Quote:
Originally Posted by KingLT1
Imo a good portion of 2.9 issues were from install and/or user error. They don't like being over spun and they don't like a ton of belt tension. They are a 18,000 rpm max unit, not a 23k like an Eaton. They like the tensioner in the middle to 3/4 max. The 2.9 is closer to a Mag 2300 but with larger cooling bricks. The 2650 can be pushed a lot harder which is why it became the go to. The 3.0 is about 5 years late on this platform. But they have very good cooling and are fairly efficient. I have had a 2.9 for almost 6years with no problems. If I wanted more than 15-16psi, I would move to a 3.0. The 3.0 also makes more power at the same boost level. About 30-50whp more.
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I didn’t have problems with my 2.9 either, but it was out of breath in the low-900’s. Perhaps some issues were due to install/use, but I’ve seen more failures reported on the 3.0 than I have on the 2650 across a few shop owners I talk with regularly, so maybe the same caution needs taken.
I’m still waiting to see someone push a 3.0 to the limits we know the 2650 has been, especially when ported. I’m definitely not surprised that it makes a little more at modest boost/RPM though.