RT Tuning Question

[4kids2dogs&RV]

Noticed this yesterday on the way to work, never noticed it before so figured I'd ask.

I've got a 2011 2500, 68RFE with WARP tuning by @Double R Diesel. My ECM file is a 120hp tune. Truck runs great, no complaints.

I was stopped at a light and decided I wanted to change to my 12V 120hp sound tune. But before it finished loading, the light turned green and I started to accelerate. but as I let off the go pedal, the boost went into the negative range, roughly -4.50.

Is this because the boost readout zero's itself when programming or is there a problem?

On the way home, I left it on the ECM tune and never saw the negative readout again.

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[DRD]

Noticed this yesterday on the way to work, never noticed it before so figured I'd ask.
I've got a 2011 2500, 68RFE with WARP tuning by @Double R Diesel. My ECM file is a 120hp tune. Truck runs great, no complaints.

I was stopped at a light and decided I wanted to change to my 12V 120hp sound tune. But before it finished loading, the light turned green and I started to accelerate. but as I let off the go pedal, the boost went into the negative range, roughly -4.50.
Is this because the boost readout zero's itself when programming or is there a problem?

On the way home, I left it on the ECM tune and never saw the negative readout again.

Under the right circumstances your truck can be off boost and the engine can actually produce manifold vacuum which would show up as negative boost.

Ray
Double R Diesel, LLC
www.doublerdiesel.com
info@doublerdiesel.com

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[4kids2dogs&RV]

I hear what you are saying Ray, but should I not change to a RT tune while driving down the road with my foot on the go pedal?

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[DRD]

I hear what you are saying Ray, but should I not change to a RT tune while driving down the road with my foot on the go pedal?

Technically nothing wrong with changing RT tunes while driving, but I wouldn't do it for safety reasons alone.

Ray
Double R Diesel, LLC
www.doublerdiesel.com
info@doublerdiesel.com

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Granger40 What is the rt tune just installed and wondering what that is thanks

11-06-2022

[4kids2dogs&RV]

Technically nothing wrong with changing RT tunes while driving, but I wouldn't do it for safety reasons alone.

Ray
Double R Diesel, LLC
www.doublerdiesel.com
info@doublerdiesel.com

Safety reasons? Other than looking away from the road, what would be the concern?

If there is nothing to worry about while driving, try to duplicate it... I'm just trying to understand so I don't over boost my engine, I don't have head studs yet.

For example... You are driving down the road cruising along with 10 PSI showing on the gauge. You change to your 12V tune and as soon as the display resets, now the boost is close to zero. You let off the pedal and idle and you're now at a -10 PSI.

I'm just worried that if for some reason, I have to get on it and my boost goes to 31 PSI, am I truly at 31 or am I really at 41?

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[DRD]

Safety reasons? Other than looking away from the road, what would be the concern?

If there is nothing to worry about while driving, try to duplicate it... I'm just trying to understand so I don't over boost my engine, I don't have head studs yet.

For example... You are driving down the road cruising along with 10 PSI showing on the gauge. You change to your 12V tune and as soon as the display resets, now the boost is close to zero. You let off the pedal and idle and you're now at a -10 PSI.
I'm just worried that if for some reason, I have to get on it and my boost goes to 31 PSI, am I truly at 31 or am I really at 41?

LOL! Yes when I say safety I mean don't take your eyes off the road. I've done it myself and almost rear ended someone.

Don't be concerned about boost reading negative. A boost reading of 31 psi is accurate. You will never see 40 psi on a stock turbo with my tuning...roughly 36 psi max is all you could ever see.

Ray
Double R Diesel, LLC
www.doublerdiesel.com
info@doublerdiesel.com

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[4kids2dogs&RV]

LOL! Yes when I say safety I mean don't take your eyes off the road. I've done it myself and almost rear ended someone.

Don't be concerned about boost reading negative. A boost reading of 31 psi is accurate. You will never see 40 psi on a stock turbo with my tuning...roughly 36 psi max is all you could ever see.

Ray
Double R Diesel, LLC
www.doublerdiesel.com
info@doublerdiesel.com

Copy that, just wanted to be sure, kind of grabbed my attention at first.

Thanks Ray, Best customer service ever!

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[theaaronbush]

I see the same read outs on my 2012...mine has never performed differently even under vacuum. It does only seem to do it in the 12v RT just like your's. I even cleaned the sensor to make sure it wasn't dirty and still read the same so I could only assume it was correct due to the truck still performing great. Glad you got an answer and no one better than Ray to answer that question.


Sent from my iPhone using Tapatalk

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[HKBIGDADDYDIESELDAN]

Under the right circumstances your truck can be off boost and the engine can actually produce manifold vacuum which would show up as negative boost.

Ray
Double R Diesel, LLC
www.doublerdiesel.com
info@doublerdiesel.com

Once again Ray from Double R Diesel has all the right answers

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[Kansas_114]

It's not just Warp tunes that do this, I've noticed the same problem while switching between box tunes. The boost gauge on the RaceMe resets its zero whenever you change tunes. So if you're holding a steady 15psi while changing tunes with RT, you'll show -15psi at idle which is actual zero.

It's a glitch that should be fixed. It isn't the engine, is the gauge that's off.

Best thing you can do right now Is while changing tunes with RT, don't be creating boost.

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