I'm not even sure how you did that with the pulley...either way after my swap I noticed about 1/2# boost increase.

 

more than likely from the tighter belt

I did not do that mod, that is on a Modular Mustang motor.

 

thanks for all the help guys. i still need to do a couple things to make this right... havent driven the truck much...
1 - pin crank
2 - grind the small spot from the alt bracket so the idler bracket sits flush
3 - possibly lose the pulleys.

 

Definatley pin that crank

 

DOIT!

 

I'm the poster child for CRANK pinning/keying! On this RUN, the crank pulley spun, loosening the bolt. I only made the one run then started my 70 mile drive home...about half way home it started overheating. I pulled over to take a look and everything "appeared" to be working...at idle, the belt was turning, and my electric fans were on. I figured the thermostat must've stuck closed or open. I turned it off, checked the tension of the belt...felt fine, so I waited til it cooled down and started on my way again. Another 5 miles and it was over heating. This time I noticed that the crank pulley was canted up a bit, with the belt still in place. I crawled under and reached inside...the bolt was so loose I turned it by hand less than 3 revolutions and it dropped out!

Bottom line: The oil pan filled with metal filings and I lost an engine due to NOT pinning/keying the crank. The kicker is my engine builder asked me if I wanted him to key the pulley & crank, and I said no thanks! Obviously, that was before I had read anything about these troubles.

PIN IT! lol

 

damn bro, that's a big kick in the nuts

 

bump! im still getting alot of belt dust and now my belt is squeaking again. put a little water onto the belt and it goes away.

 

por favor!?

 

You may need to space the idlers out that have the shoulders on them. Look at the alignment of the belt and make sure that the belt is riding in the middle of the idlers. If the belt touches the shoulders on the idlers it will squeak.