Jack
Tom Warner sends a better answer, but since I had this already
typed.....you're gonna get it anyway
I had 108,000 on my 403 when I started last year. (Also a ' 77)
I averaged just over 9mpg on 18,000+ miles. What to do? Change
plugs to Bosch Platinum, put a kit in the carb ( did it myself, and
I've got the IQ of a carrot), exhaust: 2 1/4 up to 2 1/2 and into
Walker cheapos but have a fancy name, out 2 1/2 up to 3" Y and
back 3"to tail, most importantly....get your foot off that pedal
And that's my story.
Mikeb Antigonish, NS
> I am finally getting to the point of starting to care about the
smaller
> things. Just finish Installing a Napa Steering box. -- I should done this
> first thing-- I have a little budget money left over. The next item on the
> list is better fuel mileage.
>
> So here is the situation. I am currently getting 6 to 6.5 miles per gallon
> on my 1977 403 with 109,000 miles. I have no complaints about power or
> starting. In fact it runs pretty darn near perfect. The only problem is the
> fuel mileage. Recommendations: Should I:
>
> Leave well enough alone? ---Get over it--
>
> Replace the carb with a Caspro rebuilt? Or other?
>
> Put a Jacobs Spark System?
>
> Put a Fuel injection System? If so suggestion, Part # and vendors
>
> Other Suggestions?
>
> Jack Todd
> 1977 Transmode
> Harlingen, Texas .... Paradise
>
>
Tom Warner sends a better answer, but since I had this already
typed.....you're gonna get it anyway
I had 108,000 on my 403 when I started last year. (Also a ' 77)
I averaged just over 9mpg on 18,000+ miles. What to do? Change
plugs to Bosch Platinum, put a kit in the carb ( did it myself, and
I've got the IQ of a carrot), exhaust: 2 1/4 up to 2 1/2 and into
Walker cheapos but have a fancy name, out 2 1/2 up to 3" Y and
back 3"to tail, most importantly....get your foot off that pedal
And that's my story.
Mikeb Antigonish, NS
> I am finally getting to the point of starting to care about the
smaller
> things. Just finish Installing a Napa Steering box. -- I should done this
> first thing-- I have a little budget money left over. The next item on the
> list is better fuel mileage.
>
> So here is the situation. I am currently getting 6 to 6.5 miles per gallon
> on my 1977 403 with 109,000 miles. I have no complaints about power or
> starting. In fact it runs pretty darn near perfect. The only problem is the
> fuel mileage. Recommendations: Should I:
>
> Leave well enough alone? ---Get over it--
>
> Replace the carb with a Caspro rebuilt? Or other?
>
> Put a Jacobs Spark System?
>
> Put a Fuel injection System? If so suggestion, Part # and vendors
>
> Other Suggestions?
>
> Jack Todd
> 1977 Transmode
> Harlingen, Texas .... Paradise
>
>
