AEM EMS dyno tuning results

[ultimatuc]

this thing kicks ***! the car runs much better than it ever did with my 95 jwt.

this run was prolly the 10th pull we had to make considering most of the runs were just for driveability tuning.

12 psi (autometer gauges are garbage........ write that down )C16 just for peice of mind, and a good amount of timing.base timing at 20* and as boost rolls on, it progressively pulls timing back to 17* at full boost.stock cams11.5:1 a/f3.5 bar maphttp://www.nissanclub.com/foru...=4101this is on the altima btw.

Modified by ultimatuc at 6:10 PM 4/28/2005

[ultimatuc]

video:

please excuse the exhaust leak. ( wastegate to dp )

http://www.n20stang.com/rick/videos/dyno300.wmv

[TurboKA37]

those are some real nice numbers, do u have traction anymore?

[ultimatuc]

negative

first gear smokes em and second turns em. I'm going to get some 17in et radials if I can get the right size.

[Jeff240sx]

You have previous (JWT ecu) dyno numbers?-Jeff

[ultimatuc]

^yup.

225whp - 243tq

[:: orion ::]

^^^ But that's not from 12psi.

If so, you have (had) bigger problems than just a conservative ECU.

Any numbers from 12psi, before?

...

New setup and #s look good, though!

- Brian

[HolyShiznit]

Congrats on the numbers, however I find it very odd that all things being equal the JWT ecu made almost 100whp less. My dyno's have all been within 10-15 whp of any enthalpy tune or AEM tune at the same whp. Mod for mod at least.

[ultimatuc]

maybe I should have mentioned the old dynos were on a old clapped out engine w/ stock exhaust piping. I just installed a new engine w/ 4k miles. and 3in turbo back.

[Craving4Boost]

crazy power curve you got there on that dyno sheet.

must pull hard

[chandler]

now ive been asking all guys I know with the ems to ell the truth, and if say you have a little rough spot in second gear mild accell, can you just go in there and smooth it out by your self? or does it always have to be on the dyno? I know that full throttle runs and such should be on the dyno and you should have an egt sensor but thats another post all together

[fiznat]

ultimatuc, VERY nice numbers-- especially at that level of boost. The graph looks really nice... do you have any logs of your AFR and timing though the pulls? I'd be interested in seeing some of your logs in general, maybe we could trade and compare notes?

I know what you mean about the freakin autometer gauges... My cobalt gauge reads 26psi boost while the EMS sees 20-- what garbage. Let me know if you decide to swap them out for something thats actually accurate, I'd like to hear how that goes.

say you have a little rough spot in second gear mild accell, can you just go in there and smooth it out by your self? or does it always have to be on the dyno?

You can do it on the street, no problem at all. One of my favorite features of the EMS is its incredible logging capabilities. Everything the computer sees, every sensor voltage, timing point, AFR, load reference, whatever-- can all be logged and graphed out in any way you like. Finding a rough spot or whatever in 3rd would be absolutely cake. Not only would you be able to simply do a few logged 3rd gear pulls on the street with a laptop, but you can take the data, compile it, overlay it, and find out exactly what is causing your rough spot. ...Then just open up the map, find the cell or area of cells that is causing your problem, and fix it with just a few keystrokes. This is, of course, assuming the "rough spot" is some sort of tuning issue. It could easily be bad plugs, low fuel pressure, or any number of any other mechanical failures. Still, mechanical failures show themselves in the data logged by the EMS: a lean condition, a timing error, or voltage drop: all of it can be layed out so that even smaller errors present themselves clear as day.

You dont HAVE to have a dyno for anything with the EMS, it just makes things easier because you can artificially create load conditions that would be tough to do consistently on the street. The only thing you really need to use the EMS well is a laptop... and it doesnt even have to be a real nice one.

I should be a spokesman for AEM I swear... but seriously I just love this system so much I cant stop raving about it. Best thing I bought for my car, and I've bought a lot of stuff...

Modified by fiznat at 10:21 AM 5/4/2005
Modified by fiznat at 10:22 AM 5/4/2005

[DRIFTEADOR]

I've used an aem ems and i have to disagree. "fix it in a few keystrokes" and "[piece of] cake" don't describe my experience using it. yeah, youre right about datalogging. I loved the fact that it could datalog just about every signle engine parameter, and then some, but to an unexperienced tuner, figuring what is causing a problem is not cake at all. if you have the help of someone like ivan, sure, it's easy, but trying to figure out from scratch what the settings should be for even starting is a pain. there are some 20 tables before you can even start the engine, then another million to idle.

you can dowload the software "demo" version, which is really a full version, from aem to check out everything it can dohttp://www.aempower.com/ems/AEM%20DEMO.zip

[fiznat]

Oh, I dont mean to say that the software itself is easy, in fact I agree-- it is extremely complicated and there is lots and lots to learn with the whole setup. What I was referring to when I said that adjustments were "cake" was that the power is certainly at your fingertips with this system. The original question is if adjustments are possible using the EMS, to which my answer is sure: pretty much anything is possible with this software. Learning how exactly to do it, is of course another matter entirely.

That said, I dont think the EMS is OVERLY complicated considering what it does. Yes there are a million tables and an equal amount of settings, options, buttons, what have you... but I dont think it is unnecessarily cluttered or anything that that. Complexity sortof comes with the territory when you're looking for a computer that can do this kind of work....

And yes, it did help a LOT to have Ivan only a phone call away... phat ka-t saved my arse a number of times where I was stuck and didnt know what to do next

[WDRacing]

Autometer liquid filled gauges are very good, I've used them for years, had a 30 lb Auto gauge in at the same time as a Apexi 1.5 bar gauge and they read the same amount of boost.

I've never heard of them having a problem. Are you guys measuring from the same exact vacuum source? If not, try that. you'd be surprised what the difference can be.

Great friggin numbers though, what turbo are you running?

[DRIFTEADOR]

gotcha. i just don't want people to think its a easy diy job. if your tuner recommends it, go for it, but if you're doing it yourself make sure it's not your only means of transportation.

i never took my ems to a real tuner, which was probably my first mistake so fiz, if you don't mind me asking, how long did it take you guys to get it tuned?

ultimatuc, i just noticed you have what looks like a intercooler spray kit on your altima. have you by chance logged intake temps with and w/o it? co2 or n2o?

[fiznat]

gotcha. i just don't want people to think its a easy diy job. if your tuner recommends it, go for it, but if you're doing it yourself make sure it's not your only means of transportation.

i never took my ems to a real tuner, which was probably my first mistake so fiz, if you don't mind me asking, how long did it take you guys to get it tuned?

No I agree completely: trying out the EMS as your first experience with tuning is NOT a good idea. This was my first time doing something like this as well and let me tell you, opening up the AEM software for the first time blew my mind. There is a ton of termonology to learn (specific to AEM), and a lot of general tuning knowledge goes into it as well. Just to give other people an idea, the AEM comes with 3 manuals: one on general tuning practices which is 52 pages, another on how to use the software which is 200 pages, and a third on how to use the logging software which is another 30 pages. Quite a bit of reading just to get started.

It took a long time to tune my car because I asked the guy to help teach me the system as well. We spent just about 2 days on it, a total of something like 10 hours. I know this is way longer than your average tune (most experienced tuners say they can bang it out in just a few hours, or even a single hour)... but I wanted to spend some time on it and there were some mechanical issues that came up along the way as well. I'm glad I knew the guy and got a good deal on the dyno price! (cost of tuning/teaching for me was $500)

Sorry for the thread jacking ultimatuc, we should take this to another thread if people wanna discuss the AEM more

[ultimatuc]

thanks all.

fiznat. I have not had any time to do any logs yet. I'm going to have a friend drive tomorrow while I do some more driveability stuff. I have run into something really weird........every now and then, after a hard pull, I'll let the car go back to idle when it starts to stall and builds boost. (13psi) almost like its 2 stepping. I did one log when it was doing this, and it actually leaned out a little and pulled timing back to 10*. I have no idea what it could be right now. I should now more tomorrow after some more logging.

thanks again guys, and fiznat, I hope we can share some logs and tuning ideas when I've got things in order.

[ultimatuc]

WDRacing. unfortunately, I did not get any specs w/ my "netics kit. Its a T0304 but I have no specs on it. Next time bring the car down to Tucson I'll hit you up. maybe we could meet up and shoot the **** a little.

[ultimatuc]

hey fiznat. how much boost and timing are you running? fuel run?

thanks

[WDRacing]

Definitly man, grab a beer and whatnot.

[ultimatuc]

currently the fastest altima in the country.

I'll pull and post the logs before long.

[Fergus]

nice #'s

[Florida240sx]

Although were you sleeping when the light dropped?Pretty funny you're 2.4secs behind off the line and then beat him by .6secs

[Structure240sx]

great job, what kind of tires were you running? im jealous of that 60' in your fwd. i can hardly do better in my car from my horrible launches

[klattr1]

good time man. thats impressive!

[NX95240]

good #'s for sure