429idi
Full Access Member
i have 2 tdo4 turbos and by looking at them i couldnt see how 2 of them would be the right size for a 7.3. the turbos i have are off my 92 mitz 3000gt vr4. i also have 2 tdo5h turbos from 1st gen eclipses. i got the tdo5h turbos for the 3000gt, but have thought about a real twin turbo system for my 7.3. the real reason for a twin turbo system is so you have more usable boost throughout the rpm range then a bigger turbo that only boosts at higher rpm, or a turbo that boosts well low to midrange and over spins at high rpm.
There are different size tdo4 turbos, some can flow 30lbs/min. A baby h1c holset will will only do 35. hx35 will do 52. You would need to find a turbo map that would work for your engine.
The gassers rev twice as high as us, so the turbos we use are a lot smaller. A 7.3 gas motor would need a way bigger turbo than a 7.3 diesel. Like I have said before, usually twin turbos are used for large displacement v8 engines making 1200hp. Compound turbos are usually used to get more boost because you aren't limited to the pressure ratio of the one turbo.