If you haven't recalibrated for the tires, that could account for part of your added fuel economy due to miscalculation. If that's not the case, good work!

 

it would actully be getting better mileage than 22,

if you think about it, tires that are "X" larger in diameter move "X" distance further per-revolution.

The Odometer records how many revolutions your tires make to figure distance because they are calibrated to the stock tire size.

Soooo if your tires are larger diameter you travel a percentage further than stock tires would per revolution.

therefore when you caluculate mileage from distance divided by fuel consuption, you get the mileage "reading" as if the truck thought the tires were the same size because the tire size isent compinsated into the OD reading.

so with my larger diameter tires most likely I was getting better mileage than when my OD was telling me

 

You're were right until the end. The mileage on the odometer is going to read more with a taller tire therefore giving you an inflated figure for your gas mileage calculation.

 

no I think you have it backwards. Your miles would read higher with a smaller diameter tire because it would spin more time for the same amount of distance

 

You're right. My bad.

 

its all good

 

300 is a great motor. If you want to swap it in dont let anyone stop you.

Btw i would take a 300 with about the same torque and less horsepower over a 302 any day because the 300 will out last the 302. Far as im concerned for a truck reliability, pulling power, and maintenance costs are what makes a good truck motor.

Good luck with your swap!

 

i agree good choice on the swap!... both engines will last pretty long if taken care of but thats where their different... the 300 will last forever even if neglected..my one buddy ran cooking oil through his cause thats all they had when the oil pan got a hole in it....that motor went to hit 400,000 miles

 

yep that 300 is surely a nice motor. i'm currenlty rebuilding a 300 that had 444k on it i believe. It only stopped ticking b/c of a blown head gasket

 

No sir, I always wanted a nite edition though. I'm not crazy for chrome even though I do like chrome. Just a regular 4x2 XL FlareSide. I've only seen one other FlareSide exactly like it though and that was on FTE.

 

I am not calling you a liar. However I do not believe that you get anywhere near 22 miles to the gallon.

I believe that a shortbox 4x2 with 2.73's can get 20. Not your truck.

 

mind you this was in cold weather, perfict highway roads, slight crosswind. No stop from pump to pump. I swear on my grave I got 22.3mpg.

Theres a trick to drivin a stick

 

I'm jumping in here and will be dumping the 302 in favor of the 300.

Yeasterday I took 2500 lbs of scrap in and that 302 just would not pull unless I shifted manualy to keep RPMS over 2800! And you all know the AOD's don't keep 2nd gear unless you jack around the shifter in a way to force 2nd gear I had to do this just to spin up the 302 in to it's power band. Now with a 300, the tranny would shift right back in to the 300's power band of 1500 to 2000 RPM and pull along just fine.

I have all the parts execpt for the engine which I can get from the pick-a-part yard fro around $300.

After I get the 300 in the F250, the 302 will be rebuilt and stuffed into my Bronco2 where it will get that little truck much needed power and rid it of the pos A4LD tranny once and for all.

 

I believe it. It's extremely unlikely that you'll find a situation where the 302 will get higher fuel economy than a 300. When I had my 302-powered '77 tuned for peak fuel economy I could get around 17 MPG. That truck had a C4 and a 2.75 ratio 9". My '95 with the 300 routinely sees 21 MPG on the freeway and all it has different from the factory is a Flowmaster 50-series. The '77 was a lighter truck, too. That's not a perfect comparison, because the '77 was WAY faster and would go from 70-100 so fast it would freak you out. The 300 can always keep up in traffic though. Oh, and the '95 has 285,000 miles on it and an E40D trans with a 3.08. If the '95 had a 2.75 and a C4 the milage would be closer, but I still think the 300 would be better. A 300 and an E40D is the perfect drivetrain for a daily-driven beater horse.

Anyways, how about an update from our man who is actually doing the swap? Have you decided to go for it?