Belt Part #'s For Blitz Supercharger

[KMack]

Wait... what was that I read about replacing the Crank Pin? Is that common for this install, or just relegated to us xA owners? I have not read anything else on that. Any more insight on this?

(Sorry to bring this back to life just to thread hijack)

Ken

[Bluevitz-rs]

Originally Posted by KMack

Wait... what was that I read about replacing the Crank Pin? Is that common for this install, or just relegated to us xA owners? I have not read anything else on that. Any more insight on this?

(Sorry to bring this back to life just to thread hijack)

Ken

It's just because of the 1NZ/2NZ crank pulley design. It's only a taper fit, so there's a chance it can spin and sheer off the stock roll pin used from factory.

[CrankyOldMan]

Originally Posted by Bluevitz-rs

It's just because of the 1NZ/2NZ crank pulley design. It's only a taper fit, so there's a chance it can spin and sheer off the stock roll pin used from factory.

I'm not sure what you mean by taper fit. It's a snug fit over the end of the crank shaft, but it's not tapered that I can see. The bolt does most of the holding, and the pin is there to keep it from slipping up to the shear load of the pin. Upgrading pins is generally a poor engineering and maintenance strategy, because the whole point of a key or pin is that it is supposed to fail before the shaft/gear/pulley/etc. If you have to keep replacing pins, then something in the system is generating more torque than was intended. In the case of the Blitz S/C, the force of the clutch engaging causes a big jerk on the belt, which can shear off the crank pulley pin. As noted by BlownXA, putting a hardened pin in there will just slot the hole in the pulley, and eventually cause a different failure mode.