416 replies to this topic

[timmy850]

Ok that’s good. Mine is an Innovate and they suggested doing the calibration prior to use

Other than verifying cam & ignition timing (anything around 10 at idle) and the mixture I can’t really see what else would cause a glowing manifold?

[sonscar]

I would be looking for about twenty degrees at idle.Old trick,adjust timing and mixture at idle to get lowest MAP reading.Retarded timing quickly gets the manifold red hot.Steve..

[KTS]

spent a bit of time over the weekend trying to figure out what's going on, and it seems like there's a discrepancy between what the ignition timing on the map and what i'm seeing with a timing light

 

the map say 9 degrees advance at 1600rpm

 

 

the timing light says 0 degrees !

 

 

OK - so if it's out, maybe i add 9 degrees to the map and see if that helps

 

..this time the map is at 25 degrees at 2000rpm

 

 

..and the timing light says c.16 degrees - so still about 9 degrees out.

 

 

..what's confusing is that the base offset is 72degrees (i.e. 18 degree offset from the default), but the timing discrepancy seems to be 9 degrees.

 

What's also odd is that when the nodiz software is showing 2000rpm, my smiths tacho shows 3000rpm...

 

i've raised a support ticket with nodiz supplier, and will see what they suggest.

[timmy850]

Did the Nodiz come with the trigger wheel, sensor and bracket? Was there a designated position to install the trigger wheel on the crank?

If the timing marks were verified against TDC then I think it’d be best to keep adjusting the offset until the timing light and system advance are the same

Was the tacho signal wire included in their loom?

[71Pickup]

Is you rev counter set for a 4 cyl engine? Sounds like it could be set for a 6 cylinder engine

[sonscar]

Adjust the offset or whatever it is(I have no experience of nodis)The map should represent the correct figures.By 1600 rpm I would be expecting 20 degrees at least.It goes almost without saying that the actual timing must match the commanded timing.You are getting there.Steve..

[KTS]

Did the Nodiz come with the trigger wheel, sensor and bracket? Was there a designated position to install the trigger wheel on the crank?

If the timing marks were verified against TDC then I think it’d be best to keep adjusting the offset until the timing light and system advance are the same

Was the tacho signal wire included in their loom?

Trigger wheel and sensor were sourced separately from the ignition unit. Instructions suggest mounting so that the missing tooth is 90degrees btdc, but as the trigger ring is machined into the harmonic damper I can't adjust that. Nodiz unit allows up to 50degrees adjustment on the base offset, so shouldn't be an issue.

After spotting the timing discrepancy I adjusted the map and added 9 degrees to all the figures to, in theory, get the timing to something that should work. Running with that map was an improvement, but still resulted in glowing headers after a minute or so running at 2000rpm

[KTS]

Is you rev counter set for a 4 cyl engine? Sounds like it could be set for a 6 cylinder engine

I did wonder whether I'd set the tacho incorrectly, but have re-checked/reset to what the instructions state for a 4 cylinder wasted spark setup, which is to set it half the cylinder count

[KTS]

Is you rev counter set for a 4 cyl engine? Sounds like it could be set for a 6 cylinder engine

I did wonder whether I'd set the tacho incorrectly, but have re-checked/reset to what the instructions state for a 4 cylinder wasted spark setup, which is to set it half the cylinder count

Having re-read the instructions, it actually says connect the signal lead to one coil only and halve the cylinder count. As the signal is coming from the tacho I better set it back to 4

[KTS]

Is you rev counter set for a 4 cyl engine? Sounds like it could be set for a 6 cylinder engine

 

 

Turns out the tacho was set correctly for the wasted spark setup, but whilst checking it was setup properly, it occurred to me that if the tacho was set correctly, the ECU must be sending the wrong signal, so changed the tacho to 6 cylinder mode, and it tracked perfectly against the ECU rpm display.

 

So it looks like the issues i've been having trying to get the timing sorted may be because they've sent me an ECU for a 6 cylinder engine.  Hopefully they'll come back with a response early next week.

 

with the engine work parked, time to get on with another job that's been on the cards for a little while; side repeaters for the indicators

 

I've been looking for something suitable for a quite a while, and finally managed to find some motorbike lights that i liked the look of - only downside was that the bike shop selling them was in Perth, WA.

 

 

..a couple of holes drilled later, and they're fitted.  Still need wiring in though, which means opening up the loom as i wasn't farsighted enough to add spurs for side repeaters when i overhauled the wiring.

 

[sonscar]

In my experience the engine will not run if set for the wrong number of cylinders.The RPM in the tuning software will be correct.Steve..

[KTS]

In my experience the engine will not run if set for the wrong number of cylinders.The RPM in the tuning software will be correct.Steve..

I'm not questioning the rpm the ecu is showing, but that the tacho output from the ecu correlates to what would be expected of a 6 cylinder engine

[timmy850]

I think if it was running wasted spark and 6 cylinder mode it’d probably have enough sparks at almost the right time to run. But how those signals would correlate to a 4 cylinder coil pack I have no idea

If you checked the ignition timing on #4 it should show the same as #1 on the crank pulley.

[KTS]

I think if it was running wasted spark and 6 cylinder mode it’d probably have enough sparks at almost the right time to run. But how those signals would correlate to a 4 cylinder coil pack I have no idea

If you checked the ignition timing on #4 it should show the same as #1 on the crank pulley.

 

1 & 4 are firing at the same time as they're on the same bank on the coil pack, and show the same timing as expected

 

I have managed to get to a point where the engine is running without looking like it's going to burn the exhaust valves out or melt the exhaust, and so was able check the timing at a number of different points on the advance curve, which has produced some interesting results:

 

at 1200rpm with the map set to 15degrees advance and withe base offset set to 82degrees, the timing light shows around16 degrees advance

 

at 1600rpm with the map set to 20degrees advance (thanks Steve!), the timing light shows around 18degrees advance

 

at 2000rpm with the map set to 27degress advance, the timing light shows around 22degrees advance

[sonscar]

Crank sensor wiring may be reversed( dim memories of similar fault with megasquirt),Steve..