Guaging interest on a BETTER THAN JWT Q45 ECU.

[RobertsnewQ]

I'm working on the Y33 next. I'll see what I can find out.

I need to get an ECU connector from the junkyard before I can begin.

I THINK there is a daughterboard available - I'll know after I get the ECU and see what's in there.

[elwesso]

Robert cant you just pull the maps from car?? meaning you could find a 97 Q, ask to "test drive" it, and then work your evil magic...

[RobertsnewQ]

No, only if the car has the old grey consult connector. Newer OBD-II connectors use a different communications protocol (called Consult II by Nissan).

That's the hard part right now.

[DrewQ45]

Basically what we're getting here is we're not trying to rip anybody off.....

Also, like Robert said, the ECU program that most people get wll be slightly safer than the one I have... Please notify me if you want the more advanced program, but I only recommend this on cars with outstanding mainteance, with many new parts... The 7200 vs 7400 really isnt that big of a deal and I shift at 7200 most the time anyway... My ECU is about as maxxed out as one can get, the ECU most of you willbe recieving will be slightly less.....

Wess, I'd like to hear more about the agressive program. I understand that it will put more strain on the engine but how much more so? How much of a load will it be with normal everyday driving since most of us are not always flogging our cars. If I choose to just let it all hang out once in a blue moon and drive like an old lady for the most part, how bad can it be? What would be real nice is if we could somehow wire two chips in parallell one aggressive and one standard then control the mode with the flip of a switch. Wishful thinking? I'd love such a setup.

..Drew....

[elwesso]

it shouldnt be that bad, but potentially wiht my program, i could see knocking with only 91 octane available...

LIke I said, the lower load areas of the maps remain uneffected... As far as I understand it, it really isnt changed much below half throttle loads.....

Really theres no need for a switchable setup.....

I only spell my name with 1 "s" ..... despite my screen name.....

I just have concerns about people that live in places where it gets really really hot and only having 91 octane.

[DrewQ45]

I only spell my name with 1 "s" ..... despite my screen name.....

I just have concerns about people that live in places where it gets really really hot and only having 91 octane.

Sorry Wessssssss I'll be better with the name from here on.

Georgia = Gets hot + 91 Octane. Guess I'll be running with the less agressive version. Hey, can't you put 91 in your tank for a min and tell us how it runs?

...GOD I miss SUNOCO! "highest octane under the sun" (no such thing here in the south)

[zinkie13]

I can't believe you can only get 91 octane in some places. I can't even find a gas station that has anything less than 92. I refuse to put anything but 93 from BP in my car. If I'm in a bind, I'll get shell 93 or sunoco 94.

[3rd Q]

B

Wes,

I want the most aggressive ECU program possible for 93 octane fuel. My Q45 is almost ready to hit the road, just waiting for my Deatche Werks injectors to come in from cleaning and testing, plus my valve covers are still not back from the powdercoater in NY. As you know my engine is in top shape, every hose from top to bottom repleaced and engine is in STOUT condition. I am waiting for my BBK headers to show up also. Anyone have a spare ECU for sale with TCS ?

Blackbird,Call me at 312-933-0600, I've got a TCS ECU for you. I'd like to hook up in person once you get your engine together and see how it turned out- looks great so far! BTW, which Acura dealership are you at? I used to drive a Legend before I started with the Qs 10 years ago. Paul

[nuQ]

hey wes, i can get 93 anywhere around here and 94 isn't a problem either. i'm in for the upgrade,,,,since my Q isn't an everyday driver, have no problem sending my ECU off for the upgrade!!!

[chinaonnitrous]

I hate california 91.

[heywier427]

sign me up who do i send the ecu to i would like the aggressive formula!

[elwesso]

Group byu information is coming soon.....

The reason I post this before the fact so that people can start buying ECUs so they have them ready......

[Q45tech]

Pump labeled OCTANE is meaningless with a 32v performance engine as the tests were designed 30-40 years ago to evaluate how fuel behaved in 1970 low compression cars.

It is very doubtful that the stock ecu program even with current 93 US premium is seeing enough so called octane to function as designed on Japanese 1988 PREMIUM. Why the ever downward tweeking of ecu as the years progressed90>95

Almost every car we see now knocks on premium fuels, BG44k makes it go away for a few tankfuls but the dirty fuel just brings it back in 500-1500 miles.

QX56/Titan pickups are really bad even with low tune. Lexus is showing problems so you KNOW its the fuel.

[Q_SHIP]

So when can we see one of these for a Y33?

[elwesso]

Thanks for posting tech... As long as people dont see knocking or timing retard due to pinging, then i guess we're OK... Why its NECESSARY people have their knock sensors working.

QSHIP... I have no ETA on that, id expect a while..... ive been workin on the G50 ECU project for about 3 months.

[RobertsnewQ]

The base (no knock) timing map is LESS aggressive than JWTs in a couple of spots (mainly 2000 RPM and 4000 RPM at high loads), because the JWT map causes knocking on 91 octane at certain RPM/load points. Knocking means it will switch to the low octane maps and then you don't have much benefit.

However, I have INCREASED timing in some areas (cruise, throttle tip-in, high RPM) at the same time. The peak HP should be more than JWT, but some low-RPM torque spots will be flatter. The off-idle performance "snappiness" is AWESOME compared to stock, and much better than the std. JWT tune.

If you live in a 92/93 octane state, I raise most of the high-load timing up one or two points from the 91 octane map. The knock map is the same for both, so if there is a problem it will just revert to that. The knock map is slightly more aggressive than stock, but a good 1-2 points retarded from the no-knock timing map.

You should see the advance curves on a JDM modified ECU I have (I think it's Impul). It is AGRESSIVE!!!. The stock JDM map is actually pretty good as a modified map for us - it's conservative for their gas but slightly aggressive for ours!

The stock USDM timing maps are the same (actually they get MORE aggressive in the midrange!) from 1991-1994. 1990 is a special case, the ECUs had more aggressive no-knock timing (by 1-2 points) but more conservative knock timing. The fuel maps change somewhat, probably for emissions or fuel economy reasons, although the USDM fuel maps are richer than the JDM maps - I think it's because we have cats that have to be fed some unburnt fuel to live for 100,000 miles.

As for engine longevity, there are two factors.- higher RPM limit. This will stress your engine more IF you bounce off the limiter all the time, but if you do it once in a while it probably won't matter too much. I can leave it stock if you want.- The catalytic converters. Since I leaned out the high RPM/high load areas of the fuel maps, the cats won't get as much cooling from unburnt fuel at WOT. If you are planning on driving around at WOT all the time, again, the cats will fail sooner than Nissan intended. How soon is hard to say - if you've got over 100k on your original cats you're on borrowed time anyway.

I can do a map-switching thing with two different programs but there are two caveats:

- It will cost you $40 more (because I have to buy a board, and that's what it costs me to buy one w/shipping)

- You can only switch maps while the engine is NOT running. If you do it while the engine is running, it will cause the ECU to reset, and could cause a lean spot. Don't do it.

[elwesso]

Probably why the 90Q maybe were a little faster, since they were a little more advanced.

[Falkdesigns]

Octane isn't what it used to be, yet cars are making more power than EVER. 500 + hp is becoming common, ~300 is no big deal any more, cars get better mileage than before while producing less emissions, etc. Can't be that big of a deal, but hey, what do I know. I just know that my Q is quick off the line, fast on the fwy, smooth as butter and doesn't knock or make any other weird sound.

Robert, since I'm near you, can I get the first Y33 ecu to test out

[BlackBirdVQ]

3rd Q, I need to Email you bout the ECU but I can't- I don't know your E-mail. Shoot me a mail on [email protected]. We can set up a day we can meet up and you can check out the car. I want the ECU.

Robert- what bout a special ECU for us who wanna run 100 octane gas ? I wouldn't mind paying 40 bux extra for a HIGH octane program, whenever I ran NOS on my Max in the past I always ran 104 unleaded in it anyways. What I am saying is I would like a switching type ECU program with 2 or even 3 programs for diff days of gasoline or temps outside

[chinaonnitrous]

Thats exactly what I was thining. My Q is on its way out to be a weekend queen. Daily driver is comming back. I would definatly pay an extra 40+ bucks to be able to switch between a 91 to a 95~100 octane program for drag/road racing days. Race gas I can get is 100. Other than that, once again california sucks.

3rd Q, I need to Email you bout the ECU but I can't- I don't know your E-mail. Shoot me a mail on [email protected]. We can set up a day we can meet up and you can check out the car. I want the ECU.

Robert- what bout a special ECU for us who wanna run 100 octane gas ? I wouldn't mind paying 40 bux extra for a HIGH octane program, whenever I ran NOS on my Max in the past I always ran 104 unleaded in it anyways. What I am saying is I would like a switching type ECU program with 2 or even 3 programs for diff days of gasoline or temps outside

[RobertsnewQ]

Well, I'm working on a 4-map switcher but it's taking some time. I can do two-map switching without much difficulty, but the board would make it nicer.

[3Q Jay]

i know we've kinda moved to the group buy thread, but since the tech questions are here.....what about the vvt points? i've heard tribal stories about actives having more aggressive vvt, but don't know for sure. is it adjustable in the ecu?

[elwesso]

Yeah and we made it so it "kicks in" sooner.

[RobertsnewQ]

Yes, there are two VVT control points - OFF under acceleration, and ON under decelleration. In the stock ECU they're both set to 4600. It's the same in every bin that I have.

JWT sets it to 4500, I've set it to 4200. It doesn't seem to make much difference. If you have reground cams, it might help to play with the set point, but the stock setup is probably pretty good.

[Q45denver]

Probably why the 90Q maybe were a little faster, since they were a little more advanced.

That's probably the reason I never noticed much improvement when I installed the JWT on my 1990?

[elwesso]

I suppose its possible.. also the earlier JWT programs were not nearly as agressive..... Robert said that the one I gave him, a JWT in a 91 ECU or something, was just a little bit above stock, but the one in my 94 was really advanced compared to it.

Id say thats very plausible.

[Q45denver]

Wes or Robert:

I forgot to mention that I'm installing the updated 94-95 fuel injectors in my 1990 so you may want to reprogram it with the 1994 fuel map? Use you best judgement as to the octane rating as 91 octane is the highest that is readily available here in Denver. I'll try swapping my JWT ECU into my 1995 and visa versa sometime this week to see what happens. I guess I could always sell my JWT on eBay.

[elwesso]

The maps will be the same 90-95, its just that it will be put on a different ECU.. its basically the same stuff regardless of the year..

[Q45denver]

OK-that's good to know-takes care of another concern I had switching to the updated injectors.

[RobertsnewQ]

The OEM fuel maps between 93 and 94 are EXACTLY the same.