You have to run the diff tight for the big motors. Make sure you use some diff lube on the drive rings just a small amount We use BRP 7460. Run the damper plates as loose as you can and use 100 weight shock fluid on them. The car is hopping because the tires are spinning on the carpet. you need the diff set just right if car is standing still it will have to slip slightly.
The diff space is not in the cat Yet but I will have it on line soon have the LHS ask for them and I can send him some.
AGAIN turn the high end limit down on the speed control so it is like at 3/4 throttle. It will get rid of the wheel spin and the car will still be faster on top end.

Thanks Bud. I did have the throttle EPA turned down to 70% but still had the hop. I even had the hop around the corners with the stock slot car motor. I'll try loosening the diff today and see if that helps it.

Since the tire side diff ring must be glued to the diff spacer, you should include the spacer in the diff rebuild kit.

What is the biggest spur gear you sell for this car? Are their other brands of spur gears that will work with the car?

Biggest spur is 52 tooth thats it.Losi sells one for a buggy or truck that is 55 but you will have to drill diff ball holes in it. Gears are 48pitch american standard. Make sure you have some of the silicone lube on the king pins also. If you don't use thick lube on those two places it is like a real car without shocks.

Car was much better tonight. I loosened up the diff where it would slip about 1/2 to 1 foot with the stock slot car motor from a dead stop. Also, loosened up the dampener plates on the rear pod quite a bit. Almost all the hop was gone and the car was close to gliding through the turns like a big pan car.

Glad it helped make sure You read all the tips on the setup sheet.

Iceman513>> Sorry to hear that!!
Maybe a pinewood would be better.

For anyone interested, here is my review of the BRP after a couple weekends: http://www.one18th.com/forums/showthread.php?t=29040

Just remember Bud, The Iceman said it himself back in post #53. I think it went something like this. " I'm 32, I'm just not that bright".

Don't sweat it Bud.

He gone!! It is one think to complain but to keep it up is another.

That makes the Tekin brushless setup go for an additional $160 a pop in the Ultimate setup.
The setup separately is $150?
http://www.hobbyshopper.com/shop/product.php?productid=16166&cat=253&page=1

Does the Tekin setup need the Big Block pods or does it use the Standard pod set?

The Ultimate kit includes the following:

Includes the following:
Ball bearing front wheels
Ball diff kit
Wide rear tires
Big block rear pod kit
Tekin Rage Hi-Preformance brushless motor and speed control
Hi-performance 6-cell battery pack with battery bars

Your choice of the following:
Blue or orange compound front tires
Wedge or SAL clear lexan body

The Tekin brushless system would be $150.00 more and the Big Block kit would be $30 more. So buying it as part of the Ultimate Racer kit saves $20 over buying those items seperately.