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Old 09-28-2012, 12:34 PM   #1
pk2
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I wouldn't try to put the egt in the manifold (if it's just the probe sort). I doubt there will be any appreciable difference in the reading a few inches down the pipe. It's a little relative anyway, you'll have to do some mental calibration once you get the Porsches actual temp specs. It will help to get the probe tip centered in the pipe as best you can though.

I put mine a couple inches behind it in the pipe. If it not late, you might trade yours in for the kind I have. It just took a few minuets under the car. There like a hose clamp. if you looked at the end it's like a "Q" where the leg of the "Q" is the probe and circle of the "Q" is the hose clamp that clamps it on and seals it up. Drill a hole in the pipe, tighten down the clamp, run the wires up, done. (If yours is threaded , you can buy a threaded stainless bung (ebay) and have a muffler shop weld it on to the pipe.)


Ya I forget which, MAF (mass air flow) or MAP (mass air press.) are on these, doesn't matter though, either one is just putting out 0-5v signal that reflects how much air your sucking in to be mixed with the fuel. It definitely won't hurt SMT6, and for data logging, it ...none invasive.

Good work, PK
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Old 10-03-2012, 06:50 AM   #2
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I have the EGT probe in and will be making an 8 hr trip to Tennessee this Friday so I'll be able to get some readings and normal running temperature. I did end up putting it in the manifold as that was the most common spot in all the how-to youtube videos I saw. Plus, its easily accessible from below but should be safe.

Here's some pics. I used a hose clamp to help keep it in place, although the screw-in plug did seem to hold it so its just a precaution. Notice the drill bit tip I melted and the tap I destroyed. The dewault bit, however, did the business.



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Old 10-03-2012, 09:10 PM   #3
pk2
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Can't go wrong with that. Good job. I put mine on a little after the fact, I already felt reasonably good about the kit.

Your trips sounds perfect for logging some data. Around here mine never changed that much, there was idle and Highway-speed/hard acceleration (of course about 35% of the time somewhere in between). Never went over the same highway-speed/hard acceleration high mark.

Here's an idea, sounds like your going to be pretty scientific. Might try some good 100 oct. Theoretically, higher octane burns cooler (octane is a more complicated than it seems though). There's also stuff like toluene and xylene that have very high octane ratings you can add to your fuel, if you dare. I tried them all for awhile but saw no difference from the 91 oct, the best we get around here. Be interesting if you saw the same.

Good luck, PK
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Last edited by pk2; 10-03-2012 at 09:15 PM.
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Old 10-09-2012, 01:12 PM   #4
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I can see if I can find some 100 octanne. Sounds like a worthwhile experiment. Unfortunately my gauge doesn't log data. Theoretically I can put the voltage input into an input for a OBD program and plot it vs RPM but I haven't got there yet. I can say that mine has a very fast response to load. I'm quite impressed. For example, at 75mph on a flat interstate I get about 1120F. If I hit a hit a hill at the same speed I can see it immediately respond by slightly higher temps like 1200 ish. Same RPM but greater load. The highest I managed to get was about 1240F on the interstate through Kentucky. Higher RPM due to speed (I'm not putting the number on here - ask me in a private message. Needless to say I'm a new fan off I-75 through south Kentucky and Tennessee) but not a particular high RPM. I'm sure I can see hotter temps for high revs but I was only looking at it when I was doing a constant speed.
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Old 10-09-2012, 06:49 PM   #5
pk2
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Fun trip I bet.

100 octane is just unleaded race fuel. Your in the south, nascar land, I just Googled and its allover the place down there (but $$). Try BP. I will say though, there's 100 oct and 100 oct. But try it, they all theoretically should cool things down.

I'll be curious just to see your highs and lows and under what circumstances you got them.

Good luck, PK
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Last edited by pk2; 10-09-2012 at 06:56 PM.
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