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Tires & RPM Help

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Rembrant
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Re: Tires & RPM Help

Rembrant
Dyn Blin wrote
Since I got home, although I really don't notice much change in clutch feel getting it rolling unloaded.  City mileage has stayed the same- I expected a bit of drop with the increase in contact patch and resistance.  Highway has seen roughly a 10% improvement in mean MPG, and I hope to see a bit more all things equal when spring sees the return of the better gas.
10% is nothing to sneeze at. That's a decent improvement in my books.
1994 F150 4x2 Flareside. 5.0 w/MAF, 4R70W, stock.
1984 F150 4X2 Flareside. Mild 302 w/ 5spd. Sold.
1980 F150 4X4 Flareside. 300i6 w/ 5spd. Sold in 2021.
1980 F100 4X2 Flareside. 351w/2bbl w/NP435. Sold in 1995

Dyn Blin
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Re: Tires & RPM Help

Dyn Blin
I was surprised to see how much of an affect it has in that 55-65 MPH range.  Although there's likely an influence of simply having new tread, too.
Sonoma County,CA
1982 F150 Flareside XLS
NP435 4x4
351W Motorcraft 2150

Gary Lewis
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Re: Tires & RPM Help

Gary Lewis
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In reply to this post by Dyn Blin
Good report.  

I'm sure you've accounted for the fact that you are going ~10% further each revolution in your calc's - right?

As for "I'm usually in the left lane with the big rigs at an easier pace", is that the Limey showing through?  
Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

Dyn Blin
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Re: Tires & RPM Help

Dyn Blin
This post was updated on .
Is that why there were so many people around me cursing?  

And here I thought they were waving their fists in blue oval solidarity...

Yes, intuitively I figured that once I had the girl rolling, the distance per revolution would have an effect, but I also figured the extra inch and half in height and increased contact patch would create enough resistance to mitigate the gains.

I'm often wrong, but in this case, happy to be.
Sonoma County,CA
1982 F150 Flareside XLS
NP435 4x4
351W Motorcraft 2150

Gary Lewis
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Re: Tires & RPM Help

Gary Lewis
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Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

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