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EFI University Forum Index
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  Topic: Best sensors that come with scaling
RootesRacer

Replies: 18
Views: 13746

PostForum: Tuning Tips   Posted: Fri Jan 17, 2014 10:20 am   Subject: Re: Best sensors that come with scaling
What is everyone using for temp and pressure sensors for logging and which sensors come with scaling?

Scaling?

Temp sensors are usually if not always 2 wire RTD/thermistors.
These cannot be scaled, ...
  Topic: Parallel VR sensor install
RootesRacer

Replies: 6
Views: 3886

PostForum: Other   Posted: Mon Jan 13, 2014 1:55 pm   Subject: Parallel VR sensor install
Sounds like the best solution is to fit extra sensors at each wheel. ??

I think the transformers approach deserves a try.
Audio 600ohm 1/1 should work fine.
  Topic: Parallel VR sensor install
RootesRacer

Replies: 6
Views: 3886

PostForum: Other   Posted: Mon Jan 13, 2014 12:08 pm   Subject: Parallel VR sensor install
The answer totally depends on the input for each unit that shares the signal.

Some VR sensor amplifiers "float" the VR pair, others "ground" one input (other configs are possible ...
  Topic: WB gauge: best bang for the buck
RootesRacer

Replies: 142
Views: 143171

PostForum: Tuning Tips   Posted: Sat Dec 28, 2013 11:27 am   Subject: WB gauge: best bang for the buck

Some controllers are very sloppy, and require some form of calibration to get anywhere near 0.01 lambda accuracy. In controllers like that; free air calibration is a useful tool, but it is not to com ...
  Topic: DBW amp draw?
RootesRacer

Replies: 2
Views: 2644

PostForum: Other   Posted: Thu Dec 26, 2013 8:26 pm   Subject: DBW amp draw?
can be 10+ amps when the blade is opening abruptly.
Several amps when the blade is steady state.
Less current at low load, more current at WOT.
  Topic: 14Point7 SLC Free Open Source Wideband O2 Controller
RootesRacer

Replies: 15
Views: 19878

PostForum: New Product Announcements   Posted: Tue Dec 24, 2013 12:17 pm   Subject: 14Point7 SLC Free Open Source Wideband O2 Controller

Are you using the Bosch IC to control the sensor or do you implement the control in firmware?

No, it uses a 512kB 32 bit processor (tables and code) with RTOS and custom firmware conforming exactly ...
  Topic: 14Point7 SLC Free Open Source Wideband O2 Controller
RootesRacer

Replies: 15
Views: 19878

PostForum: New Product Announcements   Posted: Mon Dec 23, 2013 10:11 pm   Subject: 14Point7 SLC Free Open Source Wideband O2 Controller
Alan,

The 034 units are "hardened". The type of equipment you buy, install and forget it.

They are robustly designed for high vibration environments and offer electrical protection to the ...
  Topic: External coil driver circuit
RootesRacer

Replies: 14
Views: 23064

PostForum: Other Manufacturers   Posted: Sun Dec 15, 2013 2:30 pm   Subject: External coil driver circuit
The idea is to look up the datasheet for the driver transistor. 12A is plenty.
You should also be aware that "Logic level coils" and other such things are just marketing blurb. It's either a ...
  Topic: E85 and cranking spark to help cold start
RootesRacer

Replies: 12
Views: 8611

PostForum: Tuning Tips   Posted: Thu Dec 12, 2013 1:36 pm   Subject: E85 and cranking spark to help cold start
How cold is cold?, I changed over to E85 and drove all winter with no starting issues (probably down to -10c). I altered fuel by approx +30% but low load and cranking ignition were identical to petrol ...
  Topic: To "drive by wire" or not
RootesRacer

Replies: 24
Views: 19621

PostForum: Tuning Tips   Posted: Sat Dec 07, 2013 4:56 pm   Subject: To "drive by wire" or not
There are services that take stock throttle bodies and bore them out, then install an oversized plate.
This give more range of applications from common DBW hardware.

I have a friend that does this fo ...
  Topic: ITBs / Turbo / Cruise AFRs / Nightmare
RootesRacer

Replies: 95
Views: 69769

PostForum: Tuning Tips   Posted: Thu Nov 28, 2013 8:52 pm   Subject: ITBs / Turbo / Cruise AFRs / Nightmare
Lol. I didn't realize anyone even bothered to read what 'that' guy writes.

But now that I read it. It's kinda cute how such a condescending 'expert' is exposed.

Don't talk about Lance that way, I do ...
  Topic: M&W CDI misfire
RootesRacer

Replies: 46
Views: 36545

PostForum: Tuning Tips   Posted: Fri Nov 22, 2013 11:50 am   Subject: M&W CDI misfire
It seems every CDI vendor has a reliability problem.
I have repaired dozens of MSD boxes over the years and I've seen the odd M&W, AEM, Autronic and others that wouldn't spark.
MSD recently starte ...
  Topic: ITBs / Turbo / Cruise AFRs / Nightmare
RootesRacer

Replies: 95
Views: 69769

PostForum: Tuning Tips   Posted: Sun Nov 10, 2013 4:59 pm   Subject: ITBs / Turbo / Cruise AFRs / Nightmare
I am a fan of running a "mixed" mode fuel map (one that blends alpha N and speed density in their respective strength areas).

Speed density is horrible running an engine that makes spikey o ...
  Topic: ITBs / Turbo / Cruise AFRs / Nightmare
RootesRacer

Replies: 95
Views: 69769

PostForum: Tuning Tips   Posted: Sun Nov 10, 2013 1:16 pm   Subject: ITBs / Turbo / Cruise AFRs / Nightmare
I am a fan of running a "mixed" mode fuel map (one that blends alpha N and speed density in their respective strength areas).

Speed density is horrible running an engine that makes spikey o ...
  Topic: Any ECUs have 12 ignition outputs?
RootesRacer

Replies: 125
Views: 105048

PostForum: Other Manufacturers   Posted: Thu Oct 03, 2013 8:28 am   Subject: Any ECUs have 12 ignition outputs?

What did they say, just for information?
How much cylinders can the 710 control inj/ign sequentially?

8 injectors and 6 ignition. Some ignitions can be run as injectors.
Omex is responsive to quest ...
  Topic: Test my setup
RootesRacer

Replies: 20
Views: 20750

PostForum: Pantera EFI   Posted: Wed Sep 25, 2013 1:19 pm   Subject: Test my setup
Connection of a scope should not impact whether the ECU can successfully receive triggers (CAM or Crank).

Unless the measurement device has a ton of capacitance or somehow induces noise into the trig ...
  Topic: Test my setup
RootesRacer

Replies: 20
Views: 20750

PostForum: Pantera EFI   Posted: Wed Sep 25, 2013 10:20 am   Subject: Test my setup
Is it a Hall sensor?
Sounds to me like it should be powered by 12V not 5V. it's probably not switching properly at 5V.

Using universal VR sensor from 034 motorsports for crank, GM factory hall senso ...
  Topic: sporadic MAP sensor offset - possible?!?
RootesRacer

Replies: 24
Views: 14342

PostForum: Tuning Tips   Posted: Sun Sep 22, 2013 11:56 am   Subject: sporadic MAP sensor offset - possible?!?
Already checked that, the supply voltage is constant. :-(

To what level?

10mv of reference error can matter.
  Topic: sporadic MAP sensor offset - possible?!?
RootesRacer

Replies: 24
Views: 14342

PostForum: Tuning Tips   Posted: Sun Sep 22, 2013 11:52 am   Subject: sporadic MAP sensor offset - possible?!?
It's definitly not the sensor.
I checked another 4bar Sensor today -> same issue
I also checked another 2,5bar Sensor which i used for several years without problems -> better at idle, but when ...
  Topic: Need rotary expert advice
RootesRacer

Replies: 24
Views: 17694

PostForum: Tuning Tips   Posted: Sat Sep 14, 2013 6:14 pm   Subject: Need rotary expert advice
His strategy is not 720 degree "2 cylinder"

it is 720 degree, "4 cylinder sequential", that is, one injection event starts every 360 degrees on each rotor, giving symmetric fuell ...
 
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