RumRunner

As inexpensive as the Innovate stuff is now, there is no reason not to run O2. Back when we ran the Delphi stuff, or Horiba we were spending well over $1100 per cylinder. By the time you put one in each hole, and had backups it got really pricey especially since they wouldn't last long. I use a lot of the Innovate stuff for drivability testing, and have had great results with it.

jeffswav

The O2 sensors sound great but I don't see the value if you go with the wide band. If you want to monitor both manifolds, you need two gouges and 2 sensors. Looks like about $800. I can get a dual pyrometer for less than $250. Can you mount the probes in the same location as the O2's. It will obviously need some sort of reducer to go from 19mm to 1/4".
Thanks,
Jeff

phughes69

EGT's need to be as close to the exhaust port as possible, so if your O2 fittings are 30 or so inches away from the exhaust port, EGT's will NOT work. the heat lost will give you an inaccurate reading. Jeff are you wanting to put this on one motor or two?

Mr Gadgets

Thats good to hear Rum,, I am hoping for good things with this new setup.. The Cutler I am running now is hard to fool..

RumRunner

You're generally just going to use the O2 for testing, and dial-in, so really one unit is all you need. You can then switch it from side to side if you have multiple bungs in place. An EGT probe should be between 2.5" and 3.5" from the head.

jeffswav

I am wanting to calibrate my PCM correctly, but I would also like to monitor the engine for problems. I recently had a intake cam lobe go down after only 75 hours on a fresh motor. I would have like to have known I was running lean on #5 before I melted a piston. I have a single engine but if you don't monitor both sides you are not getting all the information you need. My sensor bungs are about 14" from the heads. Is this to far away? I think this is where Eddie Marine also puts their K probes.
Thanks
Jeff

RumRunner

I wouldn't mount a K type probe that far away from the cylinder head.

Mbam

It's been awhile since I built an engine, but in my experience the T couple is only useful once you have the engine tuned. There is no absolute number that means good. Detonation will cause EGT to drop. A blower & a lot of overlap will give you scary EGT's. Once you get really out there on a blower motor (1400 - 1500 HP) a good portion of the fuel is cooling the piston, so conventional wisdom on FA is also out the window. We tuned the last big engine i did with a bore-scope, if there was soot on the piston it was good to go. Otherwise it would melt.

I will say all this was abut 10 years ago (how time flys) and we did not have piston oilers.