Silicone Exhaust Coupler?

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tizdaz

tizdaz

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Hi guys, im looking to buy some silicone for the coupler area of my VRC pipe, but not sure what temperature the pipe gets so i get the right silicone, the silicone im looking at say upto 170°C ...will this be enough?
 
Silicone baking mat is cheap and good for 450F. If your pipe gets hotter than that i would be more concerned that your RC is literally on fire.
 
Stainless pipes turn yellow at around 450°F.
Actual EGTS are usually between 1200-1500°F

In my experience all silicone couplers melt eventually. The closer they are to the port the faster they melt.
 
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This is what I'm using, unfortunately no part no. Or branding...
 

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Dunc2504 said:
RVT silicone pipe is the stuff you want , works on turbos , so should handle the heat well.
Usually an orangy red colour.
Click to expand...
You don't use silicon hose on the exhaust side of turbos they would fly apart in short order. the hot side of the compressor doesn't see temps nearly high enough to wear out silicon, and is a lot lower then the egt seen in the exhaust of our 2 strokes. High temp is the primary reason the rubber and silicon couplers only make it a few hours of run time, slobbering oil on them doesn't help any either.
One of the reason we all search for a high temp, oil resistant solution. (Which you honestly wouldn't think would be so hard in this day and age.)
 
Seandonato73 said:
You don't use silicon hose on the exhaust side of turbos they would fly apart in short order. the hot side of the compressor doesn't see temps nearly high enough to wear out silicon, and is a lot lower then the egt seen in the exhaust of our 2 strokes. High temp is the primary reason the rubber and silicon couplers only make it a few hours of run time, slobbering oil on them doesn't help any either.
One of the reason we all search for a high temp, oil resistant solution. (Which you honestly wouldn't think would be so hard in this day and age.)
Click to expand...
Nobody mentioned the exhaust side of a turbo , which I agree gets super hot , seen mine glowing red many times.
But headers on two strokes don't get as hot as that. Silicone tube on my Taylor sidewinder pipe hasn't melted yet , though header is quite long and joint is socketed. Header on my VRC nautilus pipe is just a stub , but so far tube has held up quite well. But will not last forever and should be looked on as consumable.
 
Dunc2504 said:
Nobody mentioned the exhaust side of a turbo , which I agree gets super hot , seen mine glowing red many times.
But headers on two strokes don't get as hot as that. Silicone tube on my Taylor sidewinder pipe hasn't melted yet , though header is quite long and joint is socketed. Header on my VRC nautilus pipe is just a stub , but so far tube has held up quite well. But will not last forever and should be looked on as consumable.
Click to expand...
they can, although I suppose in rc, it's not for prolonged periods of time like you see in automotive/recreational use. Thin pipes dissipate heat a lot faster then heavy walled headers and way faster then cast manifolds. I digress, what I meant was, what were using isn't the best seniaro for longevity, even if its the best available option. The dbxl ate through couplers with the dom pipe, the vrc on the vekta and 5ive t don't seem to be quite as bad, but not great either.
 
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