Greetings,
I'm doing a bit of math and was wondering if anyone has the size of the stock crank pulley for the 5.0 S/C?
I found the info for the 6 cylinder, it may be the same...unknown to me.
Also, does anyone have the size of the aftermarket crank pulleys that are sold?


Thank you, I appreciate any help.

 

The V8 and V6 supercharger crank pulleys are the exact same pulley and therefore the same size.
Coz the V6 is based on the V8.
Sorry I can't help you with the exact size of the pulley (diameter) but it is around here somewhere most likely in the F-Type forum.
I vaguely recall a mention of the after-market crank pulley (such as from VAP or Eurotoys) being 12% larger diameter than the stock pulley.

 

Thanks OzXFR. I have the v6 info, guess I'll have to math it a little more to.get the aftermarket sizes. Lol

 

Hey there GoFaster,

I've started a thread and searched around for this info as well.
Could you share the specs on the pulley with me please.
I know a guy that works at a machine shop and he can fabricate a pulley to my specs.

Thanks

 

from memory so may be a bit off
Eurotoys lower is 170MM, claim 11.6% increase I believe.
Velocity 11.8% (didnt get exact diameter)
Paramount is 174mm I believe and 15%
Stock is 152mm.
I went with Eurotoys (mike is great to deal with) and a Griptec upper for a much larger variety of pulleys and much easier to remove.

 

Excellent, thanks.
I'm going to dig a little deeper.
Maybe pull out my pulley, measure it draw it up on AutoCAD and increase it by 12% +/- and have it fabricated.
If I get this done, I'll share my results.

 

So just be aware (and you probably already know this) but the tune will be the deciding factor on your boost limits and gains. (A zillion other parameters apparently included in the tune to make more safe power...not just more boost) Example, I got a tune and small upper pulley, the increases were incredible, I added a lower pulley, bigger pump, and a add on auxillary intercooler radiator and fan and it gained "Zero"...like none....same times and same trap speeds . Now that will be corrected through the tune parameters and knowledge of my tuner. I happen to be out of pocket for a couple of months, but will update on the benefits of the adjusted tune when I can get back to my car.

 

Sounds about right.
I'm not going any further than the lower crank pulley and the tune, but with the pulley installed, I'll take it to a local tune shop, which I've spoken to already about my plans, and they can tune it to suit, live.

 

I would like to do it live as well, but my guy lives in Cali.... and I'm in Tennessee...... bit of a drive...lol
But I track data and send it for his perusal.