Port and polish. De-anodizing?

[Bryson]

Well after getting some help form a member of another board I frequent these days, I decided to try my hand at porting and polishing. I had a extra 2.5 laying around and decided it would be a good dummy engine. After a few hours of work I think I did pretty well. I havent ran it yet, but it looks very similar to his pics of his engine. I think it should run like a raped ape lol! Heres a pic, kinda crappy but you can see how shinny everything is now, and the intake port on the crank has been enlarged somewhat if you know what stock looks like.

So if this works out I'm planning on doing the same to my 3.3, and then maby my 18tm. But heres a question for you de-anodizing people, is it possible to de-ano a head-heat sink? I feel to cheap to buy the nova head for the 3.3 I want, so I was just thinking of striping the blue and polishing it to achive the look I'm going for. Is it possible? Or maby some one has a nova head laying around for a 3.3 they dont need lol? Anyway. Ill keep eveyone updated on how the port went if I decide to wake up early tomarrow before school and give it a whirl. Thanks for lookin!

Bryson

 

[ohmygahitscoby]

Wow that looks awesome! Can you PM me the link so I can do this to my engine after I break it in? I wanna try it on my old engine so by the time I get my engine broken in I can start.

 

[bnrpat09]

hey heres some hand by hand steps

 

[ohmygahitscoby]

Hard to read though. I'll try to find the thread Bryson is talking about.

 

[Bryson]

Thread, what thread lol. I did this with a little help from a guy from another site, wish I could have read something like that lol. Idk about messing with the sleve though, that risky buisness. I just ported the crank, and polished all the internal parts, like that back plate, crank, exhaust port, and such. But be shure not to touch the inside of the sleve, or piston if your going to try this, that would spell disaster lol. I'm puting it all together tonight, sealing everything and preping everything, so it looks like ill run it tomarrow if its not raining. Thanks for that link though, next time, I might have to try that.

Bryson

 

[ohmygahitscoby]

Oh, I thought you got it from a thread, I need to read more carefully. I hope it doesn't rain tomorrow, I wanna use my car, but I can't anyways because I overcharged one of my battery packs for my starter box. Lol. Anyways, nice job

 

[Bryson]

F-in rain! This blows. Its not even that its raining, just the ground is wet so I can't go play lol. Damn, at least I have the day off from school to wait it out, I'm chomping at the bit to test my work. I either have the feeling it will work really well or blow up lol. But any one have an idea on de-anodizing the head. I'm also thinking about doing the chassie too so if anyone has any tips it would be apreciated.

Bryson

 

[beason]

on de-anoing the head use some greased lighting. i took a soda can and cut the top off, put the head in and filled it with the greased lightning and let i set for a bit. came out a dull silver then you can polish it to a shine.

 

[Bryson]

Cool deal. I think ill try that before I drop 30 bucks on a nova head then lol.

Bryson

 

[SublimeRevo]

I haven't done this before but I read on another forum that you can use Easyoff oven cleaner also. Might be worth a try. Greased lightning is probaly cheaper though.

 

[beason]

the greased lightning works faster and is less corosive. the easy off will pit the aluminum quickly

 

[Bryson]

Well, I just went out and tried to give it a whirl and it runs. Dosent run much better yet, but I'm still jacking around with the carb(mind you this is the same carb that gave me all the head pains with my other 2.5). I dont know. I'm having some tune issues, that I know are rich related, but when I lean it just the slightest bit it goes south. Then I noticed a lot of drag on the truck, I keep fiddiling with the breaks, then it turns out, dedede me forgot to set the gear mesh for the differnt motor lol. So now I'm waiting for the motor to cool off so I can reset the mesh and go back to it.

Bryson

 

[Bryson]

Son of A B****! Well turns out it wasn't the gear mesh, I some how snaped a clutch spring. So beings I dont have a spare, ill have to get one this weekend. This sucks lol.

Bryson

 

[markallen]

I have learned if you just polish it all up you're not helping performance much.You have to start working on the timing on the crank and sleeve.Then you'll see a big difference in how it runs.

Mark

 

[ozwes007]

Careful

As an experienced full size 2 Stroke tuner I would advise extreme caution with your desire to port these small motors. 0.05mm either way can mean the difference between a motor that screams and a motor the splutters. Putting it into basics for you, when you alter the ports up or down you are altering the "cam" timing of the 2 stroke engine. Considering that if you divide the stroke off the engine by 360 then divide this by 2 gives you the distance per degree of change for the port you are changing. Usual rule off thumb is anything less than 2 degrees is un-noticeable and anything above 4 degrees is considered a realistic change, so I would suggest only altering the ports in 4 degree amounts. slowly slowly