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Originally Posted by pgfpro
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Thank you! I just saw it a few minutes ago! I can't believe I made it to the front page
Quote:
Originally Posted by pgfpro
You wouldn't have to have the turbo wastegated at 2 psi and up to 6 psi. The proper choice in a turbo would only get you the low boost numbers, with out anything going through the gate.
With the low Cd it still looks like the you would be running in N/A even with a 1.0 L equivalent. This why i would run all four cylinders in a Atkinson cycle N/A and pull one tappet per cylinder to help with swirl. Then when needed get into a mid-load and start making some boost in lean burn. This will accelerate the car up to speed and go back into light load steady state.
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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.