New TAPP Secondary

[Upstater57]

The diameter of this new clutch reminds me of the bearcat secondary we used to run on our old Tcats. That required a longer belt. TAPP will need to get a proper belt length figured out before he sells these for 998's. As I remember the old days, the larger diameter secondary acted like a shorter gear off the line with ice picks making the sled a little quicker and offered the opportunity to use a steeper helix like a 60/40. However, without good traction, it made little to no difference. With that said, we all know the 998 is a different animal. Looks like it has adjustability. It will be interesting to see how this unit operates. That might make it worth looking at.

 

[Turboflash]

How much of the larger diameter will primary be able to use?
If one wants to use the larger diameter (using a longer belt), and if primary can't shift far enough, you end up with a ratio that is lower (less top speed) up top.

 

[Dave Forsyth]

Note this is always TAPP primary 8.4" Roller spider that when used sidewinder is 300 HP and using TAPP button and same setup it will pull down RPM by approx. 600RPM because of efficiency. TAPP secondary has been designed to be the most back shift or torque sensing & efficiency of HP transfer we can get. Yes longer belt was used by Maxceration with 11.4" secondary.

 

[Turboflash]

Note this is always TAPP primary 8.4" Roller spider that when used sidewinder is 300 HP and using TAPP button and same setup it will pull down RPM by approx. 600RPM because of efficiency. TAPP secondary has been designed to be the most back shift or torque sensing & efficiency of HP transfer we can get. Yes longer belt was used by Maxceration with 11.4" secondary.

Ok, makes sense now. Must use Tapp primary to be able to utilize additional diameter of this secondary. Got it.