Zack, look a little ways back in this thread....I quoted a link to another thread which compares TS to JWT ecu back to back dynos on the same day/same dyno...and he has AF graphs and everything...

 

This is pretty scary.



I logged some WOT timing data for the TS ecu with the knock sensor disconnected (verified code P0325)

I guess this is an un-advertised "feature" of my "special request" ecu.

Kind of turns my maxima into a winter WOT only car.

 

wow....your TS ecu with knock sensor disconnected is still putting out more advance then the regular TS ecu with a knock sensor working....!!!

did you every figure out why TS gave you timing far off of what you asked for? so are you gonna be forced to swap to your stock ecu in the summer? or are you going to send it back to TS....showing them that they gave you way too much timing more than you wanted....

 

so I finally picked up my ecu from TS and installed it (I was really lazy for a while)...and my auterra confirmed my butt dyno suspicions all along...stock timing...this is really starting to **** me off!!!

here is the graph...



all runs were done 20 min apart so elevation and weather are the same (done in 3rd gear (2 runs with each ecu))!
almost appears as if stock is actually better...lol

 

Michael - I added the TS timing data from your graph to mine for comparison.
Are you logging more than just RPM and TIMING? For a third gear run, you have pretty large changes in rpm between data points.



Feel free to send the url to Brian.

Try unplugging your knock sensor and see if it drops your timing down to a "safe" level (black data set)

When you go FI, what are you using for engine control? (stock, TS, JWT or standalone)

 

when I go FI I am leaning towards JWT...can't deal with this TS crap...even if they are fast and close to where I live...can't afford to give them a timing and then drive out of the lot with a lot higher than it's supposed to be such as what happened in your case and blow my engine! atleast with the JWT they have a S/C program...

although TS will let me put in what timing and AFR I want, they don't have a raised rev limiter, and they might now put it in the way I want...

but this my timing is stock crap was not in my head like they keep saying...they look at me like I am crazy...when I am there...I have always maintained that I feel no difference between stock and their ecu and now I have the #'s to prove it and they still don't believe me...they still maintain that the ecu "appears to be correctly modified" and they "verified their timing and AFR maps to be on there"

if I go back there this time, it will be my 4th time out there....the 1st three times were to get the rev limiter worked on...and I sent the excel worksheet to Brian in an email last night...and no response...as of yet...

here's where the real problem comes in...if they don't fix this or give me a refund, I can't sell this ecu to any maxima member here...and I already have one guy wanting it when I go FI...I could have fetched a good penny for it to being that it is supposedly modified!

 

so looking back at my dyno graphs...the A/F TS graphs are there as compared to another org members past dyno with the TS ecu...however, the IG timing is still stock...can't figure out why...this has to be a programming issue...I have a brand new knock sensor and harness and always run 91 octane...I would think most of the performance increase from these ecu's is from the extra timing rather than the slightly more lean AFR's...

 

To anyone with 97+ Maximas using the 95-96 ECU+ obd II scanner of any type. Can you get readings from the MAP/Boost sensor? With my JWT ECU the Auterra shows the reading at 3hg (or whatever number) and stays fixed but when I reinstalled my 97 ECU I can get a reading on the manifold pressure, because the number fluctuates.

 

96 TS ecu in 98
8-9 in-Hg @ idle
30 in-Hg @ WOT

 

hmm.. Maybe there is something wrong with my ECU.

If you still need MAF data I've done several data runs to provide. I did a few with my eBay CAI and K&N filter and runs with my stock airbox + Amsoil 2-Stage filter and the data was pretty much identical between the 2 setups, except the stock airbox setup appears to be flowing just a tiny bit (VERY tiny) more air in the top end. I cannot upload info to my work computer but I will do so later at home. I am sticking with the stock intake box since its a lot quieter and "proven" to flow just as well if not a bit better than the CAI during 3rd gear runs from 2500 till 7200RPMs

Having the Auterra PDA scanner is awesome. No need to guess/rely on butt-dyno. The data is right there before the user's eyes.

 

I would be interested to see the MAF vs RPM data for someone with an MEVI and extended rev limiter.

I have been experimenting a little to try and figure out why my timing is so far advanced with the modified TS ecu. I have found that the TS WOT timing map is only RPM dependent and is not a function of MAF.

The stock ECU WOT timing map is both a function of RPM and MAF. I am not FI, so I could not substantially increase air flow. Therefore I decided to restrict it, to see the effect on timing. I was able to get 33 degrees of advance at 6.4K compared to 24 degrees with an un-restricted intake.

The PDA OBD-II scanner is a useful tool, although I wish it could output injector pulse width and knock sensor voltage. I have been driving around for the past few weeks with my DVM wired into the ecu harness to monitor knock sensor voltage.

 

hey ken, how's the 5th gen tranny?

the auterra has payed for itself! I would have never really known that my TS ecu was running stock timing if weren't for that great program!!!

 

NA or boosted or does it matter to you? I have it for boosted.

 

edited due to data collecting error on my part that may be misleading.

 

Tranny is awesome. Shifting feels more direct. I can feel every detent after each shift, and I like how the shifter sits back a bit (gives me about 1 cm more space between the shifter than the shifter trim piece). What do you expect from a tranny used for only 10k or so miles?

 

VeeQueue - Your MAF data sets have an RPM offset. Whenever you plot data from the Auterra, you have to correct the RPM values for the fact that your MAF sample and RPM sample are not obtained at the same time. The more parameters you sample, the larger the offset becomes. If you are logging just RPM and MAF, the RPM at which the MAF sample is taken is approximately halfway between the RPM samples on either side of any given MAF value. The sample numbers are included in the .csv files so you can see the ordering in which the sampling was done.

I contacted Auterra and asked if they would be including a sample time stamp in a future version of their software. This would make data sampling corrections more accurate. They said that they will consider it.


Stephen Max - I plan on going the All Motor route so I am looking for NA data for direct comparison. Thanks for the offer though.

 

Ok I deleted the contents of my last post so it will not mislead people with skewed info. Later today I will sample RPM + MAF only and send you the .csv file via email and let you tinker with it

 

dharrington@nordockinc.com

 

ken, brian finally broke down and said he would re-mod my ecu...so I sent it in a few days ago....we'll see what happens...

and this time before I swap it back in, I will take every precaution like we talked about (sshhhhhh)...although a nissan master tech assured me they never do it when they get cars in for service and never have had a problem...

 

You're going to end up with eng92's most recent timing curve I still need to do some runs with my TS ecu. I wonder if I'm going to have the same stock-like timing like you guys did.

I'd take those precautions because it is even laid out in the FSM. Better safe than sorry.

 

VeeQueue - Do you know the approximate conditions that the data you sent me was carried out under? (eg. temp, elevation, rel hum., baro)?

I was going to correct both our MAF numbers to standard conditions for a fair comparison.

My -8 deg F air is a little denser than yours.

Also, what is your MEVI switchover rpm?

 

elevation 85-100ft per my GPS
60 degrees F
41% hum
30.04 in baro

MEVI switchover 5200RPM