Originally Posted by BrianBrave
Six-of-one -- half-a-dozen of the other.
Installing a new pulley on my electrically clutched supercharger that only provides 7HP in gains - - is just not worth the cost or the risk. Not saying it's a bad product - just not enough gains for the price and possibility of damaging my SC.
The largest crank pulley (185mm) increases the other pulley ratios (except the WP and Idler) by 20%. So you really only begin to overdrive them VS a stock crank pulley when your driving above 5K RPM. Your usually in the "sport" mode of driving at those RPM's - during normal driving there really is no issue. Example: 2,500 RPM with a 185mm is the same as 2,000 RPM with a stock crank pulley. No big deal.
That's well worth the risk and cost for the potential gains in PSI - - IMO.
A proper bearing will solve one issue, unfortunately the WP had to be reduced in size to clear the larger pulley. I've had to replace failed WP on my stock truck, so if I have to replace the WP on my SRT6 a little sooner as a cost of more performace -- OK.
I missed this when I read it first, can you explain what you mean? Do you mean the opposite of how it reads?
Smaller pulleys spin faster, that would include the WP and the Idler.
All pulleys will spin faster at a given rpm using a 185mm over the stock pulley, making them smaller makes them spin even faster.
I see you are thinking of using the Stainless Steel bearing .... I see how you get the name Brian
Brave.
I have one word for you ....
Don't
I think my opinions are falling on deaf ears anyway, they are sound though and based on some research on the web and books etc. The trouble is that they see 20,000 rpm and are seduced by it. Load for load this S.Stl. bearing rates lower than the stock 6303 bearing. At the most optimistic it is no better than the stock bearing at worst it will fail much much sooner and when it fails there will be no warning at all.