Yokomo YZ-2 CAL3.1 Build
Discussion
as per roly recommendation I re-gapped the motor / pinion gear to the spur; it's much smoother and quieter now so thanks for that roly.
Unfortunately I only had one shim of the right size (3x6x0.5mm) left in the kit from the build but trialled it and it's spot on for taking up the lateral slack in the hub without causing any binding. Ordered a few off Amazon of the same size.
Can see quite a bit of daylight before fitting the washer! It was loose when it was brand new, I remember checking and re-checking the manual to ensure I hadn't missed another washer but that's how Yokomo want it apparently
and with the washer fitted
Those shims will take out a huge amount of play in the front steering which will hopefully translate to a more positive front end. Whether that will make me any better at an event is yet to be seen! I'm in fear of making too many changes now as I've
moved the battery forward quite notably
given it more gearing
hop'ed up the motor boost / turbo
de-slackened the front end
Might be better, might be underivable again, we will see..
Unfortunately I only had one shim of the right size (3x6x0.5mm) left in the kit from the build but trialled it and it's spot on for taking up the lateral slack in the hub without causing any binding. Ordered a few off Amazon of the same size.
Can see quite a bit of daylight before fitting the washer! It was loose when it was brand new, I remember checking and re-checking the manual to ensure I hadn't missed another washer but that's how Yokomo want it apparently
and with the washer fitted
Those shims will take out a huge amount of play in the front steering which will hopefully translate to a more positive front end. Whether that will make me any better at an event is yet to be seen! I'm in fear of making too many changes now as I've
moved the battery forward quite notably
given it more gearing
hop'ed up the motor boost / turbo
de-slackened the front end
Might be better, might be underivable again, we will see..
yeah that mesh looks a lot better could probably go in a bit more tbh but that should be much less risk of stripping a spur off a jump.
Battery fully forward is fairly common for carpet the faster you attack the corners the more steering and rotation you will want so that should serve you well with more front end.
Have you got plans for the outdoor stuff this year now you seem to have the bug. Swindon is a great facility (lots of grip like outdoor carpet racing) and Mendip as well is a great track and really challenging. Keep your eyes out for regional championships really fun events to enter
Battery fully forward is fairly common for carpet the faster you attack the corners the more steering and rotation you will want so that should serve you well with more front end.
Have you got plans for the outdoor stuff this year now you seem to have the bug. Swindon is a great facility (lots of grip like outdoor carpet racing) and Mendip as well is a great track and really challenging. Keep your eyes out for regional championships really fun events to enter
Cheers guys.
Even closer roly ok will try that, i’ve watched a few vids but the mesh is a little detail i’m still finding my feet with.
Outside is something i haven’t really considered, the main issue is distance, i’m in South Wales so these venues are all quite a distance away. Having a 3 year
old and an oft exasperated OH doesn’t help me swanning off for the day!
Even closer roly ok will try that, i’ve watched a few vids but the mesh is a little detail i’m still finding my feet with.
Outside is something i haven’t really considered, the main issue is distance, i’m in South Wales so these venues are all quite a distance away. Having a 3 year
old and an oft exasperated OH doesn’t help me swanning off for the day!
Will use that as a guide bud cheers.
Well even more potching this evening; I can't believe I keep finding things to do!
Shimmed the hubs up
The front end has much less free play in it now, good stuff.
I also got round to fitting my Protek motor fan; as we've referenced motor temps are likely to be a little higher on the next outing. I found the shell fouled slightly so reamed it out and finished off with my air grinder to give the fan some room as I did with the slipper on the other side
This is where things get a bit s
t. It seems with the fan plugged into channel 4/5/6 of the receiver the ESC glitches when I try and turn it off about 70% of the time. With the fan plugged in the ESC will turn off but then pulse on/off at a frequency of id say about 0.5 second intervals like it can't actually turn itself off. When I pull the fan connection out of the receiver the ESC is finally allowed to die. Any ideas anyone?? That's something id rather not have to live with.
Well even more potching this evening; I can't believe I keep finding things to do!
Shimmed the hubs up
The front end has much less free play in it now, good stuff.
I also got round to fitting my Protek motor fan; as we've referenced motor temps are likely to be a little higher on the next outing. I found the shell fouled slightly so reamed it out and finished off with my air grinder to give the fan some room as I did with the slipper on the other side
This is where things get a bit s
t. It seems with the fan plugged into channel 4/5/6 of the receiver the ESC glitches when I try and turn it off about 70% of the time. With the fan plugged in the ESC will turn off but then pulse on/off at a frequency of id say about 0.5 second intervals like it can't actually turn itself off. When I pull the fan connection out of the receiver the ESC is finally allowed to die. Any ideas anyone?? That's something id rather not have to live with. Is it being affected by the motor magnets, have had fans stop/start depending on motors rotor position. This makes the fan pulse on and off..........otherwise must be an esc setting relating to an external fan.
Does the ESC have a port you can plug your motorfan into bypassing the reciever some of them do...
Does the ESC have a port you can plug your motorfan into bypassing the reciever some of them do...
Could you hotwire the motor fan into the plug/wiring of the ESC fan, which has it's own power port, I assume?
I wouldn't think the power draw of the two fans should be tooooooo much!?
I've never needed to run a motor fan but then I am very slow!!
For anyone looking to join the party, whilst this is the 'Dirt' spec car and outgoing model year; this is a good price: https://www.rccarshop.co.uk/XR320014-XRAY-XB2D-23-...
I wouldn't think the power draw of the two fans should be tooooooo much!?
I've never needed to run a motor fan but then I am very slow!!
For anyone looking to join the party, whilst this is the 'Dirt' spec car and outgoing model year; this is a good price: https://www.rccarshop.co.uk/XR320014-XRAY-XB2D-23-...
Good ideas both. The ESC has a fan port but it's a mini JST? where the Protek fan is standard JST so I can't plug the Protek into the ESC
I've decided to throw money at the problem (not that I have any after fitting new windows / doors & boiler in the house) and have bought a Surpass fan off eBay, only £10 ish and that should eliminate the fan being the issue. Will take it for there but I'd like tap off the ESC directly, can't see an easy way of doing it thought as I'd need a splitter with female mini JST to male JST & male mini JST split. Don't think they make those! What a faff for such a basic item..
I've decided to throw money at the problem (not that I have any after fitting new windows / doors & boiler in the house) and have bought a Surpass fan off eBay, only £10 ish and that should eliminate the fan being the issue. Will take it for there but I'd like tap off the ESC directly, can't see an easy way of doing it thought as I'd need a splitter with female mini JST to male JST & male mini JST split. Don't think they make those! What a faff for such a basic item..
. Seems to be causing you a lot of hassle.update - I've binned it off 
About 30 seconds after I'd ordered the other fan I thought about popping down to Western Valley to (initially) see I they had a fix. Quick call and they were open so down I went. Fortuitously 3 guys all from COBRA / Caldicot were there and we all had a good chat about the issue. Turns out
It's probably the receiver that's the issue..
I shouldn't need a motor fan unless the cars over geared..
I should get rid of the fan and keep and eye that the 27t pinion gear isn't 'too much'..
So that's that, I'll chuck the fan in a draw somewhere and forget about it.
Whilst I was down there I took advantage of Hedleys soldering skills once again and sorted the + wire once and for all. He extended it by about 2 inches and removed the bullet connector; all soldered up nicely so no more short wire issues
So much better!
About 30 seconds after I'd ordered the other fan I thought about popping down to Western Valley to (initially) see I they had a fix. Quick call and they were open so down I went. Fortuitously 3 guys all from COBRA / Caldicot were there and we all had a good chat about the issue. Turns out
It's probably the receiver that's the issue..
I shouldn't need a motor fan unless the cars over geared..
I should get rid of the fan and keep and eye that the 27t pinion gear isn't 'too much'..
So that's that, I'll chuck the fan in a draw somewhere and forget about it.
Whilst I was down there I took advantage of Hedleys soldering skills once again and sorted the + wire once and for all. He extended it by about 2 inches and removed the bullet connector; all soldered up nicely so no more short wire issues
So much better!
1/10th fans... I just bought 8 of these! Turned up the next day!
Think the sale might end today!?
https://hobbyking.com/en_us/turnigy-nano-tech-shor...
Think the sale might end today!?
https://hobbyking.com/en_us/turnigy-nano-tech-shor...
dom9 said:
1/10th fans... I just bought 8 of these! Turned up the next day!
Think the sale might end today!?
https://hobbyking.com/en_us/turnigy-nano-tech-shor...
Interesting. What’s your initial thoughts?Think the sale might end today!?
https://hobbyking.com/en_us/turnigy-nano-tech-shor...
Feels like forever since I update this. mainly because I haven't done anything with the Yokomo in .. forever. A mixture of the OH working most Friday evenings and other commitments means I haven't had a chance to get out. Thankfully a window opened up on Friday night and managed to go racing again at Caldicot.
A great turn out and another evening of really enjoyable racing. Got there around 17:45 and gave a hand setting up the track. The track design was changed early on in the evening as it was a little fiddly in sections; this was a positive improvement as the track got much more flowing and fun.
So got set up next to my mate James, I don't have many pics, just of the pits really.
I started off in the group 7 (G) and had 4 rounds of qualifying and a final. It took a while to get back into the swing of things but soon started getting some consistent laps in around the 15/16 sec mark and dipped into the 14's once or twice which was nice. The change in pinion did liven the buggy up a little and saw more top end with no perceptible loss of torque low down. Moving the battery forward I think improved front end grip, it certainly didn't make anything worse.
During talking in the pits one of the racers next to me informed me that my rear tyres were shot (they looked brand new to me still) so he very kindly leant me a set of rears that he deemed too far gone but that still had more life in them than mine. Despite looking identical to my eyes the difference was noticeable straight away, much more grip in the corners and traction everywhere, I'll be doing the acetone thing / new tyres F+R before the next event.
Between racing and marshalling (which is always more stressful that racing!)
In the final I jumped a few groups and ended up starting 5th in group 5 (E). I completely butchered the start which jangled me a little, I was way down the field and tried to get around as cleanly as possible after the bad start. I managed to make up one place finishing 4th which I'm more than happy with.
Overall a really good night again, plenty of friendly people, only a few furious MARSHALL!! expletives shouted in my direction and of course great racing. Will look forward to the next one and hopefully will have one of the boys on here with his Yokomo joining
A great turn out and another evening of really enjoyable racing. Got there around 17:45 and gave a hand setting up the track. The track design was changed early on in the evening as it was a little fiddly in sections; this was a positive improvement as the track got much more flowing and fun.
So got set up next to my mate James, I don't have many pics, just of the pits really.
I started off in the group 7 (G) and had 4 rounds of qualifying and a final. It took a while to get back into the swing of things but soon started getting some consistent laps in around the 15/16 sec mark and dipped into the 14's once or twice which was nice. The change in pinion did liven the buggy up a little and saw more top end with no perceptible loss of torque low down. Moving the battery forward I think improved front end grip, it certainly didn't make anything worse.
During talking in the pits one of the racers next to me informed me that my rear tyres were shot (they looked brand new to me still
) so he very kindly leant me a set of rears that he deemed too far gone but that still had more life in them than mine. Despite looking identical to my eyes the difference was noticeable straight away, much more grip in the corners and traction everywhere, I'll be doing the acetone thing / new tyres F+R before the next event. Between racing and marshalling (which is always more stressful that racing!)
In the final I jumped a few groups and ended up starting 5th in group 5 (E). I completely butchered the start which jangled me a little, I was way down the field and tried to get around as cleanly as possible after the bad start. I managed to make up one place finishing 4th which I'm more than happy with.
Overall a really good night again, plenty of friendly people, only a few furious MARSHALL!! expletives shouted in my direction and of course great racing. Will look forward to the next one and hopefully will have one of the boys on here with his Yokomo joining
Decided to replace the tyres on the Yokomo ahead of Friday. Friday is a bit of a different day down Caldicot, they're running a practice session from 2-6pm then the normal race event in the evening so thought I'd make an afternoon/evening of it. As the tyres are shot and with short notice I thought I better find the best method to expedite the removal of the tyres from the wheels. I didn't fancy spending around £40 on acetone and the box so thought I'd go the free and instant (15 mins) method of baking the tyres off.
160° for the aforementioned 15 mins and the tyres peeled right off. No damage to the wheels or foams so jobs a good 'un.
have arranged to collect some new tyres (not sure whether to try the low profile fusion fronts as yet) on the day at Caldi so will get those mounted and run them in during the afternoon before the racing starts. Looking forward to have the other PH'er down there with his Yokomo for the evening
160° for the aforementioned 15 mins and the tyres peeled right off. No damage to the wheels or foams so jobs a good 'un.
have arranged to collect some new tyres (not sure whether to try the low profile fusion fronts as yet) on the day at Caldi so will get those mounted and run them in during the afternoon before the racing starts. Looking forward to have the other PH'er down there with his Yokomo for the evening
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