i hear alot about tuning with a wideband but using a EGT in conjunction is not mentioned often. why dont people use these more often to prevent knock? i could hardly find info about what temperature on a TII should be. be nice to see before and after water injection too.

can someone recommend a decent egt sensor/meter for a decent price?

 

I dont use them truthfully, because I dont even want to know. ITs just one more thing to worry about..

Bad attitude I know, but it works for me.

 

i cant afford to not worry

 

Hi there, you should contact RICE RACING (pete) on www.ausrotary.com

He's an expert on water injected rotaries, and wideband tuning, AFR and EGT

not many people have experience with this field so you'll be hard pressed to find written info

 

hmm. thanks ill check it out.

 

Riiiiight...

Some of us have been using AI just as long as him, we have just progressed past the water stage.

 

Maybe look into the pineapple racing dual EGT. Nice in cordination with a wideband.

 

I don't get your point.... as I said "not many people have experience in this field" "you'll be hard pressed to find written info"

We are talking about EGT here, it's not as if Pete is the only man in the world that knows about WI/AI. I have water injection on my ******* tractor.


Great contribution there man.

 

I think he was saying there is a lot of info about AI, not a lot of info about EGT's.

As for EGT's, basically the lower the better. I think that the max you ever want is around 1500-1600, but that is an on-edge tune. Basically, if you're tuner doesn't know about them, then you shouldn't have him tune using EGT's. If he does know about them, then he already knows about them. If its for your regular driving, then its more of a baseline so you know if something is going wrong.

I know that BDC had a lot of stuff about EGT's in his alcohol injection thread on teamFC3S.

 

The benefits of WI as well as other forms of AI are WELL documented for reducing EGTs. There is PLENTY of documentation even running back to the 50s.

Its a forgone conclusion. Lower combustion temps, EGTs follow.

 

Egt isn't used as commonly as a wideband, because most egt gauges don't respond fast enough and aren't as straight forward to use. Anyone on this forum can use a wideband to tune, its super easy.

 

The way I understand it from the little i pick up here and there: the Wideband is good for power while the EGT is good for reliability.

I am barely going to start using wideband and I was recommended an EGT also but I just don't know enough about it.

 

Also EGTs can be very variable depending on where the probe is placed. 700C might be great on one engine but murder on the next. This is hard stuff to explain to a beginner who is confused enough by the display a wideband produces.

 

i was talking more about the egt sensors used WITH widebands. like in my instance i guess i would install it with the stock ecu how it is. do some logging and see where the temps are cause i know its safe right now. then i would put my megasquirt in and when tuning i would make sure the temps didnt rise much above that.

just wonder why i dont see more information on it i guess.

 

where would be the best place to mount it (by the turbo closer to DP? Several inches PAST the O2 sensor?at the exhaust manifold?)? what temperatures would you keep an eye out for( rotor damage at X*F/C)?

What reading do you recommend? books? online? or any source where I won't have to depend on anyone since I'm a tuning/engine management noob? I bought a book on engine management and it's helping a little but you can't read too much.

 

Wow, that's interesting...

There used to be a time when he used to argue against EGT use...


-Ted

 

And AI for that matter....

 

I use an egt gauge to watch trends, and lets me know when somethig isnt quite right

like when my decel enlean wasnt working, post turbine egt's increastesd 150c+ under heavy decel, wouldnt have noticed so soon if it wasnt for the egt gauge

 

Thats probably the best you can do other than just blindly finding the limit, there is information online but its all random, and case specific.

 

best place is on dyno with someone who knows what they are doing,

 

took my turbo II to Virginia International raceway and pegged my autometer EGT gauge (1600+) during runs. i had 100 octane unleaded in there and it was like 40 degrees out . never detonated or had any problems. and this probe was in the downpipe a couple inches behind a stock s5 turbo). btw, my gauge would hit 1400 degrees cruising on the highway under closed-loop

i would definately get the dual EGT gauge. the rear rotor always runs leaner and hotter.

 

The best place depends on your setup. If you have a divided manifold, you either need two EGT sensors or one sensor directly after the turbo. If you have an undivided manifold, you can place the sensor before or after the turbo.

The ideal temperature will vary greatly based on the location of the sensor and the engine combination. You need to establish a baseline for your engine so you can make judgements based on changes.

 

can someone recommend a good one with controller that logs? it seems like they are really expensive. 1x HKS sensor = $122, controller is $140 for a K type (witch i dont even know if the HKS is). thats $384 for 2x EGT setup (and thats on the cheap). an lc-1 wideband is $200! im sure an egt probe is less complex than a wideband probe and controller.

can someone recommend a cheaper one? im sure these are used for more than cars.

 

Zeitronix wideband has an input for EGT and they sell the sensor also. Quick respose time. I'd imagine all the EGT probes are K type i.e. alumel/chromel wiring.

 

hows the wideband compared to an innovate?

be nice to have another probe, it only has an input for one. seems like a good deal though.