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Interesting write up about roots & twinscrew superchargers by Kenne Bell

Will L.

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That’s a good explanation of the difference.
Roots are just engrained because we used to be able to go get a worn roots blower from any diesel junkyard for a half days labor. Rebuild it with upgraded bearings and a couple custom plates and BLAMO! A blower has now become a supercharger. So tons of guys everywhere could diy big power affordably (kind of).

Twin screws are purpose built and didn’t come along till long after. Never seen a twin screw in a junkyard. More power but more money.

The last decade has seen a change in the production cost lowering on twin screws and no more dirt cheap supply of junkyard blowers. When they are there, the price is high.
If buying new- definitely twin screw if you can afford it.

The 6.5 supercharger- Roots design. Why? Cost. You could have a twin screw built for it, but would be cheaper to bolt in L5P.
 

FellowTraveler

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Nature Coast
That’s a good explanation of the difference.
Roots are just engrained because we used to be able to go get a worn roots blower from any diesel junkyard for a half days labor. Rebuild it with upgraded bearings and a couple custom plates and BLAMO! A blower has now become a supercharger. So tons of guys everywhere could diy big power affordably (kind of).

Twin screws are purpose built and didn’t come along till long after. Never seen a twin screw in a junkyard. More power but more money.

The last decade has seen a change in the production cost lowering on twin screws and no more dirt cheap supply of junkyard blowers. When they are there, the price is high.
If buying new- definitely twin screw if you can afford it.

The 6.5 supercharger- Roots design. Why? Cost. You could have a twin screw built for it, but would be cheaper to bolt in L5P.
Scour the bay & CL there are there at good prices.......
 
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