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Boost Relief Valve +

Ford 7.3L & 6.0L Applications
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Product Description

ELIMINATE the SES light caused by OVERBOOST.


The SES light for overboost will come on at about 25 lbs. causing the PCM to decrease fuel delivery attempting to control the boost.  This condition usually occurs in "chipped" vehicles. Our BRV+ (Boost Relief Valve Plus) will relieve any excess pressure to the map sensor while allowing the engine to receive full boost.  No more SES light and full fuel delivery through all RPM and boost ranges. 

The boost relief valve is installed in the line to the map sensor. This line is located on the passenger side of the engine compartment and runs over the intercooler tube right behind the oil fill tube. Make sure the arrow is pointing towards the map sensor. 

By designing a CNC machined valve, every BRV+ will work flawlessly and exactly alike.  Every valve, in order to work correctly, MUST have a precise orifice sized for proper volume control as well as the blow off valve.  We have machined the BRV+ so that there is no chance of human error when creating the small orifices necessary to make the valves work. You get quality precision pieces, every time. The new valve provides a clean looking installation with less weight. (5.1 oz. vs. 3.7 oz.)

BRV+ ports come plugged in case you're not using them. To install a boost gauge, simply remove one plug and install your boost fitting.  Our pictures below show the BRV+ installed with a boost gauge in each port.  This is done to measure your actual boost and what the map sensor sees at the same time -- this requires two boost gauges.

Special Note: Both ports come from us with plugs installed. Your boost gauge should come with the fittings needed to install a boost line to the valve. Should you not have them, or your gauge did not come with them, these can be obtained at any hardware store. Simply ask for a 1/8" npt (national pipe thread) x 1/8" compression. This is a standard plumbing fitting.




READ THE WEBSITE FOR FULL INFORMATION ON HOW THE VALVE WORKS AND WHAT IT WILL FIX.  An SES light does not just mean overboost.  Please don't waste our time or yours by not reading the enclosed instructions and ALL information found on this website.


Make sure the valve is not STICKING.  You spray a metal lubricant such as WD40 or Amsoil MP into the valve (under the dust cover plate) and work it in by pulling on the ring a few times.  The valve will last indefinitely but may require a light spraying about every year or so - or after sitting for long periods of time. The BRV+ is a mechanical fix to a problem. As long as the valve is blowing off normally, IT CANNOT FAIL in its attempt to prevent the SES light and therefore defueling of your vehicle at boost pressures exceeding 24-25 psi. 


Bottom Line:  If you have the valve installed correctly, and it is not sticking - your chances of having an SES light due to overboost are slim to none.  Make sure that you have SCANNED AND READ THE CODES associated with the SES light you are seeing. There is no such code titled “overboost”, so we cannot help you if you don't have the actual code name and number. 




January 31, 2008 Ryan writes:  Please get mine on the way! I have gauges coming and will use it for that too.  Mostly, I want to get rid of the SES light but now I know my truck might run better after. Thanks for being a sponsor on our Powerstroke forum.  I was looking for something that could do what the BRV+ does and was sick of being cornered into the crap that is out there by vendors pushing their buddies products just because they make money with them or by guys pushing products becuse they have their head up someone's butts. Most of us will only read and don't even post to say what we think anymore because the whole place is swarming with the people that will attack you for saying what you think if it is different that what they are trying to shove down everyone's throat. Thanks for being honest and for building great stuff that real people can use.  It's about time we see a change on these forums to give the real truth from the people that make it. How can I make 55 psi of boost like your truck? 


Why not just use a compressor regulator? Read the tests and view the pictures below.







Question:  Will the BRV eliminate my SES light?

Answer:  If your SES light is caused by OVERBOOST then our unit will fix the problem. What our BRV will NOT cure is an SES light caused by some other code.  To be sure that you have an OVERBOOST issue that our BRV will eliminate you will have to make note of the following the next time your SES light comes on:

  • Does your SES light come on and go back out after about 1 to 1 1/2 minutes?  If so, that's indicative of an OVERBOOST code and we can help you with our BRV to eliminate it.
  • If your SES light stays on until you shut off your truck or comes on and goes back off based on throttle response as you step down or let off the throttle then you do NOT have an OVERBOOST caused SES light. Our BRV will NOT help you in this case.  Check for an ICP code or Exhaust Backpressure code.  A scanner or tuner with diagnostics can find these for you.
  • With our BRV+, you can simply move your boost gauge line to the MAP side of the valve and actually SEE whatthe MAP is seeing. This will eliminate any wonder if the SES light is from overboost.

Question: How do I install a boost gauge using the BRV+?

Answer: You can simply install your boost fitting right into the BRV+ into the respective ports. If you want to see MAP readings or actual turbo boost, you can now do this with no extra cutting of lines.

Question: Why does your valve blow off at 20 lbs. of boost pressure?  I have seen others out there that claim they don't start to blow off until 25 lbs.

Answer: Most likely those vendors may not understand the product they are selling. There are many knock-offs our there since the our original BRVs showed up on the market 6 years ago.  At 17 lbs. of pressure the computer is at 100% fuel map.  Therefore, it is delivering all the fuel that the injectors can deliver - whatever amount that may be based on any upgrades or modifications that you have - if any.  You do not need a valve that blows off at a higher number than 20 lbs. 

Why strive for more boost then? Well, more engine boost provides for more engine efficiency and adds more air to the current amount of fuel therefore adding more power. POWER. POWER. POWER.

Question:  Are you sure that I only need a unit with one valve?  I see another with two valves for sale.

Answer:  A design flaw in the unit we saw with two valves actually dumps off engine boost, not just map sensor boost readings. This is not desirable.  Unlike a BRV+ or even a regulator, you may NEVER reach your maximum set pressure.  Designed correctly, one valve should be ALL that you use to overcome your overboost issues.  Our BRV+ supports our truck's 50+ lbs. of boost!!!  We had the first Boost Relief Valve for the Powerstroke on the market and have a complete understanding of what they do and why.  Understanding the product you sell is the most important service you can provide to your customers. 

Question:  I've heard this is a boost leak. I don't want to loose my hard earned boost. Is this true?

Answer: The BRV+ does "dump" air to relieve the MAP line, but the orifice inside the BRV+ restricts the volume of air entering the valve and the MAP line. The amount of air lost at even 50+lbs of boost would be equivalent to loosing a thimble full in a house full of air. We're not talking about even a fraction of one psi of air. So, to call it a "boost leak" is splitting hairs and looking for a reason to mislead the public.


Question:  I've seen some use simple air compressor regulators. Why shouldn't we use them?

Answer: Below area a few images to help illustrate the problem with regulators. This test was done using a $20.00 regulator from Home Depot. Not a cheap one at all. We hooked up some lines and made a bench test of sorts to measure turbo boost (large compressor gauge) and MAP sensor boost readings (small gauge). We adjusted the MAP regulator to see 22 lbs. when the turbo boost was 30lbs. Consider this an average truck that might be in need of a relief valve. We also checked the calibration of the two gauges and they were within < 1 lb. at 40 lbs. of pressure.

The first step is adjusting your regulator based on your max boost pressure.  We have used a max 30 lbs. of boost for this example. As you can see in the first picture, the boost is at 30 lbs., and the set pressure(MAP) is at 22 lbs. No problems so far. You'll see maximum fuel delivery under these conditions.

Now, We "zeroed" out both gauges to show the location of "zero" on the gauges.

Below we have added pressure to imitate 15 lbs. of boost- the MAP gauge showed only 5 lbs.!

We then increased the compressor to 20 lbs. of "boost" and the MAP gauge only showed 10 lbs.! The MAP gauge didn't reach 20 lbs. until we reached 28 lbs. of "boost".

The regulator actually robs some of the pressure in order to open - as shown above(cracking pressure).  At low boost numbers the two gauges will never give equal readings.  You will eventually reach the set pressure(in this case 22 lbs.) under full throttle, but a regulator is much slower than the instantaneous response you see when using a BRV+.  A regulator and a BRV will show the same max HP figures on a dyno because you run on a dyno at full throttle and max boost at the MAP sensor is already reached before you start taking your readings. However, throttle response on a truck with a BRV+ will be noticably quicker. Again, response is INSTANTANEOUS with a BRV+.

We decided to post more actual boost numbers with our BRV+. We run 2 boost gauges into the BRV+. This allows us see what the BRV+ lets the Map Sensor see as well as actual engine boost.

Here are the details on recent testing done on our 1999.5 PSD:

At anything under 22 psi boost on the main gauge, the Map sensor sees exactly what the engine sees. For instance: at 15 psi of boost the map sees 15 psi - At 22 psi, the map sees 22 psi.  But, even at as high as 54 psi boost, the map sensor still only sees 22 psi. We can see 52 lbs. to 54 lbs. of boost on our company truck under the right conditions.  We run the same boost relief valve we sell - nothing more special. We do NOT get a SES light. We see 22lbs maximum at the MAP sensor. The BRV+ will definitely eliminate issues from overboost in trucks getting over 25 lbs. of boost. 

Important note: We have custom built gauges with tattle tale needles. Max pressure on both gauges can be read and measured simultaneously without having to actually watch both gauges.