My little mods on the ZX5 FS

[shannow95]

Hi there,

I'm starting a new topic to show some pics of my new ZX5 FS .
I've changed some (very) little details on it already but more are to come later on . It's no big engineering but anyway I wanted to share .




I've setted her up like RogerM advised me too

The general arrangement :
note that I've use conventionnal car bullet conectors for fast switch between 6.5t and 10.5t motor , works fine doesn't heat at all (yet) . Also the battery holders are inverted it is deliberate (see a few pics below).


The nose after a few bodyshell assembly snaped and was a burden anyway so I cut it off and screw it !


I've setted the chassis on my CNC milling machine to give more clearance for the ESC :


Same with the batteries , they were too wide to fit touched it 1mm will a mill ...


The original pole were the correct height but they only gave 2 in the kit :/ so I've made my own one in brass to give a bit more weight to the lipos .


Just showing them doing their job properly : ( nice fit )


The rear poles have been offsetted to the outside because the clips are too close at this height to the radio plate .
So I inverted the left and right battery holder and drilled the chassis on the same offset but mirrored according to the holders.


More mods will come as thing break down probably lol or if I get fed up with some parts .

[Alex H]

Very nice! I am like you. Also like to improve exciting cars for the better.
Tip for you. You can use team Durango rubber boots on the Lazer if you first take some shrinkwrap around the outdrives. Then simply place the boots on the driveshafts and slide onto the outdrives. Did this yesterday with my RB5 and it works great. Now the diffscrew and dogbone end of the driveshaft are protected from dirt and the lube stays fresh.

[RogerM]

Looking good there. I think you will find that you need a bit more weight in there for LiPo (car seems to need to be at NiMh weight to work ... not supprising as it was designed around the weight distribution with 4200NiMh cells).
I know most people have added around 180g to the car when running LiPo!

I use the same speedo you have there but rotated 90deg. Keep a close eye on the car Lucar style connectors, might well be ok but if not might cause an expensive ESC failure. You seem like a sensible chap (certainly can machine well, good work there!) so I hope I'm not sounding too insulting stating that about the connectors.

2 other little tips

1) put M3x3 (or x5) grub screws in the unused camber link holes on the hubs, just helps reduce flex in the hub and thus helps prevent the used hole going oval and failing.

2) Make up some form of stand-off for the ball stud connected to the servo horn to get the link between the horn and the bellcranks as straight as possible. This really helps the car feel balanced as you move through the range of lock left and right. The car was designed around low profile servos (I think it gives a guide stand off size in the manual but can't remember exactly)

Hope you have lots of fun with the car, just ask if you need help with set-up etc. I'm more than happy to help, especially as the base set-up I gave you was a bit of an estimate.

[shannow95]

Thank you very much

I will do what you advised me to do thanks .

No problem I am a very young teacher in mechanics . I work with kids (17-20years old) in a workshop all day with many CNC and conventional lathes and milling machines . So I am no electrician , electricwise I usualy try and see lol . For the connector I took the biggest I could find they are 5mm diameter I've test the car for a good 10 minutes they didn't get warm or anything and they are very stiff to separate , but I will be carreful next monday where they'll be fully tested for 2hours .

thank you again .

[ace028]

Nice mods! I wish I had a teacher to teach me machining!

Do you think you can make more of those battery strap posts, but with the top flat and slightly shorter to accept the B44 battery thumb screw set screws so you can use the thumb screws? I would be willing to pay for them, LMK.

[Col]

Have you tried running your battery straps upside down?
Gives a better fit with the single strap on the SP.

[RogerM]

Be careful with shell clearence (especially the front posts) if you try to use thumb screws. I've never understood why people think they are an advantage to be honest, the good old R clip has never let me down and is easy enough to instal remove