Brushless CRT.5 race setups.

[FG101C]

Has anyone here raced their CRT.5 with the added weight of the brushless system? If so what are some suspension and diff setups that have been used that seem to work?

I am going to try next time at the track:
3k/3k/1k-Diff's
Medium (blue) springs with the one hole pistons and 60wt shock oil up front, two hole pistons with 50wt shock oil in the rear and medium springs. Front shocks in the number 9 hole & outer arm hole, rear shocks in the 9 hole & outer arm hole.

Mamba I will try 0 drag brake, 60% punch control, normal timing (Fiegao 7l 18t pinion and 2s 5000mah LiPo.

Thanks ahead for any input, just trying to see what other people have come up with that works.

I've been tweaking on my .5 for about 3 weeks now. I've settled in at 2/3/1 on the diff. fluids and my med. spring set is on the way(way too soft in the rear w/grey springs). The only thing on your proposed set-up that looks suspect to me is the front shock settings. With the added rate of the med. springs and the 60wt. oil I would anticipate too much "pack" in the shock opperation with one hole pistons. I do think the one hole piston/60wt oil combination would probably work well with the soft springs but imo the two hole pistons would be a better choice with the med. springs up front.

Although the mamba 5700 I'm running is a bit low on torque, I have'nt played with my mm settings yet. Probably won't until I get the extended chassis from Mike and have the truck tires mounted up, pinion dropped a tooth, and diff fluids increased a bit(probably 3/5/2). I'm currently geared 14/46 and have plenty of top end. I would'nt mind running a L motor but I don't want to go to 3s, or gear up too far to accomidate a lower kv. I like running 13 or lower on the pinion because it allows pinion instalation with the motor out of the mount. Besides, I would need a 5L to keep runnin' what I have.

Good luck with your adjustment; Let us know how it goes..........

[FG101C]

Yea the front is pretty slow reacting with this setup, on the concrete it handles good, haven't been to the track yet. What exactly do you mean by "pack"? would that be when the shocks are'nt absorbing enough quickly enough and the car starts bouncing? Also what is the difference with mounting the shocks in the top set of holes vs. the bottom set?

Just trying to learn all of the different styles of setups and figure out the one that works for me.


Thanks.

Pack is basically the point at which the combination of the piston hole size/# and fluid viscosity no longer allows quick enough shock shaft movement to absorb whatever your hitting; in escence the shock is "locked up" over the smaller bumps and ruts and cannot travel far enough fast enough over larger stuff. On most tracks you want to be using at least 85-90 percent of your available travel to get around quickly.

On shocks, the further you stand em' up the less ressistence they have. The more you lay em' down, the better the car resists roll. The main thing to be weary of on the upper/lower mounting position is that you don't want the suspention to be hanging on the shocks. If you choose to use the upper holes, the droop will have to be raised and you will loose travel which is not horrible on a smooth/blue groove track that does'nt have any brutal obstacles but not wise on rough track with alot of divets, ruts and/or large jumps.

[FG101C]

Thanks for the info, I guess with the one hole setup what I'm trying to help out are the landings off of the jumps, did'nt think about the small stuff needing to be absorbed at a quick rate. What I really need to work on are my landings.

I noticed it says Corpus in you avatar, have you ever been up here in DFW at JCG's track, or Mikes Hobby Shop?

Unfortunately, no. I have planned to attend a couple of events @ JCG but been shut down by work related responsibilities or lack of funds both times. The last time I raced in the Dallas area was mid-later 90's @ Indy RC world. I normally frequent Star Car(our local track), Gears in Harlingen, and Toys 4 big boys in S.A.

[FG101C]

After two days at the track on some really loose stuff, the CRT.5 is hooking very well. If the track had been watered down it would be amazing.

The setup that is working for me is as follows.

Front Shocks: 1 hole pistons, 60wt. oil, medium springs. Ride height level, tower position #10 hole, lower arm inner hole.

Front end: 2 deg. toe out, -2 deg. camber, caster 24. Ackerman #1, upper arm mount #1.

Rear shocks: 2 small hole pistons, 35wt. oil, medium springs. Ride height slightly above level, tower position #10 hole, lower arm inner hole.

Rear end: 3 deg. toe in, -2 deg. camber, 3 degree anti-squat, turnbuckle in c-hub hole #3 and tower hole #2

Wing position: F/2, R/1

Diffs: 3k/3k/1k

Proline Crowdpleaser body

Feigao 7l, 2s 5000mah maxamps lipo, Mamba Max, Spektrum micro pro reciever, Hitec hs-5245mg servo.

Total weight ready to run 4lbs. 11oz.

Hope this helps.