Why are there so few blown small blocks?

I can tell you some of the issues. E number one reason is it's a ***** to make them hook. It's one thing to look cool, but it's retarded to get your wallet raped by a car that has much less power.

The roots blower isn't obsolete. Far from it. It's harder to tune, harder to hook, less forgiving and makes an assload of low speed torque. They also get less efficient as RPM goes up, and RPM lowers ET. Always.

You have to have the chassis dead nuts on, or it won't hook. Down on power? You shake your teeth out.

For the street, even with better than 400 inches anything bigger than a 6-71 and you turn it too slow and it just gets in the way. Speed it up and you've got too much boost.

I'd do a Pro Charger long before a roots deal or turbo. I personally hate the exhaust work for turbos with a passion. And yes, I've worked with and on all of them.

Personally, I'm an N/A guy. Always will be.