I'm just trying to find out some basic info on the JWT ECU chip, such as what are the pros/cons, how easy is it to install, how much, ect. give it all to me.
-jc

 

from what I've read on the .org the JWT chip is USELESS

 

see, ive been debating on getting the JWT becuase it looks like it is removable. If it does nothing I'll just go to Autothority and ask them about a custom chip

 

You mean JET ecu correct? Because JWT is about the only company that has cracked Nissan ecu codes. The ecus for the 3 gen and early 4th gen maximas are documented and real. Apparently you don't read much?

There is not ecu available from JWT or anyone else(despite what anyone says) for the late 4-gen or ANY 5-gen.

 

JET?? fill me in on this

 

if Authority says they can make a custom chip for us 5th gen's
make sure you let us know and make sure they provide dyno's.

 

Here's all the technical data you need to know about JET.

They suck goat nads. If you like to pay a few hundred dollars for them to put their JET sticker on a stock ecu and send it right back, go ahead.

 

well, f-that!! I'll just do my q&a over at Autothority. If I find anything out, I'll post it.
-jc

 

I doubt they will do anything for the Nissan Maxima either. But at least they are a legit company. Just that they have stopped doing ecus for maximas from the 3-gen and even stopped offering those also. Can't hurt to ask

 

Do you people really beleive there are sufficient gains to be had by blowing $600 on JWT or anything else? If you can program it yourself, or have someone program it for you with YOUR car on the dyno then you're wasting your money anyways. I agree that Jet blows goats for the most part. JWT does too unless you go to their facility and get a custom program.

This is making me sick to my stomach that everyone is asking for a useless ECU program when all along the ONLY thing we should be asking for is a piggyback management system that WE can program ourselves!

JET is going to release such a device for domestic cars at the next SEMA show. Then about a year or two after that they will release a device for import cars as well. And before you comment again on how much Jet sucks, stop and think about how much better off we would all be if we could do all of our own programming.
Personally I would prefer to have something like that from JWT. And thats only because they have the most experience with the Nissan ECU. But I think JWT has their priorities in other avenues and don't give a dang about what we really want.

 

In this case, spending ANY money on ANY chip for the 5-gen is a waste of time. Right now the only thing you can do is go full stand alone via Electromotive, Haltech, SDI maybe and maybe AEM. Personally I would trust JET any further than I could throw the salesman on the phone.

But JWT does have VERY good programs for the early 4-gens and older maximas. ie.. na applications, turbo applications, turbo and nos together, only nos etc.... Very legit and well worth the $$.

Just because you the ecu has the ability to be programmed by the user, doesn't mean you would be able to get any more power. It's more likely you would LOSE power. On top of the $800-$1200 entrance fee for a fully programmable ecu, you would have to pay another $200+ in dyno time and another few hundred for someone qualified enough to fiddle with the ecu program(and not burn a piston while tuning it)

 

So you're trying to assume that no one can write their own program and gain hp on a modified engine? And you're assuming that I am talking about gaining hp on a stock engine? ECU programming on a stock engine is a complete waste of time and money.
I don't give a flip about how good their programs are for older cars that no one buys anymore. We're talking about there here and now.

 

Of course not. If no one could write their own programs, how would anyone tune it? Actually, if you are not writing a new program, you are just filling in the ign/fuel tables and maybe the cold start tables. So you can do all of this right? What mods for the 5-gen are you talking about? 2k2 3.5? 2k1 3.0?

As far as ecus on stock maximas, JWT had some for the 3-gens that are worth anywhere from 13-20hp depending on the engine VG or VE. You mean that's not worth it? It also raises the stock rev limiter. And for another smaller fee, it can be reprogramed for a daughterboard(nos) or boost maps. So yes, JWT is great for stock, modified na or boosted 3-gens.

Well the here and now is this. There are zero non stand alone ecu programs available for the 5-gen. And any future programmable ecus will end up costing $2000+ after all is said and done.

But the here and now for 3gens, is we can run stand alone, maybe Z31 ecus, M30 ecus, JWT ecus.

 

Do a search on me and ecu's Ive written about um in here at least 1,000 times.

 

Uh Jeff, I think this guy is refering to the JWT modified ECU that was on the 2000 STe Maxima.

 

GIAC cracked the OBDII for alot of the european cars and gets some decent real gains out of them. I had a GIAC vchip for my Audi, about a 47 horse increase (not naturally aspirated).

What standards are the Nissan Ecus written under or guided by?

 

Here is my counter point, JWT offers different programs for the SE-Rs (b13 or B14 are the same). The standard ECU upgrade works and I could show a dyno to prove it. Also there couldn't be much difference in mods unless cams are thrown in. For example let's say you had a 2 se-rs one a 91 and the next a 93. If the 91 has CAI/H/E/UDP the modifications wouldn't be different than a 93 with pop/h/e. Now with cams it is totally different, JWT/se-r enthusisats (sp?) have done hundreds of dyno runs with all type of combinations of mods and found out that there isn't a significant difference between boltons without cams. Now in the 4th gens the JWT/G-force's gains are 90% from advancing the ignition timing. IIRC 4th gens run 15*BTDC, in se-r's bumping the timing to 19*BTDC gains around 3-6whp/3-6wtq.


Here is what I found from search http://forums.maxima.org/showthread....ight=piggyback

At JWT IIRC there is only one person that does the ECU work, that is Clark Steppler. With the new spec V's, and other nissans I'm sure they are working on the priorites are. For example they have way more business with the SE-R/Z crowd than anyone else. This is what I suggest doing. Instead of waiting for JWT to make a 5th gen ECU, take matters into your own hands and do your own R&D. If you could develope an adapter harness that would allow you to run a 4th gen ECU in a 5th gen car, then all you need is a 4th gen ECU to have reprogrammed. I know that there are several adapter harnesses for honda's out so they can go from OBD-II to OBD-I.

Here is another approach, remove your ECU and find out the model # of the ROM. If you can find a replace then you can socket it and then dump the contents from it. However you'd need a background in EE and know how to write assembly programs. Then after looking at all the info in hexidecimal form, you'd have to figure out which part of code controls what? For example if you were to modify the timing curve you could change the engine temp sensor response instead. So now once the car hits a certain temp the fans don't turn on! Its a big project and some people have pulled it off. Here is a person that cracked the code in his 300zx, he would be able to give some advice http://ashleypowers.com/Data%20Acquisition/daq.htm.

 

JWT rewired to the car to a 95 ECU's spec and reprogrammed a 95 ECU.

 

Whether they work or not, my performance guy said he talked to one of the JWT guys recently and they have begun production of 2000+ Nissan ECU mods. Unfortunately, Maximas are behind every other Nissan model; so, don't expect anything until at least next year.

 

Wow it took you three months to respond, now thats a well thought out reply

 

advance...

 

can someone explain the steps that one would go about advancing the timing 3 degrees? im not gonna do it myself but the only way that i could find to advance the timing had to do with the distributer which our cars dont have. thanks

will

 

I emailed them a while back (2001), asking them about selection criteria.
Apparently the only reason they concentrated on VW/Euro cars is that's what the owner was racing/most familiar with.
They said that they'd look into Asian makes in about a year (now), but who knows what happened.
It might be worth another email.

 

I wish they made a JWT Chip for 5th gens. The 4th Gens see a nice gain with it.

As for JET, a lot of people knock it but Nealoc187 had one and installed it. He felt gains in the mid range he said.

 

Does the nissan dealer have the ability to advance the ignition timing via CONSULT? You can get a jwt chip, just rewire the car to a 4th gen harness .

 

performed by the dealer with the Consult II tool. The tech just needs to hook up the Consult, page thru to the sections on 'timing' and use the keys to adjust static timing up or down -in our/my case, up. It took the tech who did my car about 15-20 minutes and that was even playing with it a bit, hooking up a timing light to see if the timing indeed changed and/or reverted back to the stock +15 degree setting after a shutdown & restart, etc.

My car was the first he did this to so he was a bit skeptical at first, that's why he played with it a lot -I was right there by his side & can confirm it does work..of course, u can feel it, too..the car definitely pulls stronger in the midrange...not as noticeable at very high RPMs but definitely, more torque is being produced between 2000 and -say- 4000 RPMs

 

Galo,
Are you still satisfied with the timing advance? I'm taking my Max in for a switch to synthetic trans fluid next week, and I may have them advance the timing. You mentioned b4 that you might even get a little better gas mileage. Any other goods or bads from this mod. Thanks.
Gail

 

very much...still getting about 12-25 more miles per tankful or about 1 more MPG. Still no pinging at all, less worried about it now that weather's getting cooler....still suggest you see Craig at Beaverton Nissan & do it!!

 

Thanks, Galo. Got it scheduled !!