More pictures up, click on previous picture link now for series of photo's

any chance of a picture from a front on angle?

Bump

Price dropped to get rid of remainder - $160 plus $10 postage, selling below recovery cost as I still have 5.

5 left.

Reason for billet is $$$$, lighter material that would work, you could probably add a 1 to the start of the price.

There is quite a weight saving over the std pulley but the main idea of it is as an 'underdrive' pulley and the benefits gained from that.

Pic's of pulleys, try this:-

http://www.facebook.com/photo.php?fbi ... 2866006837&type=1&theater

Hello Sam,

Just curious to ask why you went with billet steel? Is there a lighter metal option that is strong enough for the job?

You should upload some pictures here. Can't see them facebook ones.

Previous thread discussing underdrive crank pulleys is here:

http://datsun1200.com/modules/newbb/v ... id=367435#forumpost367435

I Have just had 10 A series underdrive pulleys made up and have 7 up for grabs.

They are 3.5 inch o/d (89mm) and weigh approx 580 grams and are billet steel.

Pictures here:

http://www.facebook.com/photo.php?fbi ... 2866006837&type=1&theater

Why an underdrive crank pulley -
Think of it this way, underdrive means to slow down. Underdrive crank pulleys are designed to slow down engine accessories and reduce parasitic loss.
Crank pulleys, attached to the outside of the crankshaft, are the source of power for a car's accessories. The alternator and water pump are belt driven units, attached to the crank pulley, that use horsepower from an engine to provide their own services. This draw of power by these accessories is called parasitic loss. Underdrive crank pulleys increase an engine's throttle response and horsepower by reducing the power required to drive these external accessories. By replacing factory pulleys with smaller diameter units, the accessories are slowed enough so that their performance does not suffer, but just enough so that more horsepower is sent to the wheels and put to the ground and also benefit from increased accessory life in high revving engines and also deliver better fuel economy.

Price is $225.00 plus $10 express postage.
PM me if interested.

Price dropped to $160 plus $10 postage

Cheers, Sam