My mods are listed below. When the car is cold i have a cricket sound, I believe its one of the idler pulleys. Not sure which one, tried to narrow down and could not figure out which one, so I want to replace all of them. Can anyone help me with the pulley sizes? thank you for the help.

 

I had the same problem ~1,500 miles after installing the E-force and swapping the belt fixed the problem. Not sure what belt came with your kit, but Edelbrock recommended a Gaterback. I checked Brenspeed's site and it looks like you should have the 3.5 inch pulley. If that's the case, you will need Goodyear Gatorback P/N: 4061025.
I also upgraded the tensioner about the same time and not had a problem since with another couple thousand miles logged on the car.

 

Doogie is right. Seems like the only belt that won't chirp (eventually) with the eforce is the gatorback

 

I am running the 3.25 pulley. Do you know what size belt I'll need?
thank you

 

I ran the 3.25 before and used the same belt - 102.5. The tensioner took up the slack ok. Later I did replace the tensioner at some point with a thumprrr and 90mm pulley. My stang came with a 90mm tensioner pulley to begin with. Some other years may have a 76mm.

 

Thanks for the help, I am going to upgrade the tensioner and replace belt with gator back.

 

+1 on the chirping usually being the belt. They'll stretch pretty quickly, too.

(I have a thumprr tensioner for a 4.6l for sale...pm if interested, as it's not listed here yet)

 

Bringing this thread back from the dead.

I've had a squealing noise that I thought was the power steering pump. But upon taking it to my mechanics, they stripped the belt off, and believe it is the two idler pulleys on the driver's side of the vehicle because they "turn roughly". have you guys had any experience with this? Or believe it is the belt?

Thanks!

 

What brand belt comes with the eforce?

 

Can't remember what brand came with the kit from brenspeed but I did try a Dayco and it started chirping eventually also. Only one that didn't chirp, and still hasn't (10,000+ miles later), is the gatorback