GM diesel 4-53

Mark Hill · Nov 27, 2009

How to get more HP out of 4-53 GM.My tractor is a 1968 1950 oliver and the injectors are N50 Thank you for any help.

PopinJohn · Nov 27, 2009

How much more power do you want? And do you want a puller or a tractor for field work? A 4-53N with 50's is rated 136 HP @ 2800 RPM at the flywheel.
Bigger injectors and higher RPM will make more power at the expense of longevity.
A company in Houston used to modify 4-53's with a turbo and intercooler for 200HP at 3200 RPM. Piston rings would last about 24 hours on the dyno with that load.
There is also a factory turbocharged version of the 4-53 engine that makes more power. With 60's the rating is 185 @ 2500.
Since there are several internal changes from the natural to turbo, it would almost be worth it to locate a 4-53T for your tractor.
And then there is the air cleaner, muffler, radiator, etc. etc. needed to accommodate the turbo engine on the Oliver.
Or, you could install a 6V-53N, 210 Hp @ 2800 RPM.
PJ

buickanddeere · Nov 27, 2009

Four valve heads or two? N or S series sleeve/pistons? Dry or oilbath aircleaner? As previously asked, your intended use(s) of the tractor?
You might squeeze 175HP out at 2800rpm without a turbo.

F-350 · Nov 28, 2009

N70 or N80's but they are for tractor pulling only. 55's will put you at around 120 pto hp,up 15 from stock.

GM diesel 4-53

Mark Hill

New User

PopinJohn

Member

buickanddeere

Well-known Member

F-350

Member

Similar threads