The SRZ

What's up? Getting ready to make the plunge on a gz setup and I see you are running an UD pulley on your setup. What size is that pulley and is it a March? Do you happen to know the part number? I'm gonna have to go a similiar route as your setup minus your custom bracket for the pump. Thanks for any help.

Silas,

mzgp5x

I use the 5.5 inch PD pulley (V-belt type) from the GZMS web store. I also used the GZMS " SB chevy crank pulley. I had to mod the crank drive slightly for my app. I do not know how you are going to mount the GZ pump other than how I approached the solution keeping all the stock acc drive component location.

The 5.5" pulley to 2" drive is good for street applications for 1/3 atm vac. I followed the GZMS reccomendation on their site.
I also looked @ the surpintine drive, but an 8" pulley was very large and I could not package this drive into the engine bay.

The GZ pump I have is a VP103. They don't make that anymore, but, GZ said a VP104N has the same fitting location and pump body. Fittings are on the sides, not on the rear/ front.

What kind of vac regulator will you use?

Good luck with your app. B.

The SRZ

Thanks for the info! Going to be using Ralls custom bracket using the stock accessory bracket. The 5.5" UD pulley along w/ the pulley on the GZ VP101A will do the trick. I'll be using the Star machine regulator.

You aren't running a single groove UD pulley are you? All I see on their website with your reference is the CP100A.

mzgp5x

The pulley is a single "A" section V-belt. Not a surpentine type 6 or 8 groove. Drive is directly off the crankshaft. B.

The SRZ

So CP100A is the right part number? I'll have to call them monday and see what they've got.