Pgfpro -
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If I understand your question correctly, your asking why the 1.0 L won't work when in boost and will have to be used like a N/A lean burn engine???
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Uggghhhhh I hate it when I don't reread my typing! I meant "too big", but you had no way of knowing that...
Specifically, the question I was trying to ask was for you to explain the details behind why the 6.0 turbo is too BIG and what effects would having VGT mode enabled have on my setup? Once again, I'm not trying to be hard-headed, just wanting to know why the answer is no
I want to go ahead and state this -
There will be no 1.0! I'm going to stay with the 2.0 Zetec engine and will attempt to "decrease displacement" on the lower rpm band through utilizing the Atkinson cycle, warm air intake and the 3.5 valve setup
Hardline -
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Start pouring over compressor maps and find what best fits your needs
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You need a certain amount of airflow to spool the turbine. VGT only goes so far in regards to that. The VGT turbo would be an interesting choice with the 2.0 setup, but the 1.0 just doesnt put enough energy into the turbine. BTW, if you get the VGT turbo that is canbus enabled, MS3 can address that and control the pitch angle of the vanes.
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I have been looking at compressor maps this afternoon during my breaks at work. I'm trying to understand what everything on the map means. It will just take time and more research till that happens. I have been looking at this site that goes in to the formulas and physics behind it all ->
How to read a turbo compressor map
I'm thinking that variable nature of the big Garrett turbo will help it spool. Whether it spools when I want it is a different story... I do not want any boost before 2500 rpm. If I top out at 4-5 psi @ 6000 rpm, then I'll be thrilled. I'm not looking for high end power, just for a more efficient acceleration when needed with a completely N/A lean cruise. The turbo also serves the purpose of heating and swirling the air going into the engine, both of which help with lean burn. The computers on the 6.0 powerstroke F-series had something dealing with Canbus, I have read it somewhere. Being able to control the vanes would be beneficial, no doubt!
Also, you can post pictures now, since your post count has exceeded 5
Tygen1 -
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In my opinion, the Turbine side of the 6.0 turbos is much to large to get a reasonable amount of spool, not to mention they weigh almost 40 lb's. There is also a GT3576VA that was on the VT365 International motors. The Turbine side on the GT3576VA is a bit smaller than the 6.0 version, but my feeling is that it is just too big. Remember it's not just airflow that drives a turbine, it's the expansion happening from the combustion. Expansion from the heat generated during combustion. When you're lean, you combustion temperatures will be lower and you will have more difficulty driving the turbine. When I was dreaming of turbos, I thought a VW TDI VNT turbo might be ideal. I don't imagine it would be hard to create a control for the VNT and they are quite small and have many aftermarket options. There is also the Dodge/Mercedes Sprinters that are a GT2056 VNT turbo if you want somthing a bit bigger...
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The 6.0 turbo is huge for sure. I did not know it weighed as much as my A/C and P/S delete though! The bigness is kinda the reason I selected it: to prevent the chance of any boost below 2500 rpm.
I drive trucks with the GT3576VA at work, they spool up quick coupled with the DT466 engine! I will look into their maps a little later and compare them, along with the Sprinter turbos!
The italicized portion is my doing so I can show where our views are mismatched. Since my engine is too big for my goals (100+ mpg @ 45 mph), I cannot run any boost in lean burn according to pgfpro. I would need AFRs of 40+:1
This means the turbo will have the part of making boost for a more efficient acceleration and
maybe some interesting passes
Since I am retarding my intake cam to create an Atkinson cycle, this also has the effect of breathing better and possibly making more power higher in the powerband. Better breathing = more expansion = makes boost, if my logic is correct.
If anything does not make sense, just let me know and I will try to explain myself some more. I am tired and heavy-eyed as I type this, so there might be a mistake or 3