

u need to look the ecu as a whole not just as an ecu
fitting is it hard or easy for person tio fit and tune
price how much can u afford
help support which if u don't need who cares but if u get stuck this is the most important tool u can have

wolf has limited help support unless u pay a fee
if someone wants to learn and do it on the cheap go buy yourself a megasquirt
u then need to build it
u then need to learn how to program it
then u need to fix all the tiny problems that will arise

just comes down to how smart u are and how long u want to take to solve the niggly problems and if u pay 300 bucks for an ecu don't go windging when u get stuck with problems