SCREAMER's F-Bomber

[generalee7]

So because I am the kind of person I am and can never stop improving something, this just happened. Wraith length trailing arms from UCFab (about an inch shorter than stock) and VP Wraith upper links with the SSD scale driveshaft. This is so much better than what I had. This shortened up the wheelbase by an inch giving me a better break over angle to get the belly hung up less and a tighter turning radius. Two things that make a better crawler which is what I was trying to build. I basically swapped the whole AR60 rearend from my Wraith just to see if it worked and boy did it. The pinion angle is perfect and now suspension travel is limited by the shocks, not rubbing and interference from the driveshaft. I'm so happy I tried this and hope more people do. The stock TA length will work great for U4 racers and bashing but this is definitely the way to go if you're building something that will spend most of its time below 15 miles an hour and it was just too easy.

I actually really dig that! Wonder how it would look with the stock spare tire installed...

 

[SCREAMER]

I'll mount it back up and snap a pic because I'm curious myself.

 

[4RunnerKid]

i like that a whole lot more than i thought i would

 

[SCREAMER]

It's hard to tell by comparing before and after pics of the whole car so I wanted to show the different TA lengths. This will give you a better idea when trying to visualize how far forward it will move your rear axle.

 

[SCREAMER]

Because I went back to the OCP and got the driveshaft back in its pocket, I regained all of the available up travel from my lowered setup. Now I have the stance I wanted with flat lower links and arms at static ride height. The rear driveshaft has zero contact anywhere at full compression and full articulation and because the axle was moved forward the rear truss kind of tucks inside the rear lower frame rails before the shocks bottom out. Here's a collage I tried to make showing full droop then static ride height with 4000mah battery installed then full compression front and rear. I am beyond happy with the way everything came together and just in time for tomorrow's full test on the rocks. I'm going to my local spot that has everything I'll need to put her through the paces and I'm pretty optimistic.

 

[allanon1965]

I have a set of blue monkey wraith trailing arms that I may try out as well...let us know how they work out!

 

[generalee7]

Any updates on pictures with the spare tire on? Some side shots showing how far it hangs off would be great!

 

[SCREAMER]

No, and it'll probably have to be on my second bomber build because this one ended up being more of a rock bouncer/basher, despite my best efforts, and I ended up needing to put the longer Yeti length arms back on. I also changed out the tires and wheels for some Pitbull's with CI DW single stage closed cell foams. Again, because no matter what I tried initially, this build wanted to be fast. The ESC for this one is getting replaced by a Mamba Monster X with an HH Puller Pro XL 3500kv that'll fit better with it's abilities and this MMP and HH 2200kv Puller Pro will go into the second build. My plans were to build the dedicated crawler first then the go fast but it ended up happening the other way around. I will be doing DMG's adapter plate on the next build as well since it puts more weight forward and, of course, the shorter Wraith length trailing arms. I'll be posting more pics and results with the new setup soon. I'm really going to try to focus on finishing this one before I do anymore work to the second build already in progress. We all know how that goes though. I haven't managed to only have 1 build going since I started this full on obsession. This thing has just been a total blast since I put the first pack through her and I've learned a lot in the past week or so. It'll only get better now as I dial it in from what I learned.

 

[Delbert]

No, and it'll probably have to be on my second bomber build because this one ended up being more of a rock bouncer/basher, despite my best efforts, and I ended up needing to put the longer Yeti length arms back on. I also changed out the tires and wheels for some Pitbull's with CI DW single stage closed cell foams. Again, because no matter what I tried initially, this build wanted to be fast. The ESC for this one is getting replaced by a Mamba Monster X with an HH Puller Pro XL 3500kv that'll fit better with it's abilities and this MMP and HH 2200kv Puller Pro will go into the second build. My plans were to build the dedicated crawler first then the go fast but it ended up happening the other way around. I will be doing DMG's adapter plate on the next build as well since it puts more weight forward and, of course, the shorter Wraith length trailing arms. I'll be posting more pics and results with the new setup soon. I'm really going to try to focus on finishing this one before I do anymore work to the second build already in progress. We all know how that goes though. I haven't managed to only have 1 build going since I started this full on obsession. This thing has just been a total blast since I put the first pack through her and I've learned a lot in the past week or so. It'll only get better now as I dial it in from what I learned.

Dang Screamer, this is some great tech! i havent bought a motor or esc yet and just got some methods to mount up. i was looking at the pitbull or voodoo u4 and was still investigating foams. i think based on your thread, the closed cell CI foams with the pitbulls seems like a good place to start. how are the bigbores working, i am thinking about switching over to them or the proline's.

 

[ScGRaceR]

very nice truck screamer. def sparked some intrest for me on the bomber!

 

[SCREAMER]

Thanks for the kind words guys. Delbert, If you're going to be doing medium to high speed stuff and even some rock crawling then the tall CI closed cells with PitBull RBIIs are turning out to be a really great combo for me and I think you'll be real happy. Voodoo U4s are great after you cut half of the tire off. IMHO Traxxas big bores are just as quality as Powerstrokes but actually smoother and at half the cost and the best part is they fit Axial springs like they were made for them. The biggest difference between the two is ProLine's shock body is threaded for easy preload adjustment for more fine tuning options. The big bores do come with snap on collars that can be used to adjust preload but I would rather spend $6 on the right set of Axial springs and we just gained the option to buy them in original gray or blue now that the bomber has been released with it's blue "Kings". You might also look into a set of BDN's wheel wideners for your Method's. They make the wheels much easier to mount tires and foams to and look very nice. Really high quality machine work.

 

[cmbscx10]

In regards to the shocks, are these the ones you are referring to? Traxxas GTR XX-Long Hard Anodized Shocks (2) [TRA7462X] | Parts - AMain Performance Hobbies - AMain Performance Hobbies

 

[SCREAMER]

I was actually referring to the Traxxas 2662 shocks but those 7462 shocks look nice. I may have to try a set of those. I'll try to post a link but you can get a set of 2662 shocks on eBay for less than $20 shipped.

Traxxas Hard Anodized Teflon Coated Big Bore Rear Shock Set (XX-Long) (2) [TRA2662] | Parts - AMain Performance Hobbies - AMain Performance Hobbies

 

[Biomedchad]

I went with the 2662 big bores and firm axial springs. 50wt in rear and 35 in front. Seems to ride and crawl well. Still need more run time


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[cmbscx10]

I went with the 2662 big bores and firm axial springs. 50wt in rear and 35 in front. Seems to ride and crawl well. Still need more run time

Collecting Shock data. How is your set up working. Any changes?


Screamer,
Liking all your upgrades so far. "thumbsup""thumbsup" On post #26 you have a Blue Spring. Who makes that at is there a spring rate?

 

[SCREAMER]

Thanks CMB, the blue springs are the Axial springs that came with the Bomber. I just swapped them over from the stock shocks. 1.43 lbs/in front and 3.27 lbs/in in the rear "thumbsup"

 

[Drm31078]

So the bomber isn't a great crawler?

 

[SCREAMER]

It's an excellent crawler, basher, bouncer, U4, or whatever purpose you have in mind for it. Just have to build it for your specific purposes, test it out, and make any changes needed. I'm learning a lot every time I take mine out.

 

[Drm31078]

It's an excellent crawler, basher, bouncer, U4, or whatever purpose you have in mind for it. Just have to build it for your specific purposes, test it out, and make any changes needed. I'm learning a lot every time I take mine out.

So where do you think you went wrong in this initial try to build a crawler? You said you ended up with a bouncer instead of a crawler. Rocks were getting hung up on the skid plate and trail arms and wheel length didn't help right.

 

[Drm31078]

So to make a bomber have the same length as a wraith you just need wraith standard length rear upper links, wraith length trail arms, and wraith length rear drive shaft?