Modding your Summit to accept LiPo batteries
So I decided to make the jump to LiPo's in my Summit. I went with the SPC 8200mAh packs. These are a thicker pack and fit perfectly within the width of the battery bay. You do, however, have to modify a few things to make them fit nice and clean. I decided to drop a thread out here with pics and things I recommend doing before you tear off into the sunset!!! So let's begin.
The first thing you have to do is remove both right and left rear battery vents and trim them up. I am going to run the wires through the vent opening. I am using Traxxas connectors, so I have to remove more than if you are using a different style that is smaller. This can be done very easily with an Exacto knife or razor blade. The pics here show the main webbing removed but the corners still need to be smoothed off. You do not want any sharp edges that could potentially cut into the wiring of the battery.
Right vent with two webs removed.
Left vent with one web removed and one trimmed about half. You could cut the entire second web out if you like.
Now that you have those done, you can reinstall them back onto the chassis.
Next, we remove the battery filler (used for thinner batteries). This piece will tilt down and pop right out.
Adjusting the battery stoppers
Next, we need to adjust the battery stoppers. The locations I have set are specifically for the SPC 8200 pack. Just adjust yours accordingly to keep the batteries from moving around while driving.
Front-left location before and after battery install
Front-right location before and after battery install
Before we get to actually installing the batteries, there is one more critical area you need to check. I noticed when I was test fitting the left battery that something was scraping the top of it during installation and removal. Here is the culprit. The outer screw for the ESC sticks down into the battery bay a little. Just remove the screw, file it down a bit, and reinstall :)
Also, take your battery packs and wrap some electrical tape around the bottom near the pack itself. Just a little added protection from and of the plastic!