what conversion constant # did you set your gauge cluster to, for those tires goofy?
what kinda MPG's is your IDI getting an tips on some other stuff???
- Thread starter 88IDImattman
- Start date
what conversion constant # did you set your gauge cluster to, for those tires goofy?
Goofyexponent
Mentally Unstable..
....I was waiting for someone to catch that!!!A 265/75R16 is almost EXACTLY the same height as a 253/85R16 which came stock on the truck. The only difference is a 265 is about an inch wider than a 235. (265MM across the tread face vs. 235 mm across)
My proof!!! a 0.26% increase in size.
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ah,goes to show i didn't even look 'em up first lol.
carry on.
carry on.
LARRY RANALLO
Registered User
city-16 18 highway 22-23 tachometer at 2000 or less. gps shows that my speedometer is off 2 or three miles per hour. rebuilt ip and bb injs over 200,000 miles. lots and lots of diesel clean, every tank fillup
Goofyexponent
Mentally Unstable..
That brings up another point....I ran power service diesel Treat in my truck. Just a normal dose, and it DOES work!!
MidnightBlade
Shiftin' Smooth
On 150K injectors and IP - 9 MPG U.S. 
On fresh Uhaul IP turned up 3 flats and 2000 PSI injectors - 20 MPG U.S.
This is in my F250 in my sig
On fresh Uhaul IP turned up 3 flats and 2000 PSI injectors - 20 MPG U.S.
This is in my F250 in my sig
'94IDITurbo7.3
HAMMER DOWN!
unless that is good for your truck i think it is time for some new injectors and a IP.
MidnightBlade
Shiftin' Smooth
unless that is good for your truck i think it is time for some new injectors and a IP.
I hit "Submit Reply" instead of "Go advanced"
88IDImattman
Full Access Member
so as long as im not laying on the long pedal on the right im getting really good mpg ....now when i rolled into it for a lil HWY romp at 70 - 75 things changed alot mpg dropped to 16 or less i think i got a low of 12 im really pleased with the way the truck is performing for a 23 yr old flying brick it's doing great an if i jus set the cruise at 60 im running a hair over 2000 rpm's ...one of my goals is to try n get my RPM at hwy around 60 to 65 down to 17 or 1800 ...........so im reading an trying to learn from things i see on here to make it happen
Goofyexponent
Mentally Unstable..
OH! One more thing I think I should add.....my mileage numbers were obtained with a pinned clutch fan.......my radiator was acting up mid spring, so I pinned it. Might be a couple MPG higher with the new clutch fan hub installed
and might be another one or two on top of that, if you decide to ditch the old thing for a couple electrics.
gonecrazyi
Full Access Member
With 305s I was getting 15-17mpgs over several tanks. Depends a lot on how I drive. With my 325/85/16s I get about 10-12 with the tires at 30psi and around 14ish at 70the psi. When I was running 265#s the lowest I ever got was 13 pulling a 25 ft flatbed with a crewcab on it st around 75-80 mph for a couple hours straight.
?
Also, the 265 and 305 tires we're pre turbo, now I have an ats with the 325s. It was a total **** with hugh tires and no turbo lol. Now it's a little slow off the line but pulls decent once moving.
?
Also, the 265 and 305 tires we're pre turbo, now I have an ats with the 325s. It was a total **** with hugh tires and no turbo lol. Now it's a little slow off the line but pulls decent once moving.
pennsylvaniabo
Full Access Member
Whats funny is around town my truck does horrible i get 10-11 mpg. Open road i get 15-17, with all time best being 19mpg. This is with a zf5/4.10s and 256/75/16 tires....With a very old fuel system.
Around town it eats fuel because it's always revving higher for shifting etc.....
Around town it eats fuel because it's always revving higher for shifting etc.....
sandrow
Full Access Member
16 to 18 on both of my previous rigs, I hope my next one gets that kind of mileage or better!!!
Simp5782
SNOW TACKLER!
Ha, yeah maybe with a 30mph tailwind and you doing around 45/50mph in neutral down hill most of the time.
I saw 20.2 in my 85 with the stock 3.55s and a t-19 running around 55/58mph over 306miles. My 94 turbo I have seen as high as 25 on cross country trip with intercooler, zf5, 3.55s, cold air, new pump, new injectors, running just below 2000rpms (68mph). Montana to Indiana empty.
My 85 now with 4.56s empty at 55mph I see around 14 on the 30miles to town and back. I towed my 20k lb military 6x6 on my 8k lb 25' GN from Miles City, MT to Kalispell, MT over 2 mountain passes (560 miles) running 50-60 mph I got between 7-9. Also loaded with 120gal of fuel in the bed plus my tanks full.
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