Adjusting ignition advance on SPi or MPi Flywheels
Turbo Mini Forums

Here are a few pics of how to adjust the ignition advance on Spi and MPi flywheels. Obviously the amount adjusted is right across the ignition map. This is how the expensive Superchips icon works, but electronicaly, well at least on the older ones it does.

My aim was to retard the ignition 5 degrees because i had increased the compression ratio and under load the engine was pinking badly.

After fitting the other head which again pushed the compretion ratio up, i decided it was time to do this rather than relying on the fuel octane.

Its simply a matter of marking the reluctor ring on two teeth, bend the innermost teeth into the center with a small screwdriver, pull it out , bend the teeth back again with a big screwdriver with a twisting action (any other method seemed to bend the whole thing all over the place), place it in the groove with as close the amount of advance or retard you want and then hammer it home.

Job done

Hope this may be of use to some one

hope you rebalanced it!
LOL

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Good stuff. Well shared that man; It's nice when folks distribute information for the good of the community.

:)

what CR where you running?

Alex

AlexF

was around 10.7:1

now around 11.2:1


LOL and the ecu i have has a map for 9.4:1 with 37degrees total advance soon as you floor it.

Just got tiered of adding octain booster when i couldnt fint any 99 octane. That Shell V max stuff is shit, the valves made a lovely tune. The tesco 99 is the bollox though, dont use anything else.

Edited by Sprocket on 22nd Dec, 2006.

Might i add that it drives and sounds well, although thats not taking into acount the fact that i reset the addaptive values in the ECU so its not quite tuned itself yet. Time will tell.

can i just ask, whats the point of increasing the c/r and reducing the timing?

I've seen the future and tbh its Pie

I really am surprised that you ask this

Much the same when you said that the cr i was originaly running was to much for the cam im using

Not being funny but what am i doing wrong?????

nothing. the less advance you need, the more efficient the engine. less advance is better, but im sure you know this or you wouldnt have gone to all that effort :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

mean best advance


So this is/was a std ECU is it?

Alex

AlexF

sounds good to me keep up the good work

1293 Turbo mini

Yes Alex it is a standard non Cooper, Rover MEMS1.9 ECU

Bit of a setback:(


The SPi uses 5 degrees advance on turn over to start. Knocking the advance back 5 degrees, 11.2:1 compression ratio, 99 octane fuel and cold weather = difficult to start

Going to advance it by say two or three degrees again.

Other than that, it runs great, no pinking what so ever.

I realy do need a Cooper ECU, with the ignition map for 10:1 CR. There is also a diferent target AFR giving a bit more fuel on acceleration.

Been looking for one since June. Fynny thing is I've seen more MPi ECUs on ebay thant the SPi ones.

Any body got a Cooper SPi ECU from 94 to 96??

megajolt, sir?

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

MS,

why more fuel on acceleration... about 12.5:1 is best for most engine :S

ALex

AlexF

Yep, MJ would seem the answer to me. Put the reluctor ring in the flywheel back to where it was and leave the MEMS to do its thing with the fuelling, then add a trigger wheel and crank sensor seperately to control the MJ allowing mapped ignition to make the most of your other mods.

I've seen the future and tbh its Pie

The Non cooper has a slightly leaner, more economical target AFR for acceleration enrichment than the Cooper ones.

So, I'm not achieving all that I can.

As for the ignition I'll knock it back a couple of degrees for now and see how it goes. Its not that difficult to get to the clutch on my car.

Just buying time for the 16v as already said, cant afford to spend money on anything other than that. Full steam ahead you see

Increase in CR is unavoidable on 1399cc with standard cc heads. The head I fitted was 19cc Ex works group A, big valves and fully ported. It is FAR better than the standard unmodified head i was using, even with cracked seats, thats another topic.

There is nothing wrong with what I have done, its the ECU thats the problem, Like I said a Cooper ECu will be much better than the economical orientated piece of crap I have.