3.4" pulley install

i dont have one yet but i was curious if anyone could give me like a write up on how to remove the old pulley. tools needed how to put the new one so on.. basicaly how to put on a new pulley and whats required.
i heard from someone you need a smaller belt if im going from the stock 3.8 to the 3.4 is this true or can i just move the tensioner.

also does anyone have a 3.4" pulley i could buy from them. im looking to get one for my 98 grand prix. i only have an intake on but i think itll be ok.

This guide from Pulley Boys should give you an idea on the work and tool (puller) required:

http://www.pulleyboys.com/swap.html


No matter what size pulley you use get a Goodyear Gatorback SC drive belt. Here is a guide:

- 4060660 belt = 3.25” - 3.4” pulleys
- 4060650 belt = 2.9” - 3.1” pulleys
- 4060642 belt = 2.7” - 2.85” pulleys

4060660 Belt - 66.0" long
4060650 Belt - 65.0" long
4060642 Belt - 64.2" long

Good luck!

This guide from Pulley Boys should give you an idea on the work and tool (puller) required:

http://www.pulleyboys.com/swap.html


No matter what size pulley you use get a Goodyear Gatorback SC drive belt. Here is a guide:

- 4060660 belt = 3.25” - 3.4” pulleys
- 4060650 belt = 2.9” - 3.1” pulleys
- 4060642 belt = 2.7” - 2.85” pulleys

4060660 Belt - 66.0" long
4060650 Belt - 65.0" long
4060642 Belt - 64.2" long

Good luck!


whats so great and big about the gatorback belt. what makes it different from just the regualr belt or competition blets?

whats so great and big about the gatorback belt. what makes it different from just the regualr belt or competition blets?


Speaking from experience because it is the best....period and at a reasonable cost. Quiet and minimizes any possible pulley slippage whereby maximizing boost.

But the choice is yours.

Yea i think i'm about to do the same thing but i'm a little worried about hurting my engine with the added power... idk what to do...

Yea i think i'm about to do the same thing but i'm a little worried about hurting my engine with the added power... idk what to do...

It is a decision you have to carefully weigh. The 3800 is a very resilient engine. It would take more than a 3.4 pulley mod to hurt it. The tranny is the biggest concern of most GTP owners. However, according to GM and ZZPerformance the 4T65E-HD is good for continuous mid 13 second runs. I still have my original tranny including engine and supercharger over a period of 8 years of ownership and the last 3 years out at the dragstrip. I finished 2005 with a best 1/4 mile ET of 13.2 @ 104 mph. But I will have to consider adding an oil cooler this year due to additional mods.