Author Topic: Acronyms Defined  (Read 15661 times)

January 31, 2006, 01:42:11 pm

fspGTD

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Acronyms Defined
« on: January 31, 2006, 01:42:11 pm »
Updated May 16, 2007

Note: fspGTD is inactive on this board, please post acronym suggestions in this thread rather than sending them directly to him.


Technical acronyms frequently used on the GTD Board:

-basics-
GTD = Gran Turismo Diesel.  A sporty Diesel car offering from Volkswagen.
IDI = Indirect Injection.  This combustion chamber design is used in the prechamber or "swirl chamber" diesel engines used by VW before TDIs.  Other automotive diesel manufacturers such as mercedes also have Indirect Injection diesels.
DI = Direct Injection.  This combustion chamber design is used on most commercial diesel trucks (and starting in the 90's, on some autmotive applications.)
TD = Turbo-Diesel

-car or engine parts-
VNT = Variable Nozzle Turbocharger, also known as variable-vane turbo.
IC = Intercooler
ECU = Engine Control Unit, electronic
IP = Injection Pump
LDA = "LadeDruckabhangiger (vollast)Anschlag" (german translation), the boost pressure enrichment device found on mechanically controlled turbo-diesel injection pumps
EGR = Exhaust Gas Recirculation

-characteristics and features-
CR = Compression Ratio, or Common Rail.
NA = Naturally Aspirated, or North American
VE = Volumetric Efficiency.  A percentage measure of how efficient an engine is at ingesting air.  Not to be confused with the "Bosch VE" type fuel injection pump used on our motors.
EGT = Exhaust Gas Temperature
TDC = Top Dead Center
BDC = Bottom Dead Center
WHP = Wheel horsepower.  Typically lower than crankshaft horsepower because of friction/etc. losses in the drivetrain between the engine and wheels.
MAF = Mass Airflow.  A sensor measuring this is usually found in electronically controlled diesels.
MAP = (intake) Manifold Absolute Pressure.  A sensor measuring this is usually found in electronically controlled diesels.

-fuels-
B100 = Biodiesel, 100%. Biodiesel is a fairly strong solvent and can cause original fuel injection pumps to leak fuel, in older VW diesels (IDIs).
B20 = Biodiesel, 20% mixed with 80% petroleum diesel
LSD = Low Sulfur Diesel
SVO = Straight Vegetable Oil.  Usually recycled cooking oil or grease.
WVO = Waste Vegetable Oil.
ULSD = Ultra Low Sulfur Diesel. Mandated in North America around 2006-2007. Result is cleaner emissions and less visible exhaust smoke. Many older diesel fuel injection pumps start leaking, possibly from ULSD's lower lubrication.

-engine names-
PD = "Pumpe Düse" (german translation), means unit injector.
TDI = VW's brand name for their Turbocharged Direct Injection diesel motor.
SDI = "Suck" Direct Injection, loosely translated.  A naturally aspirated form of VW's direct injection diesel motor.
TDI-M = TDI with Mechanically controlled fuel injection
1.5D, 1.5NA or 1.5lNA = 1.5 liter Naturally Aspirated IDI VW Diesel engine
1.6D, 1.6NA or 1.6lNA = 1.6 liter Naturally Aspirated IDI VW Diesel engine
1.6TD or 1.6lTD = 1.6 liter Turbo-Diesel IDI VW engine
1.9D, 1.9NA or 1.9lNA = 1.9 liter Naturally Aspirated IDI VW Diesel engine
1.9TD or 1.9lTD = 1.9 liter Turbo-Diesel IDI VW engine.  Sometimes referred to by its engine code: "AAZ"
D24 = Diesel 2.4 liter 6 cylinder IDI Diesel Volvo motor, manufactured by VW.
D24T = Diesel 2.4 liter Turbocharged 6 cylinder IDI Volvo motor, manufactured by VW.
300D = 3.0L 5 cylinder Mercedes Benz motor, either Naturally Aspirated or turbocharged.

-general forum acronyms-
AFAIK = As Far As I Know
ICE = Internal Combustion Engine, or In-Car Entertainment
IIRC = If I Recall Correctly
PM = Private Message
PU = Pick Up (Truck)
WOT = Wide Open Throttle (pedal to the floor)

Reply here or instant message me if you have more to add... thanks.


Jake Russell
'81 VW Rabbit GTD Autocrosser 1.6lTD, SCCA FSP Class
Dieselicious Turbocharger Upgrade/Rebuild Kits

Reply #1February 19, 2007, 11:14:21 am

dieselsnowmobile

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Acronyms Defined
« Reply #1 on: February 19, 2007, 11:14:21 am »
PU = PickUp, also know as a Caddy.  VW early 80's pickup truck that is similar to a Rabbit (Golf in Europe) body.
LS = The fancy car come with Lots of Stuff, that the L version does not have.
'89 1.6L NA Diesel Jetta (469,100 mi) w/ Rabbit Engine (242,500 mi)

Reply #2February 19, 2007, 04:05:06 pm

malone

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Acronyms Defined
« Reply #2 on: February 19, 2007, 04:05:06 pm »
fspGTD is currently not active on this board. I updated his acronym list above. If anyone has acronym suggestions, then please PM me or post here instead of PMing fspGTD.
http://www.tunezilla.com
93 Eurovan AHU TDI
96 Golf 1.9L ASV TDI - I bought it back!
97 Golf Variant Syncro 1.9L 1Z TDI - sold and missed
11 Golf 2.0L CJAA TDI DSG - Stage 4
14 Golf Wagon 2.0L CJAA TDI DSG - Sold
17 BMW 328d wagon - Sold
09 BMW 335d 3.0L

Reply #3February 20, 2007, 09:38:17 am

FineFrank

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Acronyms...
« Reply #3 on: February 20, 2007, 09:38:17 am »
You forgot WFO- Wide Flippin' Open
 :lol:
Frank Longtine
1983 Rabbit Diesel 4 dr/ 1.6NA
1997 Rokon Trailbreaker
1984 Ford F-150/ 300-6

"The welfare of humanity is always the alibi of tyrants"   -Albert Camus-

Reply #4July 13, 2007, 05:20:01 pm

sjampoo

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Acronyms Defined
« Reply #4 on: July 13, 2007, 05:20:01 pm »
Quote from: "dieselsnowmobile"
PU = PickUp, also know as a Caddy.  VW early 80's pickup truck that is similar to a Rabbit (Golf in Europe) body.
LS = The fancy car come with Lots of Stuff, that the L version does not have.


Nah:

N - > Niedrig ( low, humbe)
C - > Comfort (well, you got a sigaret lighter in the 70's)
CL -> Comfort Luxe (not only you would die smoking, but you would see through the rear window since it got a wiper)
GL -> Gran Luxe (smoke, whipe and adjust your mirrors for the inside out)

S is added to either L , CL or GL to for LS CLS or GLS -> where S is for ' Sporty' : the first bigger/faster engine then the stock one.

GT -> Gran Turismo : some fancy sporty stuff, (like rev-counter, faster engine), some luxurious stuff like inside-out-mirrors, opening-roof-window, but without the chrome and possibly without the sigaret lighter you get in the GL

GTI -> As GT but with Injection engine instead of carbed

D -> Diesel
TD -> any version but with turbocharger: simular to the early-year : 'S' version :)
GTD -> Like GTI but with a Turbodiesel (with most likely an Intercooler setup)
Volkswagen Polo 86c 1982 1.4D with G40-supercharger (running veggy power)
http://www.volksforum.com/forum/showthread.php?t=22161

Reply #5July 16, 2007, 06:05:55 pm

malone

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Acronyms Defined
« Reply #5 on: July 16, 2007, 06:05:55 pm »
Thanks sjampoo, I will amend the acronyms list soon. GTDs have a few more features that are slightly unique to regular TDs.. I just need to pull together more info.
http://www.tunezilla.com
93 Eurovan AHU TDI
96 Golf 1.9L ASV TDI - I bought it back!
97 Golf Variant Syncro 1.9L 1Z TDI - sold and missed
11 Golf 2.0L CJAA TDI DSG - Stage 4
14 Golf Wagon 2.0L CJAA TDI DSG - Sold
17 BMW 328d wagon - Sold
09 BMW 335d 3.0L

Reply #6October 08, 2007, 08:29:20 pm

arrowsmithdiesel

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Acronyms Defined
« Reply #6 on: October 08, 2007, 08:29:20 pm »
What is the significance of... Jetta TD    **ECO**?
 Anyone?
Arrowsmith Diesel Performance PDTDI Stage 1
AFE Cold air intake
Diesel Power Digi PD
Evolution Evo Skidplate

[email protected]

Reply #7October 08, 2007, 10:40:27 pm

malone

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Acronyms Defined
« Reply #7 on: October 08, 2007, 10:40:27 pm »
Quote from: "arrowsmithdiesel"
What is the significance of... Jetta TD    **ECO**?
 Anyone?


ECO is a TD with a NA pump.. it doesn't add fuel as boost increases. The turbo is only there to push more air into the engine, thus ensuring a cleaner burn (minimizes smoke). Eco = "green" to an extent. Eco diesels only have a few HP more than a NA diesel, approx. 4hp if I remember correctly.

Simply swap a TD pump into an eco TD and then you'll end up with a true TD. However eco TDs may have slightly smaller turbos than a factory 1.6TD. The eco turbos are medium sized between big 1.6 turbos and most 1.9 small turbos.. the eco diesel turbos (K14 etc.) may be a nice compromise between top-end performance and boost response.
http://www.tunezilla.com
93 Eurovan AHU TDI
96 Golf 1.9L ASV TDI - I bought it back!
97 Golf Variant Syncro 1.9L 1Z TDI - sold and missed
11 Golf 2.0L CJAA TDI DSG - Stage 4
14 Golf Wagon 2.0L CJAA TDI DSG - Sold
17 BMW 328d wagon - Sold
09 BMW 335d 3.0L