Ways to lower egts - Ford Powerstroke Diesel Forum
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Old 09-08-2013, 05:38 AM
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Ways to lower egts

Hello,

The wife and I use our truck to pull our fifth wheel. The last couple times out we experienced turbo surge while pulling on grades. After a bit of research I had a mechanic install a wicked wheel. Since then, I've noticed like many others with a ww that my egts have crept up, 75-100 degress while cruising on the freeway. I don't know if that will stay linear while towing, go up or maybe down due to more boost but we're going on another trip here very soon and I guess I'll find out. I can manage the egts fairly well by adjusting my driving style but was wondering, what sort of mods could be done to help lower those temps back to where they were with the stock compressor wheel? I don't want to do anything exotic and whatever I do has to be CARB compliant or at least look stock enough that the smog police won't fail the truck. Any ideas?
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Old 09-08-2013, 05:50 AM
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aftermarket or free'r flowing exhaust will help. I beleive a aftermarket intake but not for sure. A aftermarket intercool would help out alot and I thing the water methanol would be the most effective.
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Old 09-08-2013, 06:14 AM
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which ww did you install? The new ww2 from dieselsite is supposed to lower egt's.
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Old 09-08-2013, 06:17 AM
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Thanks, I have the intake and a free flowing muffler (BTM). Don't want to do water injection. Kind of zeroing in on the intercooler but that seems to get mixed reviews. Hoping to hear from some who have installed a 6.0 intercooler and have actually measured good or not so good results.
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Old 09-08-2013, 06:18 AM
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Just the standard WW. At the time the billet wheels were all backordered.
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Old 09-08-2013, 06:26 AM
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Is the truck running on stock tuning, or are you running a performance /tow tune?
I know that EGT's are a killer and the quickest way to run EGT's up is adding more fuel. Transmission only tunes give the sensation of more HP (+-25) by maximizing the hp and torque curves of the stock engine.

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Old 09-08-2013, 07:25 AM
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How bout a few numbers.
What rpm are you pulling the grade?
What boost pressure are you seeing?
What exhaust temp are you seeing?
How fast are you trying to pull the grade?
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Old 09-08-2013, 08:08 AM
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Don't waste your money on the IC the benefits aren't worth the cost. What are your readings? If they aren't near 1200 don't worry about it. Most use 1250 as redline, but the truck will run all day long at 1200. If you are climbing a grade and see temps climbing but you are 1/2 mile from the top stay in it. You can have short bursts above 1400 with no damage, it takes aprox 2 min to heat soak the pistons.
Only thing that will really lower the temps is better airflow and water/meth injection. I would install the Ford AIS, I have run this with the BTM since 2003 and never had a problem with EGT temps. Your plumbing is fine, no need to go to 4 inch unless your 3.5 is totally shot.
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Old 09-08-2013, 08:15 AM
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One thing that just occurred to me is the factory downpipe on the 7.3 is rather flat and constrictive. The 3.5" exhaust can be sufficient w/o the stock muffler. Bigger is better though.

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Old 09-08-2013, 08:19 AM
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The OBS DP is flat, the SD DP is ok.
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