I have been searching the web but have not been able to get a decent answer. What is the temperature the would be called "normal" for a supercharger with teflon strips? I know the answer is no set in stone, and drive ratios affect it. The teflon strips wear out and need changing. I was wondering if Delrin could be used instead but am unable to find operating temps. Delrin is good to 329F before it deforms from heat. Any one know the temperature of a supercharger in operation?
I couldn't tell you , But you could look here and see if its a suitable subs***ute based on what Teflon puts up with http://polyfluoroltd.blogspot.com/2011/04/seven-sides-of-ptfe-or-why-ptfe-is-way_18.html?m=1
I've been advised by an old engine builder that teflon lined blowers in street use generate more heat than a regular blower due to case / rotor clearance. Additionally he is of the view that teflon is not necessary with street use because of tight tolerances and heat generated due to friction. Can you run with teflon, it will run cooler?
Teflon on the outside of the lobe, nylatron normally in the ends of the rotors. Even with these aids, blower exit air temperature still depends on - 1. Case size 2. Pressure 3. RPM (blower) 4. RPM (engine) 5. Length of time running at a given rpm 6. How tight the rotors are to the case (even with the plastic strips) 7. Engine size 8. Inlet air temperature 9. Inlet air, inlet (one of those "****py" aircleaner scoops..? Or smooth proper air inlet) 10. Manifold design So...no...there is no single (or even a small range) answer. Just let the pro's do the rebuild, you'll be pressure and dollars ahead, in the end. Mike
If the delrin has a lower coefficient of friction it will run cooler and have less wear. I am looking for case temp not so much air temp, I suspect the case will be hotter then the air. Just takes a laser temp gauge to find it out.
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