LRP Sphere comp 2007 problems!!

[chris68nufc]

I have got 2 of these systems and i am yet to be concinced if they are going to be better/less hassle than my original brushed stuff.
I have already sent 1 of the systems back to Apex to see if they can find a fault with it and my remaining 1 in my 4WD glitches at low speeds.Im running a 4.5 Sintered and although it seems very quick it feels very glitchy at low speeds.
At Bury Metro recently Dan Greenwood(Thanks again) loaned me his Novak 7.5 motor in my 2WD and this seemed very good.It was smooth and quite quick.
Has anybody else had problems with their LRP 2007 systems and could anybody offer advice to stop the glitching at low speeds.Thanks.Chris.

[ben27111973]

what radio/rx and servo are you using?

my bet is the one you sent back is fine. no issue with it at all.

I have had many issues because the BEC is not strong enough to deal with Spektrum, KO digital servo and a PT along with a hot brushed or LRP only BL motor. No issue with the new orion BL motor or the novak BL motor

Glitching at low speed and no response under full throttle.

There are a number of fixes.

On my TC edition I have added an extra power cap to the spare rx port and this solved the problem.

On the 2007 in my 2WD I have run the blue fet wire to the +ve on a spare slot on the rx to solve the glitching.

alternatively change to JR or Airtronics servo and this solves the problem too.

If you are using a different setup to mine then I cant really comment but I would go with another power cap first.

It seems that the LRP motors draw just a bit more current than the Orion BL or Novak BL I have tried and the power cap solved the problem.

Another twisted way I was going to fix it was to go back to my KO FM module as I have no issues at all with that installed

Ben

[hickston]

Originally Posted by ben27111973

On my TC edition I have added an extra power cap to the spare rx port and this solved the problem.
Ben

Same problem here too, fitted SPM1600 (power cap) and it works fine

[Chris Doughty]

Hi Chris,

the 4.5 sintered motor is a very 'hot' motor for off-road, its a very aggressive motor. its also using the very 'snatchy' sintered rotor.

the 7.5 will always be a lot smoother and will 'crawl' away from a stop much smoother, but on the flipside will be a slower motor with less torque.

could you give details of what motors you are running in which cars and on what gearings etc...

[Big E]

I have suffered this a lot recently since putting a new servo in. Lots of cuts when you just picked the throttle up from the corner. I was running the small spektrum receiver which is supposed to be the best for not having this problem and 2 capacitors in parrallel to add there capacitance so more voltage stored but it still done it.

Changed back to my old 40Mhz receiver and it all cleared.

Basically if you run spektrum it shuts off too easily when everything loads the speedo's bec up and then spektrum goes in to shut down for a split second.

E.

[super__dan]

We also played with this and a brushed motor on same speedo and it wasn't right, the throttle curve was just really wrong. Limited resolution and it took off like a scalded cat at half stick. The 7.5 motor may have helped mask the problem but maybe not solve it

Defo not tranny issues as we checked all that.

[chris68nufc]

Originally Posted by DoughtyUK.net

Hi Chris,

the 4.5 sintered motor is a very 'hot' motor for off-road, its a very aggressive motor. its also using the very 'snatchy' sintered rotor.

the 7.5 will always be a lot smoother and will 'crawl' away from a stop much smoother, but on the flipside will be a slower motor with less torque.

could you give details of what motors you are running in which cars and on what gearings etc...

I am running a kit spur,84 i think? and a 16 pinion which gives a final drive ratio of 12.07. Richard Lowe suggested my batteries could do with being renewed. They are about a year old and are 4200 unmatched cells. What do you think? Maybe i should go for a lesser load motor?

[super__dan]

I don't think it was that, I thought there was defo something wrong