Gear Ratio Comparasions

[Beans]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Mildred</i>

... In conclusion, the old adage of the slower the crank spins, the less your gasoline receipt reads, holds true ... <hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">
Not quite true, my DHC in it's earlier guise with it's original 3.90:1 back axle was more fuel efficient [B)]
But the last time I drove it as such we could still get leaded fuel from the pump.
With the 3.45:1 that is fitted now, it is between 5 and 10 % thirstier.
That might be due to modern fuels having a lesser energy level [?]

<center>
<font color="blue"><i>1980 TR7 DHC (my first car, now restored and back on the road)
1981 TR7 FHC Sprint (better known as 't Kreng)</font id="blue">
<b>[url="http://www.tr7beans.blogspot.com/"]<u><b><font size="3"><font color="red">My full Weblog</font id="red"></font id="size3"></b></u>[/url]</b></i></center>

[FI Spyder]

<blockquote id="quote"><font size="1" face="Century Gothic, Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Beans</i>


That might be due to modern fuels having a lesser energy level [?]
<hr height="1" noshade id="quote"></font id="quote"></blockquote id="quote">


You might have something there. Don't know about Europe but most fuels in N/A have 5% to 10% (and sometimes higher although they usually indicate it)) alcohol content which has a lower energy content. Only a few stations have no alcohol in their high test like Shell, Chevron and Co-op. Of course here most older stock engines here have the 8 to 1 compression and only need the 87 Octane (N/A) although some use the mentioned high test just to avoid the possibility of alcohol problems on older systems.

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