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Originally Posted by BabyDiesel
Thank you! I just saw it a few minutes ago! I can't believe I made it to the front page 
That is good to know. I am concerned in the event I have to go WOT that there will be too much boost/pressure and could cause damage.
I'm trying my best not to get hung up on the 1.0 option. It just seems like it would give better fuel economy all around, albeit it would have a lot less power even with a turbo. But I'm not going to doubt your expertise  You have much more experience in the realm of ridiculously crazy modification than I do! I'll look into what it will take to have an Atkinson cycle on my engine. I think 2 notches of retarded cam = 18*. That might be too much... I need to get a schematic of the Prius' valve closings and attempt to replicate it.
One thing to look into is my static and dynamic compression ratios. The stock S.C.R. on a 2.0 Zetec is a decent 9.6:1. Now, if you look into a Prius engine, they have close to a 13:1 S.C.R.! Comparing the two, it looks like a compression bump would help my N/A efficiency. Although with a turbo, too high a C.R. would mean lost efficiency due to pulling timing out. I'm thinking that a small boost in C.R. to around 10.5:1 would be best for both scenarios. |
I personally don't like the idea of cylinder deactivation. I have it on my 2013 GMC and its a joke. I don't even use it anymore (run in manual mode) and have only seen a 1 mpg decrease with it disabled, but enough with my rant. lol
I also think if you deactivate two cylinders you will have some harmonics that will make the engine run very rough and also some intake flow issues. I did some C D testing on the Talon a few years ago and I couldn't improve on my fuel mileage, in fact my fuel mileage drop by 3 mpg.
On my sons turbo Civic 1.5 L it had a fairly large frame turbo on it based on the engine size and we still manage to improve fuel economy. I couldn't make any low boost lean burn though do to what we are talking about engine size verses boost. What I did is setup the car for lean burn with a max around 18:1 A/F ratio and the car got great fuel mileage. I think the compression was around 9.5:1?