does a 3.4 pully require a smaller belt?

**00Daytona** · 04-12-2014

I bought the stock replacement one and put it on and the car feels much slower. I figured the tensioner would take up the slack am I wrong? Also its squealing off and on

**indygrandprix** · 04-12-2014

It requires a larger belt, you have less power and squealing cuz it's slipping because the tensioner isn't pulled back far enough to apply enough pressure

**l67ss** · 04-12-2014

Smaller belt

**ericspecullaas** · 04-12-2014

i know there is a belt chart on here in one of the stickys

**CTKGP09** · 04-12-2014

I threw the stock belt back on and had no issues on a 3.4...if you don't have belt slip I wouldn't worry about it but every car is different...the safely modding thread I believe has the size chart

**Iceman6669** · 04-12-2014

I believe I run the stock size with my 3.4

**coolone** · 04-13-2014

Let us examine this shall we? Pulley is .4" smaller diameter, power is lost, and belt is making noise...

And the question is should I use a smaller belt?

I'll just leave that there...

**smoke14** · 04-13-2014

667 - GTP/GS/SS supercharged with stock 3.8" pulley (67 1/4" -1708mm)
658 - GTP/GS/SS supercharged with 3.2 - 3.5" pulley (66 3/8" - 1687mm)
650 - GTP/GS/SS supercharged with 2.9 - 3.1" pulley
645 - GTP/GS/SS supercharged with 2.6 - 2.8" pulley
716 - Bonneville SSEi with a 3.4" pulley
721 - Bonneville SSEi with stock supercharger pulley (72 5/8" 1845mm)

Taken straight from http://www.grandprixforums.net/threa...ding-Your-3800!