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Old 09-25-2009, 11:23 AM   #1
Fireblade893
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Egt and supercharged

hi..
i have buy a plx devices EGT and i weld it on my race header N3 cil...
but what temperature in WOT i can have??
more tuners says 850 c max for boost engine..
Anyone have it??
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Old 09-25-2009, 12:08 PM   #2
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Quote:
Originally Posted by Fireblade893 View Post
hi..
i have buy a plx devices EGT and i weld it on my race header N3 cil...
but what temperature in WOT i can have??
more tuners says 850 c max for boost engine..
Anyone have it??
I use 4 channel EGT for dyno work (onto CAN bus then to logger etc)

typically, I see 900-930 C at full chat - pipes are dam near translucent at this point:

For example:
http://video.google.co.uk/videoplay?...8828926365917#
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Old 09-25-2009, 12:14 PM   #3
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I use 4 channel EGT for dyno work (onto CAN bus then to logger etc)

typically, I see 900-930 C at full chat - pipes are dam near translucent at this point:

For example:
http://video.google.co.uk/videoplay?...8828926365917#
Holy shit! Would it be worth wrapping those pipes, Simon?
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Old 09-25-2009, 12:15 PM   #4
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Quote:
Originally Posted by Scuffers View Post
I use 4 channel EGT for dyno work (onto CAN bus then to logger etc)

typically, I see 900-930 C at full chat - pipes are dam near translucent at this point:

For example:
http://video.google.co.uk/videoplay?...8828926365917#
Wow, holy hot pipes Batman!
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Old 09-25-2009, 12:30 PM   #5
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Quote:
Originally Posted by erik loza View Post
Holy shit! Would it be worth wrapping those pipes, Simon?
well, you could, but what with is another debate, all the stuff I have used before just won't cope with these sort of temps, and if you do find something that can stand it, the pipes will only get hotter.

I have to say, I worries me when I see turbo installs in Civic's/Rsx's etc with the pipes right next to the cam cover/bulkhead etc, how long before they would melt though or set fire to something?

for the road cars, we use Nimbus heat shielding just about everywhere, but whist it's really good stuff, you still have to consider where the heat is going to end up...
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Old 09-25-2009, 12:40 PM   #6
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@scuffers

are the egt's in all cylinders about the same on rsx jrsc'd k20's?
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Old 09-25-2009, 12:40 PM   #7
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Wow...cool vid!

Thx for sharing
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Old 09-25-2009, 12:47 PM   #8
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damn glowing red hot... nice vid though
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Old 09-25-2009, 01:42 PM   #9
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well, you could, but what with is another debate, all the stuff I have used before just won't cope with these sort of temps, and if you do find something that can stand it, the pipes will only get hotter.

I have to say, I worries me when I see turbo installs in Civic's/Rsx's etc with the pipes right next to the cam cover/bulkhead etc, how long before they would melt though or set fire to something?

for the road cars, we use Nimbus heat shielding just about everywhere, but whist it's really good stuff, you still have to consider where the heat is going to end up...
I think the reason why they can get away with it is that most high-horsepower cars around here only generate that kind of exhaust heat on the dyno or during ricer street encounters, which is different that a real racing application. I do think that many would melt if they were run as hard as yours.
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Old 09-25-2009, 02:29 PM   #10
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cant we all just look at Mag's history to know that the turbo's have a danger of fire?
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Old 09-25-2009, 02:30 PM   #11
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Quote:
Originally Posted by rsamd View Post
@scuffers

are the egt's in all cylinders about the same on rsx jrsc'd k20's?
they vary a bit, the EP3 JRSC's are really bad, cyl 2 is usually some 50-60C hotter than the others, DC5 one is not so bad, usually only~10-20C spread, usually Cyl 1 is the coldest, 2&3 the hottest and 4 somewhere inbetween (assuming the exhaust is balanced etc.)

Quote:
Originally Posted by erik loza View Post
I think the reason why they can get away with it is that most high-horsepower cars around here only generate that kind of exhaust heat on the dyno or during ricer street encounters, which is different that a real racing application. I do think that many would melt if they were run as hard as yours.
Guess so, how hot can it get in 10 sec's?

(really not into this mile stuff....)
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Old 09-25-2009, 06:51 PM   #12
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nice thread
i have datalog today my egt in 3 cyl,4 th gear at WOT and i don't see over 590 C with 11.6 afr WOT...it's too low??
I have a issue with my egt..i want to put the output signal of my egt controller to the Kpro..hondata say to me use the ELD voltage pin (E15).!
Ok i have cut the old ELD voltage wire and next welded my output egt to the ecu (E15 pin)..
but with the ignition On i have a Eld in datalog of 1.20 volts..i start the car and this increase but...1.20 is too high...i have measured the output of my egt controller with egt sonde cold and i have abou 0.3 v...why this difference???
I do play with offset ELD input in the kmanager??
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Old 09-26-2009, 01:10 AM   #13
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Quote:
Originally Posted by Fireblade893 View Post
nice thread
i have datalog today my egt in 3 cyl,4 th gear at WOT and i don't see over 590 C with 11.6 afr WOT...it's too low??
I have a issue with my egt..i want to put the output signal of my egt controller to the Kpro..hondata say to me use the ELD voltage pin (E15).!
Ok i have cut the old ELD voltage wire and next welded my output egt to the ecu (E15 pin)..
but with the ignition On i have a Eld in datalog of 1.20 volts..i start the car and this increase but...1.20 is too high...i have measured the output of my egt controller with egt sonde cold and i have abou 0.3 v...why this difference???
I do play with offset ELD input in the kmanager??
the ELD input is pulled high (~5v) internally, whatever you connect to it must be able to pull it down to the (output) voltage of the device.

if it can't (and your looks to have this issue) you could try putting a resistor across it to ground, I would suggest you start with 1K.
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Old 09-26-2009, 02:46 AM   #14
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i don't understand..can you explain it to me??
where and how i put the resistor??
between the eld pin and the ground??
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Old 09-26-2009, 11:08 AM   #15
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Scuffers i have try today a datalog on 5 gear WOT from 2000 to rev limit and my max exhaust temp was 650 C..too low??
Is possible i have too ignition and i burn the fuel when the pistons go to the TDC??
From you experience...less ignition = more exhaust temp???
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Old 09-26-2009, 11:09 AM   #16
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Quote:
Originally Posted by Fireblade893 View Post
i don't understand..can you explain it to me??
where and how i put the resistor??
between the eld pin and the ground??
can't easily draw this, but yes, between ELD and one of the logic grounds.
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Old 09-27-2009, 06:10 PM   #17
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this not false my egt signal output to the ecu??
i have try today another datalog and max i see 650c wot...i can play with less ignition for see high exhaust temperature??i have try with less fuel and now i have 12.0 wot..but the temperature are low!
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Old 09-28-2009, 02:58 AM   #18
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Quote:
Originally Posted by Fireblade893 View Post
this not false my egt signal output to the ecu??
i have try today another datalog and max i see 650c wot...i can play with less ignition for see high exhaust temperature??i have try with less fuel and now i have 12.0 wot..but the temperature are low!
not sure I understand your first sentence?

temp depends on a lot of things, can you add some detail?

AIT?
Boost?
pulley ratio
fuel
Ignition timming
A/F's
Cam advance
etc...
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Old 09-28-2009, 03:40 AM   #19
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AIT?what is this?
boost 9.5 psi
pulley 3.2"
fuel 98 ron
ignition columns 11=26
12=24
13=22
af 12 WOT
cam advance high cam 50 and after 7000 rpm 45

i attached the datalog and kal..
Attached Files
File Type: kdl egt4gear-.kdl (104.2 KB, 4 views)
File Type: kal new belt tensioner4 afr 12 ok con wide mario4.kal (46.8 KB, 9 views)

Last edited by Fireblade893; 09-28-2009 at 06:38 AM..
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Old 09-28-2009, 01:20 PM   #20
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question,

where is the EGT probe? (picture)

also, how confident are you of it's accuracy and speed?

also, 7 sec's is a mighty fast 'run' for datalogging, make it more like 25-30 sec's and the senders have more time to react.
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Old 09-28-2009, 05:45 PM   #21
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the engine probe is at 3 cm (about 1 ") from the heade gaskest..see the picture
this is a datalog in 3rd gear..too low??
i can try it on 5 gear from 2000 to rev limit rpm for see if they have more time to react..
today i have try to less ignition about 3 at WOT and less fuel for have an af ratio of 12 and the egt are the same..about 650C
when i less ignition i have try to see the power curve with thetadyno and raz dyno..with less ignition i less power...the best is 22 in columns 13 for the best power curve with 12.0 -12.2 afr!!
i have attached the last datalog and last kal..
Attached Thumbnails
Click image for larger version

Name:	26092009110.jpg
Views:	19
Size:	431.8 KB
ID:	331847   Click image for larger version

Name:	26092009109.jpg
Views:	19
Size:	463.7 KB
ID:	331848  
Attached Files
File Type: kdl ef2.kdl (61.8 KB, 5 views)
File Type: kal new belt tensioner4 afr 12 ok con wide mario5.kal (46.1 KB, 7 views)
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Old 09-29-2009, 01:47 AM   #22
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not sure what to say, 650 is way lower than I would expect to see based on the loggs etc?

I would expect more like 800+

As for AF, best power is usually at the point where it's running lean enough to scare you, like ~13, that's not to say I would aim for that - the margin between good power and melted pistons is small....
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Old 09-29-2009, 02:58 AM   #23
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on my egt gauge read at the max 600 in 3rd gear, 630 on 4 gear and 650 in 5 gear!But on my street the 5 gear is only at 7000 rpm because is short the street!
if i can tonight i test the 5 gear at wot from 2000 to rev limit..i think they us about 20 sec of datalog!!!
i want to run safety and i have a street car drive normally..not aggressive!
I think 12.0 is the best..i read in more website that is the best for more power and safety..right??
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Old 09-30-2009, 02:51 AM   #24
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I have try the 4-5-6 gear full loadWOT and i don't see egt over 700 C..with 12.0 afr
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Old 09-30-2009, 12:34 PM   #25
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Thats my egt's. Sensor about 12cm from cyl.#1. http://www.youtube.com/watch?v=2OuMn1cZNss
Highest i had was ~820C on Track at 125C Oil Temp, 30C celsius ambient.

@Fireblade893

what is this plate for on the header?!
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Last edited by rsamd; 09-30-2009 at 12:37 PM..
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