Nice work, 1 year later!. I carved up a old HPI Nitro Start .25 and made it sing much better. Advanced the timing in the crank and channeled the liner, shimmed the head, ect. Drop one more size tighter in carb restriction and it will probably pull wheelies, with a center diff. Tighter carb restriction gives you better low end throttle response, at the sacrifice of a bit of top end. Some of the top end can be brought back with a better pipe. Longer run times as well with a restrictor. The Gimar "Red Putty" heavy modded Team Novarossi's had a aluminum 7mm restriction, on a .28 8 port, with a 9mm overall-throat carb. That modded engine covered both the bases, low end and top end. Gimar modded "Red Putty" anything is a animal motor, that starts right up, first lick with preheat.

from own experience (because i port my out of spec engines as well), the more 'material' you remove, the more fuel you are going to burn. of course, this is still very little fuel.. but its going to happen. still, this is give or take the best diy port job anyone could do at home given they have the tools to do so. i salute you for your findings!

Dam ...I could tell it was faster on that first pull of the line. Thanks for the vid. And you're right there aren't many videos about I'm glad you put out!

Awesome work on that engine. Good to see some comparisons 😊

Great bit of fettling mate 👍🏻 I’ve got an old 1/16 truggy in the shed.. might have to do this with that little ripper

Great job 🎉🎉

This is insane LOVE IT 😁

The most significant improvements will be on the Mid to Top end of the RPM. I also find balancing the crankshaft gave me the most improvements from idle and acceleration. You will need a lathe to get it really balanced and to remove any kickback. I would say you did a great job. When I used to race 1/8 Onroad & Offroad back in the early 2000s we had no choice but to port, polish, and balance as even the high-end OS, RB, and Rossi engines were poor performance. Everyone was modding the engines and if you wanted to podium you had no choice but to learn how to be the best at improving engine performance. Especially, with the longer straightaways they had back then. Which is why I enjoyed running the stock class quite a bit. It was racer against racer not car vs car.

You can hear it and not only does it run smoother but you have less drag. I've seen people completely cut the piston sleeve off.

Awesome work 🚀🚀

wow,awesome mod and rc

Great work cool video

good video and nice test

It sounded different on its restart (better) than before, really crisp and quite faster.😊

This is a very good video. Boyo !!!

I did this with a Rossi 45 airplane engine. I also cut about 1mm off the top of the exhaust port. It made that old Scat Cat go like stink on a tuned pipe. It's been a while but I do remember getting almost 21k rpm on the ground with a 9x7 prop.

Probably, It's the cleaning of the engine that improves the performance, not the porting, The porting will only inflate the nitro consumption. Your exhaust residue will be more (wet) now, with all the unburnt nitro.

Good work 4mph gain is great

I've thought about trying this myself, I've always worried I'd ruin the engine. Definitely worked well for you. Great work 👏

Surprised by the results! Definitely don’t wanna risk doing it myself on my LRP .32 savage 😂 great video!

I need to try this lol thanks for the video i like it

Hi 👋, it might be worth contacting, David Mills Prestwich models, if he is still about, you could of polished the inside port of a crank, and flair the top open, When machining the liner, it is best to hold it in a soft pair of jaws, so you have both hands on the Dremel tool, after running the engine for the first time you get staining marks on the outside of the liner. This is a good indication of where you can actually machine the material why to make better fuel flow. If you make yourself up a timing plate/disc to bolt onto the shaft, and take note of where the piston opens and close the exhaust port, this is something you need to do very very carefully. You can open the exhaust port up only by a few thousand at a time. Without knowing what sort of engine it is, there is ways of cutting away part of the piston at the bottom., At the moment, I cannot remember what you need to do, as it has been nearly 50 years since I have race tuned a engine, I was back in the late 80s, early 90s, are used to race, radio controlled hydros , 3 1/2cc CMB 7 1/2cc OPS 11cc 15cc CMB , AT THE time I was one of the top races, it is a good idea to get several piston, a liner sets and hundreds as well, Suggestion, get yourself a little black book and take notes of what you’re doing and what degrees you are machining things to do, and I suggest keeping one as piston liner as stock, Good luck, with your project, PHIL FROM THE DARK SIDE OF THE MOULIN FRANCE.

Have to change the crank timing as well. Both work together. All my 2stroke racebikes have there ports cut/shaved, including intake and exhaust port as well as cylender ports. Makes a big difference. Even if nothing else is done. U will see a difference

You cut the intake on the milled edge just smooth the cut down in with a moto tool

Хороший результат).И это с таким старым,изношенным двигателем.Если бы верхние части каналов в гильзе снаружи совпадали с каналами в картере и не было там ступенек,было бы ещё лучше.

You got more power by cleaning that dirty ass motor.

Perfect

New main bearing probably made quite a difference!

Verry nice

Lean it more!

not bad at all you didnt even drill out the center of the crank and silicone fill it even more bottom end pick up and dill out the fly wheel

Were did you get that gps for the car bluetooth to your phone

Ah oui il prend plus de tours et plus vite 👍👍

Any thoughts about porting the exhaust head outlet & then the exhaust pipe face where it bolts to the head 🤔

I'm sure that's my old virus.

The difference was it was lean on the first 3. And either cold or rich for the last 3.

Di quale motore si tratta? Dove è stato fabbricato?

Chique carro 😊

I got the same car in the loft

J'ai eu un T2M pirate évolution un monstre

Make it a tad richer up top. And the two stage idle will come back in. Watch JQ video on two stage

You should have open the in take on the crank

For better results change timing of crraknshaft

Get a new header and pipe with springs...those rubber couplers tend to rob horsepower

And your low speed needle is a bit lean

Great vid mate. I've pmd your Instagram account