996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

can the 996 ecu support a flex fuel setup?

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Old Feb 4, 2015 | 06:00 PM
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Originally Posted by BLKMGK
For the EMS itself you aren't talking tons more than what your buddies are running with the Holley. HOWEVER, this is an expensive motor and I think it's worth the money to have someone experienced install it and give it an initial tune. Garth and some others have this down pat and Garth will be the one setting up and installing my system - I purchased ProEFI from him. The E85 sensor isn't super expensive either. When you begin adding on things like intercoolers, intakes, and other toys it begins to add up.

Price out what an ECU flash costs and then figure on potentially needing it flashed a few more times as you mod the car. Compute the value of having safeties the factory EMS doesn't and a traction control that's geared for straight line acceleration vs being a nanny and saving your *** - know that the save your *** nanny is still available if you want it. Also, when you turn it off with a stock ECU my understanding is that it can turn itself back on - not so with a ProEFI or other standalone. Factor in an accurate gas gauge, what should be accurate MPG readings, the ability to tweak the speedo to read correctly for different tire combos, the ability to run doodads like methanol injection, staged nitrous, shift and warning lights, and whatever else you can dream up with the available I/O and you can begin to see the value - be it Corvette or 996. Oh and flex fuel - you can switch up fuels however you want and the ECU interpolates for the available octane. This can mean a great big HP bump if you're octane limited - and most of us are. I SO want to get a flex fuel emblem for the *** end of my car and start using those special fuel spaces at work! Anyway, you get the idea - it's not as bad a value proposition as you might think if you intend to mod the car very much, I look at it as an investment.

As for the 112, ITGuy is the only one I know of that has one unless 32Krazy has one? I know it's their newest box but it's undergoing some development and has apparently got a few teething issues. ITguy can elaborate on that. Either box is capable, I believe the 128 has more I/O which is very valuable to me. Syveccs and AEM are also BOTH very capable boxes and I expect we'll be seeing some cars running AEM here pretty soon.
Dscoff has the 112 installed by undercover in his car. 675rwhp on 93 772 on e85!! i have the 128 as the 112 wasn't built when i leaped in with both feet. one only has to look at the logs these computers can spit out and see millisecond injector timing and the list goes on and on. a standard graph on mine has 80 + parameters all being logged at the same time in fractions of a second. its a huge pile of lines until i go thru and see what i need. my computer will be returning next week. ill get you some graphs to look at blkmgk
 
Old Feb 4, 2015 | 06:08 PM
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I believe you'll find DSCOFF uses a 128 as well. I think you might have sent me some logs actually, I'll have to look. I've seen what the old AEM could do and these are FAR more capable so I truly look forward to looking over the data and tweaking once this is done. My car is trapped in stereo jail, I have a fuel system coming, and I'm deciding on intercoolers. I'm a Y-pipe and a money tree away from getting it up to Garth
 
Old Feb 4, 2015 | 06:36 PM
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Originally Posted by BLKMGK
I believe you'll find DSCOFF uses a 128 as well. I think you might have sent me some logs actually, I'll have to look. I've seen what the old AEM could do and these are FAR more capable so I truly look forward to looking over the data and tweaking once this is done. My car is trapped in stereo jail, I have a fuel system coming, and I'm deciding on intercoolers. I'm a Y-pipe and a money tree away from getting it up to Garth
my mistake. i know he talked to me about the 112 didn't realize he went full on 128.
i was going to send you a short video if the programs as they are running to show how much data is collected and how huge these files are with live data

let garth build the y pipe its the easist way and may as well let him build the i/c as well or i can send you the pdf files to build your own 4.5" i/c(thats what i did)

powerball is 370 million if you win ill let you build mine as well!
 
Old Feb 4, 2015 | 08:33 PM
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I sold my 997tt to a local client, with all the bolt on mods and vtg compressor upgrades, pump and race gas etc...
He wanted more power 6 months later, did a E85 conversion with another tuner( no one mentioned here btw), 2 weeks later blew it up after leaving the gas station.
just my .02 cents,
markski
 
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Old Feb 4, 2015 | 10:25 PM
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IMO you really need to run a sensor. The mixing of fuels, the unreliability of the station's supply, and human nature just add up to a disaster waiting if you try and do some sort of switching of maps.

It should be added that if you want to run E85 in the 996 you're going to need to add a fuel system of some sort to the list so it's a bit more than what I mentioned above...
 
Old Feb 4, 2015 | 10:46 PM
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Originally Posted by 32krazy!
my mistake. i know he talked to me about the 112 didn't realize he went full on 128.
i was going to send you a short video if the programs as they are running to show how much data is collected and how huge these files are with live data

let garth build the y pipe its the easist way and may as well let him build the i/c as well or i can send you the pdf files to build your own 4.5" i/c(thats what i did)

powerball is 370 million if you win ill let you build mine as well!
Not to get too far off topic, I did go with the 128 in the final hour due to some teething issues with the 112
 
Old Feb 5, 2015 | 09:46 AM
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Originally Posted by BLKMGK
IMO you really need to run a sensor. The mixing of fuels, the unreliability of the station's supply, and human nature just add up to a disaster waiting if you try and do some sort of switching of maps.

It should be added that if you want to run E85 in the 996 you're going to need to add a fuel system of some sort to the list so it's a bit more than what I mentioned above...
That's why I was curious of the flex fuel. The 85 around here at best is 70. I've even seen as low as 30. Should almost be illegal. That's why I don't want to run a straight 85 tune.
 
Old Feb 5, 2015 | 11:39 AM
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Originally Posted by MARKSKI@911tuning
He wanted more power 6 months later, did a E85 conversion with another tuner( no one mentioned here btw), 2 weeks later blew it up after leaving the gas station.
just my .02 cents,
markski
Any reason what caused the failure?? Bad tune, internals failed, etc? There's nothing wrong with using E85 as a fuel in itself, it's just making sure you're properly set up -- Plenty of fueling support, a good tune, etc.

Originally Posted by BLKMGK
IMO you really need to run a sensor. The mixing of fuels, the unreliability of the station's supply, and human nature just add up to a disaster waiting if you try and do some sort of switching of maps.
Originally Posted by VGLNTE1
That's why I was curious of the flex fuel. The 85 around here at best is 70. I've even seen as low as 30. Should almost be illegal. That's why I don't want to run a straight 85 tune.
99% of the cars on here are street cars -- This makes a standalone EMS ideal, where it can automatically compensate for the ethanol content, regardless what you pump/pour into the tank. If people flash tune, they REALLY should buy vendor E85 (VP Fuel/Rockett Brand/etc.), and either 1) test the fuel's ethanol content, and/or 2) tune conservatively.

Legally, E85 from a pump should not fall below 70%, according to the Govt required legal disclaimer




And others have said this, no one should "trust" a gas station to have quality E85.
 
Old Feb 5, 2015 | 12:05 PM
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Originally Posted by Mit_Boost
Any reason what caused the failure?? Bad tune, internals failed, etc? There's nothing wrong with using E85 as a fuel in itself, it's just making sure you're properly set up -- Plenty of fueling support, a good tune, etc.
I agree, but it was not my tuning nor set up on E85... I have no idea what happened... I just know what he told me... went kaboom right after the fill up getting on the highway...
My point is: its great when it works and one better be sure its done right... this was a 997 so they only run a 5 bar with 80 lbs injectors on vtg turbos...
I had the car for 8 months and ran pump and race gas,.. not a single hick up... had he stayed that way and just used 100 octane when needed he would not be doing a $30K build..
 
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Old Feb 5, 2015 | 12:14 PM
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Originally Posted by MARKSKI@911tuning
I agree, but it was not my tuning nor set up on E85... I have no idea what happened... I just know what he told me... went kaboom right after the fill up getting on the highway...
My point is: its great when it works and one better be sure its done right... this was a 997 so they only run a 5 bar with 80 lbs injectors on vtg turbos...
I had the car for 8 months and ran pump and race gas,.. not a single hick up... had he stayed that way and just used 100 octane when needed he would not be doing a $30K build..
Barf
 
Old Feb 5, 2015 | 05:31 PM
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Originally Posted by Mit_Boost




99% of the cars on here are street cars -- This makes a standalone EMS ideal, where it can automatically compensate for the ethanol content, regardless what you pump/pour into the tank. If people flash tune, they REALLY should buy vendor E85 (VP Fuel/Rockett Brand/etc.), and either 1) test the fuel's ethanol content, and/or 2) tune conservatively.

Legally, E85 from a pump should not fall below 70%, according to the Govt required legal disclaimer




And others have said this, no one should "trust" a gas station to have quality E85.
in my town i have seen e85 at the pump thats e50. i have purchased c85 race fuel directly from vp racing 3 times and haven't gotten above e77 yet. flex fuel analyzer is the only way i would run ethanol
 
Old Feb 5, 2015 | 06:23 PM
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I only read a few posts so I apologize. But..... There is no way ethanol blew an engine. And if so I would love to hear how it blew up..... What actually failed? A piston?..... Rod?......

I have done several multi fuel maps. And when I do a Ethanol tune there is no way that it could possibly hurt a motor. Regardless of ethanol content, if its not within reasonable percentage regardless of which direction the tune will only be safer, just not optimal.

Garth
 
Old Feb 5, 2015 | 10:31 PM
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Originally Posted by Undercover Tuning
I only read a few posts so I apologize. But..... There is no way ethanol blew an engine. And if so I would love to hear how it blew up..... What actually failed? A piston?..... Rod?......

I have done several multi fuel maps. And when I do a Ethanol tune there is no way that it could possibly hurt a motor. Regardless of ethanol content, if its not within reasonable percentage regardless of which direction the tune will only be safer, just not optimal.

Garth

So if your car is tuned on 110 and put 87 in it and hammer it, it will never blow up?
 
Old Feb 6, 2015 | 02:20 AM
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Originally Posted by VGLNTE1
So if your car is tuned on 110 and put 87 in it and hammer it, it will never blow up?
thats gasoline not ethanol
 
Old Feb 6, 2015 | 02:55 AM
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I know of many inexperienced tuners who will keep adding timing past mbt because ethanol will not knock the same way pump gas does. So combine that with a ****ty ethanol content and you have some pretty bad things happening which lead to either cracked pistons/bent rods/listed heads.
 


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