more pulley swap questions

[hazmat404]

ok, i swear i looked back and did some research before putting this up but i guess i still dont have it all down. now i have a 2.8 blower pulley. im going to get a 4 piece idler pulley set. now the bracket needs to come with it too right? i just looked on the Billet Flow website and a smaller bracket comes with so im just curious. also, stock belt (well size at least) will work for this? i already have a predator so thats set. im just getting my final list because im finally going to take the jump for it

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[nytebyte]

BilletFlow has a belt sizing chart on their site.

You can match your pulley size and idler set to the size belt you need.

http://www.billetflow.com/IdlerBracket.htm

Scroll down near the bottom. It's the red text.

 

[hazmat404]

so for a 2.8 pulley I'd use the same as a 2.76 just cause it's so close?

Just wondering about the bracket and about how much and how long a tune usually takes

 

[blck10th]

I have the 2.76 and the new style snub ideler bracket. All from Billetflow.
this bracket just allows fo rthe extra ideler up top as seen in the pics on the website.
You use the stock size belt. 74.5.
Your supercharger pulley is only .06 larger. it will not matter. if anything it will make the belt minutely tighter.

my dyno tune lasted about 2 hrs.