Engine Module

[MyPrevost]

We now offer a very well developed engine power enhancement module.  The Steinbauer company has a lot of history and applications for their units.  You gain 20% more power, making the coach pull those hills better.  The system does not interfere with any of the detroit engine systems….check them out.

Steinbauer

 

Jeff Rowe East Tennessee Luxury Coach 126 Horne Dr.Vonore TN 37885 423-884-6008

[MyPrevost]

Jeff,

Good info, but your link didn’t work, but I used this link to get to their site:  https://www.steinbauer.cc/us/

I also viewed a video on UTube in reference to Motorhomes.  Interesting, especially if you live out West in the Rockies:  https://www.youtube.com/watch?v=vfOghWXITXE

Tim & Cindy
’01 Marathon H, 696 (Sold)
’14 Jeep GC (Sold)
“Travel with a Purpose”

[MyPrevost]

Which model year engines does it work on?

Mark & Kristi
Jasper, TN
2022 Newmar King Aire
2021 Jeep Wrangler Unlimited

[MyPrevost]

OK, I’ll play the part of the naysayer.

Before anyone has had this system installed has a benchmark for performance been established? I am talking about timed acceleration, hill climb data, fuel consumption, etc. This data needs to be from a large block of time such as mileage data, and multiple performance measurements such as timed accelerations or hill climbs.

It is easy to make a lot of claims. What is not so easy is backing up the claims because there is a lot of factors that not only impact performance, but also the engine health.

 

I could not get the video to play so I do not know what is being claimed or how they deliver the performance.

Jon and Di 2006 Liberty Elegant Lady, 2021
Jeep Grand Cherokee, 1950 Ford
Knoxville, TN

Owner of three Liberty Coaches since 1990

[MyPrevost]

I fixed the link for the rockie…

Tom & Nancy
7 Prevosts Owned

[MyPrevost]

I got to the site OK, but I can’t get the videos to play.  Jon must be trying to watch the videos on his flip phone and has the Steinbauer website all locked up this morning.

I was awfully surprised to see a massive farm tractor when I took the link.  Was NOT expecting that at all.  But then after a few seconds of looking at the more massive farm implement behind the tractor, I realized that farmers need LOTS of power to effectively work their fields.  This should be interesting … especially when Jon is done watching the videos.

Dick & Cathie Karth
1999 XLV Liberty Elegant Lady #405
Have CDL — Will Travel
Shawano, Wisconsin
Member of the Prevost rescue squad
Owner of one Prevost since 2014 … tries not to make things up

[MyPrevost]

They just increase the injection time, putting more fuel in the cylinder. They offer a module for each displacement and power configuration of Detroit engine. Example: mine is a 12.7 liter series 60 fueled to make 430hp. The Steinbauer part number for that app is 220061.

Some questions: more power = more heat, cooling capacity?  After treatment component affects?  Drive train/transmission torque capacity.

Dan and Barb 2004 Royale XLII Huntley, Illinois
Grand Cherokee CRD, 911 GTS, C43 amg

[MyPrevost]

Morning guys,

We’ve had the Steinbauer module since either 010or 011 and it really made a big difference on overall performance.

Our good friend and diesel mechanic recommended it because thought if I had the option to turn it up I might be a little overzealous with it :).

Our mileage towing at that time was 4.6 and we can do 5.6+ no problem. Have had legs where we were in the 6.5 range when we were in Ca and speed limit was 55.

All in all we are happy and would do it again.

Looking at the tables online it really puts the Volvo up there in torque and horsepower as well.

Hope this helps,

Chris

Chris2004 Featherlight2008 Hummer H2

[MyPrevost]

Chris,

I don’t doubt there is a benefit, but I think it needs to be quantified. When the guys were buying the Ugly Fix their claims were up to 1 1/2 MPG increase. That was bogus because the bottom line is about .5 MPG. That is still not a bad improvement, but it is nowhere near what people would expect.

When Parliament first advertised their fuel additive their claim was a 15% increase in fuel mileage. Again I called BS and they allowed me to test it. (At my expense BTW). After almost a year the improvement in mileage was nil.

We all want more power and less fuel burn. But I will not pay $50,000 to get a 5% improvement in power and economy, but I would pay something which is why I would like to get numbers.

Jon and Di 2006 Liberty Elegant Lady, 2021
Jeep Grand Cherokee, 1950 Ford
Knoxville, TN

Owner of three Liberty Coaches since 1990

[MyPrevost]

I am getting more data that I can post, however this is the real deal…I started looking after I was not happy with the ugly fix and what it was and was not doing….This is available for all engines, ordering one for my dodge as a daily driver and driving 45 minutes each way daily I can see what I am getting consistantly also….

Jeff Rowe
East Tennessee Luxury Coach
126 Horne Dr.Vonore TN 37885
423-884-6008

[MyPrevost]

Jeff,

That opens up a line of questions………first, we know the EGR burns more fuel because when it goes into EGR mode the fuel flow is increased along with turbo boost to compensate for loss of power that will occur when the engine is trying to run on exhaust fumes. Does this module “delete” the EGR? By deleting I mean does it disable it so that is not inhibiting performance and eating up mileage.

I understand that there are many ways to “tune” a diesel, and any one change such as increased fuel flow forces additional changes such as timing. Those changes then increase the heat of combustion (which is why the EGR is there in the first place) and in turn that increased heat brings about the need for another timing change. Where I am going with this is some performance boosters come at the expense of engine longevity. Some can be very damaging because they increase internal cylinder pressure which is typically an increase in power if done right, or detrimental if done wrong. Some clues are the EGT but we no longer have pyrometers on our engines to measure exhaust gas temps.

Our mutual friend turned up my fuel flow, changed the timing and the result was an increase in power such that at normal driving my downshifts were significantly reduced. I failed to get some baseline data because I did not know the changes were going to be made the day they were done, but I know I am burning clean, saving fuel, and can top Jellico mountain southbound at the speed limit towing the Hummer which I could not do previously.

Jon and Di 2006 Liberty Elegant Lady, 2021
Jeep Grand Cherokee, 1950 Ford
Knoxville, TN

Owner of three Liberty Coaches since 1990

[MyPrevost]

I would be interested in finding out how it interacts with those of us who have aftertreatment on our engines.  I do not have DEF, but do have a particulate filter and catalyst and do regenerations.  Do these things work under those parameters without screwing anything up?

I ask because almost all of the other solutions stopped prior to the 2007 EPA engines.

Mark & Kristi
Jasper, TN
2022 Newmar King Aire
2021 Jeep Wrangler Unlimited

[MyPrevost]

I had Jeff install the engine module on my coach earlier this month. I have a 2007 Marathon H3 on a 2006 chassis. Series 60 with EGR (ugly fixed). First impression is that there is significantly more power. Drove Chattanooga to Bella Terre and back. No more losing speed on the up hill sections of 59 and 65. Early acceleration seem much improved. Mileage normally on this trip on the DDEC is 5.8 for the whole trip. This one was 6.4. As this is one trip I would not put much stock in that increase until I have several trips of varied terrain. I did not notice any change from my usual engine temp or other readings. No engine smoking.

As Jon would point out, impression and fact can be very different. In the next month I hope to run some tests of acceleration with and without the module plugged in to get some actual data to see if my impression is what is really going on. When I get the tests done I will report the results.

The install takes at most 30 minutes as the module just plugs in between the DDEC and the engine control port. Price, you’ll have to check with Jeff as I do not know if the price varies by coach engine vintage etc.

Chris

Chris Yetter
2007 Marathon H3 3S.
2015 Jeep Wrangler

[MyPrevost]

Hi Jon,

This is Jon as well! A couple of years ago, I asked you some questions when I was looking for a coach. You were very helpful, and I highly respect your opinion, so I’m turning to you once again for guidance.

I purchased a 2006 Liberty Elegant Lady, and I’m now dealing with a persistent “check engine light” problem that Prevost Mira Loma hasn’t been able to resolve.

The issue occurs while climbing 4%-6% grades, especially when I’m using cruise control (it seems like cruise allows the coach to climb better than manual acceleration). When the transmission downshifts to 3rd gear, the check engine light comes on and stays on for about 30 seconds before going off. If I’m still pulling the grade, the light cycles back on and off. On flat highways or minor grades, the light doesn’t come on.

The codes I’m seeing are:

39 147: VNT Vanes not responding – Boost Power
39 147: VNT Vanes not responding – EGR
44 172: Air inlet temperature high
Here’s what has been done so far:

Mira Loma’s Diagnosis: They pulled the engine performance data and said the EGR was stuck open, causing the engine to pull in hot exhaust during heavy strain, instead of cooler air. They replaced the EGR and the cooler (since the bolts broke off). However, after a road test, the check engine light still came on, and the coach wasn’t coming out of EGR mode.
Valley Detroit’s Inspection: Prevost sent the coach to Valley Detroit, where they reprogrammed the ECM, reset engine parameters, inspected the harness, and checked for issues, but they found none. They noted that the injectors were slightly overfueling, but still within spec.
After all this, I picked up the coach for a short trip to Montana, but the check engine light came on and off at every grade between California and Montana. I returned the coach (without paying the bill yet) for further investigation.

I also had an Ugly Fix installed, which was supposed to bypass the EGR and resolve the problem, but after a test drive, the check engine light still comes on.

I’ve searched for threads and solutions on these codes but haven’t had any luck. I’m currently sitting at Prevost Mira Loma as I type this, hoping for some direction.

Do you have any advice, solutions, or know someone who has dealt with this specific issue?

Thanks in advance for any help you can provide.

Best regards,
Jon P
2006 Prevost XLII Liberty Elegant Lady Titanium
2018 Jeep Grand Cherokee Overland Toad

[MyPrevost]

Jon,

I might be able to help.  When I can get back to the bus to see my service log.   I had similiar issue codes the same with the exception of I don’t think I had the temp.  It took about 6 – 7 months and three places to finally figure it out.  Was a faulty sensor of some sort… i have the numbers and stuff and my coach is close to yours so it might help.

Is your engine derating when you get the check engine?   Mine did and it wouldn’t reset until I power down and restarted.

Bill

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