Recent Posts

1

Projects & Installs / Product and ancillary pieces for 928 conversion

« Last post by vball23 on August 08, 2020, 03:58:10 am »

I have an 85 Porsche 928. It currently has a Vortech supercharged S4 engine from a 90 9284 S4. The original owner and car builder used the lh/ezf from 85, so no knock sensors, hall sensors, etc were used.
I have pulled that engine due to damage as a result of zero oil pressure at highway speed. I am replacing it with another S4 engine from an 89 928 S4. I want to utilize the knock sensors and such, so I was going to swap over to S4 LH/EZK computers, but I have been convinced to go with a VEMS setup instead. I will be swapping over the 32lb injectors from the old engine after having them cleaned. I already have a wideband O2 sensor, but it is only going to a gauge. The LH/EZF is being sent readings from a standard O2 sensor. Also, I have a set of new Porsche Cayenne coils, so I would like to go with COP if I can.

What kit do I need? What else do I need to use the COP with the coils I already have? Any other additions or upgrades I should consider? I am in Tennessee, so what vendor should I use?

2

Configuration / VEMS Ignition Configuration Change

« Last post by RogueEngineer on August 06, 2020, 06:34:28 pm »

My current VEMS system is set up for a single coil and distributor configuration, but I'm interested in changing to a 6-2 setup for a twin-plug flat-6 engine. What needs to change inside the VEMS unit to facilitate this change?

3

Wiring & Sensors / Re: EGT amplifier issues

« Last post by gunni on August 04, 2020, 04:53:31 pm »

Your best bet is to create a wiki page to get direct support

http://www.vems.hu/wiki/index.php?page=MembersPage

4

Configuration / Re: AIM MXG set up?

« Last post by gunni on August 04, 2020, 04:49:29 pm »

Do you have a config ?

5

Wiring & Sensors / Re: Traction Control Setup

« Last post by gunni on August 04, 2020, 04:45:53 pm »

Talk to the supplier of your ecu to determine what input features you have available too you.

6

Wiring & Sensors / Re: EGT amplifier issues

« Last post by Ellisd on August 04, 2020, 12:25:21 pm »

At little update, if anyone can shed some light on this it will be greately appreciated.

I've removed the EGT sensor ans short the 2 pads
https://www.dropbox.com/preview/20200803_140038.jpg

This gives me roughly ambient temp (22.1deg C on my 5v calibrated output)
https://www.dropbox.com/preview/20200803_140045.jpg

When testing the sensor by itself I get 0.1mv at ambiet temp.  This is with the sensor still in the exhaust manifold but on a stone cold engine left over night.
https://www.dropbox.com/preview/20200803_140218.jpg

When I start the car up and let it warm I get a reading of 17.1mv so from what I can tell that should mean the sensor is working
https://www.dropbox.com/preview/20200803_140922.jpg

7

Triggering / Re: Nissan Trigger Problems 16 12 8 4 (ca18det)

« Last post by derill3237 on July 28, 2020, 10:44:22 am »

Are you able to measure the signal output of the CAS via a scope or at least a multimeter?

Secondery trigger 4.52 - 0.09V
Primary trigger 2.05 - 0.05V

it looks that primary trigger in your ecu is vr not hall

SJ 2 closed
Primary trigger hall

and pullup resistor not changed

R30 4.7kOm

if I choose 36-1 camsync in the settings ..
signals from the crankshaft and camshaft sensor are visible in the log.
and when I choose nissan ...
does not see the camshaft sensor ..

did you know that one with small amount of slots goes to primary trigger and 360 one goes to sec trigger, and then when you select nissan trigger yes you wont see secondary trigger as I remember + if you want to see it you need to put ecu in safe mode

Thank ..
I probably understood what my mistake was ..

8

Triggering / Re: Nissan Trigger Problems 16 12 8 4 (ca18det)

« Last post by Kamuto on July 28, 2020, 03:59:36 am »

Are you able to measure the signal output of the CAS via a scope or at least a multimeter?

Secondery trigger 4.52 - 0.09V
Primary trigger 2.05 - 0.05V

it looks that primary trigger in your ecu is vr not hall

SJ 2 closed
Primary trigger hall

and pullup resistor not changed

R30 4.7kOm

if I choose 36-1 camsync in the settings ..
signals from the crankshaft and camshaft sensor are visible in the log.
and when I choose nissan ...
does not see the camshaft sensor ..

read this
http://vems.hu/vt/help/v3/v3_secondary_trigger_settings.html

http://www.vems.hu/wiki/index.php?page=InputTrigger%2FNissanTrigger

9

Triggering / Re: Nissan Trigger Problems 16 12 8 4 (ca18det)

« Last post by Kamuto on July 28, 2020, 03:56:05 am »

Are you able to measure the signal output of the CAS via a scope or at least a multimeter?

Secondery trigger 4.52 - 0.09V
Primary trigger 2.05 - 0.05V

it looks that primary trigger in your ecu is vr not hall

SJ 2 closed
Primary trigger hall

and pullup resistor not changed

R30 4.7kOm

if I choose 36-1 camsync in the settings ..
signals from the crankshaft and camshaft sensor are visible in the log.
and when I choose nissan ...
does not see the camshaft sensor ..

did you know that one with small amount of slots goes to primary trigger and 360 one goes to sec trigger, and then when you select nissan trigger yes you wont see secondary trigger as I remember + if you want to see it you need to put ecu in safe mode

10

Wiring & Sensors / EGT amplifier issues

« Last post by Ellisd on July 27, 2020, 09:42:58 pm »

I bought this EGT kit new with the sensors and pre wired it there's an issue with it:

https://www.vems.com/egt-amplifier-dsub9.html

Hi, I've now installed this sensor and getting values on a cold engine (left over night) of over 2v on the 5v output which works out at about 400C which obviously isn't right.  any idea where I should be looking or have I missed something with the wiring? I’ve also checked the 1v output and getting similar results.

Has anyone else had similar issues and if so can they point me in the right direction for what I should be checking?  I've tried emailing Vems a coupkle time but I've had no response