Hey fellow Z-heads

I was reading a long post from InternetAbyss last night and it was mention that the ECU was downgrade to make only 287 hp when it was actually is able to make 320 hp if tuned properly with everything stock. Has anyone out there heard of a way to do this or found a good addon that makes the ECU think differently?

 

I think that could be a rumor, what post are you looking at? either way, no ECU mods yet, there will be eventually. nismo should offer one, and if this story has any truth, they should have the code that gets the 320hp... tho I HIGHLY doubt it. people are saying 287 is over rated, if they could have 320 why wouldnt they atleast get the full 287hp?

 

I got this info from a post from InternetAbyss . You should read it. It has a lot of juicy info.

 

ahhh thought so. that post is 2 months old, I wouldnt be so sure its truthful... for some reason that post was revived, Im not sure for what reason.

 

Someone who has been close to the 350Z for various reasons said it could easily be upped to 300hp from ECU remapping. That makes sense b/c 13-15 hp sounds about right on a N/A engine that is already pretty effecient

 

Just about any car "can" have it's ecu recalibrated for more horsepower. This is because almost everything in life is a compromise.

When the engineers program the ECU for the car, in almost all cases, their priority list is Emmissions first, MPG second, and Power third.

Now for some low volume "sports cars" the MPG and Power are swapped. However, Emmissions is always number one priority.

It would probably be rather easy to squeeze more HP out of the 350Z with a retuned ecu however, I doubt you would still retain legal exhaust emmisions. Remeber, the factory HAS TO play by the rules..... We don't

 

I do... I donno but you guys, but I have to pass emmisions every other year, that means keep emmisions down and keep the catylitic converter...

 

No big deal. It's all about keeping your stock parts. If you don't have a shop that will just pass you, buy a whole ECU. When inspection time rolls around, go back to stock. Running a straight pipe, keep the cat, put it back when inspecting. My brief look over our car tells me that it's not difficult to get to those things so install is relatively simple.

And federal emmisions standards for a vehilce coming to this country are a lot stiffer than a state inspection.

 

yes, that they are. and you can put most stuff back to stock, but at some point it becomes a pain. exhaust systems that are welded with headers, intake, ECU. how far do you go? it would be good to find a shop that will pass you, maybe for a price?

 

I don't believe our exhaust is welded to headers. I don't believe a cat back would effect emissions that greatly. I don't even believe the ECU would either. Now a turbo kit? yeah that would. I'm told by people in the automotive industry that the main reason for the decline in factory turbo charged vehicles in recent years is due to the fact that very seldom does a turbo charger vehicle pass the proposed future emissions regulations and few manufacturers want to start a platform that may not be legal.

Finding a shop shouldn't be that difficult. They want you in and out quick and your money.

 

LOL!!

 

settle down LA boy...
The Z is already ULEV. I don't think 200 moded Zs runing around on the earth are going to melt any icebergs.

 

not welded to the headers, but actually cat back welded to the cat... precat is useless restriction, only there to catylize before the main cat can heat up enough. yes youll put out harmful gas in the first 10 minutes, but not after that. either way, its useless till the engine starts turning more power from FI, making it nescessary to dismiss the emmisions faster.

 

if we were able to tune our ecu, would this affect warranty? or would nissan not even know?

 

How did you take a thread about mods all the way to ending it with the tragedy of 9-11??????

We are not here to fight. I don't like the smell of exhaust (or the drone) of a car without Cats either and I am all for protecting our environment (while busses, big rigs, and large factories, chimnies etc billow out ozone polutants all day everyday) but WTF does that have to do with the tragedy and *terrorism* of 9-11???

Do you ever burn a wood fireplace? Would you be suprised to know that is in the top 10 offender list of air pollutants?

Should we blame that on terrorism too?

Heck, I shouldn't even respond. I am exiting out of this thread.

L8TR

 

Maybe just bolt on of these in

http://www.impul.co.jp/shop/z33.kaihatu.htm

 

On freeing up HP, pollution, and weather the dealer will know if you changed anything.

The amount of power that you can usually gain from an N/A motor is usually minimal 5-10HP with ECU tuning. But, if this car was deliberately detuned from over 300HP by doing something like making the car agressively pull timing then yes, it is possible that an ECU will show us big gains. There are other instances of this happening on N/A motors. The Audi 4.2 V8 in the A6 platform gains about 25HP with an ECU upgrade because Audi deliberately detuned the motor.

Increased pollution from ECU tuning is possible but not likely. One of the biggest changes you can make in an ECU on a N/A car is advance timing and maybe add a little more fuel if you can flow enough air. These changes aren't going to have much affect on your emissions system.

It generally is possible for the dealer to tell if an ECU has been altered. Even plug-in style ECUs are usually under a cover that is held on by several screws. Dealers will look closely to see if the screws have been tampered with. If they really suspect something they can put the car on their diagnostic equipment and usually find out of spec values in the logs. If say, you moved the rev limiter up 500 RPM they may find instances of you shifting beyond the factor limit and deduce that the ECU has been altered. That said, unless the car starts having a bunch of ECU related problems there's probably little chance that the dealer would ever take steps to figure this out.