The Canaries manager took in United's midweek Champions League clash against Basle, when the hosts threw away a 2-0 half-time lead and only scrapped a draw with a last-minute goal from Ashley Young.
Despite United's less-than-impressive defensive display, Lambert knows full well the magnitude of the challenge which awaits his promoted side on Saturday - with strike duo Wayne Rooney and Javier Hernandez set to comeback into the Red Devils' attack.
"Some teams are beaten before they even go there, but I will have my own way to deal with that," Lambert said.
"We have to go there with a belief, because if you don't you can get turned over.
"Hopefully you will have a game plan which will try to hurt them, but that can be blown out of the water within minutes.
"You have got to respect what you are up against, you cannot go gung-ho because they will pick you off all over the place.
"You have got to play with your brain a bit and hopefully that is what we will do."
Lambert is in no doubt Ferguson is the "best manager around" having continued to keep United at the top of English and European football during his long tenure.
"It is probably the hardest game you will get, but we have earned the right to play them, and if you don't like playing a game like this, then there is something wrong," said Lambert, who has guided the Canaries up from npower League One in successive seasons.
"I won't need to lift them because the atmosphere and the players they are going to be against will do that for them.
"We will give it a right good go and there have been better teams than us who have gone there and got right turned over, which shows you the magnitude of what we have to face.
"Sometimes upsets can happen and we will try everything we can to win."
Norwich will again be well supported on their travels tomorrow, with some 3,000 fans expected to make what for many will be the best part of a 10-hour cross-country round-trip.
The Canaries recorded a first away win at Bolton last weekend, which they followed up by beating Sunderland 2-1 at Carrow Road on Monday night.
Most of the away supporters will be making the journey to Old Trafford more in hope than genuine expectation.
Lambert, though, insists his squad must give a good account of themselves on the pitch.
"I hear all the time it is a great day out, but it is only great if you are doing all right, not if you are getting smacked six or seven nothing," he said.
"I don't buy into it is a lovely day out for the supporters.
"It is only if you are giving a right good go at it."
Striker James Vaughan is set for an extended spell on the sidelines after damaging knee ligaments against Sunderland.
Having just returned from a pre-season injury on his other knee, Lambert feels for the summer signing from Everton.
"James is going to be out for a considerable time which is a blow because I thought he was looking really good," the Norwich manager said.
"It is a pity for himself because he had worked hard to get back."