Timing for dummies

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Timing for dummies

Postby Rezizter » Wed Aug 19, 2009 2:56 pm

on the 8v motor i know that when i turn the dizzy the idle gets better or worse

Question is, could anyone explain in detail, how to do this properly, perhaps how to use a timing light properly, and how do you know if you are TDC, or 6 degrees tdc, or well any degree Tdc.
Should timing be done at certain intervals, if so how?

Something thats always puzzled me.

Any input would be appreciated

Regards

Shaun
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Re: Timing for dummies

Postby porno_ster » Wed Aug 19, 2009 3:01 pm

Rezizter wrote:on the 8v motor i know that when i turn the dizzy the idle gets better or worse

Question is, could anyone explain in detail, how to do this properly, perhaps how to use a timing light properly, and how do you know if you are TDC, or 6 degrees tdc, or well any degree Tdc.
Should timing be done at certain intervals, if so how?

Something thats always puzzled me.

Any input would be appreciated

Regards

Shaun


http://en.wikipedia.org/wiki/Ignition_timing
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Re: Timing for dummies

Postby neighbourhood terror » Wed Aug 19, 2009 3:08 pm

In short you should be messing with it. The timing on your car (I assume you're refering to the Velocity) is controlled by the EFI, thats why you don't have any advance mechanism on the distributer. There is a base timing setting which which is set at a specific engine RPM but once thats set you leave the distributer alone. Moving the distributer can mess up the fuel consumption and cause engine damaging detonation and rob you of performance
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Re: Timing for dummies

Postby Torker » Wed Aug 19, 2009 3:13 pm

neighbourhood terror wrote:In short you shouldn't be messing with it.


Fixed up :cool:
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Re: Timing for dummies

Postby neighbourhood terror » Wed Aug 19, 2009 3:25 pm

Torker wrote:
neighbourhood terror wrote:In short you shouldn't be messing with it.


Fixed up :cool:

Ah yes ... thanks :wink:
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Re: Timing for dummies

Postby dhirennaidoo » Thu Aug 20, 2009 12:54 pm

neighbourhood, where do you get those renders from your sig?
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Re: Timing for dummies

Postby neighbourhood terror » Thu Aug 20, 2009 1:17 pm

dhirennaidoo wrote:neighbourhood, where do you get those renders from your sig?

From here > http://database.mangacars.fr/categories.php?cat_id=256
Found one of a Mk1 then edited it to match my car
:wink:
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Re: Timing for dummies

Postby Rezizter » Thu Aug 20, 2009 3:15 pm

Thanks porno ster, exactly what i was looking for.

Shot for the help guys, good thing you told me about the efi... or else i would have had one broken little velo.

Fortunately i have a few mates with carb cars, so i'll practice my new found skills on their cars :evil: (i can see alot of people having to walk from next week :oops:

Regards

Shaun
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Re: Timing for dummies

Postby MacMan » Thu Aug 20, 2009 3:57 pm

Rezizter wrote:on the 8v motor i know that when i turn the dizzy the idle gets better or worse

Question is, could anyone explain in detail, how to do this properly, perhaps how to use a timing light properly, and how do you know if you are TDC, or 6 degrees tdc, or well any degree Tdc.
Should timing be done at certain intervals, if so how?

Something thats always puzzled me.

Any input would be appreciated

Regards

Shaun


The reason the idling changes when you turn the distributor is because you are advancing and retarding the ignition timing.

To set the timing on an 8V VW motor, you need to line up the 3 timing marks and then adjust the ignition timing using a timing light.

Lining up the 3 timing marks:

The mark on the cam pulley is a line on the inside of the pulley (facing the battery) and at TDC this mark must be level with the bottom of the tappet cover.

Image


The rotor must point to the mark on the side of the distributor (you will need to take the plastic cover under the rotor off to see it).

Image


There are 2 "flat pieces" on the flywheel and the mark you are looking for will be in between these 2 "flat pieces". This mark is either a punch mark (small round hole) and / or a v-type line cut into the flywheel and this mark must be in the middle of the inspection hole on the gearbox.

Image


If you chose to use the punch mark (small round hole) then the motor is now at TDC. If you chose to use the V-type mark cut into the flywheel, then the motor is now at 6 degrees BTDC.

Adjusting the ignition timing:

Carb:

* Disconnect the vacuum pipe going to the vacuum advance unit on the distributor.
* Loosen the 13mm bolt that holds the clamp on the distributor shaft to prevent it from turning.
* If you used the punch mark (small round hole) then you will need an adjustable timing light and set it to 6 degrees advance. Then shoot the timing light at the mark on the flywheel and turn the distributor until the mark appears in the middle of the inspection hole.
* If you used the V-type mark cut into the flywheel, then you can use a static timing light, or an adjustable timing light set to 0 degrees. Then shoot the timing light at the mark on the flywheel and turn the distributor until the mark appears in the middle of the inspection hole.
* Tighten the 13mm bolt that holds the clamp on the distributor shaft to prevent it from turning.


MP9:

* You will need to get a VAG-COM, connect the diagnostic cable to the diagnostic port in your car and go to Group 1 under basic settings in the Engine menu. This will increase the revs to +- 1500rpm.
* Loosen the 13mm bolt that holds the clamp on the distributor shaft to prevent it from turning.
* If you used the punch mark (small round hole) then you will need an adjustable timing light and set it to 6 degrees advance. Then shoot the timing light at the mark on the flywheel and turn the distributor until the mark appears in the middle of the inspection hole.
* If you used the V-type mark cut into the flywheel, then you can use a static timing light, or an adjustable timing light set to 0 degrees. Then shoot the timing light at the mark on the flywheel and turn the distributor until the mark appears in the middle of the inspection hole.
* Tighten the 13mm bolt that holds the clamp on the distributor shaft to prevent it from turning.
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Re: Timing for dummies

Postby Rezizter » Fri Aug 21, 2009 9:40 am

gosh macman, thanks very much, thats exactly what i wanted to know.

Thanks again, brilliant write up.

Regards

Shaun
Current: 2011 BMW E82 135i Alpina White - Stock

ex: 2008 Seat Cupra 1.9tdi Zenith Grey - stock
http://www.vwclub.co.za/phpbb3/viewtopi ... 1&t=150579
ex:2005 Velociti 1.6i - Dark Metallic Blue (sold)
ex: 2005 Velociti1.4i - White (stolen)
ex: 95' WHITE CITI (i'll always miss you)(blew up)

I'd rather push my VW than drive an Opel

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Re: Timing for dummies

Postby dhirennaidoo » Fri Aug 21, 2009 10:50 am

neighbourhood terror wrote:
dhirennaidoo wrote:neighbourhood, where do you get those renders from your sig?

From here > http://database.mangacars.fr/categories.php?cat_id=256
Found one of a Mk1 then edited it to match my car
:wink:


Shot! :grin:

EDIT : They even had a pic of my classic!! Too wicked :grin:
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'09 Honda CBX250 Twister
Ex : '91 Fox 1.8, Honda CBR600F, '05 Polo Classic TDi (PD100)

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Re: Timing for dummies

Postby Dj lost » Fri Aug 21, 2009 3:46 pm

U only line up all 3markings for cambelt changes or when u change cam to get belt on and have all 3 perfect again
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