Port matching a nitro engine header manifold HPI RS4 3 exhaust mod Part 3 the thrilling conclusion

3 part series where we take a stock HPI rs4 3 evo, test for top speed(part one) then I do an at- home port matching with the Dremel(part two) then I test for top speed improvement(part three)

[@islandrc-duke1972]

great work and information

[@fpvoslo]

Hi from Norway, a tip from me to you: If you bent the fastening-clips a little bit and put a strips through the clip-eye and piece of fuel-tube, your life will become a lot easier. Regards..... 🙂

[@NitroTalkwithTodd]

I have body clip pulls on my vehicles that I run often, but they are cool to have on all cars. Thanks for watching!

[@billtruett8593]

Remember an engine is nothing but an air pump the only thing your going to do by port matching is make it efficient not give it more power so in theory you might get 30 seconds longer on a tank of fuel maybe.

[@NitroTalkwithTodd]

What about adding ramps/fangs to the ports on a sleeve? I want to do that test soon. Thanks for watching!

[@billtruett8593]

@@NitroTalkwithTodd your power in a rc nitro engines comes from the crankshaft and the timing coinciding with your port openings on the sleeve. sure fangs are just like port matching it helps but its in the same category as making your engine efficient. If you want more power learn port timing. Blowdown= piston open to the exhaust port, induction opening= when your piston and crank are in the degrees of crank opening and intake port openings. There are a couple of really good videos on KZbin. TheRwmods good videos to learn on.

[@NitroTalkwithTodd]

@@billtruett8593 you are absolutely correct, true power modification to a nitro engine involves the engine timing. I have done some research, watched a few videos, but I haven't gone down that path yet. It'll probably happen at some point. R.I.P Rex Welch, a true Nitro Hall of Famer. We all learned a lot from RWMods, a source for some of the best nitro info on KZbin. Thanks for your feedback!

[@gainsrc]

Fuel economy?

[@NitroTalkwithTodd]

I didn't test, and I could make an argument for it going either way. It'd be interesting to find out.