I've seen some racecars with O2 bungs on all 8 header primaries. Who makes a system that can read all 8 sensors? And log the data? Does anyone know where, or how much $$$? Thanks!

 

i think you need DFI/fast like system

 

MoTeC M-series engine management computer with ADL Data Logger option, or AutoMeter DataLogger, several others

AutoMeter ADL

Your looking at about $3K minimum for the MoTeC ECU, and another $3-4K for the ADL, and $3K for 8 wide-band sensors. And of course, the wide-band sensors only have a 500 hour life, so you will need to replace them about once a year.....

You might want to consider using 8 EGT's as an alternative to O2.

 

for a street car you might want to concider LT1 edit

 

They support 8 O2 sensors??? You typically will see two O2 sensors and then 8 EGT sensors. The O2 sensors trim the bank's fuel trim and the EGT gauges are used to balance the cylinders on that bank.

Current thinking is to use rapidly switching O2 sensors and by looking at an O2 sensor immediately after a specific exhaust pulse you can tune each individual cylinder on the bank with a single O2 sensor. I don't think this has made its way into aftermarket EFI systems yet though.

For most of us the time and money involved is not worth the minimal gains.

 

He asked for a way to "...read all 8 sensors? And log the data?". The systems I mentioned are multi-channel data loggers. I was not suggesting that the systems could actually control 8 individual cylinders... only a way to "read" and "log".

Sorry for any confusion.

 

Fred, that MoTeC ECU replaces my PCM? It's all pretty expensive.

How about monitoring 8 EGT sensors and logging the data? It could be standalone from the car's computer, just monitoring temps. Any systems available like that?

 

Minor benefits at our measly HP levels, would be neat though.

 

If you go to T. Byrne's personal website (not his T. Byrne Motorsports site), there is a picture of an aircraft-derived 8-channel EGT monitor built into the dash of a 4th Gen Camaro. It could display the temps on any one of the channels, and recorded the peak temp for all 8 channels. I think he said it ran about $1K. There are a number of low cost, modular data logging systems available that can log a huge number of data channels... just look through an issue of National Dragster and you are bound to find ad's for one or two of them.

Yes, the MoTeC will replace your stock PCM, and will allow you to tune individual cylinders for fuel, spark timing, and injector timing. And it will drive an 8 LS1 coil direct fire ignition system, using the optical signals from the Opti.... add $400 for the IEX 8-channel ignition driver. But it will not control A/F to the 8 cylinders based on 8 O2 readings. If you look at what was problably the most potent LT1 ever built, and used the MoTeC M48Pro, it had a single wideband O2 sensor to record (but not control) A/F ratio, and a single EGT sensor on the #7 runner. Tuning was optimized on an engine dyno, reading all 8 plugs after each pull, and little else. The O2 sensor data was logged, and used to tweek fuel, generally required only at tracks with excessive density altitude. If you can make that kind of power without monitoring all 8 cylinders, it probably wouldn't do too much for your basic street engine.... .