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Turbo on a gas Tractor

J

jcdeere

New User
Alright so I have an International seven fifty six gas tractor. I really like the tractor and everything but I hate how much fuel it uses. I was wondering if anyone has ever done it and if it worked. Thanks
 
I might be wrong, but if my memory is correct the 756 with the German diesel was pretty good on fuel economy. Why not just install a used German engine. That would be much simpler then trying to modify your gas engine. Al
 
I looked up the compression ratio, 7.6:1.

That should be low enough to run a turbo, still be pushing the limit though for long hard pulling. E10 probably cool it off a little.

Never seen it, but I'm sure someone has done it.
 
Lots of reasons NOT to.. and actually you probably will not get and real meaningful improvement in gas usage. Throttle lag is hard to avoid and hard to live with on gas turbo engines. Just plumbing the air in right and exhaust out will be a job to do right.
 
Years ago I had a Chevy C-10 With a turbocharged Olds 455 V-8 on LP gas. LP is similarly easy to turbocharge as diesels when a balance line is used on the regulator to keep the air-fuel ratio the same under boost as well as no boost. That was a FUN truck!!
 
Even if you were successful, adding a turbocharger will just let it eat gas faster.

Shift up and reduce RPM on lighter drawbar loads, remove weight when not needed, and shut it off when not needed can reduce fuel consumption.

If you put more than a few hundred of hours a year on the tractor, consider using a different tractor. However, $10,000 or more to upgrade tractors could feed your 756 for many years. Pencil out the numbers to find your breakeven before making a big investment.
 
JM welcome to YT! As others are saying I don?t think you will be impressed with the longevity and
the fuel useage will probably not improve as much as you would hope. A diesel swap is probably
your best bet or just buying or trading for a different tractor. I will say this if Tractor Vet sees your
post I bet his soap box will get a good polishing Lol!
 
I put a turbo on a diesel pickup one time.
It had more power but the fuel mileage was
exactly the same IF you could keep your
foot out of it. Ha

I know that yours is a gas so this probably
doesn't help much.
 
Keep in mind that it's 2018, and supplies of old combines and the parts necessary to convert a 756 gasser with a German diesel engine have dwindled. It's a 30 year old idea that while still valid, is not so easily executed anymore.

You also have to take into consideration that the Bosch injector pump on these engines is a potential deal breaker. Parts are tough to come by, and certain parts are impossible to find. A bad injector pump can turn the tractor into a 6-ton paperweight.

You can buy a LOT of gasoline for what any diesel conversion or turbo is going to cost you. You'll never get your money back in fuel savings.
 
More air, it will burn more fuel! I saw a picture once of a JD A with a turbo. They built a box around
the carburetor and presuried it, and installed an electric fuel pump to force the fuel into the
carburetor.
 
. A draw though carb mounted ahead of the turbo is simpler and the compressor wheel atomizes the air/fuel mixture for an evened out mixture to all cylinders .
I wouldn’t expect beyond 20-30% more power on pump premium fuel .
 
I 2nd this!

Put the calculator to work first. Realistic hours used and fuel consumption may not pencil out to any real savings.

If you're looking to experiment and have some fun then it's a different story; you can think of your expenses as "entertainment".
 
Buddy put one on a 400 IH for fun and tractor rides. Problem was it slobbered until it was warm and wasn't impressed with performance. Finally took it off, expensive lesson.
 
(quoted from post at 21:27:57 10/29/18) If compression ratio was only 7.6 to 1, why
did it require premium gas?
Click to expand...

The combustion chambers are not the efficient quench design with less than 40thou clearance and the resulting turbulence that reduces detonation .
The log manifold doesn’t help either. End cylinders still tend to run lean.
5psi will be about max .
 
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