Compared to a WB O2 setup or the like, is it worth trying to get EGTs from both sides of the engine?

I think I've got a fairly inexpensive way to do this but I'm not going to spend the bucks if it would net me 0 usable info compared to a Wide Band setup.

 

EGT and WB are entirely two different items.

EGT is how close you are to the thermal limits of your engine. WB is for approximating your AFR.

For a **real** EGT reading you want to be within 1.5" of the exhaust valve (give or take). Much further then that and you have to allow for cooling, and then you're fudging the meaning of it.

EGT is reflective of Timing, and Fuel.
WB is fuel.
Using BOTH with let you figure out the Fuel and timing (to a large degree, but not completely).

 

I know they are two different items, I was wondering about the relationship and preference of one vs. the other.

In other words, would you start out with a WB before considering EGT or vice versa or does it matter (I'm guessing it does).

I'm betting you can feed a thermocouple wire into the AIR tube fitting on each manifold/header and hook that into a two channel meter to get a feel for EGT on each side (assuming no AIR pump). Most meters have a max hold, so you could get a reading on each side for a WOT pass without having to watch the meter. Granted this would only show maximums and not show dips in the temp curve but it would be a start.

However if it is "better" to start off with WB then I won't start down the EGT path until later (if at all).

 

The probe must be down in the exhaust flow, I mena down in it, anything less and all you've got is manifold temp..
Do a WB at least then you'll have one element of the tune about right.

 

Think big... 8 channel ADC, then run a CNP system and get indiviual timing chnages for each cylinder.

 

Once you convert to CNP, then all the other stuff is easy.
J+S already sells a K/S that trims individual cylinder timing.

 

I know that some of the buick GN guys were running haltech or some other manufacturers ECM it had a EGT for self A/F tuning instead of an O2 (pre- WB tech).

 

Here is some other info that I am curious about...maybe you guys running a turbo V6 can help me with.

I bought a 1995 Eagle Talon TSI AWD Turbo 2.0L (5 speed) for my daily driver. The guys at dsmtalk.com seem to think that the EGT is one of the primary tuning tools for this car. In fact, I rarely, if ever, hear of anyone worrying about putting a WB O2 sensor in the car.

Also, they say that the #1 cylinder runs the leanest and to put the thermocouple in that exhaust runner about 3-6" from the head. I think that a WB O2 sensor should be important too and that the EGT should be closer...but that is what my research on that board is interesting. BTW, there are some guys going fast that don't seem to be too worried about the WB O2 sensor...why not?

TIA, I would love to hear some feedback on this....

 

I must have posted this at a bad time...surely the tuning gods will answer soon

 

WBO2 is not as sensative as long as its near and warm, the A/F wont change that much in a distance of just a few inches. the EGT on the other hand the closer to the port the hotter so the closer the better because the further away the cooler it gets.