Rear End Break in Period, Rear End Break in Period Options

[BrianChevy]

Dear Fbody friends,
I just picked up my racecar from the shop here in Atlanta, they did a GREAT job and put the whole rear end back together for me with the NEW posi unit that I bought here on the board from LS1RAFTRACER.

They suggested that I give the rear end 200 miles to 'break in the new bearings' and seals. So.. My car is NOT street legal, i'm curious HOW DO I DO THAT?

Seriously, I asked these guys at the shop and they said it needed AT A MINIMUM 2 HEAT CYCLES to completely get the break in period.

So, do I run the next 2 events in Atlanta Solo2 at 'street pace'? OR drive around the neighborhood 200 times?

do you have any other ideas? OR do you think they are being silly. I am worried about the gears seating properly so I guess I'm listening to the guys that know. What do you guys in the know think?

Brian

[prockbp]

break the law baby!

[rmackintosh]

...try this on a car that is so far from street legal it is a joke....

I just drove it around the block a few times....did a session of practice at VERY conservative pace....and RAN THE THING!

(IMG:http://www.frrax.com/rrforum/style_emoticons/default/biggrin.gif)

You could try and sign up for a HPDE event near you and run with the street cars at a conservative pace....

[SuperCricket]

I drove the 2 miles from the shop in mine after they put the rear end back together, got it sideways pulling into my driveway leaving some 315 wide black marks, and decided that was a qualified break-in for it. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/biggrin.gif)

Many will tell you this is wrong. (IMG:http://www.frrax.com/rrforum/style_emoticons/default/beerchug.gif)

[SVTHuh]

Go rent a dyno for an hour.. Run it at 60mph for 15-20 mins, then let it cool down and then run it at 80 or so MPH for another 15-20 mins, let it cool down and you should be fine.. Basically what I did with mine, but I was on a freeway for a total of probably 100miles, then I let loose and beat the bag out of it.. Still in great shape! But now the motor is blown (IMG:http://www.frrax.com/rrforum/style_emoticons/default/blink.gif)

[CMC #37]

I usually get some track time and drive 6/10s for three or so sessions, then get up to speed on the last one gradually and heat the thing up. Then pack it in; ready for racin' next event! Having it on the dyno is not the same, we did that with one rear end that grenaded on my first slow lap around the track!

[NataSS Inc]

Get some jack stands and lift the rear off the ground. Chalk the front tires as best possible. Run the car at speed 60-90 until you build heat in the rear end.

I know its not the safest thing to do, but good stands and good chalks will minimize chances of a problem.

One of my buddies had to do this to track down a vibration he had in the driveline at 200mph. Since you cant get out on the highways and run 200mph until the road is closed for an event it makes it tough to do. He used the above method and one of his crew went UNDER THE CAR (IMG:http://www.frrax.com/rrforum/style_emoticons/default/blink.gif) with everything spinning at 200mph (IMG:http://www.frrax.com/rrforum/style_emoticons/default/blink.gif) (IMG:http://www.frrax.com/rrforum/style_emoticons/default/blink.gif) . They were able to find the problem and fix it. Not the brightest thing in the world but it worked. At 60-90 it wont be bad at all. LG does it quite often in the pits prior to taking it on the track just to check everything out.