I am on the hunt for plastic tubing that will withstand the temperatures within the engine compartment in our 4R's.

PVC tubing gets soft at 180* and will start to get real rubbery at about 230*. Electrical conduit plastic tubing has more fillers and less plastic in it so it will withstand more heat but I do not (yet) know how much. 2.5"ID PVC tubing (Schedule 40) has a 2.875" OD, so that will not work for the ISR project specifications.

Does anyone really know what the indirect temps are within the engine compartment? No I have tried mounting a thermometer in the engine compartment.

 

Acxtually Peter, several people have used that stuff with success. You can feel safe to use it and it does fit. I only mentioned that greater than 2.75 OD would be a tight squeeze.

Hope this helps.
Dr. Z

 

Dr. Z,

That's fine and I may go with your previous suggestion about the electrical conduit material, but I am hoping to find something more exotic ... that comes in black without painting it. :rolleyes:

My moto is "the joy is in the journey".

 

I understand Peter.

I like what I did with mine by having it powder coated. It looks OEM and the powder coating helps reduce heat transference to the intake system.

When I went to get my truck smog certified last year, they didn't even blink during the visual inspection. I even had the DeckPlate open.

So, that's something to think about.

Good luck in your search for the "perfect" stuff.
Dr. Z