ford 302 to inline six conversion
Fleet Mechanic
Joined: Jan 2009
Posts: 1,964
Likes: 2
From: Fort Worth
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!
Senior User
Joined: Sep 2009
Posts: 432
Likes: 0
From: Rocky Mountians
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
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
Senior User
Joined: Sep 2009
Posts: 432
Likes: 0
From: Rocky Mountians
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
Senior User
Joined: Dec 2010
Posts: 266
Likes: 0
From: Southern California
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!
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!
Senior User
Joined: Jun 2010
Posts: 408
Likes: 0
From: Curwensville,PA
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
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Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 4
From: Almost Heaven
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.
Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 4
From: Almost Heaven
personaly I think the 300 is the way to go.
They are tough engines.
Im not sure how many people will believe me but on my last road trip I was driving 65mph, all highway, with my 300EFI, M50D R-2, 4x4 with manual hubs, standered cab long box, loaded down with huning gear.
And I pulled a constent 22mpg.
I am also running a slightly over sized tire. 31x10.50 mud kings, so my mileage was slightly better.
I have pulled a 21ft boat, and moved a 31ft toy hauler around out property with my 300.
That engine will never leave my truck
They are tough engines.
Im not sure how many people will believe me but on my last road trip I was driving 65mph, all highway, with my 300EFI, M50D R-2, 4x4 with manual hubs, standered cab long box, loaded down with huning gear.
And I pulled a constent 22mpg.
I am also running a slightly over sized tire. 31x10.50 mud kings, so my mileage was slightly better.
I have pulled a 21ft boat, and moved a 31ft toy hauler around out property with my 300.
That engine will never leave my truck
I believe that a shortbox 4x2 with 2.73's can get 20. Not your truck.
Senior User
Joined: Sep 2009
Posts: 432
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From: Rocky Mountians
Theres a trick to drivin a stick
Cargo Master
Joined: Mar 2007
Posts: 2,935
Likes: 34
From: Arcadia, Fla
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.
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.
Posting Guru
Joined: Feb 2002
Posts: 1,712
Likes: 1
From: Atlanta, Georgia, USA
Anyways, how about an update from our man who is actually doing the swap? Have you decided to go for it?
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