[Tigers] fuel milage

[Theo Smit]

The fourth gear in a top loader, like many transmissions, is a direct coupling of the input and output shafts. There is no actual gear train involved.
As Tom Witt mentions, the Granada overdrive four speed actually replaced the third gear with an overdrive ratio and then they flipped the arm on the 3/4 linkage so that the gears were selected in the opposite order. But as he mentioned the ratios were fairly widely and unevenly spaced. 

Theo

> On Dec 17, 2021, at 1:18 PM, Allan Ballard <aballard at ix.netcom.com> wrote:
> 
> I want to thank those who responded as you’ve provided much food for thought.
> 
> With my engine I’d consider mid-20s MPG to be a victory.
> 
> One option that hasn’t been chronicled for those with stock 4 speed top loaders is substitution of the 4th gear with a 5th gear.
> 
> For the  open road of course.
> 
> ~Allan Ballard
> ~~Mk1a Tiger
> ~~Series I Alpine 
> 
> Sent from my iPhone
> 
>> On Dec 11, 2021, at 2:56 PM, clyde mclaughlin via Tigers <tigers at autox.team.net> wrote:
>> 
>> I need to preface this posting with the idea that everyone will have comments on their personal experiences and ideas about fuel milage. I don't want to start a two week dialog on the subject, but would like to through out a few of my opinions on the subject.  First and foremost fuel mileage and rear tire  wear has a direct correlation to your right foot! Secondly gearing would be the next most bang for the buck, i.e. stock 2:88's and a 5speed OD transmission, followed with good engine tuning.  Tire size that was previously mentioned would be very negligible given the restrictions of tire/rim combinations for our Tigers.  I recall in the 50's when the hot dodders were jacking up the rear with spring shackles and other methods, us sports car people laughed and figure they have done it for fuel mileage because now it is going down hill all the time, Ha Ha! I can comment that my car had 3:54 gears with the 4 speed and a k code engine, mileage about as poor as it gets, I currently have 3:07 gears with a 5speed and with 70-75 highway speed I get 23-25mpg.  Carb fuel  mixture is about 3.5% CO with less than 200HC at idle and runs very well, it will lean out to about 2.5%CO and 150HC at a no load 2000rpm.  Forgot to mention I have 13 inch tires, 205/60 rear 185/60 front.
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