Revisiting the underdrive pully topic for fresh info.

[Stroked & Blown]

Do any of the kits come with tools to help with installation? I've seen some rigged-up tools to keep the pulley aligned during removal/installation.

I believe all of the UD pulleys require a boss on the block to be trimmed off, due to the location being inside the stock pulley diameter. If there is an option that doesn't require this to be cut off but still has decent UD, I'd be interested in looking at it - anyone know if this exists?

[AndyA6]

Originally Posted by Stroked & Blown

Do any of the kits come with tools to help with installation? I've seen some rigged-up tools to keep the pulley aligned during removal/installation.

I believe all of the UD pulleys require a boss on the block to be trimmed off, due to the location being inside the stock pulley diameter. If there is an option that doesn't require this to be cut off but still has decent UD, I'd be interested in looking at it - anyone know if this exists?

I have te RSS UDP, it came with the installation tool. My understanding is that the boss has to come off with any of the UDPs. I tried my Dremel but that was slow so I took a saw. One note, get the right wrench to loosen the the bolt, that was the hardest part, lots of elbow grease needed!
Also, I reused the original belt it was in great shape and it works just fine. Eventually I will replace the belt with a slightly shorter one once due.
So far no ill effects whatsoever! There is def some gains, and as mentioned a million times best bang buck mod.

Later,
Andy

[ProjectM96]

Hello. I recently bought an RSS under drive pulley. Kept buying stronger tools with more leverage but I cannot get the old pulley off. Bolt is too tight.

Any help or DIY guides on that?

The RRS UDP came with that tool, but I do not know how to use that tool or why that tool is needed.

What do you guys mean when you say boss or block? And what do you mean when you say it is hard to align the pulley?

I thought all I had to do is remove the bolt holding the old pulley, pull it out, and insert the new pulley+belt.