Ignition timing vacuum question v6 cologne

[IamWedgend]

Hi Guys,

Just picked my 280i up from getting the timings adjusted - guy who did it said the vacuum was throwing the timing off at revs and so he blocked the vacuum pipe off with a bearing.

Seems to drive fine, but not sure how normal this is as a fix.

Anyone else had anything similar?

Best,
J

[phillpot]

Was he wearing spurs, does he ride a horse?

[IamWedgend]

Yea that's what I thought. Taking it back into a different garage next week...

[spitfire4v8]

unless he was testing it under load on a dyno the timing sounds like it's doing exactly what it should do .. advance the timing over and above the mechanical advance system under part load.

A second opinion would be a good idea but try and choose someone who knows one end of an engine from the other ..

[IamWedgend]

Yea - shame as they are a well reviewed place.
If anyone knows anyone around Bristol they'd recommend, let me know

[MADNESS]

With all the years of knowledge and experience with this engine, I would have thought it was very easy to set the timing correctly.

[Belle427]

IamWedgend said:

Yea - shame as they are a well reviewed place.
If anyone knows anyone around Bristol they'd recommend, let me know

Amore Autos may be able to help, think they have a workshop.

[LLantrisant]

vacuum advance usually is just for emissions and mainly on overrun.

so theoretically you could run the engine without.

before searching a workshop better buy this:

https://www.ebay.co.uk/itm/184196427049?hash=item2...

[IamWedgend]

Interesting insight - yes the main change i've noticed is that it does pop a bit on the overrun now. Thanks for the tip!