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post #1 of 29 (permalink) Old 07-20-2010, 12:58 AM Thread Starter
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Tuning Question

When you have a 6.0 tuned with no head studs, is it the boost that ultimately blows the head gaskets or is it the pressure made from the extra fuel being put into the motor and faster rpm's ? I have an 06' that has no head studs but is tuned, I am just curious if there is a difference in how the truck will hold up with a stock head configuration if you don't always put your foot to the floor. Or is it just an inevitable problem you are gonna have........

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post #2 of 29 (permalink) Old 07-20-2010, 03:09 AM
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post #3 of 29 (permalink) Old 07-20-2010, 01:32 PM
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More power=higher pressure no matter how its achieved. Pulling a higher gear with added power/tuning, where it pulls like a frieght train puts the most strain on the head bolts. Its a gamble even running stock with these trucks, some can run tuned for all there life without popping the gaskets. Everyone drives there trucks differently, but I would say its possible to run tuned and not have an issue, if the tuning is right for the driving style, but the risk factor is increased. Harry

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post #4 of 29 (permalink) Old 07-20-2010, 09:37 PM Thread Starter
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Yea I can see what you guys are saying. I have 221,000 miles on my 06' and it runs great still. I just put the tuner on it a couple wks ago. I kinda figured that the added fuel and more powerful combustion was more dangerous than pulling high boost. I take it that the "powerstoke" is more harmful than the "compression" stroke!! lol
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post #5 of 29 (permalink) Old 07-22-2010, 11:07 PM Thread Starter
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Also, is there anyone out there who is running a tuner with stock head bolts that hasn't had any problems??
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post #6 of 29 (permalink) Old 07-23-2010, 04:57 PM
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There are lots, but they are running on borrowed time. I stopped running one until I get studs put in. Depends on the power level and timing the tuner likes to use.

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post #7 of 29 (permalink) Old 07-23-2010, 07:34 PM
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I loaded our tuner onto the Excursion before I added head studs. The minute I did that, she began burping coolant. I even had my tuner go very mild with the tune. We never pulled any trailers with the Ex, never got into high boost situations. We just cruised down the highway with it.

I had the EGR deleted first, but she still burped coolant. Now that the studs are done and the oil cooler replaced...not a drop has been shed since.

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2004 Excursion Limited 6.0L, Dipricol gauges on the A-Pillar, Bilsteins and BFG's on the corners, lost EGR (not looking hard for it either), ARP studs, RCD Black Onyx head gaskets, MBRP 4" exhaust, (labor performed by Dan @ Midwest Transmission) **giggled when traded**

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post #8 of 29 (permalink) Old 07-25-2010, 09:39 PM
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Quote:
Originally Posted by Bcarriveau View Post
Cylinder pressure is what lifts the heads
Mostly caused by excessive timing! Of course added power does also but with good tuning added power doesn't equate to excessive issues.

Mike
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post #9 of 29 (permalink) Old 07-29-2010, 11:58 PM
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High CP's!...... In my 2007 the trans tuning and excessive timing killed the head gaskets. The truck would lock the TC and not down shift and the damn thing would puke so bad cars behind me would have to turn on there windshield wipers. It would do it with low boost and low RPM's every time. Be carefull with the custom tunes and make sure they dont get all there power from the timing.... Excessive timing and locked TQ @ low RPM's = High as hell CP's....

Lonnie
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post #10 of 29 (permalink) Old 07-30-2010, 12:47 AM
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I've ran a bullydog on all power settings except crazy larry for 165K miles so far with no head gasket issues. I do have the EGR unplugged and a 4" t-back.?

Last edited by RatherBNtheWood; 07-30-2010 at 12:53 AM.
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