Tin Indian Performance Pontiac Crank Mandrel Drive System

Description

Our Pontiac Crank mandrel drives are custom CNC machined out of 6061 aluminum.  The mandrel includes the following features:

• Mandrel bolts directly to harmonic balancer –  You use your stock crank bolt to bolt your harmonic balancer to your crank.  You no longer need to use mandrel systems that use 5 to 6 inch balancer bolts.  Your balancer is now reliably retained by a separate bolt!  Some harmonic balancer manufactures will not warrantee their balancers if you use such a crank mandrel system.
• Works with ALL Pontiac harmonic balancers with standard BBC or Pontiac 4 bolt patterns AND crank triggers!
• Three 3/8 – coarse and three 3/8 -fine thread bolts are included with the kit
• Four 5/16 – coarse and and four 5/16 – fine thread bolts are included with the kit
• FULLY ADJUSTABLE!!  4 different locating spacers help with belt alignment.  We can also custom machine spacers for you based on your spacing requirements. – Email for details

The standard Pontiac crank mandrel drive system comes with the mandrel, 1 –  3 inch deep grove pulley, 4 alignment spacers, snout cap and bolt.  4 inch pulleys , gilmer pulleys, and additional spacer kits are also available separately.

Want to run the TIP crank mandrel drive system and retain your stock 1969 and up lower crank pulley?  YOU CAN!!!  Mandrel fits inside the stock pulley using the standard Pontiac 4 bolt pattern.

Mandrels measure approximately 5.150″ from the back mounting flange to the snout cap and the mandrel shaft is 1.5″ in diameter.

We can also custom machine one of our mandrels to fit inside a March crank pulley or we can custom machine any height / length mandrel as well.  Email for pricing and details!

 

Frequently asked questions:

Q:        Why don’t you guys sell a cheaper system with a Ford style smog pump?

A:         You get what you pay for!  The Ford style pumps don’t pull near the vacuum nor do they last as long as the Star Machine or Moroso units.

Q:        How fast should I spin the vacuum pump?

A:        Optimum speed is approximately 50% of the engine speed. (2 : 1 ratio).  For applications below 8,000 RPM we recommend running the pump at 66 % ( 1.6 : 1 ratio).  Using the 3 inch pulley provided with the standard Tin Indian Performance Crank Mandrel System will drive a vacuum pump with a 5 inch pulley at 60%.  The 4 inch mandrel pulley would drive the pump at 80%.

Q:        Where should I plum the vacuum pump?

A:         We recommend attaching the pump to the front of the valve cover via a threaded bung.  Our bung baffle helps with pulling excessive oil out as well.  This should provide you with the best vacuum and best lubrication of your pump.  The outlet of the pump should be attached to a catch can that can be periodically drained.  We do not recommend attaching your vacuum pump outlet to your dry sump tank or to an exhaust collector.

Q:        How much vacuum do I need?

A:        Most engine builders concur that maximum power gains are noticed in the 13” to 16” on a wet sump application.  Street applications should be less and we normally recommend that you drive the pump a bit slower and have it pop off at a lower max as well.