Fredrik_Steen

What do you think was the root cause for the failed ringlands?

What was the failure and root cause?

I vote for leve them as they are and send it. If you have the ability lower the ignition 1-2 degrees at peak torque.

Best feeling when it finally runs and idle

Since you use EFI i would say go for compression and if necessary drop the ignition timing some degrees when pushing high boost on pump fuel.

Maxpeedingrods are excellent value for money and they will outperform what the gearbox can hold.

Works great, no issues at all

It might be cavitation due to not enough flow into the pump / some kind of restriction. When the pump cool off it works again for some time.

Are you loosing pressure after 5 minutes or what is the issue?

Yes i based my recommendation on this map ( I added two red dots). And a estimation that he will be pushing around 2 bar to get 360ish hp without intercooler. I think this turbo are more suited for a stronger/more tuned base engine

I'm guessing it's the maxspeeding brand you are looking at. It's cheap Looking at similar compressor maps I don't think it's the best choice out there for your application. If you still have stock b12 camshafts in the engine I think 150ish are a bit optimistic.

It's hard to say what a turbo are "good for" It depends on your engine combination. In your case I would calculate with a 120hp engine. At one bar it will produce 240hp. Two bar = 360hp if the exhaust back pressure are kept in check and the intercooler can support the heat. Roughly estimations, but gives you a idea when you check compressor maps

If you can afford it I would go ball bearing, journal's flow a lot of oil (that oil you want to keep in the crankshaft bearings) Learn how to read compressor maps, I like this channel They have several videos on the topic

It's not optimum. Like Gixer1460 said get slotted sprockets