Custom turbo

OM616

10-02-2020, 05:21 PM #11

(09-30-2020, 11:09 PM)vica153 How much boost and fuel do you need to put into a 617 at 5000rpm to hit 400hp?

There are lots of 3L diesel in the last 10 years with Garrett VNT turbos, but the GTB2260 that they come with are only good for maybe ~300HP. There are a few companies over in Europe that build custom 375-400hp VNT turbos. GTD2872 from darksidedevelopement in the UK. I've emailed them back and forth a bit over the last couple years and they are quite responsive and helpful. There are a few more companies across Europe with similar turbos. I recently saw someone else came out with a GTD2973.

I have been thinking about getting one of those, but living/driving between 5000-11000ft elevation means PR is up from almost 3 to almost 4. This turns that ~400hp turbo into a maybe ~300hp turbo.

What do you plan on using to control the VNT? I'm working with a few other people to build a standalone VNT controller that will hopefully be available in the coming months sometime. I've been playing around with a GTA2056(only easy option back in 2014) on my OM606 for the last few years and after lots of attempts a controlling it with vacuum/boost actuators it never worked well at all. I gave up and that's when we started thinking about electronic controllers. We're also working on getting a bolt on VNT for the 617, but that will likely be good for maybe ~250hp. Great for stock & 7.5mm element 617s, but not gonna cut it for crazy people look for 400hp out of a 3L diesel engine designed 50yrs ago...lol jk.

The issue with the VNT turbos that I have looked at is none of them will produce 40+ lbs of boost at the top end and be any where near with in the efficiency range. The S200 compressor is good for 70 ish PSI at a high volume of air. I can get a S200 with a twin scroll turbine housing, but even with a quick spool valve, I dont think it would make the boost I want soon enough, which is why i like the VNT turbine, as it allows the adjustment of when it starts building boost.

I am looking at the GT25XXV turbine because I want more flow then the GT22 and I don't want a monster turbine. I am looking at having the turbine controls regulate the boost up to around 15 lbs, my goal is to have 5 or 6 lbs literally right off of idle. Then for the max boost at full power, I would use an external waste gate which would bypass what exhaust he turbine could not handle in an effort to keep the EMP within 5 ish lbs of Boost.

I would be mechanically controlling both the VNT vanes and external waste gate.

As for fueling, I will be running a 10mm pump with custom nozzles and I have the high speed governor disabled so I have full fueling all the way. I really do not want to mess with compounds or a blower, I am trying to get something that may be impossible lol.

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