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Old 05-23-2021, 01:05 AM   #12 (permalink)
BongoBennie
lead foot
 
Join Date: Oct 2011
Location: United States
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Quote:
Originally Posted by serialk11r View Post
Ah, I see, good to know.

It doesn't matter how little boost the turbo produces, if you have extra restriction in the exhaust at part throttle, it's wasted energy. If you lose 1psi of restriction you'll pick up on the order of 1mpg from pumping loss reduction alone. Additionally, if the turbo is reducing manifold vacuum, you're reducing the internal EGR effect at part throttle too.

That's what electronic wastegate control is basically for; you'll never see an OEM running a passive wastegate.
Yeah, my smart friend suggested an "active wastegate" that can remain open at low power levels, maybe in a later stage

Next mods in store... 3.4:1 FD is ordered
will be going to 08 Civic Hybrid 15" rims .... might stick with 24" and go with 175/65/15 Michelin Energy savers
or
185/55/15 Yokohama ADVAN Fleva 23" which would still be taller ratio than what I have now with the 4.1 FD

I'm also starting to drive a bit slower and actually letting some people pass me, I figured the FD change will also slow down the car a bit
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2001 Insight 11.5:1 K20a3 turbo / 2003 Civic 4x4
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