Alternator Pullys

Did you try March Pulleys? Summit Racing sells them. They used to make custom sizes years ago, but I don't know if they still do. Here's their web site:

http://www.marchperf.com/

Michael

You can solve the pulley problem.

But can you solve the increased space requirements for the wider belt?

Larry

I've seen Pantera's running a full serpentine belt system, so it can certainly be done. Michael pointed the right direction as March do a Serpentine conversion kit for the 351C, they may even do underdrive (smaller crank puley) or overdrive (larger crank pulley) options.

I hate to question one's approach, but why do you need such a huge alt? You really need some serious load to require 200amps. Otherwise you give up HP just trying to spin the thing underload.

With a Winsor I was able to run double V-belts. Tooks some mixing and matching of various components. Perhaps the hardest part was finding a double pulley for the alternator. Most are single groove.

The only down side of the posted pic, is that the belt wrap on the alt is about 25%. In a later version, I dumped the A/C compressor to get closer to 50% belt contact around the alt pulley. You will need more contact to assure the transmission of torque. I am running a much smaller alternator so it is not about torque. I did this for extra protection from losing the one belt that runs the H20 pump and Alt.

I hope the ideas help.

quote:

Originally posted by Cyboman:
Did you try March Pulleys? Summit Racing sells them. They used to make custom sizes years ago, but I don't know if they still do. Here's their web site:

http://www.marchperf.com/

Michael

Thanks Michael, that will give me a place to start.

I can continue to run it on engine stand with Vbelt so I got time to play with it.

Thanks, I am not running the A/C so that should help.

To answer you question of why; A friend here does custom audio here in town. I could care less about his custom audio stuff but I respect the work he does.

We sat down and looked at amp requirements. They work with and dyno alternators like we do engines. It's not uncommon for them to build an alternator over 600amps (last one he did was 800 when they maxed out the dyno). They flow enough air to blow out windows with the speakers.

I always smile and tell him that's no the sound I am interested in, my music comes from the exhaust pipes! He smiles.

I have a fair amount of electrical on this car and we sat down and mapped out the current needs of everything such as:

2-Radiator fans
Oil cooler fan
Trans cooler fan
Electric Power Steering Pump,
electric fuel pumps,
headlights,
Possibility of fuel injection in the future
Maybe a radio
and a few other things.


My goal was to buy one alternator, not one from time to time. It has actually been delayed. They got a bad batch of brushes and it did not dyno correctly. They put the alternator on hold till they got a good batch in. They had to recall some that went out the door. I wonder how many times these end up on shelves only to be troubleshooted a year or two down the road; their company or other.

Did you make those pulleys yourself or did you find them that way?

quote:

Originally posted by ROVERLTD:
I hate to question one's approach, but why do you need such a huge alt? You really need some serious load to require 200amps. Otherwise you give up HP just trying to spin the thing underload.

With a Winsor I was able to run double V-belts. Tooks some mixing and matching of various components. Perhaps the hardest part was finding a double pulley for the alternator. Most are single groove.

The only down side of the posted pic, is that the belt wrap on the alt is about 25%. In a later version, I dumped the A/C compressor to get closer to 50% belt contact around the alt pulley. You will need more contact to assure the transmission of torque. I am running a much smaller alternator so it is not about torque. I did this for extra protection from losing the one belt that runs the H20 pump and Alt.

I hope the ideas help.

The H20 pump pulley was from Ford Motorsport. The Crank pulley from March using spacers from Ford Motorsport. Ford has spacers of various thickness to get the crank pulley spaced properly.

quote:

Originally posted by ROVERLTD:
The H20 pump pulley was from Ford Motorsport. The Crank pulley from March using spacers from Ford Motorsport. Ford has spacers of various thickness to get the crank pulley spaced properly.

Excellent, With this 400 I will need a little work to get the crank and water pump pulleys to align. Right now for test runs I have spacers behind the crank pulley. I will get these 2 lined up then I am going to mount the alternator where the A/C was at the right depth.

You can also try these guys. they helped me out with some of the harder to find stuff. http://www.jonesracingproducts.com/

Blaine

Thanks Blaine!

G