Throws Belt

[dennyG]

HELP!!!! DLI/B&M 177 on Mopar 383/484hyd. cam.850 Holley

Drove car for first time Thursday and stomped on it a few brief times and except for some tuning issues went OK.
Fri. night installed boost and fuel gauges so I could get serious.
Now as soon as you nail the throttle it throws the belt!!!!:angry:
Put it back on,crack the throttle,off it goes:shocked:
The idler/tensioner pulley gets warm but the bearing is free and smooth.

The belt is probably the original to the kit from Dick Landy Industries late 90`s at best even tho it had been used vey little.

Alignment is very good on everything,but there is some run-out on the crank pulley.

Also what is the trick to getting the belt on and off?
I have to wind it on and off by barring the engine since the tensioner is bottomed out before the ribs clear a groove?

One more thing: I got about 5lbs of boost just by nailing it in neutral ,
Is that supposed to happen?
Is that my belt problem too?

[dennyG]

Fixed. Belt was set too tight. Getting new belt anyway.

Blower still LOUD. Sounds like 4cyl open exhaust engine braking at high RPM.
Only when its floored tho.