I figured you guys know more about the M90 Blowers than any other forum, so hopefully you'll give some input on my dilemma.
I have a twin supercharged Lamborghini running M90's with large ports.
Specs are as follows:
4.5" crank pulley steel
2.5" Supercharger pulley Aluminium
Engine redlines @ 7500 RPM
3.0" alt pulley Aluminium
water pump pulley steel
idler pulley steel x 3
Car has been running great, zero belt slip & 4.5 psi boost, low boost i know, but you should see the port work on the motor, as well as a V12 doesn't help with these small blowers.
So, today i had a nice stretch of open road, flat footed it & took the car to 180 MPH top of 4th, shifted into 5th & coasted down to exit, when i come down to a slower speed of 40 mph, blue smoke was emitting from the engine cover, superchargers were quite, not good. Pulled into a gas station and there is the belt, just melted on the grooves, no signs of rubbing. The supercharger pulleys are reaching nearly 200 degrees F, spit on your finger and dab the pulley and it evaporates!
Are these aluminium pulleys causing this belt to melt and then snap?
I have a twin supercharged Lamborghini running M90's with large ports.
Specs are as follows:
4.5" crank pulley steel
2.5" Supercharger pulley Aluminium
Engine redlines @ 7500 RPM
3.0" alt pulley Aluminium
water pump pulley steel
idler pulley steel x 3
Car has been running great, zero belt slip & 4.5 psi boost, low boost i know, but you should see the port work on the motor, as well as a V12 doesn't help with these small blowers.
So, today i had a nice stretch of open road, flat footed it & took the car to 180 MPH top of 4th, shifted into 5th & coasted down to exit, when i come down to a slower speed of 40 mph, blue smoke was emitting from the engine cover, superchargers were quite, not good. Pulled into a gas station and there is the belt, just melted on the grooves, no signs of rubbing. The supercharger pulleys are reaching nearly 200 degrees F, spit on your finger and dab the pulley and it evaporates!
Are these aluminium pulleys causing this belt to melt and then snap?