'02+ Maxima ECU Cracked!!!
Originally Posted by maximamaybe
Did you already get the motor replaced? How did that process go? Is the NOS hooked up also? Sorry for all the questions, but have not seen an update lately.
Basically I had it done within a week of when I picked up the new motor. I could have done it quicker but I wasted a bunch of time.
Originally Posted by Quicksilver
Yep. My bro and I co-own a built RENNTech SLK 230. He paid for the car, and I handed them a blank check and said do your worst. That car is no joke...
Sad part is, he's selling it to buy an SUV or 4 door pickup. Oh well, on to the next project, I guess...
Sad part is, he's selling it to buy an SUV or 4 door pickup. Oh well, on to the next project, I guess...
What kind of 1/4-times or dyno numbers?
All 2k-2k1 Owners Vote Now!!!!!!!
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Originally Posted by Quicksilver
Yep. My bro and I co-own a built RENNTech SLK 230. He paid for the car, and I handed them a blank check and said do your worst. That car is no joke...
Sad part is, he's selling it to buy an SUV or 4 door pickup. Oh well, on to the next project, I guess...
Sad part is, he's selling it to buy an SUV or 4 door pickup. Oh well, on to the next project, I guess...
Just curious if anyone on this board really cares? Stick to the thread and not worry about a low end kiddie benz.
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Originally Posted by IceY2K1
5spd Cali. I would be happy with a 7100 rpm.
Supporting Maxima.org Member
Joined: May 2002
Posts: 1,815
From: Atlanta
Originally Posted by LithiuMax
Anyone want to address my qestions? Also, what kind of gains are we looking at in the 1/4 mile? Will this void engine warranty? What if something goes awry with the chip in a year? Who will be responsible?
1/4mi .2-.3 maybe another tick with increased rev limit.
Nissan will not know.
This is not a chip it is a software reflash of the eprom.
No info on that yet.
Originally Posted by LithiuMax
Will this void engine warranty?
What if something goes awry with the chip in a year? Who will be responsible?
VQ35DE's phyiscal limit of 7600 RPM for 15minutes will blow the motor. Rods will stretch and them bye-bye.
7100, even 7200 RPM rev limit is considered "relatively safe" but the main reason why it is raised to that point was for you to shift like you would normally and avoid hitting the stock rev limiter which causes the fuel cut off.
there is absolutely NO benefit power wise raising the rev limiter any higher in an N/A maxima.. i can take the excuse of 'i'm running boost' but anything otehr than that. there is no point due to the fact the VQ35's power band STILL sucks azz after 5600rpms anyway.
if you are so bent on having your rev limiter set at some ungodly amount like you said 8000 or 7600, just sign a waiver form and you can probably have them set it for you, but its you're own risk. you have to understand that they run a business, they have to cover their assets.. just because you say you want it at 7900, as a business owner, they are looking out for your wellbeing and safety. if the engine were to explode, causing the fire due to the higher rev limit, and you end up suing them, who's would be at fault? the owner? or the company that reluctantly programmed the computer for the higher rev limit even tho its stated it was unadvisable... most courts would say that the company was at fault for knowing the dangers and still going ahead with the mod...
as for the 7100 redline.. my Z has it. and i've been up there a few times when testing the turbo. but i dont want a
from you, please dear god no.
obviously the maxima ECUs have to be further developed and you will get your proof.. everyone should take a deep breath and calm down... impatience kills good projects.
7100, even 7200 RPM rev limit is considered "relatively safe" but the main reason why it is raised to that point was for you to shift like you would normally and avoid hitting the stock rev limiter which causes the fuel cut off.
there is absolutely NO benefit power wise raising the rev limiter any higher in an N/A maxima.. i can take the excuse of 'i'm running boost' but anything otehr than that. there is no point due to the fact the VQ35's power band STILL sucks azz after 5600rpms anyway.
if you are so bent on having your rev limiter set at some ungodly amount like you said 8000 or 7600, just sign a waiver form and you can probably have them set it for you, but its you're own risk. you have to understand that they run a business, they have to cover their assets.. just because you say you want it at 7900, as a business owner, they are looking out for your wellbeing and safety. if the engine were to explode, causing the fire due to the higher rev limit, and you end up suing them, who's would be at fault? the owner? or the company that reluctantly programmed the computer for the higher rev limit even tho its stated it was unadvisable... most courts would say that the company was at fault for knowing the dangers and still going ahead with the mod...
as for the 7100 redline.. my Z has it. and i've been up there a few times when testing the turbo. but i dont want a
from you, please dear god no.obviously the maxima ECUs have to be further developed and you will get your proof.. everyone should take a deep breath and calm down... impatience kills good projects.
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Ice, stop with the attitude, man. I really did NOT know the answer, because I was not sure if it would be obvious to the dealership or not. Seems like anyone questioning any of this gets all kinds of ****ed up attitude, and I don't really get that at all.
It's chrome alright...
Joined: Dec 2001
Posts: 3,999
Originally Posted by IceY2K1
EXACTLY what I said about JWT.
The REAL reason is that they must extend the fuel/timing maps, which probably isn't that easy to do in the limited space they have to work with. Otherwise, the ECU would probably just maintain the last known value.
The REAL reason is that they must extend the fuel/timing maps, which probably isn't that easy to do in the limited space they have to work with. Otherwise, the ECU would probably just maintain the last known value.
I've been emailing them as well... as soon as there's a dyno, I'm buying.
I don't buy the "we don't want to be responsible BS".
THAT sounds better then my GUESS.
However, it's pretty CLEAR that anything over the stock rev-limiter is over-stressing the engine beyond the normal design. Common sense says 7000 or 7500 is at risk, so honestly I don't see that excuse holding water either.
I'll sign whatever waiver they want and keep what ECU I run under wraps if that is all it takes.
Originally Posted by 2k2wannabe
I would have guessed the "real" reason is because no matter what you say, if you blow the motor because they raise the limit, guess who looks bad? Them. I'm not saying you'd badmouth them, I'm saying no matter how many times you say "the motor blew because I had them raise the limit to 7500" all people are going to hear are "technosquare" and "blew the motor."
I've been emailing them as well... as soon as there's a dyno, I'm buying.
I've been emailing them as well... as soon as there's a dyno, I'm buying.
However, it's pretty CLEAR that anything over the stock rev-limiter is over-stressing the engine beyond the normal design. Common sense says 7000 or 7500 is at risk, so honestly I don't see that excuse holding water either.I'll sign whatever waiver they want and keep what ECU I run under wraps if that is all it takes.
Originally Posted by LithiuMax
Ice, stop with the attitude, man. I really did NOT know the answer, because I was not sure if it would be obvious to the dealership or not.
Dealerships *SUPPOSEDLY* can't tell, but I would NOT count on that. IF something does happen, ie spin a bearing, over-rev, bend a valve, or something like that, you'd better be prepared to bend-over for the shaft. If you are just going in for service, ie oil change, routine TSBs
, minor warranty work, then I'd say you don't have ANYTHING to worry about.
Seems like anyone questioning any of this gets all kinds of ****ed up attitude, and I don't really get that at all.
) aftermarket suppliers, because of our b!tching/cheap azz ways and *THIS* company is NOT one I'm willing to lose.
Originally Posted by Chebosto
the beta tester has confirmed that his maxima is a 2002 maxima.
so this ecu is confirmed for 2002/2003 Maxima Ecus... (02/03 are the same)
so this ecu is confirmed for 2002/2003 Maxima Ecus... (02/03 are the same)
Do we know if the same program on the ECU will work with the Auto's...if so , im in for sure.... if I get the headers too, watch out 13's NA ! 
If your warranty is a concern, stay stock. Any **** dealer can void your warranty or give you a hard time because of this or any other mod they think is destructive to your car.
If your warranty is a concern, stay stock. Any **** dealer can void your warranty or give you a hard time because of this or any other mod they think is destructive to your car.
Originally Posted by 2k2wannabe
I would have guessed the "real" reason is because no matter what you say, if you blow the motor because they raise the limit, guess who looks bad? Them. I'm not saying you'd badmouth them, I'm saying no matter how many times you say "the motor blew because I had them raise the limit to 7500" all people are going to hear are "technosquare" and "blew the motor."
I've been emailing them as well... as soon as there's a dyno, I'm buying.
I've been emailing them as well... as soon as there's a dyno, I'm buying.
This is why I hate telling you people anything.Some of you simply don't get it do you?
It's chrome alright...
Joined: Dec 2001
Posts: 3,999
Originally Posted by SR20DEN
This is why I hate telling you people anything.Some of you simply don't get it do you?
are dying to find out. I see in his last email he said he said they can raise the limit if you request it... looking forward to never hearing you b!tch about blowing another motor. Oh, and I hope you got his permission to post those emails. I asked if I could share our emails with everyone here and he specifically asked me to keep it private until he said it was ok
Senior Member
Joined: Aug 2001
Posts: 956
Originally Posted by IceY2K1
Dealerships *SUPPOSEDLY* can't tell, but I would NOT count on that. IF something does happen, ie spin a bearing, over-rev, bend a valve, or something like that, you'd better be prepared to bend-over for the shaft. If you are just going in for service, ie oil change, routine TSBs, minor warranty work, then I'd say you don't have ANYTHING to worry about.
, minor warranty work, then I'd say you don't have ANYTHING to worry about.Any competent tech with a consult II could stumble across your rev limit value. 2nd most flash software image has a checksum. I'm pretty sure this checksum will come up different once TS modifies it, but I have not yet met that observative a tech even though they work on the cars all god damn day long.
Lithuimax, I would not worry at all, because "It's not what they know, it's what they can prove"! (Denzel - Training day) The burden of proof that you messed with the ECU will be on them.
say when, *BOOM*
SHIFT_woosh
Originally Posted by 2k2wannabe
I appreciate the info you give here, too, but have to ask "don't get what?" "We people" are dying to find out. I see in his last email he said he said they can raise the limit if you request it... looking forward to never hearing you b!tch about blowing another motor.
Oh, and I hope you got his permission to post those emails. I asked if I could share our emails with everyone here and he specifically asked me to keep it private until he said it was ok
are dying to find out. I see in his last email he said he said they can raise the limit if you request it... looking forward to never hearing you b!tch about blowing another motor. Oh, and I hope you got his permission to post those emails. I asked if I could share our emails with everyone here and he specifically asked me to keep it private until he said it was ok
And I did not ask to post those emails nor did he ask me not to do so. If you don't want to know what was said then simply do not read them.
Originally Posted by woosh
I would not count on it either, ICE. There are 2 possible ways your ECU change could be discovered.
Any competent tech with a consult II could stumble across your rev limit value. 2nd most flash software image has a checksum. I'm pretty sure this checksum will come up different once TS modifies it, but I have not yet met that observative a tech even though they work on the cars all god damn day long.
Lithuimax, I would not worry at all, because "It's not what they know, it's what they can prove"! (Denzel - Training day) The burden of proof that you messed with the ECU will be on them.
say when, *BOOM*
SHIFT_woosh
Any competent tech with a consult II could stumble across your rev limit value. 2nd most flash software image has a checksum. I'm pretty sure this checksum will come up different once TS modifies it, but I have not yet met that observative a tech even though they work on the cars all god damn day long.
Lithuimax, I would not worry at all, because "It's not what they know, it's what they can prove"! (Denzel - Training day) The burden of proof that you messed with the ECU will be on them.
say when, *BOOM*
SHIFT_woosh
It's chrome alright...
Joined: Dec 2001
Posts: 3,999
Originally Posted by SR20DEN
And I did not ask to post those emails nor did he ask me not to do so. If you don't want to know what was said then simply do not read them.
I asked if I could share the info, he said keep it private until they're ready to make it public. It has nothing to do with me wanting to know ... it has to do with respecting someone enough to ask if I they mind if I share information he shared with me. It's your responsibility to find out if they mind. It's called respect.Now back to more important stuff... what's the difference between DynoJet and Bosch dyno plots?? Anyone??
BOSCH DYNO decription:
Taken from a Website on the Bosch Type Dyno:
The BOSCH Chassis Dynamometer LPS 002 measures the dynamicwheel power and the power loss in the transmission, and displays the effective engine power (brake horsepower) directly as the sum of the two.
A test-roller set with a defined inertia effect (inertia flywheel) is driven and accelerated by the vehicle's driving wheels.
The power at the wheels can be determined from the acceleration of the Dynamometer mass with the engine running at wide-open throttle (WOT).
Upon reaching the measurement speed, the engine is disconnected from the remaining drive elements by declutching. The energy stored in the test-roller set now drives all the transmission elements with which the test rollers are in contact.
The power loss is determined from the deceleration resulting from the rolling resistance, and from the transmission and bearing resistance's.
Using the wheel power and the power loss, an electronic evaluation unit calculates the engine power at the clutch.
The evaluation circuitry measures the wheel power during acceleration and the power loss during deceleration
--------
the BOSCH is a dyno used for TUNING purposes... it will always read a little different than the 'standard' Dynojet... which really isnt the best to gauge power. but most people tend to read a dynojet with more 'trust' because they are used to it. but reguardless, if they use 1 dyno or another.. the same system should be used to tune purposes to get consistant results and to keep the 'variables' the same...
Taken from a Website on the Bosch Type Dyno:
The BOSCH Chassis Dynamometer LPS 002 measures the dynamicwheel power and the power loss in the transmission, and displays the effective engine power (brake horsepower) directly as the sum of the two.
A test-roller set with a defined inertia effect (inertia flywheel) is driven and accelerated by the vehicle's driving wheels.
The power at the wheels can be determined from the acceleration of the Dynamometer mass with the engine running at wide-open throttle (WOT).
Upon reaching the measurement speed, the engine is disconnected from the remaining drive elements by declutching. The energy stored in the test-roller set now drives all the transmission elements with which the test rollers are in contact.
The power loss is determined from the deceleration resulting from the rolling resistance, and from the transmission and bearing resistance's.
Using the wheel power and the power loss, an electronic evaluation unit calculates the engine power at the clutch.
The evaluation circuitry measures the wheel power during acceleration and the power loss during deceleration
--------
the BOSCH is a dyno used for TUNING purposes... it will always read a little different than the 'standard' Dynojet... which really isnt the best to gauge power. but most people tend to read a dynojet with more 'trust' because they are used to it. but reguardless, if they use 1 dyno or another.. the same system should be used to tune purposes to get consistant results and to keep the 'variables' the same...
I personally am waiting on my b-pipe (already have a franken) will get a UDpulley when my 36k is up(warranty) and do not plan to boost- $5K-$6K +
install- could be a very nice down payment for
a 350Z- So this ECU joint could be the end for me-
just enough to get maybe low-low 14's on street
tires- So can we get this poppin' please ASAP-
install- could be a very nice down payment for
a 350Z- So this ECU joint could be the end for me-
just enough to get maybe low-low 14's on street
tires- So can we get this poppin' please ASAP-
Senior Member
Joined: Feb 2003
Posts: 418
From: San Francisco, CA
The prime cost is very low compared to the actual price, economy sucks, capitalists and bourgeoisie class are at fault! 
Originally Posted by LithiuMax
Took one, hated it, now pre-med. 
Thanks for the info, though..
Thanks for the info, though..
unfortunately. the owner didnt have a base line bone bone bone stock dyno w/ a stock exhaust and stock ecu... so the only way is to gauge what others have dynoed.. which i've been told is to range from 204 to 208 fwhp from the factory...
the ECU was coded and the test car was bone stock in modifications other than a custom exhaust could NOT be taked off due to the fact it was a modified stock exhaust cut and replaced w/ less restrictive piping.. . i'm sorry about that.. but this was the first time i was told..
the Dyno was taken today and shows a stock maxima (+ custom exhaust) and with the ECU reflash, and a modified intake system (Injen)
BLUE LINE:
2002 Maxima 6 speed, stock airbox, with ECU upgrade and custom exhaust
RED LINE:
2002 Maxima 6 speed, Injen Intake, with ECU upgrade and custom exhaust
AMAZING gains from just the Injen Intake and the ECU...
we will try to get a Baseline 02 maxima bone stock in the near future..
but looking good guys
someone please tell me what the stock dynos for bone stock 02 maximas are...
oh yea.. 1 more thing..
the dyno(er) didnt take it up to the new redline which is at 7100, but you can see that he did end up hitting a point much higher than stock rev limiter..
the ECU was coded and the test car was bone stock in modifications other than a custom exhaust could NOT be taked off due to the fact it was a modified stock exhaust cut and replaced w/ less restrictive piping.. . i'm sorry about that.. but this was the first time i was told..
the Dyno was taken today and shows a stock maxima (+ custom exhaust) and with the ECU reflash, and a modified intake system (Injen)
BLUE LINE:
2002 Maxima 6 speed, stock airbox, with ECU upgrade and custom exhaust
RED LINE:
2002 Maxima 6 speed, Injen Intake, with ECU upgrade and custom exhaust
AMAZING gains from just the Injen Intake and the ECU...
we will try to get a Baseline 02 maxima bone stock in the near future..
but looking good guys
someone please tell me what the stock dynos for bone stock 02 maximas are...
oh yea.. 1 more thing..
the dyno(er) didnt take it up to the new redline which is at 7100, but you can see that he did end up hitting a point much higher than stock rev limiter..
Senior Member
Joined: Aug 2003
Posts: 175
Greg from www.greghome.com has a copy of his 02 6spd max dyno at /Mods/Performance/UDP/Post-UDP%20Dyno.jpg)
it shows max power to be 199.9hp
so it looks like a stock max would gain around 10hp with the ecu mod
it shows max power to be 199.9hp
so it looks like a stock max would gain around 10hp with the ecu mod
Looks GOOD Cheston, but damn that INJEN curve looks a hell lot better.
When you get a STOCK car for a baseline, have TechnoSquare duplicate the STOCK program to another ECU. Then dyno STOCK vs. TS program for an easier comparison.
Also, PLEASE show the 7K+ limiter, since that looks close to the 6600rpm fuel cut on Gregs' dyno(blue vs. blue).
When you get a STOCK car for a baseline, have TechnoSquare duplicate the STOCK program to another ECU. Then dyno STOCK vs. TS program for an easier comparison.
Also, PLEASE show the 7K+ limiter, since that looks close to the 6600rpm fuel cut on Gregs' dyno(blue vs. blue).
please remember, its not all about PEAK hp gains either!
once Technos can get a local 5th gen 02/03 max in house for further testing is when they can flash-on-the-fly and get some better numbers...
until then... i hope ppl are happy with the prototype results.. and results will vary from car to car based on fuel used and other mods...
once Technos can get a local 5th gen 02/03 max in house for further testing is when they can flash-on-the-fly and get some better numbers...
until then... i hope ppl are happy with the prototype results.. and results will vary from car to car based on fuel used and other mods...