I bought an underdrive crank and alternator pulley and had a TERRIBLE voltage issue, my blazer is not a drag car and I need to it for a daily driver, so this simply won't do. The only way to help this issue is to get a smaller alternator pulley, which I had no luck finding one that fits perfectly. A higher output alternator would help the issue as well, which I do not have one.

I can't elaborate on performance gains for one big reason, I had a bad misfiring issue sneak up on me at the same time of installing these pulleys and I am having terrible engine performance because of it. But I hear underdrive pulleys DO work.

In any case, I will be taking the pulleys off, I simply need the electrical demand for daily driving.

If you need your blazer for a daily driver, underdrive pulleys aren't for you.

Hope this helps answer some questions for those of you that are not sure if underdrive pulleys are for you!

 

The new member area is for introductions only please.

**Moved to Engine & Transmission**