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Originally Posted by basjoos
If I swapped a VX engine into my car, I wonder to how high a speed I could maintain lean burn and how much it would improve my overall mileage.?
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http://72.14.209.104/search?q=cache:...&ct=clnk&cd=11
A good read on the VX. This compares the 92 VX to the 91 DX, although there are some references to the 92 CX. The interesting stuff begins on page 22.
To answer your question,
Table 4: Technologies Used to Increase Fuel Economy in 1992 VX
Fuel EconomyImprovement (%) '91 DX to '92 VX
Multi-point fuel injection 1.5%
Low rolling resistance tires 1%
variable valve timing 2.5%
lean burn 5 -10%
reduced friction 1.5%
roller cam followers 1%
Weight reduction 2.5
Aerodynamic improvements 1.5%
Gearing and drive ratio changes 2%
Reduced idle speed/rpm 3%
Shift indicator light 5%
Total 45.5% - 50.5%
When comparing to your CX, I would guess that only the VVT, lean burn, reduced friction and roller cam followers would apply. That adds up to 10-15%. Somehow I have a difficult time believing that.
Perhaps iyou could to put your aero mods on my car to test it out before taking the plunge with a swap.
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