The truck pulley is 7 1/2'' at the surface where the belt rides..

4.8, 5.3, 6.0 all the same.. Part #12576652

 

How does one go about getting a bigger crank pulley? There are a ton SC owners out there that would be all over this. Who makes the 1ft and 2ft () pulleys for the L? Is ASP going to mass produce these, because I'm sure they could make a killing if they did.

 

talked to ASP today, they said an 8" pulley would be $250 and 3 weeks if you supply the stock pulley.

 

Damn, that's some serious coin! How much of a boost increase would that give you, that's only a 1/4" increase?!? That can't be worth all that much.

 

its a 1/2" increase, I think around 3psi +/-

 

Oh yeah, sorry that was a typo.

So as a Radix owner, do you think that's worth it? It beats putting a smaller pulley on up top, but the price is more than double. I'm sure it would come down a bit if they mass produced them though. Maybe B will chime in with some R & D insight that Magna has done.

Is it possible to boost lets say a 5.3 to +12psi w/o using a crank pulley, and w/o running the risk of a slipping belt (i.e. no roller skate wheel pulleys)???

 

good questions, not sure, I've heard many differing opinions, Brian will probably say its not needed

 

The bigger crank pulley would reduce belt slipage,but it would increase the speed of the alternator,waterpump and power steering.

 

Yep....and the increase the amount of wear on all of the above.

 

Have you guys done any testing with a bigger crank pulley? Is it worth all the fuss?