JGTurbo
Well-known member
Here's some pictures of the wastegate modification. The turbo is off a diesel engine and it came with a .75" diameter wastegate. This seemed quite small for our application, so I bored it to 1.25" and am using a 1.5" exhaust valve for the new flap. Should flow plenty now!
Stock wastegate flap compared to 1.5" valve:
Stock wastegate in housing:
New wastegate port w/o valve:
Valve sitting in newly machined wastegate port:
Stock wastegate flap compared to 1.5" valve:
Stock wastegate in housing:
New wastegate port w/o valve:
Valve sitting in newly machined wastegate port: