A forced induction device that increases an engine's power output and efficiency. It's consists of a turbine, driven by the engine's exhaust, coupled to an impeller which compresses and forces air into the engine. More air (= more oxygen molecules) + more fuel = More power

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45 views

What exactly is porting a wastegate and what situations would I want to do it in?

I've seen it mentioned that some people should port their wastegate on their turbocharged vehicles. Usually, this seems to be recommended in some situations where the car is overboosting past the ...
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3answers
7k views

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 ...
8
votes
2answers
45 views

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 ...
13
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2answers
6k views

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 ...
11
votes
1answer
70 views

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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1answer
86 views

what is the exhaust pressure of bajaj pulsar 220cc engine 2014 model?

What is the exhaust pressure of Bajaj Pulsar 220cc engine 2014 model? What is the normal idling rpm of Bajaj Pulsar 220cc? Can a turbocharger be installed on this bike?
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2answers
9k views

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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2answers
19k views

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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3answers
9k views

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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6answers
1k views

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 ...
4
votes
2answers
2k views

Second burst ancillary hose on Z20LET engine

This morning was the second time the same ancillary coolant hose burst in my car. It's a 2005 model Opel/Vauxhall Astra turbo coupe (engine is Z20LET). Prior to this, I have had many problems with ...
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votes
1answer
64 views

Turbo shaft broken [closed]

Ford Fiesta 1.4 diesel TDCI There was a rattling noise. Checked and found that noise is due to damaged turbo turbine. So turbo replaced. But after replacement with new turbo and 10KMS road test, the ...
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0answers
40 views

R56 mini cooper turbo sounds

I have a 2010 mini with a r56. the loss of power light comes on when I step on it. I know the PCV valve is bad on it and can set this light. I also have a rear main seal leak so the turbo has to come ...
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votes
2answers
2k views

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 intercooler before it is passed to the engine. But what is the reason ...
14
votes
2answers
96 views

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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1answer
74 views

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 ...
10
votes
1answer
82 views

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 ...
2
votes
3answers
126 views

Naturally Aspirated to Turbocharged

I have a NA 1.3 petrol engine and wanna load a turbo. I am looking at second hand parts at online stores and wondering if it is a problem to use a turbo from diesel engine. Does this make any ...
6
votes
2answers
331 views

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 ...
7
votes
1answer
293 views

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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3answers
89 views

VWAG TSI engines and intercooler

I have a TSI engine but auto is not VW. I wonder if these engines come along with intercooler or is it just oil cooling. Is there a way of identifiying as I can open the bonnet and notice? edit: it ...
5
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1answer
136 views

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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2answers
4k views

What does PRNDSB means?

My Daihatsu Mira does not have any manual, Its an automatic car with TurboEngine and Gear with PRNDSB. What does all these means? My car is four wheel drive as I can see rear differential in it. If ...
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2answers
119 views

ALS (anti lag system) - What are the various types of ALS systems used on forced induction vehicles?

I have a very basic understanding of one anti lag system on some models of Toyota Celica. I am interested if anyone knows the various types of Anti-lag Systems that exist in the real world and/or ...
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votes
2answers
3k views

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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0answers
85 views

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 ...
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votes
2answers
92 views

DPF (Diesel Particulate Filter) and Turbo: Golf TDI Bluemotion(hybrid)

I have a problem with my 2012 Golf TDI Bluemotion. The DPF and turbo need to be replaced. The replacement costs about R65 000 SA Rands. Is this common with this TDI blue motion engines or it's my ...
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votes
2answers
2k views

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 ...
2
votes
1answer
400 views

Engine, sudden reduced power with soft shaking

I have a 2007 Holden with a 2.0 Turbo engine. On one day I decided to go through a light that had just turned orange- so I pressed down, not completely as I new how much power I needed to go through ...
3
votes
2answers
3k views

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 ...
6
votes
4answers
816 views

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 ...
2
votes
1answer
119 views

Turbo gain level

I have a question - do you have any idea about potential power level of 132 kW (180 HP), 700 Nm MAN truck (TGL) 4.5 litre engine with damaged (not working) turbo? Would it accelerate to 55 km/h with ...
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votes
2answers
979 views

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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votes
1answer
196 views

Turbo Charging Suzuki Splash/Ritz

Can I turbo charge my Suzuki Splash/Ritz? Its a 1.2 liter petrol engine with 85HP. What types of engines can be turbo-charged. If it's possible, how would I do it?
17
votes
4answers
41k views

Why does a Turbocharger only produce boost when the engine is under load

As per the Title. 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 ...
7
votes
2answers
449 views

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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vote
1answer
730 views

Mk5 golf lacking boost and smoke before turbo

About a month ago the turbo blew on my mk5 Golf replaced it and cleaned all the pipes. Since this the car is lacking boost below turbo and the black smoke is so bad I can't see the car behind me. I ...
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vote
0answers
448 views

Subaru Forester XT has a hissing sound under acceleration and lacks power [closed]

I want to buy an 06-08 Forester XT and on Friday I went to test drive an Automatic. Now, I know the auto box isn't the best and the forester weighs a good 300kg/600lbs more than my Astra Coupe, but it ...
2
votes
2answers
705 views

Can I use an intercooler as a charge cooler radiator

I'm looking at creating an advanced charger cooler setup for my car, can I use an intercooler as a charge cooler radiator? Or do radiators need some special coating on the inside of them? It's a ...
1
vote
2answers
266 views

Can turbochargers cause engine damage gathering dirt and other particles from the air

I have been researching turbochargers and since they use outside air and exhaust to improve engine function couldn't that harm the engine? Or do I not understand the principle? Can't particules from ...
3
votes
2answers
108 views

How do I determine whether this vehicle has a turbocharger?

This is a 1999 Suburban, which did not have any aftermarket turbocharger installed. So, the only way it could have been installed is from the factory. So, how do I find out whether it has one? What ...
0
votes
2answers
2k views

VW 1.4 TSI EA113 Variations

What does VW do to improve HP and Torque from their 1.4 TSI engine? e.g.: CAXA: 90 KW @ 5000 200 NM @ 1500-4000 CAVD 118 KW @ 5800 240 NM @ 1500-4500
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1answer
455 views

BMW 33D 2001 no power problem

I have: BMW 330D, 2001 year, saloon, 135kw Recently I have change the turbo charger of my car. There was a problem related with this post. Then I went to the garage and they ran the diagnostics. ...
5
votes
1answer
1k views

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 ...
2
votes
1answer
906 views

Diesel motor running slightly jerky on normal RPM after having the turbo repaired

I got my turbo repaired, the service told me that stopped working due to a sensor that had to be changed. It costed me a lot because they told me that the sensor was inside the turbo and it was hard ...
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votes
2answers
1k views

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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vote
4answers
325 views

How to prevent a car from boosting?

Considering a turbo car. The specific model is a Dodge Caliber SRT 2008, but I'd prefer a more generic answer. How can one prevent the car from boosting while still having a car that can be driven ...
4
votes
3answers
1k views

Is it feasible to Turbo a NA engine while maintaining 87 AKI octane fuel use?

I initially thought there should be a way to bolt on a small aftermarket turbo onto my naturally-aspirated Honda D17A2 (9.9:1 compression ratio) engine in my EM2 Civic EX without having to switch from ...
4
votes
3answers
3k views

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?
0
votes
3answers
1k views

Typical Stock Boost Values

For an engine that is boosted out of the factory, what are typical maximum and average boost values? Are they conservative in the 5-6 PSI range or do they get more aggressive getting up to 10-15 PSI? ...