How much boost is too much boost? - Ford Powerstroke Diesel Forum

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post #1 of 23 Old 06-30-2014, 03:36 PM Thread Starter
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How much boost is too much boost?

Just like the title asks guys. I have a 2014 with less than 7000 miles so I'm not interested in replacing a turbo. I'm running an H&S Mini Maxx, 5" Flo Pro and an S&B intake. I have the H&S set to defuel at 23 PSI. When I try to get up and go in a hurry, it defuels rather fast as I hit 23 PSI rather fast. I read other posts about guys hitting 34-35 PSI so I'm wondering if I'm being too conservative. Thoughts?

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post #2 of 23 Old 06-30-2014, 05:08 PM
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I had the same question a while back and 25-30 seemed like a common response. I would leave the defuel settings alone and let the tune limit the boost. I think the low boost setting from H&S would max out at 25 psi for me. Instead of defueling once you've reached 25 psi, you will continue to accelerate but the boost would be limited to 25 psi. That way it won't beep at you and what not.
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post #3 of 23 Old 06-30-2014, 07:05 PM
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I would suggest staying right where you are. I would say that you are getting the safest amount out of it and probably the biggest bang for the buck. Turning it up for a little more could very well be a crap shoot.

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post #4 of 23 Old 07-01-2014, 04:52 AM
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Yeah these turbos are known to grenade under high boost stress. I'd leave it alone or raise it to 28 or something like that. But that's it.


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post #5 of 23 Old 07-01-2014, 09:44 AM
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Mine hits 32psi when pulling my camper. It kinda worries me. Didn't know u can lower the amount of boost the mini maxx will go too. I knew it could defuel at a set psi.


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post #6 of 23 Old 07-09-2014, 10:53 PM
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I recently switched to the H&S engine tune on the lowest boost fuel setting and my boost maxed out at 24 psi every time, without defueling.
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post #7 of 23 Old 07-10-2014, 06:15 AM Thread Starter
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I just switched to Gearheads tunes. First of all, I absolutely love these tunes. Stomping on it pretty good I'm not seeing over 24 so I'm happy with that

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The list goes on and on and on

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post #8 of 23 Old 07-10-2014, 09:32 AM
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The pedal feels different using the H&S tune, I like the way Gearheads felt more. I switched back to H&S because I was getting too much smoke with Gearheads engine tune. I can't remember if there was a low boost fueling option with Gearheads tune, but I may switch back anyway.
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post #9 of 23 Old 07-10-2014, 02:43 PM
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Quote:
Originally Posted by Dantron View Post
The pedal feels different using the H&S tune, I like the way Gearheads felt more. I switched back to H&S because I was getting too much smoke with Gearheads engine tune. I can't remember if there was a low boost fueling option with Gearheads tune, but I may switch back anyway.
To much smoke with gearhead?!?! Wow maybe you should tell Matt.

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post #10 of 23 Old 07-10-2014, 03:24 PM
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Quote:
Originally Posted by Cheap6.7 View Post
To much smoke with gearhead?!?! Wow maybe you should tell Matt.
Yeah. It will sh!t out a thick clump of smoke everytime I punch it trying to miss a red light. I'm using the H&S tuning right now with the level-3 boost fueling and it never lets out thick smoke like that. I'm going to reload the Gearhead tunes and see if it gives me a low boost fueling option at the beginning, like the H&S tuning does.
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