A couple of questions about power.

[Nick from Nebraska]

Hey everybody thanks for all the help so far this site has been a great resource.

Alright, here's the first question: If you turn up the fuel does it raise rpm for a given foot position or does it increase torque at a given rpm?
Secondly, with a new harmonic balancer and good general maintenance what's the chance of significantly shortening the life of my engine with say, 1/8th of a turn of increase?
Finally, with said 1/8th turn, an open air intake, and open exhaust what sort of power increase could I expect?

Thanks for any help,

Nick

P.S.
I have a well known talent for leaving out necessary Information so by all means tell me what I need to add.

 

[biscuitwhistler37]

Which engine/aspiration are we talking about?

 

[nyoffroad]

Hey everybody thanks for all the help so far this site has been a great resource.

Alright, here's the first question: If you turn up the fuel does it raise rpm for a given foot position or does it increase torque at a given rpm?
Secondly, with a new harmonic balancer and good general maintenance what's the chance of significantly shortening the life of my engine with say, 1/8th of a turn of increase?
Finally, with said 1/8th turn, an open air intake, and open exhaust what sort of power increase could I expect?

Thanks for any help,

Nick

P.S.
I have a well known talent for leaving out necessary Information so by all means tell me what I need to add.

With all those above mentioned 'improvements', I think you should gain a tire burning -head snapping couple of horse power. The 6.2 was never designed to be a powerhouse and no matter what you do it never will, or it never will for very long!
By all means a new dampener and a cool air intake and free flowing exhaust will help a LOT as will turning up the pump.
Turning up the pump increases the amount of fuel and will not increase RPM's
You are dealing with a low HP engine, (130 HP?) so a modest 10hp will be felt!
I still believe doing what you're doing with the addition of an overdrive transmission and slightly larger tires is the key to CUCV happiness.
With that being said I haven't got my turbo'd 6.5 going yet.

 

[Nick from Nebraska]

Which engine/aspiration are we talking about?

I've struck again!

its a 6.2 NA with a modified intake and open exhaust.

 

[adf5565]

Could you share what your modified intake is?

 

[Nick from Nebraska]

Could you share what your modified intake is?

Sure, I saw on a thread somewhere that removing the top half of the air cleaner cover and replacing it with something flat -Therefore allowing air to enter from all sides- would give a slight efficiency and power increase at the cost of a louder engine and shorter filter life. I have access to cheap filters and the local rural cops are cool with a bit of rule bending noise wise, so why not?

 

[Barrman]

As pointed out above, the 6.2 was not designed to be powerful. It was designed to fit in the same place as a gas V8, have the same power as a 2 barrel 305 and get twice the mpg. It does that perfectly!

It was also designed and used in a time when 55 mph was the law of the land.

More air in is always better for an engine. Especially, a diesel. Your open element air filter top and small IP fuel rate increase might equal out so you don’t get any black smoke. Black smoke is unburnt fuel and is a bad thing for an indirect injection engine like the 6.2.

You will probably get some seat of the pants feel of increased power. But, there will always be a hill that will have you down to 24 mph on the floor with black smoke coming out both pipes in an empty truck. The only real fix is a turbo if you want to charge every hill. Probably not what you wanted to read, but that has been my experience.

If you are ok getting slowed down on the occasional hill. Do your mods and just enjoy the dependable simple 6.2.

 

[Buck69]

I don't think adding warm air from the engine compartment will gain you anything more than dB's. Cool air is required for better combustion.

 

[Tinstar]

If you turn your pump up, that means more fuel.
More fuel means more heat.
The 6.2L does NOT like to get hot.
Be prepared for new head gaskets or worse.

As stated above, it was designed for convoy speed of 45 mph and to haul and tow its rated load and get good fuel mileage. That’s it.
A good hill will slow you down even when empty.

Guys buy these trucks and think just because it’s a diesel, it can do a lot.
A Duramax/Cummins it is NOT.

My favorite is the person who bought a CUCV, installed a 5th wheel hitch, and hooked up a gooseneck trailer with a backhoe on it and then complained the truck couldn’t really tow it and was low on power.

Understand what you have and its design capabilities and limits.
You’ll be happy and your CUCV will last longer.

 

[nyoffroad]

I don't think adding warm air from the engine compartment will gain you anything more than dB's. Cool air is required for better combustion.

Yep, the cooler the air the better, not only does it help cool the engine but cool/cold air is denser, meaning it has more O2 per cubic whatever.

 

[WWRD99]

Hey everybody thanks for all the help so far this site has been a great resource.

Alright, here's the first question: If you turn up the fuel does it raise rpm for a given foot position or does it increase torque at a given rpm?
Secondly, with a new harmonic balancer and good general maintenance what's the chance of significantly shortening the life of my engine with say, 1/8th of a turn of increase?
Finally, with said 1/8th turn, an open air intake, and open exhaust what sort of power increase could I expect?

Thanks for any help,

Nick

P.S.
I have a well known talent for leaving out necessary Information so by all means tell me what I need to add.
[/QUI

I wouldn't mess with the fuel. You really won't get much out of it and the chances of messing up the ip are pretty high. The power you may get won't be worth it. These engines do exactly what they were designed to do...start and get you there. Even with a turbo it still can't compete with Grom speed wise. I get you want to make it the best it can be so doing that is keeping the basic parts in good condition. If you want to get nuts on a expensive harmonic balancer you can get the fluid damper brand and be done with it. Pop a new seal in the front cover too. Have you looked at your motor mounts yet? You may need those? Can spend your efforts on parts that will keep it going.

 

[CARC686]

My experience with an open element filter on the 6.2: Blowby flows right through the tuna can, out the intake, gets sucked in the windows or the HVAC, and blows directly in my face. My dog doesn't like to get in the truck anymore because he knows it's a gas chamber. The airbox strangling the intake creates crankcase vacuum that keeps the ancient rubber in your engine from leaking. When I opened up the intake, every seal on my engine began to seep, weep, or puke. I used to think the engine got a lot louder, but I can't hear it anymore. A good mod if you don't like to talk while you drive. My throttle response was probably better. I honestly don't remember. My strongest memory is that it was louder.