If you were in the RC hobby back in the 80s and 90s, there is no doubt you’ve heard of Davis Diesel. They offered these cool diesel conversion kits for nitro RC car engines that did away with the glow plug head in favor of a unique glow-plug-less diesel head. No, the fuel they used wasn’t pump diesel, it was actually a mixture of ether and castor oil, but it was still cool nonetheless. Believe it or not, Davis Diesel still exists to this very day and they still make diesel conversions for various RC engines including the Traxxas 3.3! Check them out at their website here.