Questions tagged [turbocharger]
An exhaust-driven forced-induction device that increases an engine's power output and efficiency.
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Static vs. Effective compression: Why does higher effective compression not require higher octane gas?
Background
I've been trying to do a lot of research on boost lately because I'm planning on running a moderate turbo setup on my daily/light-duty-autox car in the future. I'm trying to get into the ...
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Why do we need to cool air after it leaves a turbocharger?
When we are using a turbocharger to compress the incoming air, the air gets hotter. Usually this hot air is cooled by using an intercooler before it's passed to the engine.
What is the reason behind ...
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Why does a Turbocharger only produce boost when the engine is under load?
Why does a turbocharged car only produce significant boost whilst the engine is under load? Is is something to do with how much exhaust is being produced or is there some kind of valve mechanism that ...
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What happens to a car when it hasn't been driven for 12 years?
I'm hoping that I'll soon be the owner of 2l turbo charged, 4wd hatchback that's been sat in a garage, undriven for over a decade. Trouble is that I won't be able to give it a full inspection until I ...
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What is an A/R ratio?
I heard the term A/R ratio today while watching a video about turbochargers.
What does the term A/R ratio mean?
Does it just apply to turbos? If not, what else does it apply to?
How is it computed?
...
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Turbo equivalent on electric motors
Is there anything functionally equivalent to a turbo for electric motors?
Obviously, I am not asking for something that reuses exhaust gases to force in more air, because there are no exhaust gases ...
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How to deal with a hot turbocharger
A piece of advice that seems to be widely accepted is that after a long high-speed run, when the turbocharger is thoroughly hot, you should let the engine idle for a while before stopping it. The ...
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What are the various causes of preignition / detonation?
A search on detonation produced some of the causes of detonation, but everything I found says there are other causes, but none list them.
The most common listed cause is the air / fuel mixture ...
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What is overboost?
I've heard the term overboost quite a lot.
What is "bad" overboost?
What is an overboost problem?
What will happen to my turbo engine if I don't fix it?
Edit: apparently there is a good type ...
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Why is it that when supercharging, it's preferred to compress the input, rather than pull a vacuum on the exhaust?
It's a strange dilemma, but if the power of an engine is determined by the difference in pressure between the combustion chamber and the exhaust, it should follow that turbocharging should be equally ...
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Minor boost leak and shrill tone at peak boost: hose clamp, gasket or blow off valve?
Vehicle in question: 2004 Subaru WRX wagon.
This weekend, I replaced the intercooler hose (y-shaped upset the intercooler), the throttle body hose and the blowoff valve hose (routes the over boost ...
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My subaru legacy will not boost
I drive a Subaru Legacy Turbocharged GT 2008 model with an EJ20 engine.
When I press hard on the acceleration to boost the tachometer upon reaching 4-5 thousand RPM's it starts jerking and there is ...
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What is the function of a blow-off valve vs a wastegate?
I am waiting for a 2013 STI and have been looking into upping the performance, but before I go down that road I would like to thoroughly understand the components in a forced induction vehicle.
I've ...
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Do you really need to cool down your turbo after hard driving? [duplicate]
Vehicle: 2012 Subaru Sti
I have been driving turbocharged cars for a while now and I have blatantly accepted that before shutting down you must let your car idle for a few minutes after driving hard ...
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what sensors and formula are used to control VGT/VNT turbos?
I want to fit a variable geometry turbo to my car. Its vanes are usually controlled an electrical actuator (otherwise sometimes it's on vacuum). What information is used to to inform the state of the ...
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Troubleshooting Low Turbo Boost
I'm starting to suspect that the smoke and low power (I'm pretty sure it is not "limp mode" just a lack of enthusiasm) I'm seeing in our 2002 Jetta TDI (ALH engine with Garret VNT-15 turbocharger) may ...
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Turbo losing boost at around 4000 rpm
I have a 2005 Opel Astra Turbo Coupe. I would imagine most of you guys are more familiar with the Vauxhall or Holden badge, but it's the same car with the same Z20LET Turbo Ecotec engine.
Anyways, ...
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Is there a 1:1 relationship between boost pressure and power increase?
This question got me thinking: if you were to install a turbocharger on an engine, is there a straightforward relationship between the boost pressure and the amount of power you can expect?
For ...
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How does a supercharger differ from a turbocharger?
What is the difference between superchargers and turbochargers?
I looked it up before but I really don't understand what the difference is.
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How can I diagnose intermittent low boost on a turbocharged diesel?
When driving around 120/140 kmph and applying max gas, normally the force/torque can be really felt from the turbo. However sometimes its just not there / no extra pull, also the consumption meter ...
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Is it possible to extend the length of the shaft on an existing turbocharger, further distancing the compressor from the turbine?
I'm toying with turbojet engine ideas, and over the course of my research it occurred to me that the combustion chamber could be more power-efficient and space-efficient if it was aligned in the ...
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Why no exhaust gas turbine generator in hybrid vehicles?
I found something interesting on Wikipedia today: a hybrid turbocharger. This is a device that charges a battery with an exhaust gas turbine, and at the same time operates an air compressor using the ...
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Would a non-turbo diesel perform better in high altitudes than a comparable gasoline engine?
I live close to the Rocky Mountains and drive into them quite often. I have a small naturally-aspirated four-banger that tends to lose a very noticeable amount of power getting into the higher ...
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Petrol vehicles, what are the advantages and disadvantages of a turbo charger?
Diesel vehicle often use turbo chargers. Petrol vehicles frequently do not. What are the advantages and disadvantages of using a turbo charger on a petrol engine?
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2002 Ford F350 Superduty 7.3L Turbo diesel using a quart of oil every 43 miles
This Diesel engine has been rebuilt and it didn't use any oil till the HPOP went out. I replaced the oil pump and then I noticed my turbo when going up a hill and the Turbo would sound like a sneeze ...
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Does limiting the use of a vehicle's turbocharger improve fuel economy?
I have heard that when a turbocharger is being used it will cause the fuel economy of your car to drop.
Without thinking about techniques to improve fuel economy in general, how does a driver ...
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SAAB 9-5 wagon throws P1549 Code (Boost control valve)
I called an ASE-certified mechanic. He charged some $60 for the visit and $60 diagnosis and really he didn't quite spot on anything. Left me where I was - work-wise , diagnosis-wise and knowledge-...
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Oil draining out shortly after turbo hose detached/broke
My car is a VW Golf 5 1.9 TDI (77 kw), year 2005.
Problem: Turbo hose broke
Yesterday while driving on the highway with a speed of around 130-140 km/h I noticed a sound from the engine which was ...
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Is it feasible to Turbo a NA engine while maintaining 87 AKI octane fuel use?
I have a Honda Civic with a naturally-aspirated Honda D17A2 (9.9:1 compression ratio).
Goal:
I want a modest horsepower gain (say +38 hp) in the lower-mid-range powerband; I'm not after the maximum ...
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Shop replaced engine, blew about six weeks later
A local repair shop recently replaced the engine in my 06 Pontiac Solstice. They obtained a used engine from LKQ. I'm not sure how many miles the replacement engine had (unfortunately).
Wednesday ...
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Troubleshooting low boost pressure
A Tata with a Quadrajet BS IV (90 ps) diesel engine was brought in for low power. When starting the engine in a no load condition the turbo boost pressure is 950 mBar. When the engine accelerates the ...
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Ford Fiesta 1.4 TDCi Oil Leak
I have a Ford Fiesta 1.4 TDCi 2006 model and I recently did a head gasket change. Now there is a oil leak from the engine, behind the turbo, i cant seem to find the source, but it looks bad. Can ...
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How to test if turbo is properly working in a 2006 Forester XT
I recently had my Forester engine serviced and afterwards it didn't feel like I was getting boost and was getting a whirring/spinning noise while throttling. I brought it back and they realized they ...
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Turbo Failure Modes (VW TDI VNT15)
The turbo output in our 2002 VW Jetta TDI has dropped way off. Pulling the turbo out seems like a serious piece of work, so I'd like to be pretty confident that it has failed before I pull it. So I'm ...
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BMW 330D 2001 E46 Turbo Charger not working as expected after changing
I have a problem with my car.
My car:
BMW 330D, 135kw, 2001 year, E46.
A week ago my turbo charger got broken when I was driving. There was a lot of white smoke going out of exhaust and there was no ...
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1997 Subaru WRX STI Type R - Strange and occasional turbo lag
After a longer drive (45 minutes on highway) my turbo is spooling but not putting power to the tires. The revs just kinda bounce there like it's hitting a limiter but it's only around 5k rpm. This ...
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Car suggests shifting gears too early [closed]
I own a 2014 Volkswagen Passat 2.0 TDI Bluemotion. It is a 6 speed manual transmission. I understand that it is a car tuned for economy. But it still asks me to shift too early.
For example if I'm at ...
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2006 Audi A4 2.0T, No passing power
I have a 2006 Audi A4 2.0T Turbo Tiptronic Automatic that has no passing power.
When I step on the accelerator the car will shift down into a lower gear, rev about 3500 RPMs but will not shift up ...
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Solstice - Can an exhaust leak cause (really bad) hesitation?
My Solstice says "hi everyone." Moving on.
I've had some really rough starting over the past month or so. I hadn't had time to really look at it until a few days ago, when I noticed the downstream O2 ...
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Can I attach a DC blower to intake manifold of my 150CC Yamaha FZS FI engine?
I am planning to add a 12V DC blower (https://www.amazon.in/gp/product/B00LPUXVWS) to intake manifold of my Yamaha FZS FI 149CC engine. I thought it could work more like a supercharger, except it will ...
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Why do Subarus run so rich under boost
This isn't a general question regarding air/fuel ratios. I want to know why Subaru specifically insists on making their cars run ridiculously rich under boost. For instance, my 2007 Forester XT has an ...
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Audi A4 2007 2.0T boosts but poor performance, fuel economy
My 80,000 mile 2.0TFSI Turbo Audi has lost a lot of performance but produces no check-engine-light (CEL) or codes. One month ago an independent garage looked at it and did $2200 of work including ...
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How to increase the lifespan of a diesel turbo?
Replacing a diesel engine's turbo costs a lot of money.
How should a diesel car's owner drive, park and take care to insure that he/she gets the maximum km/miles out of his/her car's turbo?
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Is the procedure for an oil change different for a turbocharged engine?
I recently upgraded my ride to a 2011 Taurus SHO. I usually try to change the oil as soon as possible after a vehicle purchase, just to be safe. I'm not used to turbo cars, as this is my first, so I ...
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High Octane petrol's effect on turbos
I have a 2001 SAAB 9-3. I was told that I should use a high octane fuel...that it would extend the life of the turbo. Is this true?
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Forced induction and engine braking
So does forced induction negate the effect of engine braking on compression motors?
For example, going down an incline, drop into 3rd (automatic) to get some engine braking going. With my new Chevy ...
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How to know what turbo fits my engine?
I am trying to start modifying a stock Skoda Octavia MK1 Engine type APK, but not sure what turbo to fit. I am planing to start the project and been advised to start with the turbo before the airflow ...
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What is better for sparkplugs, inconel super alloy or iridium?
I am buying new sparkplugs for my 2006 Volkswagen Passat 2.0T and i purchased pulstar be1h10 sparkplugs with a plasma core, but i am now being told that they are not good for my car because they arent ...
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Will a small engine oil overfill damage the engine or turbo?
I own Suzuki Swift diesel, the engine is 1248cc Fiat sourced diesel engine with a small FGT turbocharger. I overfilled the engine with about 1/2 litre too much engine oil and drove at high speeds on ...
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Ford transit though was going to blow
Yesterday I was coming on the highway with a Ford Transit and suddenly I noticed that the power was not normal and thought I had a flat tyre. As I turn to the petrol station lost all the power and a ...
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