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Hopping Up a 280 Cummins

Posted By big-boss Wednesday, October 12, 2011 1:28 PM
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big-boss
 Posted Wednesday, October 12, 2011 1:28 PM
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Has anybody got into a Cummins like a hot rod gas engine?

Say for example: Lighten the pistons, Beef up valve springs, port the heads stuff like that. Not for working but just for fooling around?
Wolfcreek_Steve
 Posted Wednesday, October 12, 2011 2:30 PM
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Lots of work being done on the 5.9s for the Dodge boys and there are definitely pulling trucks running Cummins' so someone must be.

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glenn akers
 Posted Wednesday, October 12, 2011 2:55 PM
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Put a straight pipe on it and tell ever one that ist 500 HP and no one will know the difference and will be cheaper.

glenn akers
curdog
 Posted Wednesday, October 12, 2011 4:17 PM
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Sounds like when the locals sell an old Chev pickup round here. Cross a coupla plug wires and tell em it's got a cam .

Works every time...


I'll get those pesky sharp corners rounded off the gears in those transmissions yet.....
TEWHITEIV
 Posted Wednesday, October 12, 2011 5:03 PM
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Pull one out of an old RV.  Every RV'er  I've ever parked next to is bragging how they are getting 500hp out of their small to mid-size diesels.:Whistling:

All I need is one more good deal and I'll be out of business.:unsure:

I'll stick with the old and they can stick the new.:blink:

kblackav8or
 Posted Wednesday, October 12, 2011 6:42 PM
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People have done all those things and more.  Most of the same things that you would do to a gasser still apply.  Get more air and fuel in, make more power.  I would be leery of modifying pistons without a thorough knowledge of what you are doing.  If you are looking to create Frankenstein, there will be folks that tend to frown on it.  You run the risk of building a time bomb that will leave you stranded somewhere.  On a lower RPM engine like your 280, it will never notice the difference of taking a few grams of weight off a piston.  There isn't much to gain.  You might find a little power with porting but there isn't a vast database of porting tech out there.  Again, lower RPM engine, the gains may not be all that spectacular..or even noticeable.  There aren't really many options in terms of vendors who have high performance parts for these engines.  Any real increases in power lie in fuel delivery (pump work), camshaft and engine timing, a turbo matched to the rest of the combination and properly sized injectors.  Those are just the basics and I have no real information or links to offer.  You might be better served just doing a engine swap to something that does what you want in relatively stock form.  Again I would take the sage advice and proceed with caution.  Make sure it is properly tuned and healthy and accept what you have.  I have some of the same desires and chose the engine swap route to get there.  Even with that I replaced a few items that needed replacing with items that were optioned for greater power.  We'll see how it runs in a month or so.  If you really need more from that engine, find what the factory did and rebuild what you have to that spec.  Proceed with caution. 


Aaron
 Posted Thursday, October 13, 2011 5:08 AM
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Amazing.

I can't get anymore out of it, I've got both sticks hot clear up to the knobs allready.
www.killcarb.org
burnin oil
 Posted Thursday, October 13, 2011 7:11 AM
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I agree with everything Kev said.  However I would look into porting the head some yourself.  Almost all stock heads have terrible flow restrictions.  Even a mild port job will help the turbo light off a little better.  The faster a turbo lights the faster you can throw the fuel to it, and you should be able to do it cleanly with less EGTs. 

RV engines are actually up in the 500HP range now.  The manufacturers can get away with this because of light load requirements and no need to worry about longevity to the motor.  You don't see alot of RVs with 100k on the odometer.  Most may cross the country a few times and then the rest of their life are north to south once a year and thats if they are even used in the first place.
Eddy Lucast
 Posted Thursday, October 13, 2011 1:11 PM
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Aaron you aren't going to start talking to yourself are you? ROFLMAO



Eddy Lucast

http://kbs.justoldtrucks.com


man with wooden truck should be wary of "truck whisperer" with torch
kblackav8or
 Posted Thursday, October 13, 2011 1:44 PM
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Aaron you know I am really quite lovable.  :D



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