How do you measure the pulley to be sure of what size it is?

1. Inside the grooves?
2. On top of the grooves?
3. ????

I know I should have either a 3.1 or 3.2 but can't figure out which it actually is...

Thanks,

Cory

 

6.0 LQ4 is a 3.1
6.0 LQ9 is a 3.3 (i believe)

 

I think you measure from the top of the grooves.

 

I think you just look on the face of the pully and read what size it is. It is stamped in the metal.

 

And Mr. Cairns is the winner! I read on another forum last night that the pulley size was stamped on the face of the pulley. This would probably seem fairly obvious to most of you because you see the front of your Radix... the H2 however has the pain in the *** clamshell hood. I have to climb up on the tire and put a knee on the battery to lean down over the radiator to see the damn thing. There it is plain as day!

Thanks

Cory

 

I didn't know that tid bit till I someone else pointed it out to me, so don't feel too bad

 

what did it say?

 

The "official" radix pulley has it stamped on the inside, but you won't find any stamped markings on either of my other pulleys.

 

"3.1 just like everyone told you, jackass!" I couldn't believe they actually stamped the word "jackass" but there it was plain as day

Cory

 

That must be how I got a 3.1 pulley on mine... The guys who installed the Radix on my SS did a lot of H2s, so they must have mixed up when the installed mine. Not that I am complaining