Try it free for 14 days. View Full Image. Diesel Power Magazine how to. Before turbocharged diesels hit the truck market, you had few choices. Either you bought a 6. As ofChevy, Dodge, and Ford all offer packages with hp or more, while meeting much stricter emissions standards.
The aftermarket has embraced turbocharging as well, with plus-horsepower becoming an everyday figure. Turbocharging is the biggest single reason why today's diesels can achieve these power levels, so with that history in mind, let's take a closer look at how the single most important part on your engine works.
The Basics On an average day, air pressure at sea level is about When an engine is turbocharged, the turbocharger acts like a very high speed fan, which forces more air into the engine. The amount of pressure a turbo can generate is measured in pounds per square inch above atmospheric pressure. So a turbocharged engine with 15 pounds of boost would be moving roughly twice the air of a naturally aspirated engine, and all things being equal, would make roughly twice the power.Novatec d772sb
With newer diesels, boost pressures can be as high as 40 psi, yet the engine will remain reliable, and make three to four times the power of a naturally aspirated diesel. How A Turbo Works A turbocharger in its most basic form consists of only a few parts: a frame, shaft, compressor, turbine, and compressor and exhaust housings. Exhaust gases from the engine are used to spin the turbine, which in turn drives the compressor through a shared shaft, which generates boost pressure to be sent to the engine.
These types of turbos have been used successfully since the s in racing and diesel engines. Boost And Drive Pressures While we've already introduced boost pressure, another important aspect of turbocharging is drive pressure. Drive pressure is the amount of force in pounds per square inch that is being used to spin the turbocharger. A drive-to-boost pressure ratio of is ideal, although in reality, drive pressure is usually a bit higher than boost pressure.
If a situation occurs where drive pressure far exceeds boost pressure say, 35 psi boost, 65 psi drive pressure then you might be looking at trouble. To imitate a high drive pressure situation, try breathing in a normal breath, then cover your mouth with your hand and exhale. That is what you're doing to your engine. High drive pressures are hard on parts and make your turbocharger much less efficient.Nz herald world ending
Too much boost can also be a problem for turbochargers. To produce more boost, turbos will spin faster, and every turbocharger has a spot where it just can't spin any faster. If you run 45 psi of boost or more on an HX35 for any extended period of time, your turbocharger is almost sure to fail.
The idea was, since these trucks would mostly be used for hauling, great response was not needed. As trucks started becoming popular daily drivers, the need for better-responding turbochargers became a necessity. There is an amount of time that passes from when you floor your diesel engine to the point where it starts to build a fair amount of boost say psi.
This time period is called turbo lag. To reduce turbo lag, Dodge and other manufacturers started using much smaller exhaust housings and wastegating their turbochargers by diverting exhaust gases around the turbine wheel. The smaller exhaust housing would help the turbo spool up quicker, while the wastegate would allow excess drive pressure to be bled off once the turbo was up to speed. When diesel trucks are modified to produce more fuel or higher rpms, the amount of exhaust gases can exceed the capacity of the internal wastegate.
If this is the case, a larger exhaust housing can be fitted, or an external wastegate, mounted in the exhaust manifold, can be added to the turbo system.
It should be noted that not all turbochargers are wastegated. In competition applications such as sled pulling, the engine may only be operated in a very narrow operating range say, 3, rpm. If drivability is not a concern, these racing engines can get away with non-wastegated housings and still have a favorable boost-to-drive pressure ratio. How Does A Turbocharger Fail?Volvo OE No. Current No. The Robert Bosch company is one of the oldest automotive parts manufacturers in the world.How To Easily Test a Turbo / Boost Control Valve TCV
Bosch created the original generator for Mercedes Benz and worked for Mercedes prior to be allowed to enter into a contract with Mercedes to provide generators. For almost years the Bosch name and reputation for quality has been unsurpassed in the automotive aftermarket. Currently the largest automotive parts company in the world, Bosch is an OEM for most European and many domestic and Asian vehicle manufacturers. They specialize in engine management, starters, alternators, spark plugs, oxygen sensors, and fuel delivery and injection.
If this is not the exact Turbocharger Boost Pressure Sensor you are looking for, or you would like this part in a brand other than Bosch, please contact us and one of our customer service experts will help you locate the exact part you need. If a part fails, the original purchaser can purchase a replacement product, process an RMA for the defective item, and return the item for a credit of the original purchase price of that item.
We will not provide a replacement or credit for any part not purchased directly from our store. This warranty is not transferable. Only the original purchaser of the part can receive a credit after they have purchased a replacement. You must purchase a replacement part at the current price for that specific item prior to receiving any credit.
114405 - Bosch - (BPS) Boost Pressure Sensor S70 V70 C70 XC70 S40 V40 S60 S80 - 9125462
You will be credited for your original invoice amount, less any discounts received. This warranty does not cover any shipping costs. If the original part is no longer available from eEuroparts. If the original item or suitable replacement part is not available, then this warranty is void.
We also provide inexpensive and guaranteed 3 day, 2 day, and Overnight shipping options, so if you need your Turbocharger Boost Pressure Sensor tomorrow, eEuroparts. Every eEuroparts. The item must be new and in its original manufacturer packaging to be eligible for a cash refund.
If you would like to return an item or have questions about the process, please contact us and one of our customer service experts will be happy to help. This information is only a summary.When the turbocharger was introduced in the early 's for diesel engine applications, one of the most difficult side-effects was broken internal engine components caused by excess pressure built up by these forced induction systems.
The solution to reduce this problem was to create a pressure release tube, commonly referred to in today's turbocharged engines as a wastegate hose. Today's modern cars, trucks and SUV's that utilize turbochargers are commonly powered by diesel fuel. The turbo system supplies the engine with additional air or "boost" inside the fuel injection manifold, and is forced into the combustion chamber to create a more efficient burn.
When the turbo builds up too much pressure, it is released by way of the wastegate hose. Essentially, this is a gate inside the turbo that opens or closes depending on performance needs. When it opens, it allows air through the turbo. When it closes, it shuts off the boost or restricts the flow of forced air into the combustion chamber. However, a bad or failing wastegate hose can cause a number of different problems for your engine. Here are some common symptoms and warning signs that may hint towards having a worn out wastegate hose :.
Typically each automotive manufacturer will establish an operating pressure zone, ranging from the minimum pressure allowed to a maximum amount of "boost" to be created inside the turbocharger. Since these systems are extremely complex and set with incredibly tight tolerances, when the boost approaches the top zone or eclipses it by less than one pound of air pressure, it will commonly trigger a warning code and thus illuminate your Check Engine Light.
If you have a turbocharged vehicle and this light comes on the dashboard, you should safely drive your car back home and contact a certified mechanic as soon as possible. Sometimes this issue can be caused by a vacuum leak, but with a turbocharged car it's very difficult to diagnose without the proper experience, tools, and procedures that a certified diesel mechanic will possess.
If you've driven a turbocharged engine before, you'll easily understand the difference between an engine that is engaging the turbo and one that is not working properly. When you apply throttle pressure to the engine and the turbo does not engage, or the turbo boost gauge does not register a boost level, it's commonly due to the wastegate not functioning correctly or a blockage in the wastegate hose.
If you notice this problem, it's recommended to contact an experienced diesel mechanic with experience in turbocharged systems immediately to repair the problem before additional damage to the turbocharger occurs. When the wastegate is not relieving pressure on a consistent basis, it will commonly cause the boost pressure inside the turbo to oscillate rapidly. For example, if during normal acceleration your turbo boost climbs consistently as your car accelerates and reduces slowly once you stop pressing down on the accelerator, this is what is supposed to occur.
If your turbo boost drops quickly or rises quickly without the application of the throttle, it could be caused by a blockage in the wastegate or a broken wastegate hose. If this is the issue, it's likely that you'll have to replace the wastegate hose.
One of the best advantages of buying a turbocharged diesel engine is that, for the most part, they produce exceptional fuel economy. However, when the wastegate hose is broken, leaking or blocked, it will cause more raw fuel to be expelled from the exhaust system without being burned. This will result in a rapid loss in fuel and significantly reduced fuel economy.
If you notice that you're filling up the fuel tank more frequently than normal, contact a certified diesel mechanic in your area to replace the wastegate hose or inspect your vehicle for other damaged components within your turbocharger. Turbocharged engines are fine-tuned machines that need to be maintained more frequently than traditionally fuel injected vehicles. If you notice any of the above warning signs, contact a mechanic as soon as possible to avoid additional damage to your turbo or engine.
The most popular service booked by readers of this article is Vehicle Engine Mechanical Inspection. Our certified mobile mechanics make house calls in over 2, U. Fast, free online quotes for your car repair. Schedule Vehicle Engine Mechanical Inspection. Service Area.
Average rating fromcustomers who received a Vehicle Engine Mechanical Inspection. Here are some common symptoms and warning signs that may hint towards having a worn out wastegate hose : 1. Vehicle's turbo does not produce boost during acceleration If you've driven a turbocharged engine before, you'll easily understand the difference between an engine that is engaging the turbo and one that is not working properly.
Oscillating turbo boost pressure When the wastegate is not relieving pressure on a consistent basis, it will commonly cause the boost pressure inside the turbo to oscillate rapidly.I am pulling this from the article I wrote on Tbricks about 3.
I believe I wrote a similar article on VS, but it was lost in the last crash. So here's the TB version with some things revised and added in. Since it seems multiple times every day, we have people asking the same questions again and again "What mod should I do first?
This will focus on turbos primarily, as that is where the majority of my experience is. There will be notes and information about other cars though as well It is my hope that this post in conjunction with the pinned FAQ thread will be able to guide people to the answers to some of the more repetitive questions relatively easily. Overview: The engines in these cars turbos, T5's, T5-R's, and R's, as well as all series T5's [may mention early V70R's], all of which will be referred to as the HPT turbo cars as they are mechanically very similar are 2.
The European manual transmission R received a 16T turbo. Not sure on stock boost setting, I'd assume it's around 10 for the T5's and probably Stock airbox design is excellent, pulling cold air from behind the grille, and can be easily modified to be even better.
With these cars, there are basically two relatively easily attained levels of tuning. The other level is one in which the turbo is upgraded, and performance is limited mainly by the transmission and later, the connecting rods.
The HPT cars with their stock 15G turbo reach their limitations fairly quickly. A reprogrammed ECU, coupled with good 2. The ECU will increase fuel and boost maps to about psi maximum boost. You should be running mid-low 14s with anywhere from horsepower at the crank. Extracting more power with the stock turbo is becoming difficult, because at higher RPMs, the turbine side limits exhaust flow.
If you choose to upgrade the turbo upgraded compressor wheel for the 15G, or using 16T, 18T, or 19T turbos are easiestthen you will potentially be able to yield significant gains in power beyond psi.
The 15G isn't too efficient even at 16 psi, so even at the same boost levels, you will feel a gain because the air won't be so superheated. This is the seperating factor for this level, because fuel mods apart from the pre-made performance chips are a consideration. Larger injectors and a rising-rate fuel pressure regulator are options, as well as the possibility of a custom ECU program. Best case scenario would be a custom ECU program used in conjuction with larger injectors. That would be the route I would recommend.
Civinco has also proven to be a viable option, depending on the user. There are 3 turbine housing designs with two variations having been seen internally in the angle-outlet housing, but we will ignore that for now! User jonsayre has contributed a photograph of all three side-by-side.10 hp generator wiring diagram diagram base website wiring
As you can see, the difference is in outlet size. This is the same flange Volvo uses, but they use a raised lip on the exhaust manifold and recess in the turbine housing to make a mechanical gasket-less seal. This lip on the manifold must be machined down by a mill in order to use one of these turbos. There are 16G, Big 16G, and 20G compressors available in this series of turbo, and there are a handful of members using these turbos with great success.I have the low-pressure Volvo S I was wondering if there are any differences between the low-pressure and hi-pressure turbos?
Can I use the boost regulator on my current low pressure turbo? Where can I buy one, and is it a matter of pushing some buttons on the regulator? Yeah the high pressure turbo forces more air and fuel into the combustion chamber creating more power and more acceleration. The low boost S60 runs about 6 PSI of boost pressure where as the high pressure version runs around 11 PSI this extra pressure creates alot more power from memory the low boost is around Kw And the High Kw so there is alot of difference but that includes other engine mods aswell.
If you want more speed go out and buy a boost regulator and you can change boost yourself but dont go to high ie above 15 PSI or you will stuff your turbo. Further more fitting a regulator to this model would be more difficult than your average japanese car a mechanic could fit one they would probably need to adjust the air fuel ratio and maybee a bigger intercooler if you want serious boost.
Turbochargers - How It Works
The difference is the boost. The high pressure turbo gives more boost but comes in at a higher RPM range and therefore has the dreaded turbo lag. The low pressur comes on just above idle and has little turbo lag, but does not provide the power of the high pressure.
Most modern turbo's are variable with both characteristics built into one turbo. The HPT uses way beefier forged i think internals, where the LPT uses the same cast internals as the naturally aspirated 2.
The high pressure models have a larger intercooler and the wastegate allows more boost. There are other tweaks to the fuelling and management. On my SVO I have a switch, so I can chose under 10 lbs for regular gas or full 16 lbs for premium gas, for maximum horse power,and the best of both worlds. You can also get adjustible boost controls so you can set it anywhere you want it. Update: Can I use the boost regulator on my current low pressure turbo? Answer Save. The low boost S60 runs about 6 PSI of boost pressure where as the high pressure version runs around 11 PSI this extra pressure creates alot more power from memory the low boost is around Kw And the High Kw so there is alot of difference but that includes other engine mods aswell If you want more speed go out and buy a boost regulator and you can change boost yourself but dont go to high ie above 15 PSI or you will stuff your turbo.
Also note the fitment of a boost regulator cancels any manufacturers warranty the car has. Pamela Lv 4.
This Site Might Help You. RE: Is there a big difference between hi-pressure and low-pressure turbos? How do you think about the answers?Welcome Guest Log In Register. Similar Topics. Hello, we have answers for your Volvo-related questions!. Why not take a few moments to ask a question, help provide a solution or just engage in a conversation with another member in any one of our forums.
Together we can make our Volvo community a better place. Powered By IP. Board 2. View Member Profile. Dec 27PM. Post 1.
Would somebody be kind enough to let me know what the difference between the low Pressure Turbo and the High Pressure Turbo.
I believe my S80 2. I don't really know what that means. Any information would be appreciated thank you. Cheers :. Post 2. I am still reading and learning about stuffs so, I hope someone corrects me if I am wrong. The difference between the two is, obviously the pressure generated by the spinning turbos.
While higher pressure will provide more boost, it doesn't necessarily mean more power as in HPs. If you look at the cars for instance, a stock LPT would carry a factory-fitted boost at about 0. Turbo boost developed by the high pressure turbo provides quick low engine rpm response while the low pressure turbo for the high engine rpm.Why measure?
K-jet mechanical fuel injection depends on continuous regulation and variation of fuel pressure delivered to the injectors. Line or system pressure readings will help define a problem with the fuel delivery system such as the pumps and filter.
Residual system pressure checks may help identify a check valve, accumulator, or injector fault. Control pressure readings qualify the mixture adjustment that must be made through the cold start and warm-up process.
This is handy for various no-helper tasks, not just k-jet service. Home made from a salvaged harness connector and a cigar lighter cable. I took care to be sure my CPR was not one with an internal ground on the heater element before connecting this, otherwise polarity of the plug would have been critical.
The banjo fittings in this image are from my junk box. Working outdoors, you might find this an unnecessary step, but I preferred to release the system residual pressure and that fuel in the accumulator, in a controlled fashion.
The funnel is made from vinyl hose and an unused doesn't fit 's transmission fluid funnel. The pressure tester has two connections with a valve to block one of them. It is inserted in series with the fuel flow from fuel distributor to the CPR aka warm up regulator. The valved port is connected to the CPR inlet, so shutting off the flow will permit the gauge to read full system pressure.
Symptoms of a Bad or Failing Wastegate Hose
Opening the valve to allow flow exposes the gauge to control pressure. This shows the CPR inlet. The CPR is located low on the block, under intake manifold ports 1 and 2, just behind the ignition distributor.Why do i keep losing connection to ea servers fifa 20
This is the place I tap in, on the naturally aspirated 79 k-jet. So much easier to reach on the 83 turbo, if tapped-in right at the fuel distributor. This photo underneath the manifold of the 79 clearly identifies the origin of the line that supplies the CPR inlet, though if I had verified this, it was by feel, not sight. The fittings supplied adapt to the banjo and banjo bolt with copper washer gaskets.
Then, on the 79, I attached the remaining gauge hose to the CPR inlet port. I am fairly lucky with these copper gaskets used in the fuel lines, dressing them with firstthen grit, moistened with a squirt of WD or kerosene. The gauge hose connects to the flare fitting adapter. The bend is rather tight here, but workable.
Using the pressure tester on the 83 turbo is much easier. The CPR line is the one joining the top-most fitting on the fuel distributor. The pumps are run bypassing the fuel pump relay, on this 79, by connecting fuse 5 to battery, which appears on fuse 7. With the gauge valve open, control pressure is measured. The gauge shows 22 pounds or 1.
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