Anybody mod their own engines? Post pics and techniques, I am going to give this a shot on an old mt 12 i got in a trade. But I have no clue I do have a carbide bit and a dremel, some polishing compund bits and stuff.

Try to look at any modified motors to get an idea...then test motor afterwards to see the effects.

Engine modding is 80% crankshaft work and about 20% sleeve work.

plenty of info on the net to satisfy your curiousity.

I was afraid I had gone too extreme with my port mods but it fired up first try, idled smooth and accelerated quite a bit faster..

I really can't find any good info as stated above. I have searched high and low and can only find people offering to mod the engine for you. I have seen many pictures of port work and crank work but I don't think it is any good if you don't know why and what you should do and what is stage one and so on,,Is there any videos or books or websites that take you through the whole process from stage one mod to lowend mods high end mods and what you need to get started. IF not someone should make one and sell it to me!

The one think that you have to think about is that most of the good modifiers, and there are very few, learn waht works and what doesnt with trial and error. They used their own money to buy engines and modifie them, and when it didnt work they were out the money of the engine. They're not just gonna come out and tell you all the secrets.

If want to learn you will have to do it yourself.

Jammin: Do a search here, lots of great modifiers posted photos of their work, but take car, don't copycat without knowing what you're doing and the most important, WHY. Some time after, you'll start to think by yourself and know what, when and why to do.

The best advice you could have received has been told now. Artificial-I told you to see the sleeve and look for streaks on the sleeve, this is only one part of the equation, the other is have a grasp on crankshaft degreeing (do a search on engine degreeing and study how to do it).

Hoopdog: Your figures are partially correct, no matter how you mod the crankshaft, if the porting on the sleeve is crap, your engine will be marginally better, but not much more. Alas, the carburation and clutch adjustment are the key, remember, raw power isn't the only variable on your equation, they enter a lot of other.

Heres a couple pics of a OS .18TZ engine I modded. Pics of the boost port didnt turn out.. But basically what I did there was put 2 'fangs' on each side of the boost port and angled them down and outward twards the bottom of the sleeve.

Heres a 3.3 traxxas engine out of the Revo I did also. Both of these engines showed very nice gains. Theres more work that I did to them other then what you can see.

I prefer the sleeve only.

I don't have the guts to mod the crankshaft

Very nice You have the skill

Did you balance again the crankshaft ?

No. As its not possible to perfectly balance a single cylinder engine. Ive ran my modded engines like this for YEARS and ive never had an issue. Only thing I see if gains

http://tntmods.com/?p=balance

I wont argue with anyone on here as thats not why im here.. But I'll state a fact. Its not possible to perfectly balance a single cylinder engine bottom line. I dont care what TNT mods says... But this in know way means that TNT doesnt do a good job on there engines, please dont get me wrong there.

where can i get those bits to cut the fine intake poets, this sleeve pic looks very good