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Old 2009.08.26, 02:22 AM   #76
color01
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Turned my clean electronics install completely upside down... here's a Tekin B1R and a prototype 2.4GHz receiver I got from a friend, mashed onto the MRCG1.1's generous electronics plate.



The setup is so ugly because I need to keep the receiver un-soldered... but it'll hold up well enough for racing 1/28's. There are two lights on the Rx though, so combined with the Tekin's built-in KITT bar (6 LEDs! lol...) my new electronics basically light up my car like a Xmas tree.



I'll be bringing this to the track tomorrow, but here are some bench videos.

Steering and throttle test:



The KITT Bar I dunno about you guys but this thing is terribly amusing to me, and so much cooler than the one-LED interfaces on other ESC's.

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Old 2009.10.31, 08:30 AM   #77
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What's up?

Hi Brian, This thread sure has been quiet. I'm just wondering what super secret project u r working on.
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Old 2009.10.31, 02:34 PM   #78
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It's not such a big secret-- I'm trying to retrofit either the 02 or 03 servo into the MRCG/MRCG1.1's front end. It seems that no hobby-grade servo is fast enough to match the ASF 02's servo speed, so to keep up with the new 03, we need to stuff a Mini-Z servo into the car.

Much easier said than done though, which is why I haven't made much progress.
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Old 2009.10.31, 05:15 PM   #79
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Quote:
Originally Posted by color01 View Post
It's not such a big secret-- I'm trying to retrofit either the 02 or 03 servo into the MRCG/MRCG1.1's front end. It seems that no hobby-grade servo is fast enough to match the ASF 02's servo speed, so to keep up with the new 03, we need to stuff a Mini-Z servo into the car.

Much easier said than done though, which is why I haven't made much progress.
Good luck. Hope you can git ur dun!
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Old 2009.10.31, 07:00 PM   #80
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Just by hap-stance I checked this thread out again, and I finally saw the "new" MRCG 1.1 you built color0, with the Tekin B1R and proprietary 2.4ghz Rx. This is the coolest setup yet IMHO...
Ever since Dave G. mentioned in one of his posts how he liked the horsepower of the Tekin B1R ESC, I have been wanting one. Add the fact it has those KITT lights.... Hotness right thurrr.
I like the vids too color0 - I would love to see more.

Awesome car!!!
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Old 2009.12.17, 01:12 AM   #81
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As the year rolls to an end, I unfortunately have yet to make any real progress on stuffing the MR03 servo into the MRCG front end... but, I still gotta prepare for the Tekin 1/28 Nationals this coming January so there's work to be done.

I found out that my old Futaba S3114 servo was nice and broken (notchy, grinding and all that jazz), no wonder why I couldn't get the car to handle since the summer. So that's replaced with a fresh one, and voila, I've got steering response almost on par with the MR02's (still a little slower, wondering if some ICS tuning will fix that). This episode tells me that I could really use a metal-geared servo, since the small-Futaba servo splines don't fit any servo saver I've found...

There's a freshly rebuilt diff in there with the new PN V2 spurs, and I actually used proper diff grease this time! The new diff is smooth as butter and light to boot. There's a little bit more limited-slip effect even without the V2 spurs in action though, I think this is due to the grease (I used to use disk damper oil in my diffs, much thinner stuff it is).

Also, I raided my PN dual-spring shock for some new springs for the MRCG1.1... the rebound spring is the perfect replacement for the MRCG1.1's center spring, and the compression springs (I picked the yellow one) are a perfect fit on on the ball end, as long as you shorten them a few mm (I cut off 1 coil and then bent the wire to recreate the flat part). The new spring combo gives the car some much needed bump stiffness, which should translate to better corner exit traction in concert with the new diff.

Front suspension is the same as always (unfortunately no MRCG WTF yet), just one more shim on each spring cup to achieve exactly 0 droop and 0 preload. Letting the front end of the MRCG roll more than the rear isn't a great idea, as the rear end is pretty stiff in the roll department.

All the minor tweaks add up to one smooth-driving MRCG:



The rest of the preparations include trimming and washing the body, and putting together a few new battery packs for the race:



The trouble with this preparation, though, is that I can't actually make the race. So Binh and I have arranged for a "designated racer" to campaign this MRCG1.1 for me. To that end, I don't really know what the hot setup for this car will be (heck, I haven't been to Inside Line Racing since the summer), so I'm just setting it up with a "best guess" config and leaving the rest to him. We'll see what happens!
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Old 2009.12.17, 02:32 AM   #82
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Really nice and clean set-up you've got there Brian, as always...to bad you can't make the race....goodluck to whoever will drive this Black beauty

Do you know, this will be the only one non Kyosho platform in the race ?
I've read that the Proto chasiss will make the race but that it's pretty much Kyosho based. I'm thinking of P'28, Sinister, Razr or other prototipes...
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Old 2010.02.14, 12:21 PM   #83
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Shortened Dual-Spring Shock Spring

Brian, I am unclear about how much to remove from the spring. How long was it when you were done? About as long as a regular PN MR02 front spring? Thanks.
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Old 2010.02.15, 02:45 AM   #84
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No, it's closer to being an MR03 front spring in length; you can pretty much do the same thing I did, cut off one full coil, and then bend the end of the spring to make it flat. It should take between 2-3mm off the original length.
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Old 2010.02.15, 03:48 AM   #85
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Thanks Brian. I'll try that.
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