lrp sphere comp

[Richard Lowe]

I think it lasts about a lap in the 4wd before it thermals with bare fets

Tom used to run his Sphere 2007 in his XX4 without the heatsink, it's suprising how much of a difference the little metal sticker makes. Now he has a TC spec (or at least a TC spec heastink + fan) in the XX4 and 2007 + heatsink in 2wd, same as me.

[Ron Burgundy]

Originally Posted by DoughtyUK.net

Ron, you don't 'need' to hold the brake and then go to neutrel when you switch it off.

every single time you even touch the brake it 'updates' the max temperature. this is reset when you turn the speedo on 'normally' next time.

for the record, I run a Sphere TC in my 4WD, but I did swap out the MASSIVE wires to use normal 13AWG wires.

the actual reading for the flashes is as follows

for every flash over 5 its worth 5 degrees away from shutdown.

so if you count 8 flashes, its 3 over 5 so thats 3x5=15 degrees away from shutdown.

Reto would not tell me the shutdown temp but he just said that its 'Freaking Hot'

I get between 13-20+ flashes out of mine, even running 15 minute practise sessions

nice one.........

[Chris Doughty]

Originally Posted by tc2k

Im gonna order an LRP brushless setup this weekend hopefully. The comments about the regular sphere sound worrying, that if it thermals then chuck it. Do they regularly thermal (original sphere) or is it only if you are really stupid and has anyone ever thermalled one and had it work fine afterwards? Kinda offputting

when I got my comp spheres I put my regular sphere in my fast electic boat, this is a super high amp draw environment.

I ran it with a big prop and a 4* motor and it thermaled out on the lake, I had to wait for it to cool down before I brought it back in. once I took the hatch off it was plenty warm in there! I adjusted the prop and it was all running good.

before my new cars arrived from CML I borrowed a B4 to run, I used this speedo in my B4 for a practise day and a full day at CML Raceway without any issues at all. the practise day we were running 10-15 minute runs with a 3* motor.

so basically, I was pretty stupid to thermal it, but it was bloody quick on the water!
and the speedo still ran just fine in the B4 afterwards.

[tc2k]

Thanks Chris, I know who to blame if it does go wrong
One reason im going LRP is the lifetime warranty and the fact theyre easier to replace than the nosram if they do go wrong.

[Chris Doughty]

dont worry, the one I abused is not in a box and on the shelf again

[MK999]

So not only does doughty drive anything on 4 wheels like a crazy man, he does boats too? insane

[tc2k]

Ordered an original LRP Sphere with 6.5 motor this morning. Can anyone tell me whether the speedo comes with the large heatsink and whether it needs a fan, if it comes without a fan, would it be good to run one?

[Ron Burgundy]

Originally Posted by tc2k

Ordered an original LRP Sphere with 6.5 motor this morning. Can anyone tell me whether the speedo comes with the large heatsink and whether it needs a fan, if it comes without a fan, would it be good to run one?

On the original sphere I would run a fan yes, and yes it does come with a heatsink which you should always run...

What mr doughty's gonna say, nah man i ran it in my B4 and it doesnt need a fan! haha

2wd no fan as there is hardly any load on the motor and esc, 4wd off road or TC onroad I would say definitely, huge load on both esc and motor!

[Chris Doughty]

you can never have enough cooling for a brushless speedo.

you will not hurt performance by running the speedo too cool, but you might save a thermal shutdown and finish a run.

at the end of the day, do whatever YOU think you need, always good to be causious when it comes to keeping brushless cool.

[tc2k]

So the Normal Sphere comes with a heatsink, I though it didnt?

Also, what kind of capacitor should I put on it as I heard this is a must for the original sphere

[Chris Doughty]

it comes with a heatsink, but its not the heatsink that can accept the fan on top. (TC style)

put as big a capacitor possible on it, the capacitor smooths out the voltage and allows the speedo to run cool.

[tc2k]

Would a side mounted fan e good as it can blow air OVER the heatsinks and out the back of the shell rather than just onto it?

Also, what size cap e.g. capacity and type would be good.

[Chris Doughty]

yes, side mounted blowing over it would work well, especially in 2WD when you don't have the height.

can't remember the rating, hopefully someone will be able to help out there, I used the 'LRP Small' one when I ran my orig sphere, but it can't hurt to go bigger.

[ben27111973]

Originally Posted by tc2k

Would a side mounted fan e good as it can blow air OVER the heatsinks and out the back of the shell rather than just onto it?

Also, what size cap e.g. capacity and type would be good.

4700uF 10V polarised cap