D1SC users: how easy is it to spin the pulley by hand?

[Erich]

Sounds like a strange question but I notice a big difference between my D1SC and my old P600B.
With the D1SC if you give the pulley a spin by hand, it will almost immediately stop. You cant even get half a rotation out of it.
With the ole P600B, you can get a few full rotations out from one spin.
Erich

 

[01yellercobra]

Never really paid attention to how many times it spins. But probably a turn or so.

 

[Black*Death]

I think the free spinning is a bad thing? I have seen videos of bearings gone in Vortechs. What does it sound like when you spin it? Assuming you bought the D1 used?

 

[01yellercobra]

Yeah, I bought it used back in 06. It sounds like gears meshing when I spin it by hand. The sound really hasn't changed at idle that I can remember.

 

[Erich]

I got mine new. It has 50K on it now but it has always been the same. I guess the SCs have to slog thru oil. My car (with the blower bypassed) just "ripped off" a 21 mpg on my commute (mixed highway, country roads, bumper to bumper). That is a record for sure. Normally I get around 17 with a record of 18.
Erich

 

[01yellercobra]

I seem to be limited to 20mpg on the freeway. I get 12-14 around town.

 

[99cobra09]

My procharger P1 turns easy about 3/4 of a turn its always been like that and have no problems.

 

[SVT5.4L]

if it spins freely then its probably not compressing air... correct? i have no experience with centri blowers but i'd imagine it should be somewhat difficult to turn by hand

 

[mtrsprt]

It's because of step up ratio's. They ARE different.

P600 is 3.05:1
D1-SC 4.10:1