Author Topic: WHY TDI?  (Read 12231 times)

April 19, 2009, 11:08:11 am

Duster 5.9

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WHY TDI?
« on: April 19, 2009, 11:08:11 am »
maybe it's just me and i'm confused, but why is there so much tdi stuff in this section of forum. I don't have any turbo cars. i don't want to read about them, (maybe someday when i get one, but i can go to that section) it's such a waste of readers time when you open a page and start reading to find out it pertains to a tdi car. ARGH!


81 rabbit gas resting
81 rabbit cabby diesel n/a
85 jetta diesel n/a
85 golf diesel runs great
82 caddy diesel clean
82 caddy gas solid resting
and some parts cars

Reply #1April 19, 2009, 11:31:38 am

8v-of-fury

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WHY TDI?
« Reply #1 on: April 19, 2009, 11:31:38 am »
Just because it is a Turbo engine, does not mean it is a TDI.

If i take my n/a and throw a turbo on it.. its not a TDI its still an IDI.

The name refers to the fuel delivery system, not whether or not it has a turbo.

Courtesy of Vince Waldon, stolen from a vwvortex thread.

Quote from: "Vince"
In a nutshell:

"TD" = generic name for IDI (Indirect Diesel Injection) engine with a turbo

- fuel is injected by a mechanically-controlled pump into a pre-combustion chamber in the head... hence the word "indirect".
- first-gen diesel engine design... 1978ish to the mid 1990s, depending on what country you live in.
- throttle is a standard lever and cable
- cold start is a manual knob
- glow plugs needed for even fairly warm starts, due to the large surface area of the pre-combustion chamber

"TDI" = Turbo Direct Injection

- fuel is injected by an electronically-controlled pump directly into the combustion chamber (a dished hole in the piston))...hence the word "direct"
- second-gen diesel design... mid-1990s to 2003
- throttle is drive-by-wire... no throttle cable
- cold start is controlled by the ECU
- glow plugs only needed for pretty cold starts
- fuel efficiency better than IDI

Three other flavors you'll read about:

"mTDI": a (generally home-made) TDI pump that has been converted over to manual control to remove all dependancies on electronics

"PD": Pumpe Duse design where each injector has a self-contained high pressure pump of its own driven off a camshaft. 2003ish-2006, again depending on where you live.

"common-rail": generic term used when describing current 3rd generation design (2007+) where the injectors are connected to a common rail fuel distribution that operates at extremely high pressures.


Wikipedia has pretty good articles on this stuff as well.


That should answer your question. :)

Reply #2April 19, 2009, 12:01:14 pm

Rabbit on Roids

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WHY TDI?
« Reply #2 on: April 19, 2009, 12:01:14 pm »
TDi =
Turbo Direct Injection

IDI =
InDirect Injection

either one of these engines can be turbo or non turbo. if your engine has a turbo, the only significant thing that means, is that its got a turbo. TDI and IDI engines have very few parts that are interchangeable. prothe was going to TRY to make a tdi out of a 1.6, but we have yet to see that happen yet. myself personally, i dont think it will ever happen with cheap crappy chinese junk parts. maybe one of our fine machinists from the board could make something like that happen, but its not going to be made into an easy to build kit. it would just be cost prohibitive. honestly, if i wanted a TDI motor, it wouldnt be a 1.6.

Reply #3April 19, 2009, 12:11:32 pm

Baixo

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WHY TDI?
« Reply #3 on: April 19, 2009, 12:11:32 pm »
IDI= In-direct Injection from factory can be turbo or non turbo

TDI= Turbo Direct Injection Comes only turbo

in europe you can get the

SDI witch is Direct Injection with out turbo.
91 B3 Wagon VRT  300-400hp I will find out soon
97 B5  Sedan TDI  110hp
91 A2   Golf   GTD   70hp
82 Datsun Pick up 2.2D  65hp ?

Reply #4April 19, 2009, 12:16:41 pm

Rabbit on Roids

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WHY TDI?
« Reply #4 on: April 19, 2009, 12:16:41 pm »
isnt that basically the exact same thing i just said?
and ive seen direct inject motors without turbos before...

Reply #5April 19, 2009, 12:27:25 pm

Baixo

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WHY TDI?
« Reply #5 on: April 19, 2009, 12:27:25 pm »
Quote from: "Rabbit on Roids"
isnt that basically the exact same thing i just said?
and ive seen direct inject motors without turbos before...





it is I was just simply making it clear, the difference from TDI and SDI

oviously you didnt read my post

TDI= Turbo Direct Injection

SDI= Direct Injection without Turbo.

in North America the VW Direct Injection always came Turbo from the factory.......

if that erks you, dont pay attention to my post.
91 B3 Wagon VRT  300-400hp I will find out soon
97 B5  Sedan TDI  110hp
91 A2   Golf   GTD   70hp
82 Datsun Pick up 2.2D  65hp ?

Reply #6April 19, 2009, 12:32:59 pm

burn_your_money

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WHY TDI?
« Reply #6 on: April 19, 2009, 12:32:59 pm »
My goodness this is an angry thread.

Lets all sit back, take a deep breathe and crack open a beer 8)
Tyler

Reply #7April 19, 2009, 12:35:51 pm

Baixo

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WHY TDI?
« Reply #7 on: April 19, 2009, 12:35:51 pm »
Quote from: "burn_your_money"
My goodness this is an angry thread.

Lets all sit back, take a deep breathe and crack open a beer 8)




usually threads that start angry will stay that way.

just a observation.
91 B3 Wagon VRT  300-400hp I will find out soon
97 B5  Sedan TDI  110hp
91 A2   Golf   GTD   70hp
82 Datsun Pick up 2.2D  65hp ?

Reply #8April 19, 2009, 12:58:44 pm

Rabbit on Roids

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WHY TDI?
« Reply #8 on: April 19, 2009, 12:58:44 pm »
who said anything about anger? honestly, couldnt care less..  but i think the beer thing is a good idea. its sunday, the sun is out, its a good day to drink beer! :lol:

or a good day to take the rabbit on a looper..
that sounds like even more fun, go burn some diesel and kill a few beers.

Reply #9April 19, 2009, 01:40:59 pm

truckoSaurus08

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WHY TDI?
« Reply #9 on: April 19, 2009, 01:40:59 pm »
TDI= Turbo direct injection
IDI= Indirect injection





Just Kidding! :lol:

Reply #10April 19, 2009, 01:50:05 pm

snakemaster

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WHY TDI?
« Reply #10 on: April 19, 2009, 01:50:05 pm »
TBI= Turbo beer injection  :lol:  :wink:
IDI= Indirect injection

thats why pop like TDI  :lol:  8)
Glenmorangie  single highland malt

Reply #11April 19, 2009, 02:29:02 pm

Duster 5.9

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WHY TDI?
« Reply #11 on: April 19, 2009, 02:29:02 pm »
Wow did i open a can of worms :lol:  I did not plan to piss in anyones diesel :lol:  I guess i just learned something really fast, and i also guess if i would ever read the tdi stuff i could have answered my own question. anyway thanks for clearing this up for me and i hope other people learn from this too. SO for all you idi turbo guys/girls i opoligize :D
81 rabbit gas resting
81 rabbit cabby diesel n/a
85 jetta diesel n/a
85 golf diesel runs great
82 caddy diesel clean
82 caddy gas solid resting
and some parts cars

Reply #12April 19, 2009, 04:49:33 pm

8v-of-fury

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WHY TDI?
« Reply #12 on: April 19, 2009, 04:49:33 pm »
this reminded me greatly of being on the Vortex  :roll:

It got pretty heated.. probably the worst ive seen on this forum in my days here.. Good job on keepin it PG guys :P

Duster, if you hadda asked a question like that on the vortex you woulda needed one hell of a flame suit... lmao

Reply #13April 19, 2009, 09:20:56 pm

flapjack

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WHY TDI?
« Reply #13 on: April 19, 2009, 09:20:56 pm »
i'm pretty drunk. its awesome. i got drunk with no turbo on my car. its still awesome.
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Reply #14April 19, 2009, 09:35:55 pm

maxfax

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WHY TDI?
« Reply #14 on: April 19, 2009, 09:35:55 pm »
Quote from: "flapjack"
i'm pretty drunk. its awesome. i got drunk with no turbo on my car. its still awesome.



CHEERS!!!   Gotta love DBI  (Direct Beer Injection)..  I was coming back from the neighbors on my Golf cart, beer in hand!!   Some A-hole cop flagged me down and tried to give me  s**t..   I was in MY field not his road,  at last when he saw me that is... :roll:


Oh yeah, My neighbor has a NATDI (Not A Turbo Direct Injection)... :lol: