Trying to race a boost (17.5 class)

kruzracing169

Well-Known Member
Messages
210
Location
ND, USA
Just bought my daughter a boost buggy, came with Tazer 15t fwd/reverse ESC and 20T brushed Dynamite motor. Looking to upgrade to a brushless sensored 17.5, Blinky class spec approved motor combo. Before I make the purchase, trying to verify the can size of the motor. Is it a 540 can size, right?
Also, I attached the combo I am looking to upgrade to. Any info from you guys would be awesome.
A62H_1_20170616844991210.jpg A62H_1_201706161561959293.jpg
And here is a pic of the awesome buy I got used off of eBay. I will be upgrading it to the max for what is aloud per say.
This will be ran at 2 different club races this summer if the classes cross over.
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jbalsamo23

Active Member
Messages
34
Hi, yep the stock motor is a 540 and the hobbyking motor will fit just fine. The ESC might be a little tight, maybe check the dimension to make sure it will fit were you want to put it. If your planing on just running 17.5 blinky class you might be able to get away with a 60amp esc. Cool car, good luck. keep us posted.
 

i_r_beej

Well-Known Member
Supporting Member
Messages
894
With a 17.5T motor you'll need to replace the stock 87t spur with something smaller. For Stock Buggy racing a 69t spur with a 31-33t pinion is fairly typical. In my experience the motor simply could not be moved close enough to allow proper mesh with a 69t spur. A 72t spur worked nicely with a 33t pinion. You can easily adapt Associated spur gears to fit the ECX input shaft. Here's s write-up of the procedure. Once you have the parts it takes about 5 minutes. https://ecxforum.com/threads/what-spur-gears-compatible-with-ecx-2wd-cars.348/#post-3619
 

kruzracing169

Well-Known Member
Messages
210
Location
ND, USA
UPDATE:
Electronics are all wired up and everything is set. Just waiting on the new Associated gears to show up. I wanted to share.

I still have a few more upgrades to do after the gears show up, I just want to run it.

Next...
  • Steering/turnbuckles
  • Body
  • Shocks
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kruzracing169

Well-Known Member
Messages
210
Location
ND, USA
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Still working on this one.....patience. I should have all updates here very soon. Race day is close, a few more weeks and this project should be complete. Enjoy with the teaser
 

kruzracing169

Well-Known Member
Messages
210
Location
ND, USA
Well, I hope everyone has had some patience on this build. I have my first video released on You Tube for the front suspension conversion to B4.2. It's a little rough around the edges, but it gets the job done. I should be doing a 3 part to the suspension build on You Tube. Front, Rear, and overall adjustments. Anything I am missing, let me know. Thanks for the support....this site has helped a lot.


Again, I will do a complete new post on the boost, just wanted to release a little something.
 

Steve g

Well-Known Member
Messages
161
Would the b4.2 front hinge pin holder (front bulk head) work with the rest of the stock ecx suspension? Mainly the a arms. Keep breaking mine, someone brought that same one up in another post, but haven't seen it used with the ecx a arms. I know you need to drill 2 holes for the bumper.
 

kruzracing169

Well-Known Member
Messages
210
Location
ND, USA
I had to post a teaser!!! I think I finally found the modification for the Boost rear suspension. Cross your fingers that this works. I will be running it in a few weeks for testing it out. I will post the how-to once I tested it. Thanks



Better droop in the rear.....
4723

More toe-in on the rear.....
4724
 
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