hello

Does somebody knows how much degrees I must set timing on rst (stock engine, no mods, boost is 0.55 bar) ?

 

12deg with idle revs and map hose disconnected.

 

Thanks m8

map hose is hose which goes from inlet plenum (vacuum) to ecu?

 

Yes

 

And remember, idle is around 700rpm, not 1000 rpm or so.

 

idle's quoted at 800 to 900 rpm.

 

Just checked, and 850rpm is what Ford states. Anyhow, at 1000+ a timing error is made very easily. This and the map hose not removed are the two most common timing faults both resulting in too little advance and poor performance. You will be amazed how many of the RSTs I have tuned actually have way too little advance even though the owner says that he has just set it to 12.

 

Also,


i think ford quote slighty less rpm on a S1 than a S2, think its 50 rpm less..

 

Thank you all

but what role have knock sensor? isnt he here to advance timing before knocking? or he will do wrong job if I didnt set ignition timing?

 

I doubt it will never advance the timing beyond the map value. It's just to retard it in the case of knock.

 

OK. I will do like JesseT said. thanks

 

As jess said,


the knock sensor on a RST will only retard if it picks up det, and will never advance till det.

 

ok. I will go tommorow set ignition on 850 rpm with map hose dissconected. because I never checked ignition timing. and I am sure that mechanics in my country doesnt know that map hose must be dissconected (and hole on plenum blocked?) and doing all on 850 rpm.

 

why do you disconnect the map hose

 

Because otherwise the ecu will advance the timing and the 12deg is specified with the hose removed. Simple as that. Failing to remove the hose when setting the advance to 12deg means you're some 6 degrees of and ~15% short in hp.

 

just wnider cause mine was just done and its 0 degres so is it 12 deg on the crank and 0 on the cam

 

Different ECU's have different advance curves too. A more accurate way is to apply pressure to the ECU map sensor, and set to 14 degrees at 4000rpm. I do neither, and tune it by ear on the road.

 

just one thing, After setting rpm idle at 850, and dissconecting map hose , must I block map hose with somethnig? I mean block hole on inlet plenum and hole on hose which goes to ECu? and off course , set 12 degrees...

Thanks , hope non ford mechanic will know do that with my help

 

Yes best block it, so theres no vacum leak, use a small bolt.

 

Now I have complete giude for i.t.

Thanks mate