XRAY - Model racing cars

What are you hitting? I would suggest going to a diff with 300,000 diff fluid. Like a spool, but forgiving when you slam into a wall.

it's not the diff that requires oil it's the solid spool. and honestly im not hitting more like tapping lightly it's so weird.

George,

I think James is suggesting to use the stock diff with heavy fluid as it will be more forgiving while you are still improving your consistency and cleaning up your laps. If you are 'tapping' boards pretty frequently, a solid axle is going to be harder on all of the parts in the drivetrain: axles, dogbones, belts, pulleys, etc. The diff can help absorb some of the shock from the impacts with the boards. This is true in electric sedans and in nitro sedans.

Bryan
RC America

If i use the diff what would be the advantage or dissadvantage from using a solid diff? and if i use the block to lock the diff will it help?

George,

I am not a racer, so others with some more hands on experience can provide some better details, but the solid axle should have some benefits and drawbacks compared to the diff. It can be a trade off between on power steering and acceleration vs off power steering. I know that Ralph has always said that the solid axle requires a more aggressive use of the brakes in order to get the car into the corner, without using brakes the car will push.

There are still some tracks where the team has preferred the stock diff, so the lightweight spool isn't necessarily the best for every track. You will need to find out which setup you are more comfortable with. Your posts about the steering blocks and drive shafts seems to indicate that you are still spending some time in the boards . Your issues with these components are not common for NT1 customers, so there is something else going on. XRAY's parts will compare to any car's durability. I am wondering if there is something bound up in your suspension to cause the frequent damage. I have seen some NT1's absolutely beat down the track walls and drive away, so something else is causing your issues. I think I saw that James was going to be at your track to take a look at your car. Hopefully he can watch you on the track and give you some setup tips to tune your car to your driving style and track. If something is up with the build of the front end, he will probably be able to identify it.

Using the locking block in the stock diff may have a bit more 'give' than the lightweight spool, but it will still be harder on the drivetrain than the standard gear diff.

Bryan

I'll try the diff this weekend. I'll also look for James and let him take a look at the car. I looked it over very carefully and the suspension isn't binding i'm sure. But hey i'll let him take a look. It doesnt hurt to try. The pivot ball pop right out of the steering block's I just ordered another couple of set's hopefully i wont need to use them at the homestead track. we'll see. But thank's for the info and i will be running the car. hopefully i get a win. I just hope it doesn't break again and the diff actually helps. What is the hard bumper 4? I just purchased it and i tryed it this weekend and it I broke to steering block's. isn't the hard bumper for hard boards
? and if it's so hard does it affect anything else. Do you think i should go back to the stock bumper?

The hard bumper holds it shape better than the stock bumper and also adds weight to the front end of the car for more steering. You'll see that if you hit the boards a lot with the stock foam it begins to lose it's shape and sometimes even break apart...