EG33 SVX engine trigger and base timing

Hello every one

I have a Thunder G4+ ECU and runing an EG33 SVX engine.

I am stuck in getting the teugger right

Below are the setup i have:

12 teeth crank sprocket and EJ25 CAS sensor

1 tooth cam sprocket and reluctor 2 wire cam sensor

I am not getting the chance to identify the proper offset and i need help.

All set up has been done perfectly and wiring is solid and done by advanced wiring company.

Please help me to get the correct offset 😔

Respect to all

Trigger setup below. Offset should be around 50. Those engines have 2 different crank trigger wheels stacked on top of each other, one with 12 evenly spaced teeth and one with 6 oddly spaced, so make sure you are using the 12T, from memory it is the frontmost wheel. The trigger scope can be used to confirm.

If you have trigger errors clocking up or erratic RPM when cranking then please do a scope capture and attach here.

Hey Adam

extremly sorry for the delay feedback.

Please note that the engine is working fine now. i had the trigger filtering for 1 & 2 are level 1. when i go back to my home country i will try the level 2 as per your suggestion and will let you know!

before i hade the offset to 60, the engine worked but with errors. after switching to 50 the engine started working with zero errors.

Thanks again Adam you are a true support value added tuner.

Hey Adam

extremly sorry for the delay feedback.

Please note that the engine is working fine now. i had the trigger filtering for 1 & 2 are level 1. when i go back to my home country i will try the level 2 as per your suggestion and will let you know!

before i hade the offset to 60, the engine worked but with errors. after switching to 50 the engine started working with zero errors.

Thanks again Adam you are a true support value added tuner.

Hello Adam and again I am sorry for the inconvenient.

I had issue with the engine (water jackets crack) had to replace the block and wait for the machine shop to close deck.

Now we are installing the engine back and we will fire I n 2 days.

The screen shoot you provided is working fine with me and the offset is dead right (50).

Just one concern (does this engine require high ignition degrees?) I was increasing the ignition table without any knock, also using pump 95 octane fuel!

I will get the knock sensor replaced and confirm though.

Cant wait for the power run of the E98 fuel

The EG33 is not a common engine and not one I have much experience with in terms of typical ignition advance. But assuming it is naturally aspirated, my guess is with the large bore, short stroke and nice combustion chamber, it will probably not be knock-limited - you will probably reach MBT advance before knock occurs.

Hello Adam and Thanks again

Please have a look at my base map

still no power runs, just determind the closed loop and did cruising on the dyno.... 3500 RPM and checking operational values.

I am Facing difficulties in defining the fuel level sender to show on the ECU and accordingly present on the aim dash.

The sender sensor was wired to temp 4 and the calibrated table (Non-linear) is on 7 and I did exactly what came in the link ECU content material. Still not showing proper readings !!

Any advise will be appreciated.

Thanks

Now the engine is running fine and the car is smooth.

Hiwever, now we have issue with trigger counter error

I am frustrated😠

I need help 😫

We scored 730 hp and 830 torque on 1.2 bar and now the link g4+ thunder trigger errors like crazy

Please do a triggerscope capture at idle and another at around the RPM when the trigger error occurs, make sure you save these as a log, not a picure. A PC log and a copy of your tune file would be useful also.

Hello Adam

Please note that for some reason the Link thunder is not saving the log of the trigger scope (attached your find the trigger scopes logged saved but no data !!!!)

Therefore, I loaded the pictures capture (which I am sure you are not looking for, but what else i can do). Also, you can find attached the tune file that I am using now.

I am really frustrated !!

Please help me!

Tune file

normal idl

normal idle with throttle

cutoff rpm with errors

Can you attach copies of the log files as well, It is pretty unlikely they dont have data, possibly you just dont have the correct channels displayed on your time plot.

These should have a reluctor sensor on the cam shouldn't they? Has it been changed?

attached the scope i was able to record

cam sensor changed to hall 3 wrires ... orginally was reluctor and yes we changed it

please ignore the pictures because it was taken wrong

All of the scope files show data fine. But there is such a mix of different set-ups and different problems that it is hard to know what im looking at. The file names dont seem to corelate well either. For example in one of the files labelled "idle" the crank sensor is generating +/-20V, so I doubt that was idle, one of the other files with "idle" in the name the crank sensor is generating +/-6V which is possibly closer to normal idle voltage but still 2 or 3 times "normal", so even that im not sure really was at idle?. In one of the scopes with a reluctor on the crank, the sensor is wired incorrect polarity and then in another it is wired correct polarity.

The hall sensor isn't giving a particularly nice waveform on the crank and I think the cam tooth is too narrow for the hall sensor so I think you would be better sticking with the stock sensors.

There are a couple of hints of possibly trigger error causes but nothing real obvious in these files. Can you do some further scope captures with the stock sensors and give more explanation of what we are looking for - i.e is the trigger error counter clocking up regularly every cycle or is it intermittent, or only at high load or high rpm etc.

Information and inputs

The car runs very smooth on idle and cruising until we reach 5K RPM and boost start kicking in, that is on both types of sensors (hall or reluctor).

Do you think this has to do with the crank sprocket?

Knowing that the sensor reluctor or hall are positioned in stock location and have exact same size and dimension.

Regards

Adam can you please advise if we can have a team viewer access for you and acces the car therefore we can kill everything on spot..... i will have the tuner, electrecian (wiring specialist) stand by for any request from your side.

Below you can have a look on the attached pics for the crank pulley customized to fit ej25 oil pump

the car today on the dyno while recording the trigger scope scored 840 hp on 1.5 bar boost :-( and yet still we are not done tuning the fuel or ignition table.

is that possible with you

do you have aphone number i can call please!??

Sorry no, I mostly visit this forum in my own time to answer any questions I can, Im not here to do remote diagnostics. Since your trigger issue mostly occurs around 5000RPM which is probably close to peak torque RPM, I would suspect it is most likely ignition noise interfering with your trigger signal. Since you only have 12T, you could run quite a heavy filter on trigger 1 without much consequence, so this may be enough to reject short spikes of noise. You also have good amplitude from both the cam and crank sensor so you could increase the arming threshold at high RPM quite a bit.

So my suggestions:

Refit the factory VR sensors. Try level 4 filter on both trig 1 & 2. Increase the arming threshold to 7V in the 5000RPM and above cells for trig 1 and 2. Make sure spark plugs are resistor type, coils are grounded to the cyl head, trigger sensors are shielded cables and those trigger cables are away from anything noisy. If you still have issue with those changes you are really going to need to get a standalone oscilloscope on it so you can do a longer and higher sample rate capture of the issue.