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MUX-8A Upgrade to BC-5R
Upgrade from the MUX-8A to the BC-5R
- Record data from newer EI instruments, including CGRs and MVPs.
- Configure to interface with 7 E.I. and 1 GPS instruments.
- Consolidate data into a single, time-stamped view of engine performance.
- Download & monitor large amounts of data effortlessly via a USB memory stick.
- Analyze data easily in a simple CSV spreadsheet format.
- Export information into graphs to see & analyze trends.
- Enjoy greater flexibility with fully customizable options.
- Access a comprehensive overview of your engine’s health.
- Easily identify & prevent problems to save money on costly repairs.
- Fly safely and with confidence.
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Product Overview
BC-5R Overview

The BC-5R is a multifunction Data Recorder, designed to record data in five categories. The BC-5R is encased in a 3.80″ x 2.64″ x 1.6″ gold-plated enclosure. The BC-5R can be mounted under the instrument panel or in an equipment bay. It comes equipped with a USB cable and data stick for accessing stored data.
Time Stamps:
The BC-5R incorporates an internal clock that is used to Time Stamp each row of data as it is recorded.
Event Lines:
The BC-5R is capable of monitoring up to three Event Lines. These Event Lines are normally used to mark data for flight testing.
Bus Voltage:
The BC-5R monitors and records bus voltage to the instrument.
Engine and Aircraft Data Recording (Channels 1–7):
The first seven channels of the BC-5R are configured to interface with Electronics International’s (E.I.’s) engine/aircraft instruments.
GPS Information (Channel 8):
The eighth channel of the BC-5R can be used to monitor GPS data. This is normally Moving Map, Aviation or NMEA data. The data records are Next Waypoint Name, Latitude, Longitude, Ground Speed, Altitude and Track. If this channel is not used to monitor GPS, it can be configured to monitor an additional E.I. instrument.
Visual Status Indicator (VSI):
The Data Recorder is equipped with a multi-color LED designed to display the system’s operational status through various colors.
Data Recording Examples
Step One:
Download data onto USB memory stick
Step Two:
Download data from USB memory stick to spreadsheet
Step Three:
Export data into easy-to-read graphs to see trends & potential issues
Conclusion:
Prevent costly maintenance issues & invest in flight safety by using E.I.’s BC-5R’s powerful engine analysis capabilities.
Prices
Retail Prices
Packages include:
- 1 BC-5R Data Recorder Package
- 1 BC-5R & MUX 8A Replacement Harness
- BC-5R Upgrade from MUX-8A Installation Instructions
BC-5R Data Recorder
BC-5R MUX-8A Replacement Harness

BC-5R & MUX-8A Replacement Harness
Description
Package
Retail Price
BC-5R MUX-8A Replacement Package
BC-5R-MUX-8A-Replacement-Pkg
$648
Specifications
Specifications
Dimensions
3.88″ L x 2.65″ W x 1.80″ H
Weight
0.6 Lbs
Power Requirements
7.5 to 40 Volts
0.025 Amps at 24 Volts
Certifications
FAA-Approved
Input Lines 1–7
- Receives an RS-232 signal at baud rates of 9600, 19200, 38400, and 57600
- RS232 or UART Format: 8 data bits, 1 start bit, no parity, can be either normal or inverted polarity
- Data must be terminated with a carriage return (oDh) line feed (OAh)
Input Line 8
- The eighth channel of the BC-5R can be used to monitor GPS data. This is normally Moving Map, Aviation or NMEA data. The data records are Next Waypoint Name, Latitude, Longitude, Ground Speed, Altitude and Track.
- If this channel is not used to monitor GPS, it can be configured to monitor an additional E.I. instrument.

Videos
Product Videos
Documents
Documents & Manuals
Testimonials
Customer Testimonials
Keep it up. I’ll keep coming back.
We chose your product because of the great support and reputation your company sustains.
I really enjoy your products [because they are] simple and easy to use and affordable.
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Zach J. from Alaska
- Aircraft
Piper PA-16 Clipper
- EI Instrument
I won a FP-[5]L and had it installed in my c150. I was/am impressed with the accuracy and ease of operation of the FP. I wanted a new tach and I trust (and verified) that the EI R-1… would be my best choice. I am not a rich man. These instruments are affordable and incredibly accurate. Already planning my next buy from EI.
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Charles M. from South Dakota
- Aircraft
Cessna 150F
- EI Instrument
I installed a VA-1A Volts/Amps Insturment [sic] in my 1970 V35B to replace the original analog amp meter. What a great dual purpose digital gauge! Installation was simple and the product is very well made. It goes well next to my SuperClock I installed a couple of years ago. EI makes great products and this one will satisfy the most discriminating owner.
- Customer
Brewer P. from Mississippi
- Aircraft
Beechcraft Bonanza V35B
- EI Instrument
Electronics International is an exceptional company with exceptional products… Oregon company, great products and great people.
The reviews online were very good. Customer service has been great.
Just about to begin flying with the EI MVP-50P, so no in-flight feedback yet. But I did study the user manual, then sat in my plane going through the screens, menus, etc. It was very easy and intuitive to locate everything, so I’m confident that it will become second nature to do this in flight… Very happy with all interactions with EI.
- Customer
Robert B. from California
- Aircraft
2002 Diamond DA40-180
- EI Instrument
Very complete and thorough packaging. Well-prepped wiring harnesses. Quick and efficient turnaround time. Great communication throughout the process.
- Customer
Parker C. From Georgia
- Aircraft
Beechcraft Bonanza J35
- EI Instrument
You folks do a great job. Keep up the good work.
- Customer
Kevin D. from Missouri
- Aircraft
Cessna 172 Skyhawk
- EI Instrument
[Customer service] is great!
- Customer
Paul Z. from Oregon
- Aircraft
Cessna 182A Skylane
- EI Instrument