What are the ECU options for the V6?

[timot_one]

I just hope the aftermarket industry sees that there is a market for a J Series tuning option that is greater than what is currently available. That's the one thing that would convince me to build a J to swap into an EK or DC2.

[mschumacher]

Paul, if you can get the Series 2 EMS to be compatible with this engine, that would be great too.

How forthcoming are they about this?

[NVA-AV6]

I just hope the aftermarket industry sees that there is a market for a J Series tuning option that is greater than what is currently available. That's the one thing that would convince me to build a J to swap into an EK or DC2.

I have been waiting for 5 years now. I wish people would see that there is nothing else out there that can touch the Js power to weight ratio.......

[Fanitron]

I have zero knowledge in the ECU department but this thread has been going on in V6P and I thought you guys might like to take a look at it (if you haven't already) to see if it's feasible or worthwhile. The guy working on it has already posted some maps of early tuning, but obviously I have no clue what I'm looking at 

http://v6performance.net/forums/7g-performance-discussion/215581-reasonably-priced-piggyback-feeler-5.html#post2007436

[NVA-AV6]

Without knowing more details about what he is connecting to and controlling I can't say yet but I am watching it as it does show promise.

[timot_one]

I just hope the aftermarket industry sees that there is a market for a J Series tuning option that is greater than what is currently available. That's the one thing that would convince me to build a J to swap into an EK or DC2.

I have been waiting for 5 years now. I wish people would see that there is nothing else out there that can touch the Js power to weight ratio.......

I'm going to start looking for a shell.  Hopefully there will be a good tuning option by the time I'm ready to fire up the J Swap in it.

[cna]

looks promising j series motors have potential

[NVA-AV6]

Case in point, a J36 in a 03 CLS-MT with a 80mm tb untuned. He has always used the same land sea dyno to track his mods and gains including a baseline that was right in line with factory specs. His last run put his car at 316WHP and 289WTQ. Now lets add 15% to translate to crank HP/TQ, So we have 363CHP and 332CTQ. That means that a built J can achieve 100HP per liter and the part I really like 1HP per LB of weight since a fully dressed J weighs in at 350ish lbs..........

[Fanitron]

^

[mschumacher]

Is the 15% transmission loss measured by putting the engine on an engine dyno?

We've had some transmissions that caused about 25% loss, though not the J series transmissions. The engine wasn't put on an engine dyno but certain dynos can measure transmission loss after the test is done and the wheels are allowed to coast on the roller.

If you account for 20% transmission loss, that figure would be even larger.

The sad thing is the lack of good tunes since there's no support for it. We once picked up about 40hp in a day's work of tuning the ECU. Admittedly this was a D15 Honda engine, but we went from 142whp to 183 whp in a matter of hours. That was a gain of 28% just with a tune. Now admittedly, that was a freak engine and the initial tune was conservative, but I'd expect atleast another 20-25 whp to be freed up with a good street tune, and atleast 30+ whp if tuned on a dyno.

[NVA-AV6]

15% is about standard for a MT, 25% is about standard for a AT.

[mschumacher]

15% is about standard for a MT, 25% is about standard for a AT.

That's what we thought too. It was an MT Honda tranny btw. You'd be surprised at the transmission losses on some cars. My point being that it's pointless to take transmission losses into account. Variances like stiffer pressure plates, clutch plate material, the state of the flywheel are just a few things that can increase or decrease transmission losses.

Since that day, we stopped trying to get a hypothetical hp/tq number at the engine and stuck to comparing numbers at the wheels.

[3.Slow6MT]

Paul, wasn't that specific J36 running rich as a pig up top as well?

And the 8G ECU is reflashable...how 'easily' can this be wired and fitted? Thank God the 6MT didn't come with the VCM or we'd be in trouble...other than that?

[NVA-AV6]

Yes it was, about 11:1 AFR which means leaving a good 20WHP on the table.....

I looked at the wiring differences a while back and I don't remember there being any "wierd" siganls that have to be worked out, just very different connectors so two different extension harnesses (about $330 worth) would have to be purchased to make a conversion harness.