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Old 02-17-2004, 01:02 PM   #1
Terbeauwrx
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Question Autometer EGT Gauge Question

I have a Autometer Carbon Fiber EGT gauge I am wondering what is the safe temp range I should be running? Right now I am running the COBB tuning stage 2 reflash, APS CAI, HKS SS BOV, Full 3" exhaust, Ported stock header, Exhaust Depot catless uppipe, stock TD04, stock TMIC. I also have a HKS EVC 5 boost controller set at 15 psi. Under full boost my gauge is reading 1400 degrees and at a cruising speed of 60 mph it is about 700 to 800 degrees. Another thing is my CEL is been comming on and when I plugged a OBD computer into it , it says I am running lean? I just want to make sure that I am not going to burn a hole in one of my pistons. Any help would be Great
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Old 02-17-2004, 01:16 PM   #2
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Where exactly is your probe mounted?? Those temps are too cool. I am running a stock car right now and i run about 1200-1300 degrees at 60mph and under full boost or going over a mountain pass, its about 1550 degrees. I have the autometer CF EGT gauge and a Westach probe; Mounted where 1 & 3 come together on the header.
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Old 02-17-2004, 01:43 PM   #3
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I mounted it where I was told would be the recommended place. About 4 inches away from the turbo exhaust inlet on my uppipe.
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Old 02-17-2004, 02:00 PM   #4
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would be better 4" from the exhaust ports, as per autometer's recommendations.

jm2c
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Old 02-17-2004, 02:06 PM   #5
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Most people, drill and tap the exhaust manifold on the Y where 1& 3 meet, or 2 & 4. The uppipe is too far away.

I would move your probe and then repost if your EGT's are still off.

Last edited by Aaron'sWRX; 02-17-2004 at 02:27 PM.
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Old 02-17-2004, 02:33 PM   #6
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That is not what My directions said. Maybe for a non-turbo car that is where you would place it, but for a turbo car it says to place it before the turbo, Because if you haven't noticed that the factory EGT it on the uppipe as well.
This is from the Autometer install instructions and I Quote: "For Turbo engines, install the probe 1-2 inches from the turbo exhaust inlet." It says that on the very first line in the probe install.
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Old 02-17-2004, 02:50 PM   #7
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Quote:
Originally posted by Terbeauwrx
That is not what My directions said. Maybe for a non-turbo car that is where you would place it, but for a turbo car it says to place it before the turbo, Because if you haven't noticed that the factory EGT it on the uppipe as well.
This is from the Autometer install instructions and I Quote: "For Turbo engines, install the probe 1-2 inches from the turbo exhaust inlet." It says that on the very first line in the probe install.
Then you just follow your instructions as they say.

It's not like the whole subaru and DSM community are drilling and tapping the Exhaust manifold a few inches from the block. Do a search.. Theres an idea..
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Old 02-17-2004, 03:02 PM   #8
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Old 02-17-2004, 03:47 PM   #9
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Mine is on the casting flat on the header, near the famous #4 cylinder. I show 8-900 degrees F. @ idle, 100 degrees @ 65, and
1400 @ 75-85 mph.
That is supposed to be normal temps.
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Old 02-17-2004, 03:49 PM   #10
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Mine is on the casting flat on the header, near the famous #4 cylinder. I show 800-900 degrees F. @ idle, 1100 degrees @ 65, and
1400 @ 75-85 mph.
That is supposed to be normal temps.
Please note changes.
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Old 02-17-2004, 07:46 PM   #11
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^^^ There is an "EDIT" button on the bottom right hand corner.

Your temps are about average.
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Old 02-18-2004, 03:21 PM   #12
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I myself purchused a GReddy EGT (with GReddy probe). The autometer probes are known for being slow.


If you absoloutly must use an Autometer guage, use team rip's probe, it can be had for ~35$ @ www.teamrip.com. Its service life is quoted at ~15,000mi and is hands down the fastest probe you can buy.


Since you're using an EGT to tune off of, or as a warning guage, it is best to use the quickest and most accurate probe available. Otherwise the guage isn't much more then bling.
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Old 02-20-2004, 02:03 PM   #13
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Westach makes good very fast acting probes as well. They are fairly small in size, this partly the reason they respond so well.

Westach makes alot of instrumentation and sensors for small aircraft... thus accuracy and reliability are a must.

You barely touch the gas and the needle will swing a couple hundred degrees...

http://www.westach.com/

I use their clamp style EGT probe:



Extremely easy to install with only a drill and a bit. Mine never leaked either.

def
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Old 02-20-2004, 02:14 PM   #14
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do you guys remove the maniforld to do the probe install or just drill it on the car and not worry about the few metal shavings in your exhaust that are now heading for the turbo?
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Old 02-20-2004, 02:21 PM   #15
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what's the part # for the probe you're using dug-e-fresh? The part# in the picture's name isn't listed on their price list.
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Old 02-20-2004, 02:41 PM   #16
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I'll see if I can find out...

As for drilling, you can do that without pulling the manifold off the car, just have the car running.

As you are breaking through the pieces are blown out by the exhaust, especially if you drill straight up. Works like a charm.

def
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Old 02-20-2004, 02:56 PM   #17
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Quote:
Originally posted by Terbeauwrx
That is not what My directions said. Maybe for a non-turbo car that is where you would place it, but for a turbo car it says to place it before the turbo, Because if you haven't noticed that the factory EGT it on the uppipe as well.
This is from the Autometer install instructions and I Quote: "For Turbo engines, install the probe 1-2 inches from the turbo exhaust inlet." It says that on the very first line in the probe install.
OK....the reason it says "For Turbo engines, install the probe 1-2 inches from the turbo exhaust inlet." is because MOST turbo's engines have the damn turbo on or very close to the manifold....NOT at the end of a long, seperated manifold and 14" up-pipe. Our cars are NOT the average turbo application. Put it in the manifold, near the head where it belongs.

Next....the Autometer probes are great if you get the right one.
I have the 5249 and it is the correrct one for a turbo and it is supposed to be 'slow'....My EGT gauge needle moves within one second of the time my car starts and moves in(almost) direct response to the throttle....izat too slo??? NO, not to me.
10+k miles and no problems.

And last....Only a fool would drill the manifold on the car and risk having those HARD, HARD cast iron drill chips eat their turbine wheel. It only takes a couple minutes to take the manifold off, just do it.

My 2
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Old 02-20-2004, 02:57 PM   #18
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http://www.frostalarm.com/cat/p34.html

You can get the probe with varying lengths of lead, clamp size and probe depth.

I believe I went with 712-48DWK.

def
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Old 02-20-2004, 03:02 PM   #19
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Quote:
Only a fool would drill the manifold on the car and risk having those HARD, HARD cast iron drill chips eat their turbine wheel.
I guess I was a fool... although my car on stock turbo, after installing this probe went 13.097 @ 103.11... not bad for an ate up turbine.

def
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Old 02-20-2004, 03:08 PM   #20
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I've drilled 3 holes in my manifold for different EGT mount locations, without removing it. Just stick a small magnet in the hole, and the shavings will come right out.
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Old 02-20-2004, 03:13 PM   #21
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ah...now to find a magnet that size/shape.

thanks
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Old 02-20-2004, 03:37 PM   #22
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The design of a drillbit is to pull material out of a hole....

then you have gravity working for you if you drill straight up....

and lastly, if the car is running the very moment the tiniest hole makes its way through the manifold, exhaust will be pushing anything near that hole out and away...

Its no more dangerous than running around with a full atmospheric BOV... about the only one that has any sort of filter is the Blitz DD.

Point being... at the moment the valve opens the force pushing outward virtually eliminates ANY chance of anything getting in. Same goes with drilling the manifold...

I'd put money on it that you'd get no better results removing the manifold...

def
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Old 02-20-2004, 03:47 PM   #23
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FWIW i just called turboxs and mark suggested placing the probe a few inches from the collector where the headers meet the uppipe. He said rather than guessing which cylinder is hotter they get more reliable readings from there.

Last edited by SleeperWRX; 02-20-2004 at 03:54 PM.
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Old 02-20-2004, 04:19 PM   #24
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My point is that only a fool would do it if taking the manifold off is so quick and seay.....IMO, it's all the little things that get done right that don't cause other problems down the line that get the job done best.

Drilling a cast iron manifold, on the car....upstream of the turbo, is a very foolish thing to do, precautions or no. And I won't do it.
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Old 02-20-2004, 04:43 PM   #25
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i dunno...

from all i've read, i certainly don't think doug is a fool.

i took mine off, but i also wrapped and coated the manifold at the same time, so it was worth it.

ken
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