Guaging interest on a BETTER THAN JWT Q45 ECU.

[3Q Jay]

hey Robert-how's the timline look for the b13 daughterboard? trying to gauge how hard to press finding a 91/92 TCS box.also, sent you mail about the pwb offer......

[Q45denver]

- Safer knock timing map: A little known fact about the JWT ECU is that they only used one map... Most people know that if the knock sensors detect knocking, it will switch to an alternate set of fuel and timing parameters.. The JWT does NOT have this feature. So its safe to say, that if the car ever knocked, it may never stop knocking!! They did this so taht people with bad knock sensors would feel a difference. OUR ECU WILL NOT DO ANYTHING IF YOU HAVE BAD KNOCK SENSORS. When the ECU detects the KS are bad, it defaults to the knock timing map, which is significantly less powerful than the regular one..

So your saying that the JWT did not retard the timing upon knocking, basically rendering the KS worthless? That would explain the two blown engines I got after installing the JWT.

[97Q45t]

I am also extremely interested in a modified ECM for the Y33.

[elwesso]

So your saying that the JWT did not retard the timing upon knocking, basically rendering the KS worthless? That would explain the two blown engines I got after installing the JWT.

Correct... WEll actually, they *did* have a knock map, but it was not changed enough to prevent knock..... IT was only slightly retarded.

[elwesso]

THe problem I see with the Y33 Q is that they still use the later generation things, so I dont forsee us being able to do them until we have the 94s taken care of...

I'll keep an eye out on ebay and if i find one,ill buy it.

[RobertsnewQ]

Hi Jay - got your email. Waiting for Wes' 94 ECU to figure out the daughterboard thing. The on I expected to work, didn't.

[elwesso]

ATTN Y33 GUYS:

Am bidding on this ECU.......

http://cgi.ebay.com/ebaymotors...wItem

I will buy this ECU and send it to Robert so he can test it... If someone would do the favor of watching it for me if I dont... in case I get sniped, i should be able to, but i lost an auction last night because my internet was stupid.

[Q45denver]

Correct... WEll actually, they *did* have a knock map, but it was not changed enough to prevent knock..... IT was only slightly retarded.

I guess prolonged knock or at high RPM's would take out the rod bearings?

[RobertsnewQ]

I guess prolonged knock or at high RPM's would take out the rod bearings?

More likely causes the upper ring lands to collapse, or holes a piston if allowed to go on long enough. But you would really have to keep your foot in it to kill a stock motor with minor knock! Maybe if you ran 87 octane or something, but the JWT tune is pretty safe overall.

[3Q Jay]

you wanna borrow my spare?

[zinkie13]

I don't know if I am the closest y33 owner to you or not, but I could probably come up there middle of next week or next weekend so you could have a car to test on. Let me know if you want to do that.

[elwesso]

I already bought a 97-01 Q ECU.....

[Falkdesigns]

WOOT!! If you guys get this to work, I would be so freakin stoked. My Q (maybe it's rare) is very quick to begin with (was able to easily keep with some dude in a Lex. LS on Sat night, with my Q loaded with big fella's), and a little more umph would be, to coin the phrase, "Golden".

[elwesso]

THe Y33 ECU will be arriving at Robert's house in a matter of days...

You Y33 guys are just a step closer to getting an actual upgrade to your car's performance.....

[99q45t_vl]

Great news !!!

[BlackBirdVQ]

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 ?

[Q451990]

It's exciting to see this one unfolding! I would love to get Robert and Q45Tech in the same room and just listen...

It'll be cool to do side by side data logging once they're done and see how it all works out.

Heath

[maxnix]

It's exciting to see this one unfolding! I would love to get Robert and Q45Tech in the same room and just listen...

It'll be cool to do side by side data logging once they're done and see how it all works out.

Heath

I bet we could sell tickets for that!

[elwesso]

It would be golden indeed.....

Mike you can have the most advanced thing... One thing that is important to remember, due to the amount of timing advance it is CRITICAL that you have the timing rihgt at 15*... I had to readjust mine...

[RobertsnewQ]

It would be golden indeed.....

Mike you can have the most advanced thing... One thing that is important to remember, due to the amount of timing advance it is CRITICAL that you have the timing rihgt at 15*... I had to readjust mine...

Yes, this can't be stressed enough. For this to work for you, you need two things:1. Working Knock sensors2. timing right at 15 deg.

Timing maps are adjusted with base timing in mind, so if your base timing is off (mine was off 2 degrees and it had never been touched in 80k miles), the maps will be off and you will get knock. If the ECU hears enough knock incidents, it will switch to the low octane maps, and you will be back to almost stock power. If the KS are bad, it will revert to the low octane maps automatically and your power will suck.

[maxnix]

Great going, Robert! Very impressive! Any hope to reflash the later G50 ECM?

[elwesso]

WE'll konw more when he recieves my 94 ECU when he gets it.

[BlackBirdVQ]

Wes,

I have new wireing harness-full engine, new injectors, new KS, new MAF, fully rebuilt cylinder heads, intake manifold port matched etc.... My timing will be dead on 15 deg. I recall from my early days in Nissan modyfing my 93 SE-R didn't make any good power with timing advanced anywhere from 15 deg stock- with JWT ECU. I only run 93 octane in all my cars. Anyone whos seen or driven any of my cars knows that I take care of my cars with the most attention.

How do I get a ECU ?

[RobertsnewQ]

send me an email at [email protected].

What year/specs is your car?

[BlackBirdVQ]

I'm at work stealing some WiFi via my laptop... so I will have to E-mail you when I do get home.

My car is a base 94 Q45 with TCS. I have a wideband 02 sensor in my Maxima which I can remove for some tuning to give ya an idea what the stock ECU AF is, but that won't happen for bout a month as I am stuck in the middle of my engine reassembly waiting for my valve covers and injectors to come in. I also need to order up my underplenum hose kit from Infiniti of Scottsdale this week. Since Q45 is not a snowmobile, especially with those cheap 15" tires I got on it- I am driving my 01 Max with Blizzaks durring the snowy season. I have quite a bit of $$$$ invested in my engine ( refused to buy a unknown JDM engine ) and I would like to see every bit of HP extraced from the engine.

[RobertsnewQ]

Very cool. I've got a WB02 also - impossible to tune without it. The fuel maps I've tweaked slightly to richen the low end and lean the high end (RPM wise). High load areas on the stock map are VERY rich.

For your car I'm pretty sure you can run it on a 90-93 TCS ECU - they're pin compatible. Are you going to leave the TCS parts in the car and functioning?

[BlackBirdVQ]

Yeah I would like to keep TCS working, I been searching Ebay for a ECU that will work with my car, but it seems that all they have is non TCS ones. I don't like any idiot lights on the dashboard so TCS is a must for me.

What kinda AF are you getting out of the VH45 under WOT ? I have my Max tunned to run 13.5:1 from 3500-6700RPMs and she rips. I wish I could have a ECU done on my Max, TechnoSquare charges too much and there are very small gains from it. BTW its a 01 Max, which uses the similar ECU to a Z33, and its flashable via Consult.

[rsiwicki]

BlackBirdVQ....check out the two links below to my dyno graphs on my 95 Q45. The last two are totally stock with about 135K on the clock....the first two are with the car completely modified running headers and JWT ECU. I keep my car maintained pretty damn good and I need every pony to get below a 14sec 1/4 ET and I am hoping this new ECU will do the trick. You can definitely see a difference in the AF ratio as it approaches redline. With the JWT ECU I am right at about 13:1 close to redline....with the stock I was very close to 12:1 at redline.

Modified (Headers, JWT ECU, etc.)http://nissaninfiniticlub.net/...1.jpg

http://nissaninfiniticlub.net/...1.jpg

Totally Stockhttp://nissaninfiniticlub.net/...2.jpg

http://nissaninfiniticlub.net/...1.jpg

Just noticed the pics are not that great via the link....go check them out under the "gallery" section under my name and you will see them in better detail.

[RobertsnewQ]

I'm running them close to 13:1 - a TINY bit leaner than JWT in some spots but close to theirs everywhere else. The fuel curve is smoother, too, with softer transitions between zones (load, high RPM, low RPM and midrange). The JWT map is awfully rich in the cruise zone (same as OEM "knock" fuel map), and I leaned it out in that area to improve fuel economy slightly.

As for the Max, OBD-II stuff in general is MUCH harder than earlier ECUs to tune. One of these days I'll look into it, but I don't have an OBD-II Nissan anymore. Maybe after I see what can be done with the Y33.
Modified by RobertsnewQ at 10:18 AM 12/8/2005

[Falkdesigns]

So does this mean you're not going to do the Y33 ECU then?