Police:

Ryan Dunn

Crashed at 130 MPH

6/21/2011 4:00 PM PDT BY TMZ STAFF
Ryan Dunn was doing 130 miles-per-hour in his Porsche at the time of the horrible crash that killed the "Jackass" star and his passenger -- this according to West Goshen police.

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Police Chief Michael Carroll told reporters an accident reconstruction team determined the speed of the crash after inspecting the accident scene. Officials say Dunn's car collided with a guardrail at high speed, crashed in the woods and burst into flames.

According to Carroll, the crash was catastrophic -- claiming he's "never seen a car destroyed in an automobile accident the way this car was ... even before it caught on fire."

Carroll called the accident the "worst" he's ever seen ... by far.