Predator XRS

[tobbe]

Edit: Fast shipping! Thank you TeamXtreme!

[Mrs.TeamXtreme]

Hi Tobbee

I have got into the system and checked. Your order was sent out beginning of this week. It should have automatically updated. I have done it manually. But your order was definitely sent early this week!

[tobbe]

OK glad to hear that. Hope it'll arrive soon, thanks

[tobbe]

Wow! Guess what I found in the mailbox when I came home? My Predator parts! Thank you TeamXtreme! And I apologize for my last message of critisizing you.


I began to build it immediately, but now I've some problems with the diff. It loosen itself up! No matter how I adjust it it will loosen up! Should I put some threadlock on the diff screw so it won't loosen anymore?

Edit: I found the problem. The former owner had locked the diff by gluing the thrust plates together. So when I now tried to rebuild the diff there were some glue inside the outdrive that prevented the thrust bearing to rotate. So now the diff is working again

[mattym0310]

Yeah, put some thread lock on the diff screw. That's what I do in my x11

[tobbe]

Now it's finished! I love it. Still need some nice tires.

[tobbe]

Got some tires today (Proline Holeshot), glued them to the wheels and went out for a test drive. I just have to say Wow! The handling was superb! It also turned really well, but not perfect, it's the servos fault because I use a standard cheap Hitec servo...But I will order a better one soon.

But after about 3-4 mins. the ESC shut down because of over-heating, the motor was also really hot (I couldn't keep my finger on the motor for longer than 3 sec.)! I use a bonded Novak 6.5R motor and a 17 pinion and stock spur. I didn't use the body at all because it's really tight to get everything to fit under it. I'm pretty sure the gearing is wrong but I didn't had any smaller pinions at home. So what gearing do you use in your Preds?

Oh and btw, I ordered a sintered rotor today to see if I can get the temps lower.

[Northy]

Fit the sintered rotor and a 16 tooth pinion and try that.
I used to run a 15 on a 5.5.

G

[Lowie]

Just checked the XRS-manual.
I found this picture on page 4, explaining how to mount the diff.



When looking into the X10-manual, it's clear that they used the same pictures, but this time added the necessary comment that you need to use threadlock.



I also use a trick a friend and pred-owner learned me: tune the diff, and then add a little drop of CA-glue to secure it.

[Lee]

Is your friend Bmag?

[Tom3012]

Yup, threadlock the diffs, you can still adjust them, just makes them less likely to loosen up....

In my X11 I run a nosram 6.5 and with the 72 kit spur a 19 pinion, its never shut down due to temperature, and never gets worryingly hot..

Hope this helps...

Tom

[tobbe]

Thanks Lowie, but the reason why it loosen itself up was because there were some glue in the outdrive that prevented the thrust bearing to rotate, so when i tried to rotate the diff then the screw instead rotated and got loose. But now it's fixed and it still very smooth and tight after few runs.


Tom3012: How hot does your motor get? Has the motor a sintered rotor? Mine gets really really hot even without the body. But as I said before, a sintered rotor is on the way so I hope it'll fix the problem

[jeff jenkins]

its all about gearing if you have the wrong gearing right now then putting in a different rotor will nt make a difference.. go down a few teeth on the pinion.

[Tom3012]

Just call me tom! lol...

It very rarely gets untouchable hot... only if its a really warm day and im driving like a looney! a its just a standard bonded rotor... cant think as to why yours is getting so hot though, is your slipper really tight/loose?

Tom

[Northy]

What tyres are you running? Big high profile dirt tyres will alter the overall gearing.

G

[tobbe]

Jeff: Yeah you are probably right. I've ordered some smaller pinions to try with to see if it helps.

Tom (): The slipper is as the manual says. And I can hear a little slip when I accelerate. So I think it's OK.

Northy: Proline Holeshots front and rear.

[Tom3012]

lol... im running out of ideas!! erm, only thing is as northy says about the tires then im stuck for reasons... maybe settings on your speedo?

[tobbe]

Got the sintered rotor today. Installed it and went out for a test run. Holy smokes what a difference! Before it didn't seem to have any brakes at all. Now I got too much brakes, and the acceleration was a lot better than before. And guess what. The motor temp is now cold! I didn't checked the temp. but I would guess it was around 30 degrees Celsius and I run in long grass! Before it was about 70-80 degrees Celsius or more all the time. What a difference.

[Thomas P]

If you using the same gearing, i understand it is cooler. the point and advantage with the Sintred rotors is, torque and you can gear it 1-3 T harder.. then you will see,the temp will go up again .

[tobbe]

Yep, but I'll keep it as it is now. Lots of torque and great acceleration.