Mi16 On Unleaded

[sport1901966 8]

Whilst using the haynes to time up my mi at the weekend i saw it mentions having to change the timing by 3 degrees if the engine is to be run on unleaded. I just wondered if anybody had more info on this?

 

Thanks,

Geoff

[DrSarty 90 1 Cars]

You ought to clarify Geoff the details of your car/engine.

 

A typical Mi engine cannot be timed, so I am assuming you have one of those 8v distributor adaptors?

 

Mi ECUs are usually mod'd to unleaded by way of a resistor (an OE one not one of those eBay thingies).

Edited October 30, 2009 by DrSarty

[taylorspug 7]

You cant change the ignition timing on standard Mi16 engine management, hence why they are reccomended to run on super unleaded. If you have a later 3 row ECU the engine will have a knock sensor and will retard the timing somewhat on its own, although only once the pre-ignition starts!

 

Id just run it on Optimax anyway, i always found mine gave better fuel mileage on this than normal unleaded, and it ran sweeter.

[sport1901966 8]

Its running the motronic 1.3 ecu. I didn't think it was possible to time manually which is where my question comes from. Basically is it something i need to do anything about. I assume it needs advancing due to pre ignition issues with unleaded, does that mean it should be run on higher octane unleaded?

 

Thanka for looking

[sport1901966 8]

You cant change the ignition timing on standard Mi16 engine management, hence why they are reccomended to run on super unleaded. If you have a later 3 row ECU the engine will have a knock sensor and will retard the timing somewhat on its own, although only once the pre-ignition starts!

 

Id just run it on Optimax anyway, i always found mine gave better fuel mileage on this than normal unleaded, and it ran sweeter.

 

Thanks that clarifys things!

 

Cheers for the help guys.

[taylorspug 7]

IIRC 1.3 is 3-row anyway so thats a good start. As i said before the reccomended fuel type for Mi16s is Super Unleaded, so yes it would be better to run it on that.

[sport1901966 8]

IIRC 1.3 is 3-row anyway so thats a good start. As i said before the reccomended fuel type for Mi16s is Super Unleaded, so yes it would be better to run it on that.

 

Sorry the 1.3 was a complete lie i meant 4.1 so a 2 row . But certainly super unleaded it is!