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Detroit 6V53T 30 Nov 2020 13:39 #216728

  • emoore
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Hi All, where do I get the model and specifications to re-build my 6V53T to 300hp for a truck application? Using a 6v53T 250HP core motor.

Thanks for any help

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Detroit 6V53T 30 Nov 2020 19:32 #216738

  • Mrsmackpaul
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Work shop manuals for the larger GM's, as in the 71 series had lists of parts like injectors, turbos, intercoolers etc and the timing and the like

These are the proper work shop manuals, they used to cost a few hundred at least from GM 25 years ago so would imagine its a lot lot more now

Paul
Your better to die trying than live on your knees begging

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Detroit 6V53T 30 Nov 2020 20:25 #216740

  • Lang
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I have the full GM Marine manuals and as Paul says they are very comprehensive.

A quick glance leads me to believe they just put bigger injectors on and stuffed more fuel in. I should imagine it is not as simple as that and might need pumps and timing breathed on as well. The experts will tell us.

Lang

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Detroit 6V53T 30 Nov 2020 20:55 #216746

  • JOHN.K.
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The GM injector includes the pump.....hence the term "unit injector"......and it is as simple as using an injector with a bigger rating(number)......a 53 will normally have a 45 or 50 size ......so if you increase that to the N65 or N70 from a 71 series engine,then there is more fuel going into the cylinders........of course 53 s are prone to cracked heads ,so caution might be advised.......I dont think you will get black smoke like a four stroke,just more heat stress on the exhaust valves.

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Detroit 6V53T 30 Nov 2020 22:06 #216761

  • Lang
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Here is the story.

Attachments:

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Detroit 6V53T 30 Nov 2020 22:13 #216763

  • Mrsmackpaul
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As you go up in injector size the injectors need more stroke so the timing had to be changed so injectors still fire at the correct time

300 hp out of a 6V53 is gunna have a very short life, a lot of these figures were for military use were engine life was not very important

In a truck running around bob tail they might last a lot longer

Paul
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Detroit 6V53T 30 Nov 2020 22:50 #216764

  • Lang
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Paul

In the charts above they have "Continuous" which to my mind means they will run forever. "Intermittent" for occasional short periods and "Full Power" throttle wide with short life if sustained.

The engine is exactly the same as the truck engine but a lot more disaster potential in a boat so I think they are pretty conservative. They note no figures for the 6V53T "continuous" but from the other figures about 200hp seems a long life sustainable rating.

Lang

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Detroit 6V53T 30 Nov 2020 23:49 #216767

  • V8Ian
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Three hundred horses out of a bird scarer! Put Barnes Auto on your speed dial.

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