Underdrive question

[Grifter]

Can someone with underdrive pullies do me a favor?
measure the diameter of your pullies and let me know. I am thinking that maybe my car already has them on it.

[Smokie]

Don't have them any more, but here is an easy check, if you have U/D pulley your water pump pulley won't be OEM, it will be larger and slotted instead of solid.

[fastblackmerc]

+1... What ^^^^ he said.

[Grifter]

define larger and slotted? i dont see how my pulley could be any larger. it almost touches the crank pulley right now.
does anyone have a pic of either a stock or underdrive water pump pulley?

[fastblackmerc]

define larger and slotted? i dont see how my pulley could be any larger. it almost touches the crank pulley right now.
does anyone have a pic of either a stock or underdrive water pump pulley?

I'll take some pics tomorrow.

[RoyLPita]

Steeda underdrive pullies should look like this:
http://www.grandmarq.net/vb/attachment.php?attachmentid=37 82&d=1165833911
http://www.grandmarq.net/vb/attachment.php?attachmentid=37 81&d=1165833911

These are pics of NATEHAWK's MM from another site.

[fastblackmerc]

I stock pulley also has a flange on it.

[Grifter]

Thank you!
I definitely dont have underdrives then. I have a large crank, and a large water pump pulley. I havent seen a water pump pulley that looks like mine stock, so i was wondering.. all the other wp pulleys i have seen look like a black metal bowl, like fastblackmerc said, this has a 'flange' to it.