Syvecs Forums

Have fitted a Borg Warner turbo speed sensor with an S6 Plus ECU. I'm having difficulty achieving a good, consistent reading from the sensor. Below 3k engine revs, I generally get nothing in the form of a speed signal, though a trace view of the input shows a good voltage signal square-wave form. Above 3k engine revs, the speed reading is intermittent. Are there any known good settings for this sensor and the EFR 7/14 blade turbos?

Hi

I have one fitted on my efr9180 romain set it all up, I get a constant reading from mine not sure there to many people what have fitted these to the syvecs

Daniel a wrote:Hi

I have one fitted on my efr9180 romain set it all up, I get a constant reading from mine not sure there to many people what have fitted these to the syvecs

Can you post up your settings?
I am going to fit one up soon (same turbo) on S8C

Do you have a log showing the sensor output?

I presume you are using a thermistor input, 1v low threshold, 4v high thresholds, 1 tooth per reading and the scaling will depend on the number of blades on the wheel being read per revolution, and the number of pulses the sensor spits out.

No log yet. The car was back burnered for a couple days. Getting back into it today. I did play with it again the other day and I'm not getting pulses from the sensor in trace view at idle. When I rev the engine with no load pulses start to appear around 3k rpm but there are some skips. I've used both 5V and thermistor input with the same results. At this point, with the trace view reading poorly, I'm more inclined to think it's a sensor issue than a Syvecs issue. I've emailed about it with Ryan and will send him the logs when we have them and I'll post them here for the group.

As always, Ryan got me going. These are the settings he sent over and they've worked perfectly.

Input configuration -thermistor
Low threshold - 1.25v
High threshold - 2.75v
Number of teeth - 1
Speed scaling - .571
No signal detection speed - 3000
No signal can recover - yes
Slow on load detection min speed - 4000
Slow on load detection min manifold pressure - 23.21
Slow on load min turbo speed - 20.0 krpm
Slow on load detection time limit - 500 ms
Spike delta turbo speed - 25.0 krpm
Spike count limit - 3
Rate of change limit for de-spiked reading - 2.0 kprm

Out of interest, any details of the sensor, pics of it installed etc ?

I guess the EFR already has a port for the sensor ?

I don't have any. Go to the Full-Race website and they have all the info you could want. The compressor cover has a cast in boss. You just need to drill out the rest of the cast in hole for the sensor with a 1/4" bit, deburr it, and bolt the sensor in. Half hour job if it's not difficult to access and remove the compressor cover.

C. Ludwig wrote:As always, Ryan got me going. These are the settings he sent over and they've worked perfectly.

Input configuration -thermistor
Low threshold - 1.25v
High threshold - 2.75v
Number of teeth - 1
Speed scaling - .571
No signal detection speed - 3000
No signal can recover - yes
Slow on load detection min speed - 4000
Slow on load detection min manifold pressure - 23.21
Slow on load min turbo speed - 20.0 krpm
Slow on load detection time limit - 500 ms
Spike delta turbo speed - 25.0 krpm
Spike count limit - 3
Rate of change limit for de-spiked reading - 2.0 kprm

Thanks

I have to do one of these too However, my turbo is on the smaller B1 frame. It only has 12 blades to the 14 of the larger B2 frame. The BorgWarner sensor outputs a frequency signal. Should I just adjust the speed scaling the difference in % between the 14 and 12 blade wheels? or is there something else I need to change? The math shows about a 14.3% reduction in blades and this converts directly to the math to determine the total frequency reduction as well.