<VV> Economics Re: Regular Gas and Fuel Economy in a 110hpCorvair

[Bill Elliott]

Retarding timing (and lowering compression) results in lower mileage due 
to lower engine efficiency. However, hotter cams (more overlap, etc) can 
reduce economy but shifting the power curve up...

Whether the use of low octane fuel (which _sometimes_ has a higher 
energy content than high octane fuel) is highly dependent on that energy 
content and the engine it's used in. Generally, the answer is "no" due 
to volumetric efficiency....

Bill

Shaun McGarvey wrote:

>I believe retarding timing gives better hwy mileage.
>I also believe that regular fuel gives better mileage.
>Am I wrong?
>
>----- Original Message ----- 
>From: "Ron" <ronh at owt.com>
>To: "Shaun McGarvey" <shaun_mcgarvey at shaw.ca>; <virtualvairs at corvair.org>
>Sent: Friday, January 04, 2008 1:41 PM
>Subject: Re: <VV> Economics Re: Regular Gas and Fuel Economy in a 
>110hpCorvair
>
>
>  
>
>>The 110 should get better mileage due to it's higher compression and more 
>>advanced timing.
>>RonH
>>    
>>
>  
>