Hks F-con V Pro - E85 Flex Fuel Setup?

[Stixbnr32]

Hey guys,

Is it possible to setup a flex fuel setup with the HKS F-con V Pro ECU?

I know there are other requirements for this but that is a big sticking point.

Thanks

[GTSBoy]

I'd be willing to bet, even without looking into it, that the answer would be a big fat no.

[scotty nm35]

Realistically you can setup flex fuel on any ecu with a spare 0-5v input, but as it's another sensor you are relying on and your engine may well melt if it plays up. Why not just go with two tunes and switch between them using the front panel or a laptop?

A straight ethanol tune is the answer to your problems, as once you go e85 you definitely won't want to put 98 back in it and drop the boost.

[Stixbnr32]

I do not like the fact that I would have to drain the tank to switch. But suppose not the end of the world.

[Blackkers]

Draining the tank isn't that hard. Flick the fuel pump on and catch it before it gets to the fuel rail

[Ben C34]

Scotty's post is a bit misleading. Of course the ecu would need a spare input. But to assume any ecu with a spare input can interpolate tunes between e85 and petrol is not correct.

[scotty nm35]

Depends how well you want it to work.

Why would you need to drain the tank? A little petrol in the mix is fine, no need to be anal about it. (other than when you are tuning the engine)

[Stixbnr32]

Ah ok did not know that. I will have a chat to the tuner and see what he reckons.

Thanks guys

[GTSBoy]

Be aware that Scotty's "solution" is not flex. It is just 2 tunes and you swap manually somehow. The assumption that the HKS ECU could actually do flex, even if it had a spare input is the point in question. Scotty's solution bypasses the question by rendering it irrelevant.....that is unless you actually do want/need flex.

[scotty nm35]

No, the zietronics device runs a 0-5V output which most ecu's can use to adjust fuel and or timing mixtures. Why would it be a manual change over? I was looking into getting the Emanage Ultimate to run off the flex sensor but no-one seems to want to tune them anymore. Sure it's more agricultural than the Haltech, but not much worse than most of the "flex" capable ecu's on the market from what I have seen.

The only "flex" ecu is the Elite, as it is the only aftermarket ecu that actually gives you any adjustment of maps for each ethanol percentage correct?

[GTSBoy]

The only "flex" ecu is the Elite, as it is the only aftermarket ecu that actually gives you any adjustment of maps for each ethanol percentage correct?

Well, that's pretty much what I meant. If the ECU is not properly interpolating with varying ethanol % then I'm not considering it to be flex.

FWIW, Nistune can do it now. Properly.

My main point going back to my first reply is that I would just expect that those Jap glorified strap-on dildo ECUs to not offer proper flex, seeing as most other aftermarket ECUs don't.

[Kinkstaah]

Scotty, the PS version and most of the plugin ECU's (the R34 plugin does it) of haltech stuff will all do proper flex.

Its not too complicated, as you said, it all goes off a 0-5v sensor, then has a separate map that it interpolates from for correction on timing, fuel, boost.

I imagine this is also what Nistune does, as well as anything else that is flex capable.

[KiwiRS4T]

I don't think any version of the F-Con can do flex fuel but all Link and Vipec ecus can

[scotty nm35]

Scotty, the PS version and most of the plugin ECU's (the R34 plugin does it) of haltech stuff will all do proper flex.

Its not too complicated, as you said, it all goes off a 0-5v sensor, then has a separate map that it interpolates from for correction on timing, fuel, boost.

I imagine this is also what Nistune does, as well as anything else that is flex capable.

This is true, but there are limitations on most flex software due to that interpolation, which the elite doesn't have. I am seriously looking at the new 1500 elite for the evo for this reason, if it has the same adjustability with regards to ethanol percentage.

The Fcon Vpro has the ability to run a flex setup i'm sure, but no support to get it implemented. As far as strap-on dildo's go, it's still by far the best option available for the VQ25det.

[Nismo 3.2ish]

My ECU went pop and just had a Haltech R34GTR Pro installed and thought I would also have Haltech Flex Fuel Sensor. They say it will do 0-100% E85

Has anyone used them together ?

[Stixbnr32]

Well thats part of the reason I am asking - I was watching the Motive DVD GTR build and they have it running with the haltech. That and link looks to be the biz. Should have gone Link.

[Nismo 3.2ish]

When I do the run in and the final tune I will see how it goes, trouble is they do not sell E85 here yet

[Kinkstaah]

My ECU went pop and just had a Haltech R34GTR Pro installed and thought I would also have Haltech Flex Fuel Sensor. They say it will do 0-100% E85

Has anyone used them together ?

I have the haltech PS2000, but the PS1000, Elite (I think?) and the Skyline plug-in ECU's all use the same system, tables, method of correcting for ethanol, content.

Practically its quite easy to do.

However it could be time consuming. I am happy I have a wideband and can tinker with correction maps just incase 32% petrol (or whatever) decides it'd rather idle at 13.4 AFR instead of 14.7.

I could see most tunes being 'slightly' out, but mainly only because it requires time to get *perfect*.

Most tuners will tune on your most common fuel, then make some approximate (i.e, very safe) corrections for alternate fuels. Enough for spirited driving, but also enough that you'd want to gravitate toward your 'base' fuel as much as feasible.

[infamous_t]

I don't think any version of the F-Con can do flex fuel but all Link and Vipec ecus can

+1, just picked up my flex fuel tuned Link g4+ yesterday

Even nistune can be flex fuel tuned these days with an additional board.

[Nismo 3.2ish]

I have the haltech PS2000, but the PS1000, Elite (I think?) and the Skyline plug-in ECU's all use the same system, tables, method of correcting for ethanol, content.

Practically its quite easy to do.

However it could be time consuming. I am happy I have a wideband and can tinker with correction maps just incase 32% petrol (or whatever) decides it'd rather idle at 13.4 AFR instead of 14.7.

I could see most tunes being 'slightly' out, but mainly only because it requires time to get *perfect*.

Most tuners will tune on your most common fuel, then make some approximate (i.e, very safe) corrections for alternate fuels. Enough for spirited driving, but also enough that you'd want to gravitate toward your 'base' fuel as much as feasible.

Thanks, I just drove the car back from Sydney today after my 3.2 build, different car

It will be tuned in when I get the final tune, but my main fuel will be 98 pump, but I thought why not get it done while I was doing so much. I wanted to make it a pretty well balanced car and able to use E85 should I ever decide to