ATDC    (Degrees) After Top Dead Center
BTRC    (Degrees) Before Top Dead Center

1988 Syncro Transporter with a 2.0L I4 - 12 BTDC!

David Marshall

Fast Forward Autobahn Sport Tuning
4356 Quesnel Hixon Road
Quesnel BC Canada  V2J 6Z3
mailto:info@fastforward.ca      http://www.fastforward.ca
Phone: (250) 992 7775           FAX: (250) 992 1160

. Vanagon Accessories and Engine Conversions
. Transporter, Unimog and Iltis Sales
. European Lighting for most Audi and Volkswagen models

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf
Of Bill Kasper
Sent: April 10, 2001 3:02 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: VW EMISSIONS CONSPIRACY

on 4/10/01 2:54 PM, Smola, Tony at TSmola@TRIBUNE.COM wrote:

> I sign-off with 8 degrees BTDC and that is where I like it ( 44 degrees
full
> advance) and acording to Bentley they state 5 degrees ATDC plus or minus 1
> degree.    I reccommend 5 BTDC, but I like the added lower end punch I
> achieve by going to 8 degrees BTDC......although I think I might back it
off
> 2 degrees to bring the idle down.....The throttle body screw is turned all
> the way in and it's idling at 1000 rpms.....
> So bottom line is 5 degrees ATDC performs poorly, advance yours to TDC and
> see how you like it. And if you want to see how the van performs at her
> best, advance 5 more degrees to 5 or 6 degrees BTDC.
> You won't think of a 2.1 L or an expensive conversion.
>
> Of course if you can convert, I would go to the 1.8T ( 150 bhp) with a
> chip......180 bhp.  and they will become more and more available as more
> bugs and jettas crash......
>
> T
>
> -----Original Message-----
> From: Zoltan [mailto:zol@foxinternet.net]
> Sent: Tuesday, April 10, 2001 9:44 AM
> To: Smola, Tony
> Subject: Re: VW EMISSIONS CONSPIRACY
>
>
> Hi Tony,
> That makes me think.  You say 5 degrees plus minus one Atdc is where it
> performs well.   When you sign off your lines state 8 degrees  Btdc.  Is
> there not a mistake of mixing up the A with the B?
> Zoltan
> ----- Original Message -----
> From: "Smola, Tony" <TSmola@TRIBUNE.COM>
> To: <vanagon@GERRY.VANAGON.COM>
> Sent: Monday, April 09, 2001 6:59 PM
> Subject: VW EMISSIONS CONSPIRACY
>
>
>> I have noticed 2 things that bother me about the 1.9 liter wasserboxer.
>>
>> 1) the understatement by VW of displacement of the motor.....it's
actually
>> somewhere around 1955 cc
>> 2) the detuning of the motor......5 degrees ATDC vs what the motor really
>> performs at which is any where around 5 degrees +  - 1 degree
>>
>> Did VW do these things so that the Vanagon would pass the stringent
German
>> smog standards of the 80's?......the black forest dying?
>>
>> I don"t know but it seems kind of wierd.......Any comments from the
engine
>> gurus?......
>>
>> Malibu Tony
>>
>> 85'  Westy.....
>> 8 degrees   BTDC
>> and 44 degrees (corrected!) full advance..
>> ....Digitool Darrell confirms this is safe.... and I agree.......

ok, i am ignorant.  just what the hell is atdc and btdc?

thanks.
bill
'87 syncro westfalia
http://www.scruznet.com/~cikasper/pics/westy