Has this actually been proven? Sorry if this has been covered already; did a search and didn't find anything. Just curious if people are finding power loss months after adding exhaust/CAI/etc.

 

this is pissing me off.... I leave this forum for 4 months for a hiatus, come back and still no answer from people on this issue. Some people say yes, the ECU corrects itself, then others say this is psychological. The only source of any "evidence" is coming from a company who sells ECU chips. hmmmmm...

If nissan cant come forward and give us the truth then I wont buy a replacement 2007 model.

 

i used to believe that it does not change, but cheston/technosquare researched the ecu and saw that it does indeed make changes to adapt.

and guess what, i believe them.

 

It does change, but does not negate all performance mods. If you due a ecu update you will just benifit more from your mods. dynos have been proven with mods like CAI, pullies, flywheels, exhaust, etc. cars are dynoing 250+rwhp. For instance the crawford plenium shows peak hp gains as much as 20hp without an ecu. I am not sure but as of now if you use the technos ecu with the plenium you run lean. So, it depends on what your plan of action is and if you do an ecu make sure you tell them your mods for better performance

 

yes you are right about the dynos. But these dynos have been done after the mods were installed. I have read very very little about people dynoing, driving the car for 2-4 weeks and then a re-dyno. This is the only way to really test, and of course you need weather conditions to be almost identical.

HOWEVER, if vqracer says he believes technosquare, Ill have to believe them. The conclusion would then HAVE to be that gains are adjusted for, maybe not immediately, maybe not tommorow, but eventually.

Hey victor, do you have any exhaust mods then?

 

Doug at Crawford, shows no difference over time with his mods. Notably the Plenum. If he says so, I'm more inclined to believe him than TSI.

Lou

 

In Nissan's NISMO catalog, it says the camshafts does not need to adjust ECU to gain power. But it does not say the same thing on other parts(CAI, header). Is it possible ECU only react to mods that involve air/fuel upgrade?

 

Cams are an air/fuel upgrade

 

a cam adjust fuel AND air I think. Whatever A/F ratio you have it is possible the cam does not affect the ratio, so the computer does no correcting. I am only guessing...

I must also assume that the CAI would be corrected for because the computer "sees" all this air but fuel is the same...

anyway...I think it is dumb that a Nissan engineer is not speaking out about this!

 

you're not going to get a Nissan engineer to speak out about it - its not what they do

A cam is an air mod, it effects fueling as well becuase the ecu then has to reply with the appropriate amount of fuel. I would imagine that Nissan engineered their cam (or specced it out), so as not to upset the factory ecu. Remember too, your mods and their net results will vary by the gas you use too, and obviously in this vein Nissan needs to cater to the Cali folks as well as those of us on the east coast.

 

DYNO DOES NOT LIE



Dyno 1 done before battery disconnect, max pw was 242hp

Dyno 2 done under SAME condtions less than 30mins later 247hp


5hp increase with batttery disconnect (resets ecu)


***Numbers taken from Russel's DB 350Z Track***

 

We tried the SAME thing... on THREE (3) cars. Disconnecting and letting the ECU reset does NOT gain power.

It was the cooling for 30 minutes that helped.

 

you should ask him what his initial numbers he was seeing..

he told me that the plenum was seeing 'sustained' power but was lower from after initial install--

 

So does it mean until an upgrade ECU is out, all kind of mods(header, exhaust, intake...etc) are just useless.

 

Zsilverstone13

No, mods will show gains. they just work even better with a ecu upgrade. Our factory ecu can only adjust to a certain point. JWT is putting out some cams that are showing 20-25rwhp alone with no ecu upgrade.

 

so yall think that the best mod rightnow despite ECU anomalies is the plenum. Should I do this instead of go borla? How much will this frakenstein manifold decrease the value of the car?

 

I dont trust that battey disconnect.. I rather go threw the procedure with the gas pedal.. Last night i was at the track and a kid with a auto G35 coupe was running 14.9.. I was like damn thats slow.. When i talked to him he was like I ran 14.9 4 or 5 times in a row with NOTHING better.. Keep in mind he has auto.. So I asked him did you reset you ECU??? He said no.. He didnt know how so I went over and did it for him.. I told him to launch the same that you have been.. He said ok and guess what?!?!?!?!?!?! He ran a 14.6 and didnt change a thing.. He said the way he was launching he didnt spin or bog on any of his 5 or 6 runs.. So I see this as being a pretty good test of how the ECU sucks...

 

Forget what i just posted above as i got bad Info.. He was spinning alot on the 14.9 runs and didnt on the 14.6... I was told otherwise till now sorry about that..