ignition timing readout - microtech LT-12

[Edge]

who has a microtech LT-12

What is base timing for R33 series 2 - isn't it 20deg measured at idle?

Could you take a look at the log of timing position and tell me what your idle ignition timing is set at?

I read that the timing is meant to be 20deg in idle in neutral on the standard computer? Shouldn't it be the same on LT-12?

On the microtech data logging screen, mine reads 10deg at idle in neutral.

Is this indicative of incorrect base timing?

Also isn't the TPS supposed to go all the way to 100% - mine only goes to 99% and I wonder if this could be the cause of a lack of extra kickdown when the pedal hits the metal for the auto trans.

Does TPS wire go directly to the auto box? (don't have a w/shop manual to check)

Could calibration of the TPS have to be done specially for the auto subcomp as well? Maybe this is the reason that while the auto box works it doesn't work quite as well.

[Edge]

Would any of this cause my fuel economy to be like this:

22L/100km when gentle driving for tank

and

16L/100km when I hammer it for a full tank.

Also something else prominent - when I hit 7000 rpm and let go the accelerator, it stalls.

[Steve]

Your fuel consumption sounds like it hasnt been mapped at low load and cruise throttle.

I had a similar problem to you, I had AFRs in the low 11s for cruise (60 - 120kph) and better economy on boost where it was in the 12s - get the car on a dyno to check for sure.

Base timing for S1 R33 is 15deg

[Edge]

base timing for S2 R33 is 20deg though isn't it?

regardless isn't the microtech supposed to read higher than 10deg at idle then?

What I'm asking is - am I correct in assuming that you measure base timing at idle and that the microtech should show the same on its readings?

I'm may have to get it retuned with the base timing advanced?

[Edge]

what sort of A/F ratio should it be on low load and cruise throttle?

[666DAN]

Actually something interesting I'd like to know...what is the timing first thing on a cold start, Just after you turn the key?

[Edge]

I've asked someone and the only way you can know the base timing is to look at it on the engine. It is just a little hard to start and with readings of 10deg on initial start and idle it seems suspect to me.

666DAN - I will find out exactly once I have it rutuned full matrix mode. For 12.0 on full boost and 14.5 off boost. This should fix my fuel economy.

[JimX]

A lot of timing lights will show up double the actual timing. I went to set mine to 15 degrees, and it showed up as 30. Which is lucky, because that's where the last mark is on the pulley. If you want to set yours to 20 and your timing light also shows double, you might have to make your own marks.

[Ustasa]

If you are running waste spark on an ECU such as a microtech, then a average timing gun will show double the static timing then what it really is. A snap-on type gun has the waste spark correction option built into it.