Converting Boost To Circuit

Ledged

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Hello people, I was wondering about the differences of the boost and Circuit non-electronic wise, chassis and other sizes. What do you guys think it would take to convert it? I'm mainly wanting to do this because of part upgradability, well the boost is a really different size so a lot of hot-racing parts don't even fit, mainly metal driveshafts for the brushless combo I ordered, snapped plastics real quick :(. I was thinking about modifying stock Traxxas vxl driveshafts, but don't know how I will cut the metal screw part as the washer hole if far too back for the boost wheels. Any ideas? Thanks Y'all

Using stock everything except my separate electronics and camber links.
 
If i switched to RPM OverSized Rear Axle Carries for BOOST, do you think traxxas vxl driveshafts might work? or the otracing alternatives?
 
Information about modifying VXL driveshafts to fit are stickied in the "Chassis and Drivetrain" forum. This should apply as all 2WD ECX cars are essentially the same (with the exception of swingarm length).

The rear spindle carriers allow for a larger bearing but I'm not sure how they would affect the installation of VXL driveshafts. My guess would be "not at all" since the VXL driveshafts are a virtual direct replacement and the RPM spindle carriers are designed to fit ECX spindles and shafts.

I have both cars. The Circuit has a longer chassis and longer swingarms. Those are the primary differences on the chassis. You can mount the Circuit arms (or RPM's compatible parts) directly on the Boost and you'll have a short Stadium Truck. You could also buy a chassis and move all parts over and install the longer Circuit arms. You'd also need the Circuit rear shock tower as this is a little different from the Boost's tower (i think its only difference is body mounting stubs). Wheels and tires are also going to be different so you'll need some of those. You'll also need new shocks as with longer swingarms you'll need longer shocks.

https://www.horizonhobby.com/chassis:-1-10-2wd-circuit-ecx1017

https://www.horizonhobby.com/rear-suspension-arm-(2):-1-10-2wd-circuit--ruckus--torment-ecx1019

https://www.horizonhobby.com/front-suspension-arm-(2):-1-10-2wd-circuit--ruckus--torment-ecx1018

https://www.horizonhobby.com/front-tire--premount--black-wheel-(2):-1-10-2wd-circuit-ecx43005

https://www.horizonhobby.com/rear-tire--premount--black-wheel-(2):-1-10-2wd-circuit-ecx43006

https://www.horizonhobby.com/aluminum-shock-set-front:-1-10-2wd-circuit--ruckus--torment-ecx1095

https://www.horizonhobby.com/aluminum-shock-set-rear:-1-10-2wd-circuit--ruckus--torment-ecx1096

That's about US$135. And you still need to get a body. A new AMP costs US$139. A new (brushed, with LiPo) Circuit is $169.

Honestly, I'd recommend you keep the Boost as is, maybe install a 3000kv-3500kv motor or something that isn't quite so hot, and save that scorcher for your NEXT car.

I used to have an AMP MT, then I upgraded the heck out of it to turn it into a "race-ready" Circuit. After I added up everything I wanted to kick myself as I had spent almost as much as a new TLR race car kit would have cost!
 
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thanks, I'm going to add a leopard 3300kv motor instead and hope the drivetrain will last :D. I noticed my rear suspension hinge pins ( the things that goes from Rear A-Arm to the Bearing carrier) has lost the tiny screw that holds it. Are there replacements? As I keep on having the pin leave halfway and collide with the wheels. I was actually thinking about seeing if there were upgraded versions that may fit. Like a new Rear a Arm or something. ThANKS!!!!!
 
I noticed my rear suspension hinge pins has lost the tiny screw that holds it. Are there replacements?

ECX1045 2.5M x 4mm button head screws.

Unfortunately I am not aware of any aftermarket swingarms for the Boost. I think you'll have to stay with ECX branded parts.

You can also use a drop of regular super glue to serve as a threadlock for screws inserted into plastic. DO NOT use regular threadlocker (LockTite, etc) as these will actually damage the plastic.
 
Thanks dude, I found an easier way to use better stuff in my boost. Im still keeping it a boost, just having the rear a arms as circuits because of more after market parts.

Part list
RPM Circuit Arm Rears (2) $3
Traxxas Camber 49mm (2) $6
Shocks ( some say boost shocks work) $15
Slash 4 x 4 driveshafts ( i already had them) $0

I think this is all I need to get the circuit arms to work on my boost, hopefully. Only cost $24 so I hope it works! Got a lot of these on a ebay sale :)

Also got a BRAND NEW Reaction 4000mah lipo for ONLY 15$!!!!
 
Cool. Please share some photos of the build! And that's a crazy good deal on the RPM swing arms! They're normally US$12! If you're going to install Circuit arms on the rear, I'd suggest you go ahead and mount the RPM circuit arms on the front, too!

Keep in mind that the Circuit swingarms will have greater leverage on the shocks so you might need to run stiffer springs and heavier oil.
 

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