Found it, thanks. For the G35, it's EC-68. Procedure is the same as above, except your done after step 8, since the ECM memory is erased upon holding the pedal in for more than 10 sec. So the Idle air Volume Learning procedure erases the ECM memory in the process, though the complete procedure only has to be performed if the ECM is disconnected from the car. Same with Accelerator Pedal Released Learning and Throttle Valve Closed Position Learning. Good to know should we decide to do the Technosquare ECM flash, though hopefully their program modifications won't interfere with these calibration processes.

 

Hahaha, sorry man! Must've slipped my mind.
But for me, if I was to get new rims and dyno, I'd probably use the new rims cuz a) that's what I would be rolling on everyday so I wanna see what power I was making each and every day instead... and b) i'd be too damn lazy to switch out my wheels back and forth to do a dyno. But thanks for clearing it up. Curious still about what the weights are for the track with tires and winnings with tires. I like the way the winnings look.

 

Way ahead of you.. that's why I'm trying to dyno over the weekend instead of today. I unhooked the battery as soon as I got home and will put the juice back on before I back the Z out to drive to the dyno shop tomorrow.

This is if I can get in tomorrow. If not, I'll repeat the process when the can schedule me in. I've never had a problem taking cars over there before, but I also have not gotten past the answering machine today...

 

mcduck, I am patiently waiting for your results. If you get gains like throbbing_Zon did then there will be no doubt in my mind that this exhaust makes power. If you do make significant gains then I can only wonder about my results. So here is what I think about my results:

1) They were just all f*cked up.

or

2) The ECU theory.

 

Just wanted to chime in on this ECU theory. First, there is no doubt in my mind that the exhaust makes power. But something is up because the car has lost some of it's kick since the initial install and I can't help but feel that this is due to the ECU. Also, looking at the underside of the car, you can see wires plugged into the cats. Could this be a sensor?

*webcarconnection's picture*


Import, I think your dyno chart reflects the effect of the ECU. throbbing_Zon's dyno shows an immediate gain throughout the powerband, while yours show a loss on the low rpms and gain up high. I think the last and final test to know for sure is for thr.._zon to dyno after a few hundred miles (not really asking you to dyno, zon, just speculating).

So, if the ECU really does nullify bolt ons, then anyone who has had a bolton for a while and dynoed today should see little to no gain from their baseline

Anyway, thanks to both you and throbbin_zon for taking the time to educate fellow members. The saga continues...

 

Well... good news and bad news on my effort to dyno. The shop I had the first dyno done can work me in, but not tomorrow. They will be at the speedway doing some other work all weekend. I could get the car dynoed at another location, but that would defeat the purpose of keeping everything (except the exhaust) the same from one dyno day to the other.

So, I will be doing this early next week. I plan to enjoy my car and new exhaust over the weekend. On Sunday night, I will unhooking the battery again. Then Tuesday, with help of half a vacation day from work, I will take it to the shop with the dyno.

With any luck, I'll have some good comparisons to post by Tuesday night. I know everyone is watching the Borla dynos closely so I'm sorry I have to delay this a few days. But, i feel it wouldn't be worthwhile if I did not run on the same dyno this time.

 

No problem...at least we are making progress.

 

This is what I got when I ask one of the service trainer for Nissan tech about if the ECU would adapt with any mods, and this is what I got :
(Yes, disconnecting the battery for 24hrs. should clear the ECM self-learn. That will only take the ECM back to it's base settings, it will start to re-learn (adapt) again from there. If they dyno checked this car for hp at the rear wheels that might be all they will get. Was the quote for hp increase at the flywheel or at the rear wheels? This question might be asked of the vendor. )

 

Yes that are Cats Sensors, but the Borla do not change anything in that area (Cats area) is install after the Cats!!!

 

If it senses air flow wouldn't the exhaust have an effect on it since it allows the gases to flow in larger amounts (even if the sensor is before the exhaust)? I would think that the addition of an exhaust has an effect that reaches all the way to the cylinder since we want exhaust gases to come out as quickly as possible.

 

there job is to wacht over the pollution not to senses air flow or backpressure so no matter what type of system you have the sensors will read the same.

I hope this help!!!

 

Those are the second set of O2 sensors, I would assume. They monitor the efficiency of combustion for emissions.

The first set of O2 are upstream of the cats, in the exhaust manifolds.

 

I've been waiting to post on this thread and have been holding off until I heard from some I know would know.

I've been advised of the following:

1. It's not the ECU.

The ECU will only retard functions if it senses detonation.

2. Dynos on the Z are very unreliable.

JWT have their own dyno. The dyno result on a Z will be totally differently due to heat, even after a single dyno run. It's such a problem that temperature sensors for air and water are used at JWT. We're talking 5-7 hp difference after an run, with the same dyno done a few minutes apart.

Apparantly, the NA engine dynos are very much subject to atmospheric conditions and will produced results very different depending upon whether the engine is cold or if the conditions change.

JWT has placed sensors in the intake box and they are checking water temperature just to get consistant readings. If JWT is having problems with dynos, don't expect reliable results from the run of the mill dyno spot.

3. Don't expect more than a 10 hp gain on any exhaust.

If Nismo can't get more than 10 hp, it's unlikely that even an aftermarket vendor like Borla will.

This one, I'm not certain of but it's coming from someone who's opinion I will defer to any day of the week.

4. Each car will be different.

Importriders has a car that is pulling 240-245 dynos when the norm is 230-235. This means his sample may not be the best example of what our exhausts actually produce.

5. On an off-topic subject

There still is no fix yet for the 3rd gear grind issue. If you're having problems with your tranny, bring it in while you're under warranty.

6. The JDM Nismo ECU

The JDM Nismo ECU was running on very high octane fuel. Don't expect an North American version. As far as a Nismo ECU, there is nothing yet in the works.

7. All these mods that are coming out...

The turbos, the superchargers, they're all bound to have problems because the car is tuned about as good as it's going to get.

So, in summary, it's not the ECU. Dynos for our car stink. Don't expect more than 10 hp from the Borla.

Now then, before you start posting about where did this information come from, don't bother. Believe it or not.

 

First of all, nice damn rims Import. I've been away for a while so I missed a lot I see.

And I go with Import about the ECU theory. I have some tuning friends that are reading up on the ECU on the Z. There are like 4 4 inch books on that crap. And they tell me that the ECU is pretty damn smart and complicated.

I'm supposed to have put in the S-AFC II soon but have to wait because of a few things. The main one being they told me to wait a few weeks while they figure out the ECU so they can tune everything correctly. And wait till I get a exhaust. (which hopefully will be in the next few weeks.)

So I'm with the ECU

 

I'm sorry to say this, but for someone who is apparently pretty knowledgeable, this is a very ignorant statement.

An auto manufacturer has more to deal with than just performance. They have to maintain a higher tolerance on emissions (yeah, we still have to pass with customer exhausts, but manufacturers design to pass and with a larger safety margin than aftermarket). They also have to consider selling the cars. While the performance minded would probably welcome the louder exhaust, the mass market Nissan has to sell to probably would not.

These type of considerations in construction rob power. Do I think the Borla will add 10whp? Hell, I don't know... that's why I'm going to get my car dyno-ed, but I'd bet the cost of second exhaust system of your choice that I'll gain something... and there's no doubting the sound is better!

 

I won't take that bet, I'm certain you will have gains. And, yeah, the Borla sounds terrific. Anxiously awaiting your dynos.

 

What do you mean by "problems". If you are saying that since the stock Z is so finely tuned, we won't get much gain from FI, I think that is a false statement.




How can you expect anyone to take these opinions seriously without quoting a source?

 

What I was told is that the car is tuned about as well as Nissan was able and still keep the car reliable. FI will likely cause detonation and reliability problems. Sure, slap on a bolt on FI and you will get loads of gain. But, for how long before problems develop?

I'm not asking anyone to take these opinions seriously. Like I said, believe it or not. For what it's worth, I'm usually careful about what I post and about the opinions I rely upon. For example, I have little doubt Zaino is a good product from your posts and I would have no problem recommending Zaino because I think I can rely upon your opinion. All I can say is, my source knows.

So how many coats of Zaino now?

 

My Borla should be in my hands late next week -- shipped yesterday (fingers crossed). I've got a baseline dyno scheduled for a week from today (28th). Complete the install, reset the ECU and do a second dyno on Monday or Tuesday (30th or 1st). I'll post as soon as I have the nums, and presuming everything goes according to THE plan. The more data for comparison the better!

 

But you all KNOW that my source is just ME. I'm not some secret know it all without a name or title.

I've never pretended to be a detailing expert and I have found it pretty amusing that people actually ask me for car detailing advice. But at least they know it's just MY opinion.

I go to school for 25 years to learn how to put busted up people back together and I get e-mails and PM's asking me what tire dressing they should use or if they should put Z-5 on before they put on Z-2! (you should by the way, but that is just MY opinion )

Oh yes, 32 layers of Zaino and holding!