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Associated RC 12 R5.2

Old 01-06-2016, 02:28 PM
  #781  
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I made good progress on my build today.

1) Sliced off the horizontal mount tabs on the Futaba S9650 servo. I wanted to use the kit supplied mounts. Came out very clean (can't post pics yet due to post count). While assembling the tie rods one of the turnbuckle eyelets split on me Ordered some, along with some other spare parts!

2) Gears,wire,tires and some misc. parts due in tomorrow from TQR and CRC.

Next purchase will be an ESC and some batteries...
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Old 01-06-2016, 04:46 PM
  #782  
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Originally Posted by NomadRacer View Post
I made good progress on my build today.

1) Sliced off the horizontal mount tabs on the Futaba S9650 servo. I wanted to use the kit supplied mounts. Came out very clean (can't post pics yet due to post count). While assembling the tie rods one of the turnbuckle eyelets split on me Ordered some, along with some other spare parts!

2) Gears,wire,tires and some misc. parts due in tomorrow from TQR and CRC.

Next purchase will be an ESC and some batteries...
Yes, the same happened to me with the rod ends. I just binned those and used TN racing rod rends.
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Old 01-06-2016, 04:47 PM
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Originally Posted by Robbob View Post
We use the 5.1 brace when we added the shims.
http://www.tqrcracing.com/shop/produ...w.asp?p_id=186

OR you could use the VBC ones that come in different lengths.
Thanks for the heads up! I will order one of those braces in the near future.
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Old 01-06-2016, 05:12 PM
  #784  
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Originally Posted by Robbob View Post
Question on the Xenon steering blocks - I have the 1-2-3* ones but don't understand two things.

First is it caster or camber they change ...... how do they go in? The instructions show drawn pictures but not really clear on what way the number gos in each one.

Also what is the benefit from running them over stock?


Other question on side springs ...... what would I gain from going to black (softer) side springs over the Olive ones Associated makes?


Thanks for the help.
It changes camber. If I remember right, running different inserts will make the cars camber flatten out while in the corner. This is all dependent on how much static camber and insert you are using. For example, if you run a 0 deg block with -1.5 camber and with the wheels turned there will be a noticeable angle of the inside edge of the wheel going to the outside edge. Whereas if you run the same camber with insert #2 this will flatten out the angle. This camber change only occurs when you're steering into a corner. I haven't tested this out on the track, but it should make the car easier to drive in the corners, maybe?

As for the instructions, I hear ya. I too had issues with it. You'll have to test it out and let us know.

Side springs.

Simply put -Softer will make the car have more rear traction.
-Hard will make the car have less rear traction.

You'll notice these side spring changes when going on to high speed sweepers and chicanes. If you find the car is under-steering then increase the the side spring rate, if the car is over-steering then decrease the side spring rate.

Keep in mind these sides springs might change due to your tire compound choices.
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Old 01-07-2016, 04:34 AM
  #785  
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Originally Posted by EDWARD2003 View Post
It changes camber. If I remember right, running different inserts will make the cars camber flatten out while in the corner. This is all dependent on how much static camber and insert you are using. For example, if you run a 0 deg block with -1.5 camber and with the wheels turned there will be a noticeable angle of the inside edge of the wheel going to the outside edge. Whereas if you run the same camber with insert #2 this will flatten out the angle. This camber change only occurs when you're steering into a corner. I haven't tested this out on the track, but it should make the car easier to drive in the corners, maybe?

As for the instructions, I hear ya. I too had issues with it. You'll have to test it out and let us know.

Side springs.

Simply put -Softer will make the car have more rear traction.
-Hard will make the car have less rear traction.

You'll notice these side spring changes when going on to high speed sweepers and chicanes. If you find the car is under-steering then increase the the side spring rate, if the car is over-steering then decrease the side spring rate.

Keep in mind these sides springs might change due to your tire compound choices.

Appreciate all that!
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Old 01-07-2016, 07:44 AM
  #786  
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Originally Posted by Robbob View Post
Question on the Xenon steering blocks - I have the 1-2-3* ones but don't understand two things.

First is it caster or camber they change ...... how do they go in? The instructions show drawn pictures but not really clear on what way the number gos in each one.

Also what is the benefit from running them over stock?
Originally Posted by EDWARD2003 View Post
It changes camber. If I remember right, running different inserts will make the cars camber flatten out while in the corner. This is all dependent on how much static camber and insert you are using. For example, if you run a 0 deg block with -1.5 camber and with the wheels turned there will be a noticeable angle of the inside edge of the wheel going to the outside edge. Whereas if you run the same camber with insert #2 this will flatten out the angle. This camber change only occurs when you're steering into a corner. I haven't tested this out on the track, but it should make the car easier to drive in the corners, maybe?
The Xenon steering blocks change kingpin inclination, which impacts a number of things - including camber gain and scrub radius. I would recommend doing a google search on kingpin inclination (or angle), as many of the references for full-scale racing will do a better job of explaining KPI than I can. The new Serpent car has blocks with KPI inserts as well.
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Old 01-07-2016, 08:46 AM
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Originally Posted by LloydLoar View Post
The Xenon steering blocks change kingpin inclination, which impacts a number of things - including camber gain and scrub radius. I would recommend doing a google search on kingpin inclination (or angle), as many of the references for full-scale racing will do a better job of explaining KPI than I can. The new Serpent car has blocks with KPI inserts as well.

Brewing the coffee when I get home lol ....... plenty to read on this.

Thanks.
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Old 01-07-2016, 04:18 PM
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Originally Posted by LloydLoar View Post
The Xenon steering blocks change kingpin inclination, which impacts a number of things - including camber gain and scrub radius. I would recommend doing a google search on kingpin inclination (or angle), as many of the references for full-scale racing will do a better job of explaining KPI than I can. The new Serpent car has blocks with KPI inserts as well.
Thank you for clarifying this
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Old 01-09-2016, 10:46 AM
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Finally... 15+ posts!

This is my 12R5.2 as it rolls today. Short funds right now till the end of the month.

Futaba S9650 servo with horizontal tabs sliced off.

Lunsford titanium brushless motor screw (top only).

View on Protoform car stand.
Attached Thumbnails Associated RC 12 R5.2-12r5.2c.jpg   Associated RC 12 R5.2-12r5.2b.jpg   Associated RC 12 R5.2-12r5.2a.jpg  
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Old 01-09-2016, 01:00 PM
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Originally Posted by NomadRacer View Post
Finally... 15+ posts!

This is my 12R5.2 as it rolls today. Short funds right now till the end of the month.

Futaba S9650 servo with horizontal tabs sliced off.

Lunsford titanium brushless motor screw (top only).

View on Protoform car stand.
To paraphrase Brody from Jaws...

"You're gonna need a bigger pinion"
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Old 01-09-2016, 01:56 PM
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Bigger pinion.... yes! I got that 24 tooth before understanding all about gearing the car. I think I know what I need but always looking for suggestions/tips.
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Old 01-09-2016, 02:28 PM
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Originally Posted by NomadRacer View Post
Bigger pinion.... yes! I got that 24 tooth before understanding all about gearing the car. I think I know what I need but always looking for suggestions/tips.
You probably want to be in the area of 100 rollout. Under would be okay, but I wouldn't go over it much.

Since tire diameters change, it's hard to say "use XX/XX gearing". But there are calculators for that and I know there are some spreadsheet charts online as well.

Here is the calculator I usually use: http://store.ontrackrc.com/index.php...page=page&id=3
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Old 01-11-2016, 05:15 AM
  #793  
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Anybody using the Slapmaster #109 Thrust Kit on the diff?
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Old 01-11-2016, 06:09 AM
  #794  
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Check out my YouTube channel for some interesting modifications to the 12R5.2 chassis.

Video of my 12R5.2 which you can do as well! Cheap and easy!
https://www.youtube.com/watch?v=I1IOctQ_CSk

It's about the differential. Get the Slapmaster thrust kit!

https://www.youtube.com/watch?v=uu99...m-upload_owner
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Old 01-11-2016, 07:18 AM
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Thank you kindly for the video links.

I polished the king pins but still feel a binding so ordered a 1/8" dia. reamer to do the steering blocks. Should I also ream the pivot balls?

Will definitely go for the Slapmaster kit!
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