<VV> Pinging Question

[Tony Underwood]

At 01:40 PM 9/20/2010, FrankCB at aol.com wrote:
>Tony,
>Not only will retarding the spark usually cause the engine to run hotter,
>it will also REDUCE your gas mileage.  So saving 5 to 7% on the cost of a
>gallon of gas is a loser if it REDUCES your gas mileage by 10%.
>Frank "not always fully advanced" Burkhard
>




That's exactly why I run premium... to prevent pinging, prevent 
having to retard timing and run hot, prevent losing out on fuel 
mileage, prevent me having to pull a head to replace a knocked out 
valve seat.

Frank's right... the money saved by backing off timing to prevent 
pinging isn't as much as what you lose from the reduced mileage.   I 
have figures on the log books from Back When, between playing with 
timing and using premium in a 110.  There's a noticeable drop in 
mileage when you back off the timing to keep things from pinging and 
in summer heat that doesn't always work in the first place and you 
still lose fuel mileage.




tony..