Date registered: Jan 2007
Vehicle: 1998 SLK 230
Location: Melbourne, AU
Mentioned: 1 Post(s)
Quoted: 68 Post(s)
from what i've seen its not even a teflon coating its a high temp epoxy coating on the rotors - i cant speak for the charger on the SLK32 though.
if its spun at factory specs it should be fine but the reasons for it to fail are;
Small fragments of dirt and debris may have found their way past the filtration process and cause pitting and delamination of the rotor coating. Other causes of delamination include water injection, excessive rpm, heat cycling and general wear and tear.
more likely reason is high RPM and the heat as a result of that. for a roots blower like on the SLK230 they generate heaps of heat when spun harder, but the SLK32 is a different type of blower it actually does the compression of air inside the s/c itself.
lots of heat = causes stuff to expand = rotors touch = start to scrape and material flakes off... the tolerances are so tight!
the M45 from the newer SLK230 is already spun quite high rpm (still within recommened safe specs) from factory and there isnt much room to move. its close to its limit already
i spin my eaton M62 at 14,500rpm but it is ported... safe factory redline is 14,000rpm. ive done this for few mths now and no dramas
- ASP pulley kit
- 87mm supercharger pulley
- Ported Eaton M62 supercharger
- Ported supercharger inlet manifold
- MAF screen & throttle body screen delete
- Automatic intercooler spray kit
- Single 2.5" Magnaflow Hi-flow cat
- Magnaflow rear muffler + Lukey Ultraflo resonator
- Shift-I progressive shift light
- Custom ECU tune
- Air box delete (custom) with BMC airfilter
- 10c degree STAR thermo fan mod
- FireStorm igntion coil booster
- 5 Bar fuel pressure regulator