performance ecu & headers info (jltibbs, maxhopper, nismonkey)

[nismo1219]

ok guys, heres the deal....

my headers and spoiler we delivered monday and are getting installed this weekend, so theres some good news. i also have been doing some "research" and here is what i've come up with.....

i wanted to wait until AFTER the headers/y-pipe install to post this so i could include an evaluation of the header setup as well, but ill go ahead and get this started now. the headers/y-pipe are stainless steel and look very nice. im not exactly sure of performance gains but will post those later. i told you i would send you guys a link about this setup so here are a few pages with info to look at...

1) http://forums.maxima.org/showt...pp=302) http://forums.maxima.org/showthread.php?t=2739953) http://www.vqpower.com/v2/modu...id=884) http://cgi.ebay.com/ebaymotors...QrdZ1 (these are a set like the ones i bought)

ok so i hope that helps with the headers. now for the ecu. i have concluded that if you own a later model 4th gen (97-99) then you are just skrewed. JET offers a package where you send in YOUR stock ecu to be reprogrammed. i personally called them this morning and was told that it is dyno-ed to add 15 hp and 12 lbs torque at the wheels. sounds like a good deal for $399 (from JET) or $350 (from CustomEnterprise). however, they cannot remove or raise the speed limiter found on the gle and gxe models, which was my primary reason for doing the mod. so then i called Jim Wolf Tech. i was told by them that they can reprogram 95-96 maxima with auto or manual transmission's. they could also do 97 ecu with manual by altering a 96 ecu to fit. but they couldnt do a 98-99 ecu because it was wired into the anti-theft system and some other technicalities. so....there you have.

does ANYONE has ANY idea how to get rid of that cursed speed limiter WITHOUT lighting up check engine lights please let me know. i also called a local tune shop (crawford z) and was told tunning gives such a minimal addition that its not even worth the effort. can anyone give any other advice????








Modified by nismo1219 at 11:50 AM 8/2/2006

[Beancooker]

First off, JET SUCKS. Second Greddy EManage ultimate. I have researched this a whole lot. Upgrading my ECU is next on my list of mods. look here:http://www.greddy.com/dir_tech.htm. I have read more than a bible about our cars ECU's and GreddyEMU is the way to go.
Modified by beancooker at 10:00 AM 8/5/2006

[nismo1219]

noah, please let me know when you get yours installed. and if you could included install write-up and basic how to, to get me started in the right direction. i dont wanna program it thinkin im doing good only to be loosing hp!! that would suck, lol!! thanks again!!

[Beancooker]

Sorry to cut last post short, (employee out of gas) - If you own a Chevy truck the Jet stage 3 hyper chip is the way to go, but for a Nissan, NO! It will be a while before I can get the GEMU, (I have the FAPR [female aftermarket parts restrictor] mod in my life) and I will have Axiom Motorsports (http://www.axiommotorsports.com/) dyno tune it. When all said and done I'll post all the info I have. Kyle at Axiom said it should be good for about 50HP. It will let you raise the rev limiter and adjust the timing and fuel/air maps to proper spec to extract the unused HP in the high RPM range. Remember Nissan made our cars thinking of the average 40 year old soccer mom in mind, power is good but mileage is better. I think that philosophy is BS. Controlled power is the best. But with my wedding next week my finances are tapped, so I hope to have it on in October.PS the headers and Y-pipe look great!!!

[Fezzik]

You may try to contact technosquare. I am fairly sure they can remove the speed limiter on teh ecu but they take your ecu and reprogram it.

[Beancooker]

Technosquare has some great options for our cars, if you want a "plug and play" system. They give a decent HP gain but are not tuneable. With the Greddy EMU you can change a lot of parameters to achieve the maximum gains. They both cost $500. however you can just plug in the Technosquare and the Greddy you will have to program or pay to have dynotuned, which could cost a fair chunk of $$$.

[maxhopper]

Hey Ben, the headers look great. Be sure to post up how you like them once they're installed.

As for the JET computer, I would listen to the advise of the guys above. If they say it's no good, I would trust their judgment.

I've been thinking about the speed limiter. I know you can buy resistors and emulators for disconnecting the knock sensor and 02 sensors (respectively). Perhaps there is some way to fool the ECM once the wire is cut?

[nismo1219]

hey scott, i was wondering when you were gonna reply! i was beginning to have some doubts, lol! i picked up spoiler from being painted today and it looks great, so im anxious to get everything put on!! i am SUPPOSED to be having them installed tomorrow while im at work but my guy is in the middle of a "monte carlo" so hopefully he will finish in time to get mine done as well! keep your fingers crossed for me!! as soon as everything is done though, i will post up some new pics and ill let ya'll know how the headers/y-pipe perform.

[nismo1219]

well guys...the headers and everything are on hold. they were supposed to be installed saturday but my "mechanic" had an emergency so we will have to wait until whenever he gets another chance. this really sucks and im pretty bummed cause i have been looking forward to getting them on for so long! oh well, lets just hope everything will be on by nopi time...lol

[nismo1219]

this weekend is looking good for some installs! hopefully we can finally get those headers, y-pipe, spoiler, springs, and struts on this weekend!! keep your fingers crossed! if we get everything on ill post up some new pics!

[maxhopper]

Sounds like your install guy has a busy weekend ahead of him.

[nismo1219]

Sounds like your install guy has a busy weekend ahead of him.

i know! i told him if he didnt start installing pretty quick, the way things are going id have to rent a uhaul just to bring him the parts!! lol

[nismo1219]

ok just an update on things. my install guy has the car this weekend and is currently puttin gon the eibach springs and tociko struts right now. he should also get the headers, y-pipe and spoiler done today too. if so ill clean it up a bit tomorrow and post some new pics. still need to get my stillen body kit painted and installed and am still waiting on my autometer cobalt gauges...should be here early next week.

[audtatious]

These are the types of threads I had hoped would eventually hit over here. Glad to have you guys aboard to shake-n-stir things up.

The "other" aftermarket headers are actually designed to be equal-length. Anyone see issues with these not?

Def post up some pix so I know who to look for at NOPI. Looks like I will be bringing my Maxima to "add to the gang".

[maxhopper]

Cool, can't wait to see some pics. Sounds like you're going to be all set for the NOPI Nationals.

[nismo1219]

Cool, can't wait to see some pics. Sounds like you're going to be all set for the NOPI Nationals.

lol, well if i dont run out of money doing the installs first!! by the way, as an update, i should be getting my car back tomorrow! i know that all the struts & springs were installed today, so hopefully tomorrow he will have time ot do the headers, y-pipe, and spoiler. spoiler shouldnt take long since its already been painted - just needs to be mounted. anyways i will keep you guys up-to-date and post pics soon!

[nismo1219]

ok, here are some pics. he installed the eibach springs, tokico struts, rear sway bar, rear strut bar, and the spoiler. didnt have time to get to the headers & y-pipe though. hopefully they'll be on soon so ill post more pics then. hope you like, let me know what you think....

[maxhopper]

Looks tons better without the 4x4 wheel gap.

[audtatious]

Clean looking 4th gen

[Beancooker]

VERY CLEAN, nice I like it. Looks good without the gap.

[MinisterofDOOM]

Hot.

[Dragon_ryder]

The ride looks nice bro. I finally joined up (the guy who emailed you about the headers and y-pipe) I'll be putting my headers and Y-pipe on wed. Whatever we run into at the shop I'll let you know.

[nismo1219]

The ride looks nice bro. I finally joined up (the guy who emailed you about the headers and y-pipe) I'll be putting my headers and Y-pipe on wed. Whatever we run into at the shop I'll let you know.

awesome man! feel free to email me anytime! i hate my hotmail now, ever since they "redid" it i cant see what im typing when im sending an email...it totally sucks! anyways, didnt you say you got a set of the same headers i have? let me know how the install goes! im about to go crazy waiting for mine to be installed! good luck with yours and post some pics if you get any!! talk to you later!

[Dragon_ryder]

Looks like the same exact ones. I do know I'll run into some mess with the O2 sensors. There's 4 of them if I'm not mistaken, I could be wrong though.

[Dragon_ryder]

The headers are on and...... so is my service engine light The car sounds great though, it pretty much growled very loudly on the way home. I can't wait to hears moms mouth when I growl up the driveway at midnight tonight lol. I'll post what went I went through later after I get off work.

[nismo1219]

The headers are on and...... so is my service engine light The car sounds great though, it pretty much growled very loudly on the way home. I can't wait to hears moms mouth when I growl up the driveway at midnight tonight lol. I'll post what went I went through later after I get off work.

why did the engine light come on?? i really dont want any troubles this close to nopi, but im also DYING to get these freakin' things on!!! im kinda worried now about that light, i hope its nothing big...please keep me informed and let me know what you find out!! thanks again!!

[nismo1219]

by the way...any chance your going to nopi???

[Dragon_ryder]

Nope, I won't be at NOPI. My engine light is on cause I have the Cali emissions max that HAD two pre cats and 4 O2 sensors. The y-pipe only has room for two, which is the reason for my light being on. Installation was a hell of a time to say the least. I'll get my photos off my camera and post a link to them soon.

[nismo1219]

Nope, I won't be at NOPI. My engine light is on cause I have the Cali emissions max that HAD two pre cats and 4 O2 sensors. The y-pipe only has room for two, which is the reason for my light being on. Installation was a hell of a time to say the least. I'll get my photos off my camera and post a link to them soon.

my max is Fed spec emissions. so...there shouldnt be any problems with my engine light coming on, right??

[audtatious]

You will need to install a O2 simulator to get rid of the codes

http://www.o2sim.com/

You will need a dual-output simulator. You will "tap in" at the engine-side connections (green and blue connections in front of the motor).