Silicone exhaust coupler

[Jshaff16]

I found this material by the foot on Amazon. I tend to replace it more often than not. Figured I'd give it a shot. Had same dimensions color texture etc as the ddm ones. And much cheaper. Will see how it holds up.

 

[Rep732]

I'd be interested to see how that holds up. My truck tends to melt mine

 

[Seandonato73]

Silicon wasnt really meant for the heat of exhaust. Even the "high temp" silicon hose will eventually break down. Some last a bit longer then others. Just the way it seems to be.

 

[John Parks]

Yea Sean nailed it, most silicone is only rated for 300-400 at most

 

[Z.hb71]

Yea Sean nailed it, most silicone is only rated for 300-400 at most

Silicon wasnt really meant for the heat of exhaust. Even the "high temp" silicon hose will eventually break down. Some last a bit longer then others. Just the way it seems to be.

Ok so what do you guys suggest then? My coupler is on its way out.

 

[Jshaff16]

Silicon wasnt really meant for the heat of exhaust. Even the "high temp" silicon hose will eventually break down. Some last a bit longer then others. Just the way it seems to be.

Thats only reason i tried it myself. Seems to get brittle and as you said break down overtime. Even if this is the same sh1t Ive been using its cheaper than buying elsewhere. I believe I ended up with 6 pieces for about the cost of 2.5 elsewhere.

Ok so what do you guys suggest then? My coupler is on its way out.

I will probably be able to report back wednesday or so this week. Finally got one of em close to operable again. And its supposed to be nice and sunny a few days late this week.

 

[Z.hb71]

Thats only reason i tried it myself. Seems to get brittle and as you said break down overtime. Even if this is the same sh1t Ive been using its cheaper than buying elsewhere. I believe I ended up with 6 pieces for about the cost of 2.5 elsewhere.



I will probably be able to report back wednesday or so this week. Finally got one of em close to operable again. And its supposed to be nice and sunny a few days late this week.

? All the ones off ddm I keep destroying. The one I have now is a Bartolone one I think, and it's lasted the longest of all of them, but it's on its way out. So I want a better solution

 

[Jshaff16]

After I heat it up real good I'll either have a gooey mess in my chassis, a small fire or it'll be good to go. I'm shooting for the good to go personally lol

 

[Z.hb71]

Never had a fire, And I hope to keep it that way ?

 

[Seandonato73]

The biggest issue with better materials Is, 1 stuff that stands up to high temps is normally semi ridged. Ie doesn't like to get bent, or stretched. 2 the size we need is very small compared to normal exhaust systems.
Its an odd give and take kind of thing with our 1/5 scale rc. If we needed 2"+ tube for our exhaust I could reccomend a few different materials to try. But, generally speaking, were 1" or under. That eliminates all the stainless flex couplers, and most, if not all, fiberglass impregnated materials. On top of that just imagine trying to stretch 2 or 3 heavy duty springs over a ball and socket style coupler, with a graphite composite seal. I'm sure there is something out there that would work wonders, but it's either cost prohibitive or a very niche product.

 

[DougStar]

I bought re enforced silicon tube from a 1/1 car turbo s h shop ?? put on the reed motor from day one and its still there and I have it on the losi for about the same time and its still ?

 

[Seandonato73]

Reinforced just means it has a fiber weave through it. Do you recall what temp it was good for?

 

[Jshaff16]

I searched for 1/1 stuff too without much luck. They were more concerned about pressure than temperature from my searching

 

[Seandonato73]

Yeah, normally you use silicone on the air side, so high heat isnt a primary concern.

 

[DougStar]

I don't remeber??‍ been on this build from day 1 with no leaks??

 

[Seandonato73]

?‍ wtf good are you then?

 

[DougStar]

Here is what I have works great only cost a couple of bucks??

 

[Seandonato73]

Pretty heavy weave in it..

 

[DougStar]

its been awesome ? still the same piece on my reed block from day 1 no clamps required ?

 

[TODD]

If you run it hard for an extendand amount of time like we do in boats? Head pipe temps will run between 1000 and 1200 F. So look for material that will run that high or close to it. Unless wide open on an oval or in the dunes where you are heavily loaded? You may never see those kind of temps. But I would find the highest stuff you can.