Will It Hold together?

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Jan 29, 2008 | 07:57 PM

Hellonwheels

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From: Suffolk Va

Will It Hold together?

I have a 92 f-350 2 wd that is natural aspirated with 180000 miles on it. I used to get about 16.5 mpg highway going 55 with a 4.10 gear which i thought was pretty good. Since the speed limit changed to 65 round here the fuel mileage has really dropped. I have always wanted to put a ats turbo on it. I was wondering if my motor will come unglued if i install a turbo on an engine with this many miles on it.

Jan 29, 2008 | 08:35 PM

George D.

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From: Las vegas

Should be fine 180,000 is barely starting to break the motor in.

Jan 29, 2008 | 09:22 PM

somedude

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From: Prince george, B.C.

i did mine at 350000 kms and its great but my mileage is basically the same or worse
sometimes

Jan 29, 2008 | 09:42 PM

Dave Sponaugle

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From: Nutter Fort, WV

The cruise RPM at 65 with 4.10 gears are killing the MPG unless you have an overdrive tranny.

You might be due for new injectors to get the MPG up some.

Jan 30, 2008 | 12:19 AM

casscodiesel

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bigger tires will reduce your rpm's, the next best thing is regearing or getting s five speed trans

Jan 30, 2008 | 12:57 AM

CheaperJeeper

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From: Kent WA

Quote:

Originally Posted by casscodiesel

bigger tires will reduce your rpm's, the next best thing is regearing or getting s five speed trans

Ditto. I have 4.10s too and swapping in a ZF 5-speed with a .77 OD 5th gear dropped my RPMs at 65 mph from around 2900 to 2200.

WHAT A DIFFERENCE! Not only is the fuel mileage much better, but it doesn't sound like it is straining just to get up to 70 mph either....

Regearing the axles or putting bigger tires will work too, but they not only raise your top end speed on the highway, they take away some of your bottom end too. To get the same effect on top end with gears you'd have to go all the way down to 3.08s, I know yours is 2WD, but for the 4WD guys you've got to do both axles - for about a grand per axle

To get the same amount of top end improvement with bigger tires you'd have to go from the stock 235/85/16 (31.7" diameter) to a 41" diameter tire. That's pretty big, and even if you went with some 35's or 36's you'd only get about half as much improvement as you would with the 5 speed.

IMO, the 5 speed or an OD like a Gearvendors is the only way to go...

Last edited by CheaperJeeper; Jan 30, 2008 at 01:07 AM.

Jan 30, 2008 | 05:17 PM

Hellonwheels

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From: Suffolk Va

I appreciate the information. Yes i have an e4od with overdrive. I dont want to put a taller gear in the truck because it has to pull i lubrication trailer to the job. Load with oil and grease that trailer can get pretty heavy.