Quote:
Originally Posted by incautious
WILL NOT LET POST LINK TOO FUNNY Search aero turbine exhaust mpg chart
on google
I no longer have my IRS mandated log book( sold the business), but I used a 1990 5.0 Lincoln town car for business putting about 40,000/year on it. Just by installing 225 75 15 tires on the rear in place of the stock 205 70 15 and installing a 2" dual exhaust( in place of single) with Police issue "h" pipe , 18" magnaflow low restriction mufflers and factory tail pipes my MPG went from 19-20 to 23-24. total cost of the exhaust system $200(parts only) went from using 2000+ gals in one year to 1700 gals at $3.50 that's $1200 savings/year Speedometer was corrected for the taller tires. So mileage results were accurate.
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The Ford 5.0 has always had bad heads for performance use, but those small ports and valves have high velocity, which is great for bottom end torque. One of the reasons that a 5.0 with the tuned port style manifold can mpg like crazy in the right chassis. The Honda is the same. Small ports, high velocity, mild cam timing, lean burn, big mpg.