i8acobra

iTrader: (6)

Well, I got my car on the dyno yesterday and had my roommate do some tuning. First, gotta do the credits... Tuning done by Jeremy Wolf. Dyno was a Mustang dyno provided by Doug at Doug's Dynopower (The DSM Specialist) in Henderson NV. Now, on to the numbers. First chart is before and after in 4th gear. Tuning was done in 4th gear to avoid running at 140mph+ on the dyno. Tuning was done on a Mustang eddy-current dyno, which is a load-based dyno. Power mods on the car are:

AEM CAI
APS plenum
UR pulleys
DC Sports headers
Ultimate Racing cats
Borla cat-back
Turbo XS UTEC



First, I'd like to preface by saying that this is an '06 with the Rev-Up motor. I don't have any experience with the UTEC prior to now, so I don't know if this is a common problem, but the ECU seemed to be fighting the UTEC. Just when we thought the A:F ratio was good, a new lean spike would appear somewhere else. We also couldn't get the ECU to accept the timing as programmed. It's possible the ECU was cutting back the timing due to high IAT's. Ambient was 92 degrees. The UTEC is also very sensitive to minor changes. Many of the changes to the fuel trims were made in 0.1% increments. I'm going to get the UTEC MAP sensor in the next week or so and see if it's any easier to tune in Speed-Density mode.

As you can see, power went from 249 to 263 and peak TQ actually dropped from 231 to 229. TQ was increased consistently above 5200rpm though.

This graph is 5th gear, before and after tuning:



This is my "internet *****" best 5th gear pull (281HP 237TQ):



Next step is to install the JWT clutch and flywheel. Then I'll get the MAP sensor and map selector switch, install them and get re-tuned.

Wired 24/7

iTrader: (2)

Looks like some decent results from tuning. I would still be interested in what it does with the 06 stock intake over the CAI, which most people are saying stock makes the most power on the dyno.

i8acobra

iTrader: (6)

The AEM makes at least the same as stock, if not more. I've been in AEM's factory and seen their R&D. If their inatke doesn't make power, they keep tweaking it until it does. They have their own dyno in-house.

chris'smax

iTrader: (5)

Not to bust your bubble but it has been track proven and dyno proven that the aem does loose power. Great numbers though. I am going to get my utec tuned as soon as school is over next week.

BTW what AFR did you tune for?

i8acobra

iTrader: (6)

Only seen one person post a dyno of lost power with an AEM. I'd need to see more evidence than that. I've installed AEM's on at least 2 dozen vehicles and have never seen any loss of power. Best gain I saw was 12whp on an '01 Tiburon (12whp = 11% increase). Worst I saw 3whp on a '04 Jeep Wrangler.

Was tuning for 12.5:1 but we were having trouble with the ECU fighting the UTEC. Gonna try re-tuning is speed-density mode next week.
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My bad... had the wrong first dyno chart up there. The baseline was 249HP in 4th and 277hp in 5th. I don't have a stock baseline. My baseline is with the parts installed, but not tuned.

Additional info the the tech-heads:

Timing was around 24 to 27 degrees total. UTEC is set for 29, but the ECU was pulling timing due to high IAT's. Coolant was at 77-78 C (171-173 F) and ambient was 92-94 degrees F.

chris'smax

iTrader: (5)

Yea that is a hot temp to tunning in. The most interesting peice of evidence i have seen was audiblemayhem's track test. I believe by switching from the aem cai to the stock box he gained over 1.5mph in his trap speed. This switch was done in between runs.

I think you could squeeze more out of her by tunning for a 13.1 afr. Might want to give it a try when you switch to the map sensor

chris'smax

iTrader: (5)

so 277hp to the wheels before tunning and 281whp after tunning when dynoing in 5th gear? That is great news if i am reading everything correctly. I was wanting to get a around 280 whp with my setup.

i8acobra

iTrader: (6)

Not with 91 octane, 100+ degree temps and the amount of timing I'm running.

Yes. 277whp is with all of my parts but not tuned. Keep in mind, there's still a few ponies left in her. The 281whp is with an 11.8:1 a:f ratio. I had a leaner tune in it, but I was picking up detonation. I need to pull a little timing out and get the MAP sensor installed before I lean it out a bit. Didn't finish it because it was getting late and the MAF sensor was not cooperating.

Alberto

iTrader: (14)

My AEM lost power on the dyno and was slower at the track, I proved this years ago. Look up my thread for more info. Decent results...btw 281whp on a Mustang dyno is BS, that dyno has been calibrated to keep people happy, normally they read low like DD's. Regardless you went in got a baseline and left with more, the job was done.

chris'smax

iTrader: (5)

+1 on what ^^^^^ said

The settings on the dyno have deff been altered. These number seem equal to what would be achieved on a Dyno Jet.

Either way your numebers are very nice.

Slick 6MT

iTrader: (13)

Not to mention the fact that Henderson is ~2,000 feet above sea level.

rocks

iTrader: (1)

If you run the utec in MAF mode the ecu will change its settings non stop. You will lose your tune every 3-4 days, at least thats what happend to me. My stock 06 ecu logged with cipher does 29 degrees of timing. With the utec i upped the timing to 34-36 degrees, with 12.8-13.3 a/f ratio.

gothchick

iTrader: (12)

That's a very good timing advance. AF is in the ballpark. Any knock events in the log?

Road Warrior

iTrader: (16)

what happens when you lose your tune...can you get it back?

i8acobra

iTrader: (6)

Search around the DSM forums about Doug's Dynopower. He's well known in the DSM community. It's funny you think the dyno was calibrated to read high. Most people complain about his numbers being low. My roommate's car make 514 rwhp on his dyno but runs 10.5 @ 130 mph. You gonna tell me his car really makes less than 514? As for him messing with the dyno to keep me happy... I was running the car and monitoring what was going on. We made almost 30 pulls.

bacalhau16

iTrader: (32)

Here goes another dyno debate but, 280+whp on a Z, on a mustang dyno, is pretty high. That would mean on a dynojet dyno, you would see very close to 300whp, and thats pretty hard to achieve in a Z without cams.

And its cool your roomate has a 514rwhp car, that runs 10.5 @ 130mph, but you never say what kinda car he has, and even still Im not sure if that would be relevant to your car and the power its making on that dyno. It does seem a little high.

i8acobra

iTrader: (6)

The point is, he's making 514 on that dyno, not on some other dyno. His car is an LS1 Camaro with similar weight and RWD. Point is, this dyno reads lower than a Dynojet, not the same as. We'll be having a dyno day there in the next couple of weeks. When we do, I'll re-run my car so we can compare to some stock numbers on that dyno. I'm guessing a stock '06 on this dyno will put down about 230 rwhp in 4th. Mine did 249 rwhp in 4th with all of my parts installed, but not tuned.


It's not that you actually "lose" your tune. The ECU compensates for your tune and tries to get back to it's pre-set a:f ratio. The ECU does this to compensate for variances in MAF sensor readings. If you tweak the MAF output (with an S-AFC or UTEC), the ECU assumes the MAF is dirty and reading incorrectly and tries to compensate. When you tune in speed-density mode with a MAP sensor, the UTEC actually takes direct control of the injectors so that the ECU can't compensate. I'm ordering my MAP sensor today.

2004Black350z

iTrader: (37)

+1 Alberto!! This is my350z.com not slowdsms.com. R&D on 350z(remember what we drive and what we know!!!) It has been shown to lose power!! And please dont talk about F-bodys lets stick 2 350zs!! Thank you Come again!!

rocks

iTrader: (1)

Just false knock. Sometimes 1 count would show up but not enough to worry about. But i sold my utec and am using something else now.
Once i even ran up too 38 degrees advance with no knock on the last tune i did with the utec.

i8acobra

iTrader: (6)

WTF are you talking about?

Damn trolls.