Erik@MIL.SPEC

iTrader: (94)

I am not trying to get in the middle of anything here, but if there is one thing Bryan doesn't have any shortage of it's data. He datalogs everything whether it's on the dyno or on the street.

TTP Engineering

iTrader: (465)

One of us has actually provided the data to the forum to back up our keystrokes.

Thanks for your input.

GST Motorsports

iTrader: (8)

It's been seen by almost all that switch to E85 and have a EGT. It's not really open for debate and not really worth my time to debate it as I know it from using E85 on a bunch of cars in motorsports use on track, strip and street.

I'm not in this to measure dicks.

TTP Engineering

iTrader: (465)

Jerry is a friend of mine and we have spoken at length in person about his car.



-50*C from probe position + 850*C = 900*C @ close to the head @ 12.5 AFR.

RoadSpike

iTrader: (5)

priceless comment if you were in my office i'd high five you for that

8thWonder

iTrader: (18)

I know right. This is entertaining to say the least!

Tractionlimit

iTrader: (12)

OK, so I know this has been discussed, but hypothetically, if I accidentally filled it with E70, I'd see my WOT AFR drop from low 12s where it is now to ~10s? I'm assuming there would be no other immediate indication without a knock light? Thanks.

GST Motorsports

iTrader: (8)

Wouldn't drop that drastically but yes you would see it richen up.

From E8X to E5X would do about a two point drop and I have seen it happen.

tkklemann

iTrader: (6)

You guys need to stop buying all of those SERIOUSLY overpriced EGT probes. The second you tag an EGT probe as "Aftermarket Automotive" use or something of the similar, the price goes WAYYYY up.

www.omega.com is where I get all my EGT probes from, and most gage companies get theirs from as well.

You need an exposed tipped probe to get the fastest reading EGT's as possible. A grounded probe is the second best option, and slightly longer lasting than an exposed tip.

I picked up a K-Type TJ36 probe with 24" Lead built custom to my specification for $44.

Try ordering an EGT probe from anywhere for that price.

EDIT: Sorry for the rant post, I was just tired of buying high priced probes and went on to find who was actually making everybody elses probes...

TTP Engineering

iTrader: (465)

I see nothing from that site remotely representing the Zeitronix EGT.

From looking real quick the minimum probe length appears to be 6" long.

If you want to install one in your 7" exhaust pipe on your tractor trailer it might be a good deal.

0xDEAD

iTrader: (3)

Unless you are measuring EGT's on each cylinder simultaneously you are wasting your time. All a single EGT probe is good for is roughly seeing how the tune on the motor is compared to how it was last time you raced it. Even worse is that most people don't know what heat outside the motor has to do with heat in the motor.

Summary: Single EGT probes are so 1996. Individual cylinder EGT probes with the knowledge and datalogging equipment to use it is so modern day racing industry. Especially useful for manifold and cylinder head testing, think about it.

mrfred

iTrader: (50)

tkklemann is correct. Several of the probes on the Omega website are well suited for EGT measurement. What you are not seeing is how the probes attach to a fitting on the manifold. The TJ36 is a metal sheathed thermocouple that is easily gripped using Swagelok fittings. I use them all the time at work. The distance that the probe tip is inserted into the exhaust pipe is completely adjustable from 0" past the fitting on the manifold to whatever distance you want. The sheath on the 1/16" diameter probed has very low thermal mass to make for a very fast acting probe in an exhaust gas environment. Under WOT conditions, it would react to a significant change in temperature (say more than 100C) within 0.05 seconds if not faster. Its easily as fast as the probe that you showed. The TJ36-CAXL-116E-12 would work very nicely, and the nice thing about using it with a Swagelok fitting is that the pipe fitting does not have to be unscrewed for probe replacement.

94AWDcoupe

iTrader: (125)

The probe on left is autometer probe. about as useless as you can get, very slow. The middle probe is what comes with all gauges that I have seen, HKS, Greddy, Apexi and the like all use this type probe. Performance is acceptable but doesnt compare to the probe on the right. Once you use an exposed junction probe you wont want to use anything else. They are fast, very fast.

While I was calling the probes I use TRE fast acting probes I am not exactly sure what I have been using. I purchased three probes ten years ago that where sold to me as TRE probes. Last month I was getting ready to order some new ones and when I contacted TRE they said they sell the Zeitronics probes. I remember paying around 35-40 a piece for these probes so when I asked him about the price increase he said thats the probe they have always sold. What I believe now is the guy I got the probes from bought them from Omega and sold them to me as TRE probes.

The way probes work is they measure voltage difference between junction of two wires made of dissimilar materials. There are three types, grounded, ungrounded, and exposed. Grounded is where the metals are touching the sheath on the inside so they are faster than the ungrounded type. The exposed is just that. It is exposed directly to the heat, no sheath in the way that has to heat first.

I believe the correct part number is TC-K-1/8NPT-E-72

GST Motorsports

iTrader: (8)

Yup can't wait to see the data from the 4 probes in our shop car.

TTP Engineering

iTrader: (465)

Unfortunately the exposed probe has a short lifespan of about 6-12 months which is why Zeitronix moved to a fully shielded probe.

I still do not see any probes on that site representing a Zeitronix unit.