ash2910 Posted May 7, 2022 Share Posted May 7, 2022 Can anyone kindly upload a close up of the pinion gear and spur gear for the DR8 Its my first time replacing the pinion gear (as the original broke) but unsure whether it should be centred, flush or offset left/right to the spur gear Thanks Quote Link to comment Share on other sites More sharing options...
Microspeed Posted May 9, 2022 Share Posted May 9, 2022 We found a use for these redundant mask’s we used to wear: my boy fried his 550 stock brushed motor in his bugsta, to be fair it’s been running a lipo from day one and we gave it a better esc, so it did alright. Already lined up some brushless options, 3660 3100kv or 3650 2700k or 3670 2650kv, 60a and a 80a esc’s and a 25kg servo, so a full upgrade on the cards. I have fitted some new wheels to the DR8, so much grip, did a rolling backflip, full 360, never done that before, so am very happy with these zd racing wheels and tires. They do ballon but I seem to get loads of grip before they give in to 6s power 👹 IMO poss the best mod so far, far better than the 35kg servo that is fitted, that’s really not performing, I’m gonna try a heavier load version, even with the BEC at 8v it’s pants, really not impressed. 2 Quote Link to comment Share on other sites More sharing options...
Pointedscarab Posted May 14, 2022 Share Posted May 14, 2022 On 07/05/2022 at 18:06, ash2910 said: Can anyone kindly upload a close up of the pinion gear and spur gear for the DR8 Its my first time replacing the pinion gear (as the original broke) but unsure whether it should be centred, flush or offset left/right to the spur gear Thanks Mines always ran in the centre 1 Quote Link to comment Share on other sites More sharing options...
tomr Posted May 20, 2022 Share Posted May 20, 2022 Blew the cobwebs off mine this morning Still running fantastic and yet to break anything 👍 3 Quote Link to comment Share on other sites More sharing options...
ash2910 Posted May 26, 2022 Share Posted May 26, 2022 (edited) Replaced the pinion to 14t I dare not going any higher with the stock tyres, they ballooned so much to the point I thought they'll explode! On 6s What are the signs of a failed servo?, noticed it turns ok to the left but to the right there is not much movement Any recommendations for a cheap Chinese alternative? Edited May 26, 2022 by ash2910 Quote Link to comment Share on other sites More sharing options...
tomr Posted May 26, 2022 Share Posted May 26, 2022 These are decent for the price https://www.ebay.co.uk/itm/194991256500 1 Quote Link to comment Share on other sites More sharing options...
ash2910 Posted May 26, 2022 Share Posted May 26, 2022 55 minutes ago, tomr said: These are decent for the price https://www.ebay.co.uk/itm/194991256500 Was thinking to go 35kg to be on the safe side or do you think that's overkill? 1 Quote Link to comment Share on other sites More sharing options...
tomr Posted May 26, 2022 Share Posted May 26, 2022 53 minutes ago, ash2910 said: Was thinking to go 35kg to be on the safe side or do you think that's overkill? Perfect 👍🏻 Quote Link to comment Share on other sites More sharing options...
martin34 Posted May 29, 2022 Share Posted May 29, 2022 Going to give these a try this morning 1 Quote Link to comment Share on other sites More sharing options...
ash2910 Posted May 31, 2022 Share Posted May 31, 2022 Replaced the servo with a 25kg DS3225 but still have the same issue the wheels are hardly turning. I haven't used the car for a while, last used was on grass and I didn't bother cleaning it, could something within the steering/wheels, hub, knuckle etc be seized? Thoughts would be appreciated Quote Link to comment Share on other sites More sharing options...
capri-boy Posted May 31, 2022 Share Posted May 31, 2022 Loving seeing how everyone is getting on with these, it's still on my wanted list but like everything RC atm price rises are a bit silly - used ones seem to fetch almost as much as new. Failing getting hold of one i'm on the lookout for a sensible priced cage to convert one of my many buggies. Quote Link to comment Share on other sites More sharing options...
Kyo Posted May 31, 2022 Share Posted May 31, 2022 1 hour ago, ash2910 said: Replaced the servo with a 25kg DS3225 but still have the same issue the wheels are hardly turning. I haven't used the car for a while, last used was on grass and I didn't bother cleaning it, could something within the steering/wheels, hub, knuckle etc be seized? Thoughts would be appreciated Have you checked the servo saver? Pointedscarab had a similar issue on page 2 of this thread - rebuilt the servo saver and all good. 1 Quote Link to comment Share on other sites More sharing options...
ash2910 Posted May 31, 2022 Share Posted May 31, 2022 1 hour ago, Kyo said: Have you checked the servo saver? Pointedscarab had a similar issue on page 2 of this thread - rebuilt the servo saver and all good. Thanks! Tightened up the silver servo saver nut which has significantly improved the steering, However steering to the right works perfectly fully locks out whereas the left the steering throw isn't as much compared to the right, is this normal? Quote Link to comment Share on other sites More sharing options...
Acidsnow Posted May 31, 2022 Share Posted May 31, 2022 30 minutes ago, ash2910 said: Thanks! Tightened up the silver servo saver nut which has significantly improved the steering, However steering to the right works perfectly fully locks out whereas the left the steering throw isn't as much compared to the right, is this normal? With the servo arm disconnected does it cycle thru its full movement smoothly? Quote Link to comment Share on other sites More sharing options...
ash2910 Posted May 31, 2022 Share Posted May 31, 2022 4 hours ago, Acidsnow said: With the servo arm disconnected does it cycle thru its full movement smoothly? Yep, although I noticed it binds against the front blue mount so I've adjusted it so it doesn't hit the metal but still have the same issue Quote Link to comment Share on other sites More sharing options...
Stormbringer Posted May 31, 2022 Share Posted May 31, 2022 Did it ever work ok ? Quote Link to comment Share on other sites More sharing options...
Kyo Posted May 31, 2022 Share Posted May 31, 2022 I would undo the servo horn and check the mechanism moves freely in both directions, no binding or stiff action. I usually give mine a spray with gt85 after a wet run. Quote Link to comment Share on other sites More sharing options...
martin34 Posted June 1, 2022 Share Posted June 1, 2022 19 hours ago, capri-boy said: Loving seeing how everyone is getting on with these, it's still on my wanted list but like everything RC atm price rises are a bit silly - used ones seem to fetch almost as much as new. Failing getting hold of one i'm on the lookout for a sensible priced cage to convert one of my many buggies. I am still really enjoying mine.With a 16th pinion and these wheels and tyres it's a rocket on 4s.Its basically the only off road car I run now.Parts are super cheap and I agree that people are asking to much secondhand.I have seen some asking more than what I paid for my one new. Quote Link to comment Share on other sites More sharing options...
ash2910 Posted June 1, 2022 Share Posted June 1, 2022 (edited) Spoke to ftx technical support who advised it is normal where the left wheel will not turn as much/fully lockout in comparison to the right wheel. The chap I spoke to said it's quite common not just with ftx models Also I think it's mentioned here or elsewhere the servo saver link/horn at full lock hits the blue motor mount, which also will affect the left wheel from fully locking out Edited June 2, 2022 by ash2910 1 Quote Link to comment Share on other sites More sharing options...
Microspeed Posted June 2, 2022 Share Posted June 2, 2022 Most people who have looked into this issue have either raised the knuckle above the front brace or swapped the arm underneath, so it’s away from everything. I run a 35kg feetech servo and it’s just crap, even on 8v, which I can dial up as I run a max8 esc, I’m going for a eco boost 36kg next and if that fails I’ll try something in the 50kg range. Mines on a 17t pinion and it blew the new tires clean off the rims (ripped the tires open) after the first full speed run, so belted tires are a must, I’m going for the jetko low profile tires from modelsport, just waiting to pay all the bills before I order them. Quote Link to comment Share on other sites More sharing options...
martin34 Posted June 2, 2022 Share Posted June 2, 2022 I still run the stock servo with the arm raised to clear the top plate.I have put a cable tie underneath the servo saver nut to stop it unwinding and coming loose and for what I do with it the steerings fine.My fastrax tyres haven't blown up yet with a 16th pinion but I do have 1 million k fluid in the centre diff. Quote Link to comment Share on other sites More sharing options...
ash2910 Posted June 4, 2022 Share Posted June 4, 2022 (edited) A month out of action as pinion broke, took the car out for a run yesterday with a surpass hobby 14t pinion. Speed runs on gravel and grass was great fun! But the pinion broke again, lost one tooth! Seems if you do high speed runs and braking things break! What brand pinions are people using? anything better out there? Just a headache having to strip it down again to replace the pinion again! Edited June 4, 2022 by ash2910 Quote Link to comment Share on other sites More sharing options...
Redback Posted June 4, 2022 Share Posted June 4, 2022 RW Racing pinions, havent had one fail, that being said, if the tooths breaking off the pinion, atleast its a cheap failure point, the next thing that would go would be the diffs, so maybe easy up on the breaking when ending your speed run. 1 Quote Link to comment Share on other sites More sharing options...
martin34 Posted June 5, 2022 Share Posted June 5, 2022 (edited) I run an arrma pinion in mine and so far so good.fitted this today bit not sure if the cage will hold up. Edited June 5, 2022 by martin34 1 Quote Link to comment Share on other sites More sharing options...
martin34 Posted June 5, 2022 Share Posted June 5, 2022 Beefed it up a bit. 2 Quote Link to comment Share on other sites More sharing options...
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