[bjmsam]

Originally Posted by moffman93'

I would never spend any money on a turbo that came stock in some parts of the world(13g) .

I would never spend any money on a turbo that I didn't research and attempt to understand enough to determine whether it is appropriate for my needs. The 13Gs that came stock on European 3000GTs had the smaller TD04 turbine. Incidentally, I wonder if there is any truth to this statement (again, with the TD04 turbine): "The only 3000gt that ever had an 11g is a GTO MR in JAPAN."

Originally Posted by moffman93'

more power potential

There is no question that a larger compressor has more power potential when running outside of the parameters clearly stated in this thread.

Originally Posted by cbehnken

one thing you guys aren't considering is the larger turbos are going to be opening the wastegate sooner and more often than the smaller ones.

Interesting. Please elaborate!

Originally Posted by cbehnken

What do you think is going to make more power? A turbo that is in the higher parts of its efficiency running 85-90% of the exhaust through the turbine or a turbo running in the middle of its efficiency running only 60-70% of its exhaust through the turbine?

Where are you getting those numbers? As pointed out earlier in this thread, the 13G compressor is more efficient than the 15G compressor up through 6000 RPM where peak horsepower is typically generated.

Originally Posted by 3Sfever

You are right, if there are any 13G numbers out there, they are hard to find.

Not to mention turbine ambiguity.

Originally Posted by 3Sfever

BJMSAM, you need to get to the track, so we can end all the speculation.

I plan to as soon as I resolve my problems with spark blowout (new wires on the way, and if they don't work, I'll replace the coil pack). Perhaps I'll do a few G-Tech runs anyway. I have the first-gen model, and I had it running when I went to the track (with 9Bs and stock fuel); the ETs matched my timeslips exactly but the speed was slightly high since it measures terminal vs. trap. The newer ones estimate trap, so conversion may be possible.

Originally Posted by keithmac

I should be getting my back 13g fitted soon and will be doing some 1/4 mile runs later in the season, will see how the traps look. At the moment my best trap is a 110 with a 13gfront and 9b rear, but I`m still getting the hang of it.

With boost limited to what?

Originally Posted by 3Sfever

The HP calculator quoted earlier in the thread, and very similar ones on Stealth316.com show approx 500hp crank hp to run 116mph traps, so are we saying 116mph traps = approx 400 "wheel" hp?

The parasitic loss for my car was measured as 112 bhp (or 30%) during my 1999 dyno session.

Originally Posted by 3Sfever

Also to confirm, 13t/15g can easily make 400whp at 17psi on pump? (with the mods listed above) . . .

Depends on the dyno!

Originally Posted by 3Sfever

My interest in this is that I have some TD04L-13G's waiting to go on mine.

Mine feel terrific. The only way I might regret my decision is if I change my goals and want to raise boost on race gas (pump gas costs $9 per gallon over here, so not likely). Even then, I'm sure boost falling to 17-18 psi at redline would feel pretty good; Jack did nothing special to hit those 118-119 mph traps with TD04L-13Gs more than a decade ago.