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post #1 of 13 Old 06-28-2012, 12:04 PM Thread Starter
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Tuned EGT questions

I've got the Mini Max, MBRP 4" with DPF delete with muffler and EGR blocker(EGT). When I put tuner on "hot", my EGT's spike after around 10 seconds and it starts Defueling. This seams excessive to me. What can I do to lower my EGT to make a full 1/4 mile pull without going over 1450deg? I was thinking of CAI, but I'm almost convinced that's a waste of money. Any thoughts?

Also, even on the "no power added" setting, my truck still blows smoke till the turbo lites up. Is that normal?

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post #2 of 13 Old 06-28-2012, 09:12 PM
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Mine smokes on the no power as well. The one thing I don't like about the tuner is the loss of low end. I feel like they are dumping way too much fuel down low.

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post #3 of 13 Old 06-29-2012, 05:16 AM
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Brief moments over the coveted 1250* is not going to hurt anything. My dodge used to sit on the peg at 1500* and not come off for a few seconds after I let off and it's still running great with 0 blow by even after 220k miles. I've got friends that peg 2000* by the 1/8 and they don't let off till the run is over and none have hurt an engine. Turn the refueling off when your racing and just let her run.

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post #4 of 13 Old 06-29-2012, 06:32 AM
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Quote:
Originally Posted by Scubamax View Post
I've got the Mini Max, MBRP 4" with DPF delete with muffler and EGR blocker(EGT). When I put tuner on "hot", my EGT's spike after around 10 seconds and it starts Defueling. This seams excessive to me. What can I do to lower my EGT to make a full 1/4 mile pull without going over 1450deg? I was thinking of CAI, but I'm almost convinced that's a waste of money. Any thoughts?

Also, even on the "no power added" setting, my truck still blows smoke till the turbo lites up. Is that normal?
I notice the same thing. for a 1/4 mile run my truck usually starts defueling between 60-75 mph.



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post #5 of 13 Old 07-03-2012, 07:19 AM Thread Starter
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Originally Posted by TheBoss View Post
Brief moments over the coveted 1250* is not going to hurt anything. My dodge used to sit on the peg at 1500* and not come off for a few seconds after I let off and it's still running great with 0 blow by even after 220k miles. I've got friends that peg 2000* by the 1/8 and they don't let off till the run is over and none have hurt an engine. Turn the refueling off when your racing and just let her run.
I understand what your saying, but aluminum starts melting at 1350 deg. My ol duramax didn't hit these temps till well after the 1/4 mile mark. Does anyone have any input on a CAI and what it did for there EGT's? I will not let my trucks EGT's go over 1450.... It's not worth it for me, but if there's a way to do it safely! lol

94% of all Dodge Cummins trucks from1992 through 2012 are still on the road today..... The other 6% made it home.....

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post #6 of 13 Old 07-03-2012, 06:20 PM
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Is the DPF delete an open exhaust or does it still have a kitty? My buddy turned one if his pistons onto a convertible running the 1/4 on his d-max, I think he was hitting around 1600?
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post #7 of 13 Old 07-03-2012, 06:54 PM
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You are not going to hurt your pistons by going over 1350* for a few seconds. Mine set on the 1500* peg for over 10sec multiple times and never had blow by or burned oil and has seen over 1300* for 10 years every day of its life for 220k miles. It now currently has 240k miles and still no motor issues.

And for reference, the common rail dodges are melting pistons at 1200* egts because the burn is so efficient that the injectors are basically becoming blow torches. So don't always trust your egts to keep your engine together.

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post #8 of 13 Old 07-03-2012, 09:53 PM
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i'm usin the mini maxx with the egr blocker (EGT kit) as well,
with the programmer gauge settings should it be set on pyro 1 to
monitor the EGTS? just want to make sure i got it on the right setting.



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post #9 of 13 Old 07-04-2012, 07:24 AM Thread Starter
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Quote:
Originally Posted by TheBoss View Post
You are not going to hurt your pistons by going over 1350* for a few seconds. Mine set on the 1500* peg for over 10sec multiple times and never had blow by or burned oil and has seen over 1300* for 10 years every day of its life for 220k miles. It now currently has 240k miles and still no motor issues.

And for reference, the common rail dodges are melting pistons at 1200* egts because the burn is so efficient that the injectors are basically becoming blow torches. So don't always trust your egts to keep your engine together.
So your saying that 1500 deg will not hurt my motor, but 1200 deg can melt the piston? come on dude.... It's not a crap shoot when you lay on the throttle. I don't drive a common rail dodge. I know nothing about them. I drive one of the most technically advanced diesel truck engines made today. It's also one of the most expensive to repair. My chances of having a 200k + mile truck are much better if I keep my EGTs down. Maybe I'm not asking the right questions. What about an upgraded innercooler?

94% of all Dodge Cummins trucks from1992 through 2012 are still on the road today..... The other 6% made it home.....

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H&S Mini Maxx
Deleted MBRP 4" W/Muffler
EGT blocker plate
If it still runs when you delete it, you don't need it!
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post #10 of 13 Old 07-04-2012, 11:13 AM
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No. What I'm saying is the numbers don't matter. And the common rail dodge uses the same fuel system we do, we just have different style injectors. Still 20,000+psi fuel pressure being fired multiple times in a cylinder to produce a super efficient burn. So even though the gauge says the egts are below the magical number, the pistons are still melting. But then you have other situations where your way over the magical number with nothing ever happening. In a drag race your egts are useless. If your towing 10,000lbs up a mountain pass then keep an eye on them.

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