IS Slipping and is wearing out belts. This is the one from banzai racing. Is there a way to prevent this? I didn't want to get the belts super tight in fear that I would damage the water pump. Probably just run with one belt?

Or is there a better alternative?

 

You do not have it tensioned properly, install our Alternator Bracket Pulleys & Belts (86-91 RX-7)

 

You just need to make sure the deflection is about 1/2 inch or less when you push on it. Also
new belts will need to be retighten after a few hours of runtime. They will stretch a bit.

That Banzai adjustable bracket is slick!