Mi 16 Ignition Timing

[mmt 15]

Hi Guys,

 

I´ll try to describe my problem....

 

 

Went to the mecanics yesterday to get my 205 mi16 just fittet engine rolling road tuned. The engine is running on twin 45 webers and distributor adaptor= 205 1.9 wiring.

 

The guy started to adjust the egnition wich was ok. Ignition were set to about 30 degrees at idle. Then he changed some jets in the carbs....Everything according to textbook!

 

BUT

 

When the engine were rewed the ignition timing went cracy. Instead (as I understand from the mecanics)of advancing the ignition timing upon higher rews the ignition fell down to about 6 degrees.

 

Cheched everything: Vacum tube to distributoris ok, the engine does not get air from leaks...

 

The mecanics then suggested that the Ignition module(little Bosch thingy near the coil) does not fit the engine..

 

Can this be right? That some kind of build in feature does cause the timing not to advance?

 

I have the ignition module from the 405 mi 16 car... should I use that instead of the 205 module?

 

ANY thoughts or pointers very appreciated.

 

Thanks

/Martin

[paulvancraen 0]

The Mi16 ignition module is exactly the same a s the 205 GTi. It's both MTR01 so it won't make any difference...

 

What management are you running?

[mmt 15]

Thanks for your reply.

 

What do you mean? No engine management sice I´m running on carbs.

 

Are there other management?

[woodsy 0]

Could it be the diapragm in dizzy that not advancing the timing.Mine is running similiar setup but with cams and i dont use the dizzy advance

so have blanked the pipe off.This is what Skip Browns do on their conversions also.Iam using 16v flywheel that doesnt have timing marks on so took

them while setting my timing up but no probs now.When i fitted my adapter on new cam maine could do with moving round bit more as my dizzy is all way

over against the slots.

[mmt 15]

Hi woodsy Thanks for your reply.

 

What do you mean by the "dizzy diapragm" Whart is that? And what is "running with cams" Hope my poor english i ok.

 

Is it the vacum pipe on the dizzy wich is blanked?

Does that mean that it is running on the same timing regardless of rews?

 

Sorry for all my questions.

 

Im running the 8v 1.9 gti flywheel. The mecanichs in the shop found cylinder 1 piston top and marked up the flywheel. And started timing from there.

 

Thanks

[Jakob 1]

Hi Guys,

 

I´ll try to describe my problem....

 

 

Went to the mecanics yesterday to get my 205 mi16 just fittet engine rolling road tuned. The engine is running on twin 45 webers and distributor adaptor= 205 1.9 wiring.

 

The guy started to adjust the egnition wich was ok. Ignition were set to about 30 degrees at idle. Then he changed some jets in the carbs....Everything according to textbook!

 

BUT

 

When the engine were rewed the ignition timing went cracy. Instead (as I understand from the mecanics)of advancing the ignition timing upon higher rews the ignition fell down to about 6 degrees.

 

Cheched everything: Vacum tube to distributoris ok, the engine does not get air from leaks...

 

The mecanics then suggested that the Ignition module(little Bosch thingy near the coil) does not fit the engine..

 

Can this be right? That some kind of build in feature does cause the timing not to advance?

 

I have the ignition module from the 405 mi 16 car... should I use that instead of the 205 module?

 

ANY thoughts or pointers very appreciated.

 

Thanks

/Martin

 

30 degree at idle is crazy and wrong.

 

Your max should be somewhat in the twenties @ WOT/8000rpm and idle around 10-13 degree

 

Your are clearly informed wrong about the figures, otherwise your mecanics is not a mecanics....

 

I have made a ignition configurator for startup maps.

All ignition maps are to be mapped on dyno or road, however it givs you a clue where to start when programing an engine management and starting the engine.

 

You will find it here http://www.powerpage.dk/tuning_ignition_configurator.aspx

Open it where it says "Åben konfigurator her" and choose english as language.

Put in your data for a 4valve, 86mm bore engine, on 95 octan gas.

 

Edited August 21, 2009 by Jakob

[Jakob 1]

I now see you are danish, so should have no problem finding it

[Jakob 1]

Danish forum for ignition issues: http://www.powerforum.dk/viewforum.php?f=7

[mmt 15]

Jacob I´ve sent you a message.

Edited August 21, 2009 by mmt

[woodsy 0]

The timing advance unit is bolted onto the dizzy looks like a round disc with vacum pipe coming off it.