I need help with my exhaust for my 3W 200cc engine. A friend and I are trying to get my exhaust stacks just right and have welded and rewelded twice and it still doesn't come out identical on both side of my 1/4 scale DS F4U-5N Corsair. Someone recommended cutting the pipes and putting in a flexible tube on each side and then clamping the top stacks the same to a block of hardwood where it wouldn't be seen so they are identical. What sources do I have for a tubing that will withstand the heat generated by my engine? The pipes are 3/4" ID. I have to see what the OD is before I buy any tubing.

Please help,

Gibbs

That is 100cc per cylinder, so you would need at least 25mm branch pipes ending in a single 28mm pipe that leads to the muffler.
I have pipe sections and bends in stock, but you can also get them from www.krumscheid-metallwaren.de

My pipes are 3/4" OD and 5/8" ID. I don't have room for a muffler. I am just running the straight pipes. Pleas speak in English inches so I understand. I'm not goo with millimeters. I always have to go to a conversion chart. What do you have as far a stainless steel flex piping that I can slip into the exsiting pipes and weld them in. That way I can position the stacks where I want them. I can't find anywhere that sells it that small.

Gibbs

That is going to be one LOUD plane.

I know but whats a guy to do when there isn't any room!

Gibbs

Clik on the flag in the center for english!

I have used copper tubbing several times you can bend it to fit.

Baldeagle,

Yes, I thought about that but will the solder hold up to the exhaust temps of this engine?

Gibbs

Use high temp silver solder .... also called silver brazing rod as used in air conditioning equipment. Very easy to work with and it will hold up to exhaust temperatures. Have used this several times with good results.

or you can go to this site

http://www.aircraftinternational.com

click on the exhaust page and go to KS Custom Exhaust parts where you will find all the parts needed to make up any type of exhaust you need to. all parts are stainless and he sells brazing rods that work with a MAPP gas torch that work incredibly well. will never come apart

was just there this morning picking up parts to make up a custom header for an oddball engine.

you can always call him. better than emailing him.very knowlegdeable and helpful

One stop shopping .... would sound like a good idea to me.