<VV> Conversion to EFI: Is it really cost effective?

[Blaine Sanders]

I am beginning to collect parts to do a fuel injection conversion...  Before
I get too excited about this project & invest in the big $ items, I would
like to hear some first-hand accounts on fuel economy.  If there is anyone
on the list who is running EFI on their Corvairs, please share with us your
average MPG stats.  With the outrageous gas prices lately, it's starting to
make more sense to do this conversion... But it depends entirely on what the
expected MPG increase would be.

I'm no math wizard, but this is the way I figure it:

Assuming an EFI conversion costs $1,000, and assuming that gas costs $2.25
per gallon:

Then $1,000 buys you 444.4 gallons of gas.  On 444.4 gallons of gas:

@ 20 MPG, you could drive 8,888.88 miles (assuming your stock Corvair
averages 20 MPG)
@ 22 MPG, you could drive 9,778 miles [a difference of 889.12 miles]
@ 25 MPG, you could drive 11,111.11 miles [a difference of 2,222.22 miles]

So for every $1,000 spent on gas, you would save:

@ 22 MPG = 44.456 gallons of gas saved = $100 savings.  $1,000 / 100 = 10.
10 x 8,888 miles = 88,888 miles for conversion to pay for itself.
@ 25 MPG = 111.111 gallons of gas saved = $250 savings. $1,000 / 250 = 4.  4
x 8,888 miles = 35,552 miles for conversion to pay for itself.

If you drive 12,000 miles per year, and the EFI conversion gained you 2 MPG,
it would take approximately 7 years & 5 months to pay for itself -- hardly
worth it.  If the EFI conversion gained you 5 MPG, it would take 3 years to
pay for itself -- much more tempting...

{did I do my math right?}

Ideally, I'd like to see it pay for itself in one year.  In order for that
to happen, I'd either have to gain 15 MPG, or gain 5 MPG AND figure out how
to do it for $333 bucks.

Anyone out there getting 35 MPG with their EFI corvair?  Anyone out there
getting 25 MPG & done it for $333 or less?

Am I nuts?

Thanks,

Blaine