03-31-2012, 08:55 PM | #1 |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Szczerba's 2012.2 Secret Agent'd 3.5 Bodiless Berg
Picked up a Y-Town 3.5 Secret Agent. Here: http://www.rccrawler.com/forum/chass...%2A%2A%2A.html I have been running the Secret Agent 4.0 with great success on berg axles. I finally got the rig crawling really smooth and then Y-Town released the 3.5 Bodiless. I usually run a chassis for about a year then switch. Could't pass up the 3.5 after running the 4.0. My 4.0 setup was here and was around 5lbs 4oz as of yesterday. Szczerba's 2012 Secret Agent'd 4.0 Berg 4.0 with body ~6.2oz 3.5 bodiless with all the gear ~4.9oz |
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03-31-2012, 09:00 PM | #2 |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Links from the 4.0 were a direct swap to the 3.5. Some slight tweaks on the front uppers may be at hand. Might need to shorten them a mm or two. Front Uppers: Straight Links- 75mm (unthreaded distance) Bent eye to eye: 109mm (Revo-Revo) Front Lowers: Straight Links- 75mm (unthreaded distance) Bent eye to eye: 115mm (Jato-Revo) Rear Uppers: Straight Links- 105mm (unthreaded distance) Bent eye to eye: 144mm (Jato-Revo) Rear Lowers: Straight Links- 115mm (unthreaded distance) Bent eye to eye: 140mm (Revo-Revo) Normal comp berg axles. CCD tubes with CCD steering, front 300 axle shafts, rear RC Axle Master axle shafts, drilled ligtened gears. Stock locker out back. RcBro's locker up front. Holmes Hobbies TorqueMaster Pro Handwound 540 Brushed motor with 12 tooth pinions. Helhedded fabbed up a steering link several months ago for me. Beefy servo. Vanquish steering knuckles with STRC C-Hubs |
03-31-2012, 09:01 PM | #3 |
RCC Addict Join Date: Nov 2006 Location: Lowell, Arkansas
Posts: 1,307
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Another dude on a diet! Plastic bodied SCX10 shocks are lighter. Just sayin' |
03-31-2012, 09:04 PM | #4 | |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg Quote:
I still have to purchase some other lightweight items in the future as well. Don't call it a diet. It's a nutrition plan. | |
03-31-2012, 09:08 PM | #5 |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Cut to the chase. SCX shocks with 40wt oil up front and 55wt oil out back. Not internal limiters. 10mm external limiters for now. |
03-31-2012, 09:12 PM | #6 |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Swapped out the old V6 Vanquish SLW's for some spiffy new D-Lux beadlocks with aluminum hardware. Dropped about 0.5oz per wheel/tire/foam Sanded the sidewalls on the Khoas-Rovers and removed about 0.2oz on each tire. Tires were sanded before weighing them. |
03-31-2012, 09:14 PM | #7 |
RCC Addict Join Date: Feb 2008 Location: Crawlerado
Posts: 1,411
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg The gain in overall smoothness is well worth the few grams of extra weight. There's no point in going lighter if it makes the car handle worse Looking forward to driving around ECC with you, I would really like to see the differences between the berg and xr axles on this chassis. |
03-31-2012, 09:20 PM | #8 |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Electronics are Dual Mamba Micro pros with Castle BEC and HiTec 7950TH servo. The tires I have been using since Oct 2010. Good ol' trusty Khaos-Rovers built by Crawler Innovations. with Crawler Innovations Closed cell 5.5" inner foams Crawler Innovations Front Soft outers Crawler Innovations Rear medium outers Found some old original Moon Buggy skins in the parts bin that Krawler Koncepts made up for me a long time ago. Went ahead and recycled them into this build. Truck is 5lbs 0.8oz with 450mah battery. Excuse the iPhone pictures. Too convenient to not use it for pictures. Last edited by Szczerba; 03-31-2012 at 09:24 PM. |
03-31-2012, 09:22 PM | #9 |
I wanna be Dave Join Date: Sep 2005 Location: Houston, TX
Posts: 16,952
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Nice work Shane! |
03-31-2012, 09:31 PM | #10 | |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg Quote:
I was wondering how the XR axles compare in berg weight. I assume they are lighter. Going to get a couple hours of testing in tomorrow. I have exactly two 450mah packs through this new setup and all I can say is I left the knuckle weight the same as the old 4.0 setup for now. I'll play with weights and shock/link tuning tomorrow. The setup right now seems even more stable than the 4.0. I dropped about 4oz in RTR weight and I can really tell the difference. No more "pushing" of the front end, truck will grab better than a day ago. Not that the 4.0 setup pushed but the 3.5 is alot smoother overall, so far. I can make transitions like it's nothing. Like when the front driver is in the air and the rear passenger tire is in the air, the truck is ultra stable. I drive slow after two years of running pin tires. With the 3.5 setup, I just take it easy and work the rear motor mix and it will do some crazy things right now. Sidehilling is beyond belief right now. It was good with the 4.0 but the 3.5 kicked it up a couple notches. I started with the rear uppers all the way up and the front upper one down from top. Ran one pack like that. Then moved each down one hole. The rear uppers where hitting the chassis braces and limiting shock down travel before I moved them down. Still does it a little but it's now about when my limiters kick in. I did notice some differences in the two link positions, time will tell where they'll end up. More to come. ... Last edited by Szczerba; 03-31-2012 at 09:49 PM. | |
03-31-2012, 09:35 PM | #11 |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg Thanks Jeremy. This 3.5 setup is slick but I'll put enough of my "ghetto" touches on it to bring it back down a couple notches in the looks department. Like my recycled "Guns" skins. Couldn't help it. Secret Agent, old guns skins just sitting there. it works. And yes, the skid is reversed. Not pointed at you. But yer smart and probably have already caught it. I can't get my electronics up on the axle so the rx goes on the reversed skid and the battery is on my homemade axle mount. |
03-31-2012, 10:03 PM | #12 |
RCC Addict Join Date: Jan 2011 Location: Razorback Haven
Posts: 1,620
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Good work Shane!! |
04-01-2012, 06:08 AM | #13 |
I wanna be Dave Join Date: Mar 2008 Location: In the Dark Edges of your Mind
Posts: 6,386
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
You forgot the balance point picture I'm curious where that is compared to the XR and considering your electronics are in the chassis instead of on the axle. Looks good... I knew you'd get the new chassis. Just had a feeling, |
04-01-2012, 06:59 AM | #14 |
Rock Crawler Join Date: Jan 2011 Location: New Brunswick
Posts: 525
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Rig looks amazing! I really like these new YTC chassis. Nice job re-using the Skinz too. You should post up a pic in Michelle and Rob's Inside Skinz thread to show the longevity of a well made panel with Inside Skinz.
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04-01-2012, 07:51 AM | #15 |
I wanna be Dave Join Date: Mar 2007 Location: roland,ar
Posts: 5,981
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Fixn to go meet shane and do some practice/testing..ill get some pics/video of this sexy beast. I'm shure duuuude thinks the chassis Is to light and needs a cheeseburger.. |
04-01-2012, 07:58 AM | #16 |
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
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04-01-2012, 12:51 PM | #17 |
RCC Addict Join Date: Nov 2006 Location: Lowell, Arkansas
Posts: 1,307
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Weighed anything lately?
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04-01-2012, 02:22 PM | #18 |
Rock Crawler Join Date: Apr 2009 Location: Saint Charles
Posts: 732
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Really nice build Shane I look forward to seeing it in person. I crawled with Kevin today and he busted out his XR secret agent and it is a thing of beauty Last edited by jeepsohigh; 04-01-2012 at 05:25 PM. |
04-01-2012, 04:35 PM | #19 |
I wanna be Dave Join Date: Oct 2008 Location: Sumter
Posts: 6,141
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg
Nice work Shane...just like everyone else I'm looking forward to checking your and many other rigs out at ECC this year...so many changes have been made overall |
04-01-2012, 06:19 PM | #20 | ||
I wanna be Dave Join Date: Oct 2007 Location: Castle Rock, WA
Posts: 8,785
| Re: Szczerba's 2012.2 Secret Agent'd 3.5 Berg Quote:
Quote:
Like you said, most of the sweet parts are the 3.5 secret agent chassis. Thanks Ryan. I made a few changes to the rig today as well. | ||
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