Thread: Most Accurate E85 Tester
11-12-2013, 09:35 AM #1
Most Accurate E85 Tester
What's a more accurate E85 tester than Quick Fuel's E85 Tester?
Quick Fuel's E85 Tester has worked for me the handful of time's I've used it. With that said, I might just be crazy with something I noticed recently.
I filled up with E85 a few weeks ago, and it was E80 per the tester and after about 20 minutes of waiting. While cleaning out my garage over the weekend, I found the test tube in a box that I forgot about. I looked at the percentage and it was now around E73.
I found the tube on it's side, so could it just be a case of some of it spilling? Could it be that I didn't screw on the cap tight enough and x evaporated? Either way, I'm curious if anyone else is using another E85 tester.
11-12-2013, 09:41 AM #2
11-12-2013, 09:45 AM #3
11-12-2013, 09:52 AM #42011 E90 M3 \ Melbourne Rot Metallic
11-12-2013, 11:17 AM #5
11-12-2013, 11:19 AM #6
I have one of these sititng in my garage if anyone wants it. Shoot me an offer.2011 335is DCT, moving to Italy, looking for new car friends
11-12-2013, 11:28 AM #7
11-12-2013, 11:30 AM #8
11-12-2013, 12:05 PM #92011 E90 M3 \ Melbourne Rot Metallic
11-12-2013, 12:45 PM #10Member
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11-12-2013, 01:11 PM #11Eppur si muove.
11-12-2013, 01:30 PM #12
JC335xi, I don't see the specifications listed anymore, but about a year ago i was planning on going with this setup and IIRC, the VDO sensor was only accurate up to ~ 50 psi. The GM sensor is good to 145psi.2011 E90 M3 \ Melbourne Rot Metallic
11-12-2013, 02:02 PM #132008 135i - Cobb AP, JB4 G5 w/2Step&FSB, MS DP's, Berk street exhaust, AMS IC, VTT Inlets, UR Intake, ER CP w/Tial BOV, Spec 3+ & Steel FW, CDV delete, Quaife LSD, DSS Axles, M3 control arms, M3 rear SF bushings, M3 Trans bushings, SS brake lines. Pics
11-12-2013, 02:35 PM #142011 E90 M3 \ Melbourne Rot Metallic
11-12-2013, 02:50 PM #15
I've tried to locate specifications for any of the following GM part numbers (which are Continental/VDO parts) to no avail:
I don't think the pressure will affect the accuracy. The sensors measure the capacitance of the fuel to judge it's ethanol content:
The capacitance is dependent on the permittivity of the fuel, and the length and radius of the two electrodes. Pressure does not figure into the picture at all.
What the fuel pressure will do is potentially rupture a sensor not designed for it.
The most relevant piece of info I found is the 13577379 sensor is used in the Cadillac SRX which is equipped with GM's high feature LY7 3.6L V6 engine. This engine runs at a rail pressure of 60 psi.
The N54 low pressure is less than 80. So that's less than a 20psi difference. I doubt the sensor will burst at the slightly higher pressure. It's probably designed to fail at two or three times the rail pressure on the LY7.
This is great because the 13577379 sensor is 80 bucks. I plan on buying one of these and designing some electronics to be able to read the sensor. It should be significantly cheaper than the Zeitronix product (like around half for the sensor, cabling and electronics), especially considering they are charging $200 for a 80 dollar sensor with a sticker on it.Eppur si muove.
11-12-2013, 04:35 PM #16
@ajm8127, drr, not sure why i said only accurate to, i meant to say "only rated up to." Honestly with the plethora of the GM 12568450 or 12570260 sensors around, if i was going to go through with it i would just snatch one up from a junkyard. There is also a few on ebay for $150 bucks.2011 E90 M3 \ Melbourne Rot Metallic
11-12-2013, 04:47 PM #17
If you can score one at a junkyard that is great. Personally I prefer to buy one new and i think the newer VDO sensors will work fine. I guess we will see.
There is a flexible line between the fuel lines on the bottom of the car and the HPFP inlet. I was going to try and mount the sensor there. It almost looks like the stock fittings are the same type as the ethanol sensors. Not sure about size but I think Jegs and Summit both sell fittings which will work.
Once the actual ethanol content of the fuel in the tank is known, it should be pretty easy to add the correct concentration of E85 at the pump.Eppur si muove.
11-12-2013, 09:20 PM #18
Alright, so, I read through the feedback, and I really appreciate it. I'm one that doesn't care too much about paying a little bit more if it comes with everything needed. I believe they offer different ECA kits with different sensors, and the one(s) you all advised are available.
With their new ECA-2 Kit, I'm thinking about mounting the gauge in the ashtray pod, along with my HFS-4 gauge.
Am I correct in that the installation is basically connecting it to the return fuel line, and that's all? This would be somewhere under the car or in the engine bay?
My friend and I installed the inline Walbro 255 LPFP, and I was thinking about maybe tackling this ourselves again. (Doable?)
Edit: We don't have a return line?
11-12-2013, 09:23 PM #19
11-12-2013, 09:40 PM #20
11-12-2013, 10:53 PM #212011 E90 M3 \ Melbourne Rot Metallic