Re: stock wastegate in compound set-up
If I have to replace the stock turbo, it will be with an S300 feeding an S400. I can get really good prices on Borg Warner products and I know the combo works well on cummins motors. The big thing is that this will be a very mild set of compounds for towing, not all out power. I believe that the stock turbo can be used as the secondary, I may just try it using the stock gate and add an external later if necessary.
2005 Chevy 3500 crew cab dually allison auto.
2007 dodge 3500 QC dually 5.9 cummins, 6-spd.