boost general, and abbreviations

[itsabimmerthing]

I think this would be a cool, useful thing if it isnt already on this site.
I think it would be cool, to post the common turbo slang, and some general FAQs. If we all pitch in, this could help many people. Lets see how it goes.
FMIC- front mount intercooler
SMIC- side mount intercooler
BOV- blow off valve
BPV- by pass valve
WG- waste gate
IWG- internal waste gate
EWG- external waste gate
IC- intercooler
SMIM- sheet metal intake manifold
MAP- Manifold Absolute Pressure (sensor)
BLACKBOX- device which hides boost pressure from ECU
ECU- Engine control unit
Boost creep- unintentional boost increase, usually through overrunning of a wastegate.
Duty cycle- the amount of work, in percentage, your fuel system is taking.
Boost leak- this is when you have a leak that is associated with turbo hardware. Car usually runs like shit, and boost doesnt go as high as you would wish.
Piggyback- A computer system which works in conjunction with your factory ecu, lets you datalog, and tune many parimeters in some situations
Stand Alone- Plugs in to existing harnesses (direct fit) which takes over your ECUs job. You program it to do what you want. Datalogging, nitrous, boost, timming, and other very important parimeters are tuned through this.
DOWNPIPE- Runs from turbocharger wastegate/hotside blades VIA Vband or flanged to your exhaust
DIVORCED DOWNPIPE- A downpipe in which you directly vent the WG to the atmosphere. Very effective, very loud, very illegal.
Common turbo abbreviations you may see when doing a homemade setup using FACTORY TURBOS FROM FACTORY CARS
CT26- MK3 Toyota Supra turbocharger
E3-16g- Evolution 3 16g. Light weight blades, largest 16g, very efficent.
F20g- FUSO 20g from the Mitsu Diesel
14b- Very powerful turbo for its size, from the 1g DSM cars.
13g- Automatic tranny 1g DSM turbo
E16g- Reverse scroll Evolution NG turbocharger
T3- Can be found on many cars, including the popular Turbocoupe Tbird turbo pre 87
Hx35- Came on certain Cummins I beleive. Popular, very hard hitting, very efficent, very strong turbo. Popular, cheap, easy to find.
HX40- Same as above, but larger lol
FAQ regarding boost levels.
How much can my stock engine take? -This is a just about impossible question to answer. It depends on how large your turbocharger is. Larger turbos create more power, and is more stressful to your motor at same boost levels with a smaller turbo.
How important is a good tune- The most important. Simple as that. With a good tune, you can push your car harder, while being smoother, and making more power. It is imparitive you have it done professionally on a dyno.
Can I install my own stand alone- Yes. You can if it is direct fit. It is LITERLY plug and play. But tuning is another story.
What are advantages to an external wastegate- An external wastegate stops boost creep, which can quickly destroy a motor. Also, boost recovery is quicker.
Can I run a large exhaust on an internal gate- it depends on the size of the turbo. In many cases creep occurs. Many people port out the internal wastegate, and notice no trouble. Many find out the costs of cutting corners.
Are bigger turbos efficent at lower boost- yes and no. Engine size helps dicatate many factors. A turbo can be unefficent at 10lbs versus 14lbs. Turbo surge charts are important
What does it mean to run lean- More air than fuel. Quite simply, it can create a very high EGT QUICKLY, and leave you pissed off on the side of the road
Is it good to run rich- You dont want to run too rich. You could foul plugs, and if bad enough, create carbon in the motor, loosing power anyway. This is where that tune comes in to play
Why datalog- Logging injector duty cycles, as well as knock count could save you headaches. If you see excessive knock, you know you have a problem, and should do something about it quickly. If you see duty cycles high, you need to determine what is safe.
Log manifolds versus equal length header- log manifolds are cheaper, and in some cases more durable than a turbo header. with a good header, it will be durable. many cheaper ones simply cannot get hot and cool down billions of times with the weight of a huge snail pulling on it. log manifolds are less effective at scavaging exhaust, and spoolup.
What is turbo lag- this is when you are not fully spooling the turbo. larger engines spool faster, smaller turbos spool faster. Turbo boost is always a downshift away. In many cases, lag is minimal because of this
Can I run low octane gas- I wouldnt. simple as that
Lowering compression- Lowering compression makes turboing easier, and tuning easier. Some cars benefit from raising, IE 7:8 on a turbo 4g63. Examples of lowering would to lower the high S50 comp ratio to help prevent detonation. Many people use thicker head gaskets. I would reccomend just getting the pistons and doing it right.
This is pretty basic. Hope it helps. Add what you know, and lets get this thing huge!

[E30stain]

cant say theres anything i can add to this besides other turbo names but this is great!

[itsabimmerthing]

Thanks man. I think this could help people big time. I know how it can suck to have to wait for a response before taking action on a project. Hopefully this can help people without having to feel dumb, or wait for a response.

[BMW Maniac]

Charge pipe - piping that leads to the inlet of the turbocharger (contains filter, MAF, and piping in my setup)

[itsabimmerthing]

A few more I forget as well!
Pressurized plenum- A pressured carb hat type device that is used when turbocharging carbed cars
EGT- Exhaust gas temp
Pyrometer- EGT gauge