Rccrdt

Hello everyone, I wanted to share the need for advice here as well since I had done this on quarterscalelegends in the past but I can't use the credentials anymore. I'm building a quarter scale pro mod made of 0.47 inches full-tube chassis, about 45-inches long and 12-inches tall. I only have the finished chassis, fuel tank, a 55 pounds servo capacity and I'm completing the front axle using a CNC lathe, nothing else. In the project, being homemade by me and another friend, I want it to be as cheap as possible, especially to save money for the motor and rear axle drive system. without engine it should weigh around 20 pounds, does anyone have a professional engine in mind that I can take into consideration? being not too excessive economically, having a steady gait for giant scales. Thank you!

1QwkSport2.5r

Giant scale (1/4 and bigger) and cheap do not go hand in hand. Way back when, a Conley v8 would cost you $8-10k depending on induction. The truck kit was another $7-12k depending on setup and accessories. I would say to find a Conley v8 engine, but they are pretty rare. Anything Chinese ain’t going to be worth spit, but you have some options there. Toyan makes a v8 I think. Not as powerful as a Conley, plus you’d have to build it.

Rccrdt

I was searching somethin way more cheapy than Conley. I found some engine for airplanes that goes from 60 to 80 ccs like rcgf, theyre pretty interestin since this are under 400 $ and for the torque & hp they have is pretty stunning. Btw this is not somethin made by a fast decision since I need to get before all servos and arms.

1QwkSport2.5r

I think you’ll end up being pretty disappointed if you actually get it together. I think you need to get your driveline sorted before picking a power plant. A sub-80cc gas 2-stroke is going to be pretty lame in a large scale heavy vehicle. To say their power is stunning…. That’s a bit much. They will not make that advertised power in your application. 2/3 at best. It could* work, but lacklusterly.

Rccrdt

I know I need to choose the best option for this, If I had a large budget I would definitely buy a rtr 1/4 drag car. But for now, I'm trying to do it by myself and in a cheap way. Also I'm trying to find the most lightweight parts on the net for the reason u wrote, and yes, drivetrain will be made by me so it will fit the chassis for sure. Thanks for the fedbk