Has Anyone Already Installed Gauges on the 6.7L Engine???

[PaulBarker]

CEly, Obviously they did not have the 6. 7 in Mind when they built those gauges. I see the Red Zone starts at 1300 on your pyro.

 

[CEly]

That is actually a genuine concern of mine. If my 02 7. 3 PS saw 1300* I'd be backing down on the throttle, with this 6. 7 I'm honestly not sure what to consider dangerous. When it regens anywhere between 1200* and 1600* for any length of time it drives me NUTS! Spend more time watching the pyro than anything. Maybe I would have been better off not installing the pyro and avoided the stress!

 

[MCummings]

Maybe I would have been better off not installing the pyro and avoided the stress!

That's why they don't come with them from factory.



Think of a minivan dash. Speedo, fuel, water temp. That's all you need. Apperantly Cummins isn't very worried about these motors getting worked to hard or getting the EGT too hot as no measures were taken to prevent excessive EGTs. Gasoline engine manufacturers are worried about fuel knock, overheating and over revving, and take precaustions and make limitations for those items, but Cummins doesn't think it's an issue, and other than "watching EGT" I don't think the EGT gauge is necessary, and I think it would be detrimental to regens and DPF performance to "backoff the throttle" whenever EGT's got very high.



The towing temps won't be much higher, in fact, they may even be lower since you are able to really heat soak all the exhaust and get it nice and clean.



Merrick

 

[ENafziger]

If I understand things correctly, the high temps seen during regen may not be as bad as first appears.

The EGT limits we have be used to dealing with up until now have generally been associated with performance mods, which either increase rail pressure, advance timing, increase duration, or a combination of the above. These 3 factors allow more fuel to be injected earlier, thus providing gains in efficiency (due to timing), and power (due to more fuel being injected).

Thinking along these lines, there exists a comparitively long period of time that high combustion temperatures are seen in the cylinder, and thus, much heat is absorbed by the piston, head, etc. Most melted pistons result from a combination of high EGTs and lots of timing.

However, the high temps seen during regen are most likely stemming from opening up the duration of the post injection event (greatly retarded timing in reference to TDC); thus, the piston and head don't "see" this high temperature nearly as much, because the fuel is being burned as the exhaust valves are opening. The attempt here is to push heat out of the cylinder to promote high light-off temps in the DPF.

Because of the placement of the thermocouple, very high EGTs are indicated during regen. However, this does not necessarily mean that dangerous thermal loading of the piston is occuring... because the residence time of this heat in the cylinder is so low comparitively speaking.

At least that's how I understand it to be...

--Eric

 

[Coalsmoke]

If I understand things correctly, the high temps seen during regen may not be as bad as first appears.



The EGT limits we have be used to dealing with up until now have generally been associated with performance mods, which either increase rail pressure, advance timing, increase duration, or a combination of the above. These 3 factors allow more fuel to be injected earlier, thus providing gains in efficiency (due to timing), and power (due to more fuel being injected).



Thinking along these lines, there exists a comparitively long period of time that high combustion temperatures are seen in the cylinder, and thus, much heat is absorbed by the piston, head, etc. Most melted pistons result from a combination of high EGTs and lots of timing.



However, the high temps seen during regen are most likely stemming from opening up the duration of the post injection event (greatly retarded timing in reference to TDC); thus, the piston and head don't "see" this high temperature nearly as much, because the fuel is being burned as the exhaust valves are opening. The attempt here is to push heat out of the cylinder to promote high light-off temps in the DPF.



Because of the placement of the thermocouple, very high EGTs are indicated during regen. However, this does not necessarily mean that dangerous thermal loading of the piston is occuring... because the residence time of this heat in the cylinder is so low comparitively speaking.



At least that's how I understand it to be...



--Eric

Exactly, which is also why we now see the water cooled bearing housing on the turbo.

 

[Cattletrkr]

More pics/ideas?

Anybody know of anything digital? Commander?

 

[Cattletrkr]

Just got off the phone with Edge. Sounds like there's gonna be an Insight in my future.

 

[Coalsmoke]

I'm not sure if I mentioned this or not, but I'm running an Edge insight on mine. All in all it works good, but it has a few issues right now with their software that they have to fix.

 

[Coalsmoke]

I can take a picture of my Edge sitting in the dash mount if someone wants.

 

[Diesel Manor]

We finally put up gauge install instructions on our site. Here you go:



DieselManor - Installation Sheets

 

[caddo_diesel_fan]

Say, for you guys who have gauges installed, and have the 6-Spd manual transmission, do you have pictures of how you routed the gauge wires through the firewall?



Just picked up my truck yesterday, and will soon be adding at least EGT and Boost gauges. Also, thinking about a fuel PSI gauge.



Thanks.

 

[HBarlow]

We finally put up gauge install instructions on our site. Here you go:



DieselManor - Installation Sheets

Diesel Manor,



Thanks for providing these for members. Great instructions and photography. Everyone should bookmark your website.

 

[Diesel Manor]

It's our pleasure. We like to sell products, but service is important too. By having the easy to foollow instructions it lets everyone know that we don't just treat our products as buy and sell items. We actually install them and therefore know the issues and differences of the products. I think gauges are one of the most helpful items to have instructions on. All exhaust and intakes come with good instructions from the manuf. , but gauges do not.

 

[FrankA]

gauges? to do or not to do?

I own an '07; 6. 7; 68RE; auto. I use the truck mainly to haul my trailer (about 8000lbs) up and over passes here in CA. and plan to do a transAmerica thing in the near future. I don't plan on making any engine mods (chips etc. ) but will keep it pretty much stock. Do you recommend gauges? If so, which ones to measure what? EGT? transmission? other?

thanks-

frank

 

[Diesel Manor]

Yes. For towing it is always a benefit, especially if going through the mountains. The transmission can get quite hot and having a trans gauge is important IMO to know what's going on in there. The pyrometer (EGT) gauge is also beneficial, not just to monitor the temps coming out of the cylinders, but along with the boost, it can be used to help you efficiently keep the engine running at an optimum speed/temp range, if you will, so that you can get the most out of the motor. What I mean is (example), if the engine is lugging, you'll notice that EGTs are climbing, and boost is falling. You can manually downshift and the EGT's will fall and boost will increase.

I also use my boost gauge every day to help me maintain fuel efficiency. I try to keep the boost down when daily driving.

 

[mattymac]

Say, for you guys who have gauges installed, and have the 6-Spd manual transmission, do you have pictures of how you routed the gauge wires through the firewall?



Just picked up my truck yesterday, and will soon be adding at least EGT and Boost gauges. Also, thinking about a fuel PSI gauge.



Thanks.

on my 04 I just made a small hole in the grommet where the slave cyl comes through, basically just off to the side of the shaft.

 

[Coalsmoke]

on my 08 I found a rubber plug with a single wire coming through the fire wall, I think it was over near the clutch, about half way up the firewall.