i dont know i guess it makes use of the LCD display and it was a package deal with boost sensor, EGT and Wideband

 

What factory EGT do you refer to? Do you mean the channel labeled "EGR Temp" in Evoscan? If so, has anyone confirmed the accuracy of this equation? Has anyone confirmed good correlation to a real EGT?

Where is this sensor located in the exhaust stream?

 

does anybody know where the best place to put the EGT sensor????

 

#2 runner a couple inches from the head.

 

this is another post , what do you guys think about the EGT sensor location???? but that is a nice a$$ manifold

 

https://www.evolutionm.net/forums/sh...ght=egt+sensor

 

https://www.evolutionm.net/forums/sh...ght=egt+sensor

 

The EGR sensor is in the recirculation heat crossover, and although the temps are accurate in that formula for that sensor, they do not reflect the Exhaust gas temp your thinking of, which you would use for tuning. This is the temp for an emission device (preheat the intake manifold, and exchange some heat into the intake to improve emissions on cold start) Or at least thats what I was led to believe..

 

Thanks, Jack. That was exactly what I thought.

It is interesting that on DSM's, it seemed like a very common thing that everyone had an EGT gauge, but on EVO's, it's very rare.

 

I think its mainly because so many people are using wideband 02s now. Back in my dsm days, I didnt know anyone that had a wideband 02. Everyone just had egt gauges and dataloggers to log knock and narrowband 02s.

 

Widebands have went from being an exotic and expensive tool (before people realized that the sensors were cheap to buy, and the controllers are now cheap to make) to a reasonable price..

If you have no choice, EGT is the second best way to tune with, but it can only tell you your EGT's are really hot, with the regular logging, you would see your knock counts, but unfortunately EGT's can be very hot for two reasons, too rich, or too lean, too rich and its hot because the fuel is still burning, it can be detrimental to your turbo, but might not do any damage do your engine, where running too lean will melt all sorts of stuff in the engine.. The heat is in the combustion chamber.

The best tool to use is a wideband O2 sensor, and an EGT gage.. but EGT only is really something that you have to be cautious with since you only have a narrowband sensor telling you if your rich or lean, but not quite accurate enough to know how rich or lean, which means you have to leave plenty of margin for error..

 

So lambda sensor + EGT = quantitate and qualitative monitoring
EGT only = qualitative monitoring

OK here's the big laugh, I have niether, and worst - I'm running a 14 month old custom job for mods I had before adding methanol and 10.5 HS.

I basically added timing and pulled fuel up to 0.9 in respective spray areas until knock vanished so I got my wad of clay. Now that I made a surprising forward progress of W/M power shooting from the hip, I have hit a wall.

I now need a way to measure burn and furthermore somehow try to comprehend my fuel map - I don't know if there is any substance to the jagged and beat-up group of numbers called my fuel map after a pre-EcuFlash HKS rs and fuel pump custom flash for it, not to mention my contibution, but without WB, I need it.

• So whats the WB of choice for just evoscan logging with precision - nothing fancy, just an accurate sensor?

 

The short answer, is Any of them capable of logging the data you need.


All I can say about your tuning without the instrumentation is a bit like precision shooting with a shotgun.. Sure some of your pellets may hit the target, but most will be nowhere close.. What I mean is, you have to tune very conservatively, but your not 100% sure how conservative your tune really is. So should you have an unexpected problem, you really don't know what sort of safety margin you have.

The honest truth is, people have been tuning by narrowband alone for a long time, and some have gone pretty fast.. But I'd much rather have the instrumentation to tell me If things are good, than be ignorant of it.