I just put on my metco idler bracket with my KB and a 2.8 pulley.

First with out the idler bracket it made 15 # of boost at full throttle(slipping) ,with the idler it makes 17# of boost at 3/4 throttle.

WOW ! I believe it would have gone to 18or19 at full throttle. I didn't find out because of the stock bottom end, stock fuel pumps, and a MAF @4.98 V

Can't wait to get everything in to support the new power. But until then I am using a feather foot!

 

Only cause you want to hear it
It's not crazy

Sounds sweet, been thinkin about getting those idlers myself cause even a new belt starts to squeal just before it shifts. also worried with my stock bottomend and stock fuel,pumps, injectors, etc. and I only make 14lbs boost