twins or single ???

[WOT]

What is the compressor/exhaust housing size combination used on most twins? I have been thinking about a turbo (or twins) and one of my criteria is not to restrict exhaust flow. My goal is not huge power, but decent power (450 -500), towing, low lag, and mileage. The stock 9mm housing is just too restrictive for higher RPMs.



WOT

 

[JStieger]

Now you have the spacer in check to see if your wastegate actuator has the travel. Hit it with shop air to see if hitting the wastegate plate? I use to make a spacer for a 38mm gate i will see if i have here.

Stock Super B wastegate flappers would open maybe 1/3 of the way before hitting the cover.



I installed a ~1/2" wastegate cover spacer (bought from HTT) before putting these twins on and the flappers now open about 3/4 of the way.



I have room to fit a thicker spacer if you have one! Let me know if you do...



-Thanks-

 

[OPoole]

Does your flappers hit your cover now?

 

[JStieger]

Yes, they still do.