Single or Twin turbo setup for 360?

rumblefish360 said
When I said, large turbo, I’m thinking a drag race car sized.
You can go to large. Correct?
A properly size turbo would provide boost when you need it and not to early or late. This would be early by compare. Correct?

No, it’s the internet spending money in which I did not agree with but choose the path of less money. Since you can throw money like the USA give rent at a problem, real or not, we’ll great for you. Does the OP?

There is no argument from me that bigger is better and a great way to go. But do so tell me the cost of a fully rebuilt engine of your thinking. Does the app have this kind of money?

Not IMO. I can see a plus to it. Though I’d rather not need to rev it up into the great boost area needed to tow something.

That’s great! GOOD! For you. Spend that money wisely!
Does the OP intend or have the money for your fool proof plan.
Is the OP a novice at tuning?
Conservative tuning would be the start of all tuning. No doubt.
Knowing cast pistons are behind forged is a no brainer. When you wrote what you did, it seems like you have no faith in them. Break a few?

If the OP doesn’t have the money for forged pistons he shouldn’t be considering a boosted towing application. I wasn’t assuming his skill level, he admittedly said “Help out a lost guy because I've always been an N/A engine type of guy and the land of boost is foreign to me.” This most likely means tuning a forced induction engine as well. Turbo sizing is much more than “too big” or “too small”, read and understand a few compressor maps and you’ll understand that. You do not want boost early in this application, you want to be able to drive in light load situations off boost and have the power when you need it, so no not “early by compare”, later is better. So sizing larger than you would for a street car application is important. A 360 with 70mm turbo might be right in the 70% efficient zone in a 3000lb dart but put it in a 4500lb truck with a trailer behind it and all of the sudden it’s in surge. Defining a turbo by “race car sized” is ridiculous. That same 70mm turbo on a k series Honda might be appropriate if you were racing it.