Introduction
I'm building a 1997 Hyundai Tiburon and trying to build it as fast street car.
So far the parts list is as follows:
ems- Vems 3.3 :)
turbo-garrett gt2876R
wg-Tial 38mm
greddy BOV
injectors- 780cc lowz
wiseco 83mm pistons
pauter rods
arp head studs
Status
I have hooked the vems to a 12v supply to start getting more familiar with it. All the sensors work but ive got a first problem with VR sensor but looks like people have had it already.
It seems like the signal is very low beacuse rpm gauge shows no movement as i connect the sensor(tried to change the polarity)
If the signal was erratic I would need some resistors to clean it but in my case what should be done?
megatune configuration is-rising edge, multitooth(60-2), no filtering
TRY2
I tried to generate a waveform and input it into vems as rpm signal but with no luck so far...
- method ?
- parameters ?
- result ?
- we use ElectronicDesign/TriggerSignalGenerator on linux, usually
- m631 (63+1 that is 64-1) only for testing
- or m582 for 60-2
- or c270 for 270 primary trigger pulse for 1 sectrig pulse (for auditrigger)
The minimum voltage(mV) for LM1815 (VR) to trigger is appr 50..60mV
- a PC soundcard with max volume is always enough
If you have HALL, the DC offset might prevent triggering, since the (usually internal 10k, but can be external too) pullup resistor pulls up signal to 4.5V or higher. A pulldown resistor (330 Ohm .. 1kOhm towards GND) can be used to pull the signal to 1 .. 1.5V mean value, the PC soundcard's 2V peak-to-peak signal should work from there.
I have VR sensor! Today I tried using a drill that had a screw attached to it and got the rpm reading upto 300rpm in vems but only when next trigger tooth was taken down to 2. With the another_trigger_tooth=1E (decimal 30) that will be used, one cannot rotate fast enough manually for the minimum RPM. This is OK.
My methods were really wrong as i understood by today i think. I just generated a sine with waveform generator but now i generated a test wave with the software you told! Will do the test this evening.
Will vems also start showing rpm from 50-60mV?
my vems setup is:
tdc after the trigger-45
nr of teeth on wheel 58
trigger tooth 1 - not sure about that
next trigger tooth 30
crank min period 900
Tried the soundcard testing today. Could not get the soundgen to work but used ordinary waveforum generator again and i saw the rpm. It increased as i increased the frequency but i also got the trigger error :(
Tested on a car also but with no luck yet. I think i would need a ossilloscope by the car to measure the signal...
Did some more wiring by now and tested the temp sensors. The intake air sensor seems to be off as it showd 30 degrees but it was around 20 outside but will confirm after some more testing.
I can read rpm now but it drops off after couple of seconds of cranking and then comes back again. The rpm reads around 160 while cranking-also little low i think. Will test little better cable tomorrow.