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Re: egt monitoring
[Re: speedy383]
#698380
05/15/11 06:25 PM
05/15/11 06:25 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I monitor all 8... they work great for balancing the intake... I use a data logger called a Informer... make sure all the probe ends are in the same spot... I set mine exactly 1" from the flange surface 
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Re: egt monitoring
[Re: Diablo]
#698382
05/15/11 08:58 PM
05/15/11 08:58 PM
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Joined: Oct 2005
Posts: 976
ontario canada
mac56
super stock
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super stock
Joined: Oct 2005
Posts: 976
ontario canada
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Quote:
Last year I monitored only 2 cylinders. This year i have bought the Data Quest from logitech. I needed to know A LOT more info and this will give me what I need.
If your EGT's are all close you have a good balance, then turn to reading your plug burn. Last year my EGT's were around 1100-1150. But a pulling run is more like 15-23seconds.
What system did you use last year DJ?
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Re: egt monitoring
[Re: mac56]
#698384
05/15/11 10:04 PM
05/15/11 10:04 PM
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Joined: Apr 2005
Posts: 1,106
Quebec, Canada
Diablo
super stock
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super stock
Joined: Apr 2005
Posts: 1,106
Quebec, Canada
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Quote:
Quote:
Last year I monitored only 2 cylinders. This year i have bought the Data Quest from logitech. I needed to know A LOT more info and this will give me what I need.
If your EGT's are all close you have a good balance, then turn to reading your plug burn. Last year my EGT's were around 1100-1150. But a pulling run is more like 15-23seconds.
What system did you use last year DJ?
We used a computech System... it only reads 2 EGT's and RPM.... it was a good starting system but we now need to know how the fuel is effecting the EGT's through the run with our high speed pills and secondaries. The Data Quest will graph everything for us and plus we can add all kinds of neat things to it... I pretty much have my next 5 years of Xmas and B-day present planned out 
U looking for a EGT reader?
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Re: egt monitoring
[Re: camastomcat]
#698385
05/15/11 11:29 PM
05/15/11 11:29 PM
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Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Quote:
Alot of the temp you see depends on the distance from the flange you are. I have 3 different sets of headers and I suggest the probes all be the same distance from the flange. Ideal would be 1 3/4 from the flange and alcy should be around 1150 to start and tune by the plug, as mentioned.
I have seen more than one expert say that ideally they should be in a spacer between the head and header. The closer to the head the better.I install mine as close as possible on the dyno.
Keith
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Re: egt monitoring
[Re: Dunnuck Racing]
#698386
05/15/11 11:40 PM
05/15/11 11:40 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Alot of the temp you see depends on the distance from the flange you are. I have 3 different sets of headers and I suggest the probes all be the same distance from the flange. Ideal would be 1 3/4 from the flange and alcy should be around 1150 to start and tune by the plug, as mentioned.
I have seen more than one expert say that ideally they should be in a spacer between the head and header. The closer to the head the better.I install mine as close as possible on the dyno.
Keith
Thats the problem we ALL have a number we like to
put them in at... being that I worked in the exhaust
lab I tried to get everyone to put them in at a set
distance... which was 1" so we could talk apples
to apples... all the headers I built I put them in
at 1"... plus it was a easy number to remember
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Re: egt monitoring
[Re: MR_P_BODY]
#698387
05/16/11 12:22 AM
05/16/11 12:22 AM
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Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Thats the problem we ALL have a number we like to put them in at... being that I worked in the exhaust lab I tried to get everyone to put them in at a set distance... which was 1" so we could talk apples to apples... all the headers I built I put them in at 1"... plus it was a easy number to remember
I agree,
I am trying to look as closely as I can at the temperatures seen in the combustion chamber,so the closer the better.A better way would be to look at the actual chamber temperatures but it is an expensive thing to accomplish.
In theory,as long as you check the plugs and get a reference egt number to go with them,then you have a number to aim for after making any changes.
Keith
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Re: egt monitoring
[Re: Dunnuck Racing]
#698388
05/16/11 03:00 AM
05/16/11 03:00 AM
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Joined: Jan 2003
Posts: 6,138
Melbourne , Australia
LA360
master
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master
Joined: Jan 2003
Posts: 6,138
Melbourne , Australia
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Has anyone experienced rich mixtures throwing off EGT values? by that I mean raw fuel igniting in the headers and giving off ultimately false readings?
Alan Jones
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Re: egt monitoring
[Re: LA360]
#698389
05/16/11 10:31 AM
05/16/11 10:31 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Has anyone experienced rich mixtures throwing off EGT values? by that I mean raw fuel igniting in the headers and giving off ultimately false readings?
Yes I've seen that... also really late timing...
they all will mess with the EGT reading... knowing
whats going on and also looking at the plugs goes
along with the readings
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Re: egt monitoring
[Re: neonic]
#698392
05/16/11 07:13 PM
05/16/11 07:13 PM
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Joined: Oct 2005
Posts: 976
ontario canada
mac56
super stock
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super stock
Joined: Oct 2005
Posts: 976
ontario canada
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Quote:
So why EGT monitoring? why not a wideband sensor. We run carb alcohol talking to APD they claim EGT's on alcohol are a waste of time. 
What system do they recommend?
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Re: egt monitoring
[Re: neonic]
#698393
05/16/11 07:40 PM
05/16/11 07:40 PM
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Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing
master
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master
Joined: Mar 2007
Posts: 3,300
Northern Indiana
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Quote:
So why EGT monitoring? why not a wideband sensor. We run carb alcohol talking to APD they claim EGT's on alcohol are a waste of time.
For checking distribution problems,and remember that an oxygen sensor is usually mounted in the collector so you are getting an average reading from all the cylinders on that bank.I have seen some guys run oxygen sensors in each header tube to get accurate results
Keith
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Re: egt monitoring
[Re: Dunnuck Racing]
#698394
05/16/11 08:14 PM
05/16/11 08:14 PM
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Joined: Apr 2005
Posts: 1,106
Quebec, Canada
Diablo
super stock
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super stock
Joined: Apr 2005
Posts: 1,106
Quebec, Canada
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Quote:
Quote:
So why EGT monitoring? why not a wideband sensor. We run carb alcohol talking to APD they claim EGT's on alcohol are a waste of time.
For checking distribution problems,and remember that an oxygen sensor is usually mounted in the collector so you are getting an average reading from all the cylinders on that bank.I have seen some guys run oxygen sensors in each header tube to get accurate results
Keith
EGT's are to find perfect balance for each cylinder. I know some that will change half jet sizes for each cylinder to find a balance.
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Re: egt monitoring
[Re: neonic]
#698396
05/16/11 10:48 PM
05/16/11 10:48 PM
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Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
Biginchmopar
pro stock
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pro stock
Joined: Nov 2010
Posts: 1,397
Carson City, Nevada
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Speedy, I already bought the computech EGT setup and I'm going to start with the back cylinders to get close then move to the other cylinders one at a time. Might take more passes but I'll get it in the ballpark. My combo is Injectorators on a tunnel ram so the manifold is not that much of a concern. 
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You can cool the EGT readings with to much fuel or to little 
Same thing on timing 
Piston aircraft motors use lean of peak with 50 to 75 F degrees of peak on turbocharged motors and 25 to 75 F degrres rich of peak on N/A motors 
