Understood. I have a 347 boss block, afr heads. I'm only running about 8lbs of boost right now. I think it dyno'd at 500 something at that boost level. I really don't have any complaints but I'm getting close to it being "done" (at the bodyshop now) and I'm not sure I'm ready for that. So I'm looking for things to upgrade. Ha!Need to know what your combo is and what your goals are...If you are looking for a marked power improvement and your motor/block can handle it, a properly sized Turbonetics or Precision 76mm turbo will run circles around your On3 76mm for sure! I ran 8.80s with a single Precision 76mm on a 331 ci SBF at 3400 lb race weight and full exhaust with tailpipes. I highly doubt the On3 turbo would have even come close. If you are not looking for a big power increase, spending the money on a better turbo may not be worth it. You may be able to pick up some power just by changing your exhaust housing AR...for example jumping up from a .68 to a .81 or a .96 could give you more peak horsepower, but at the cost of bottom end torque and a bit more lag.
I don't know what On3 did before. So the current On3 turbos are from MP?My turbo is the upgraded MP branded unit. I'd like a BW, but don't have the budget with my Lightning buildI thought on3 used master power turbos back in the day then went to the direct brazilian manufacturer?
I myself prefer my borg warners, authentic that is no knock offs as mentioned.