EDIT: This is probably in the wrong forum, sorry... Mods please move to proper forum.

Hey guys, I was just looking for some input and some opinions. I just bought this car (03 Evo) last week and I guess it dyno'd 330whp on 18 psi at TurboTrix's Dynojet awd dyno a while ago. On 20-21 psi, it made 353whp. This was on a tune Turbotrix did a little while ago.

So... I dyno'd it yesterday on my local dyno which is a Dyno Dynamics. On the same tune that it had in the car, it was really out of whack. The a/f was a lot leaner than it should've been(12.5-12.9) at WOT. The idle was ultra rich (10-7-10.9) and the part throttle was so lean it sputtered like crazy. With those conditions, it made 256awhp.

After a couple hours of re-doing everything pretty much, it made about 260whp on 17 psi and 289.1whp on 21psi falling to 17psi by redline. Now before anyone says anything, I know the Dyno Dynamics reads a good % lower so I am not that disappointed in the numbers. I was just expecting at least 300awhp if it did make 350whp on a dynojet.

mods are as follows:
stock turbo
HKS 280s, set at 0(no cam gears)
3" turboback
BR Deluxe FMIC w/ Tial
750cc injectors
walbro 255lph HP
AEM EMS

The tune was a conservative 11.0-11.1 across the board on all boost levels.

289awhp on a Dyno Dynamics compared to a 350awhp on a Dynojet is kinda a big-ger difference. With like a 20% correction, it still only makes it 346whp which is close, but I know the general correction is about 13-15%? I guess I don't know what I'm asking, I'm just kinda meh about it and wanted to say something about the awkwardness of it.

Dont flame me, but before i goto the track, I'd like to know what a 290whp DynoDynamics approximately traps in the 1/4? Anyone who would like to give their positive .02, go for it. If you just wanna flame or talk trash, please skip the thread. Thanks in advance.

 

warrtalon has the vid of him running a 12.0 with 294 awhp on a dyno jet.....i dont recall his trap speed though

 

Holy crap, 12.5-12.9:1 at WOT? What RPM is that at? If I were you I wouldn't even consider taking your car to the track until you fix the tune!

Your car is almost identical to what mine was a few months ago, and I yielded similar results on the dyno (Mustang Dyno) - a low, low 266whp, pump gas 22psi. I was running a 10.9 AFR at WOT though up to redline. For a good, smooth idle you should be seeing around 13.1-13.9:1 AFR.

Sounds to me like something is up with your tune. I'd get it checked out by someone experienced with AEM and don't take your car to the track until you're sure everything checks out.

 

I don't think you read the whole post. It was re-tuned to beyond safe levels. It runs awesome now. My friend/DB performance locally here is great with the AEM and has always touched all my AEM cars and none have ever had any problems while making great power.

 

Did the car feel faster after the TT tune or the new tune? Who cares about numbers. As long as the car is running safe and you're able to put down numbers at the track that correspond to your mods you should be good to go.

 

The new tune is 1000x better. I know the tuner and we took time to go through the map. The tune that was in there was terrible. It was just like someone threw it together to just get it driving and to get the car from one place to another. There've been base maps that would drive better.

As far as numbers go, I'm not concerned. I just want to bench race a little bit before I get to the track soon here.

 

So are you going to be at Rockfalls may 6th?

 

I have to agree with taking your time. I dont care if you're God himself. It's impossible to dial in a car with 2 or 3 pulls. Ive been tuned by TT twice now and got 2 and 3 pulls respectively each time. I found after installing a WB that the 1st tune was extremely lean. So much in fact that they agreed to tune the car again "at no charge" -direct quote. After the 2nd tune they stuck me with a $150 bill for dyno time. I guess no charge means something different in their world.

 

Interesting... coincidence? I guess this car is lucky that the guy I bought it from (Kwman) was very good to it and didn't beat on it much if at all hard. I hate to see good guys get the short end of a stick.

 

Forget about the dyno numbers. Too bad you weren't able to take it to the track before and after the retune. That way you could have seen in real world circumstances how the car is performing and if your expecations were met or not.

As long as you car is running safe and it is making good numbers performance wise, you are in good shape. Don't rely too much on those dynos.

 

do you know how long was spent on the original tune to dial in the car? In my experience TT doesn't spend too long on the car...my car was supposedly "tuned" in 2 pulls.

And my wideband can't even get a reading because it goes richer than 11.0 as soon as boost hits I guess it's better to have a richer tune than a leaner one but I don't want power being left on the table...

 

I believe I was told that they were there for at least a couple hours... possibly because there were problems? Whatever "tuning" was done... it pretty much seems like a base map tweaked with like some quick guessing and checking to see if it was good enough to drive off. I know Kwman was just passing through town for the day, so I assume it was at least a few hours. I'll let him chime in if he wants to make it clearer on what happened.

The thing was, the tune wasn't rich, it was lean as hell at WOT... and rich at idle(fouled plugs idling)... exactly what none of us want.

 

Yikes!!! This is horrible. Only 2-3 pulls to tune a car. My tuner did 31 pulls on my Evo, 26 of them to tune for the crappy 91 octane that we have in CA. The 100 octane map was based on the 91 octane map only slightly more aggressive. And I piad $165 per hour for the dyno time. If you can make it to CA Tuning Tech is the place to go.

 

One difference worthy of note is the fact that a Dynojet cannot duplicate real world loading on a car, but a Dyno Dynamics dyno does just that. I'm not saying this is necessarily the sole reason for the difference (although depending on the tune, it could be), but tuning with an inertia dyno provides a more accurate reflection of what you're going to experience when you drive it.

 

Ahh, yeah I was a bit confused when I first read it. I was wondering why you had two different AFRs listed there. 8:30 is too early for me to think straight I guess. My fault!

That does seem like low power for those mods though, same as my car. Have you checked for boost leaks? I had a bad one that I believe was the main cause of my low numbers.

Anyway, take that Evo to the track and see what she'll do! I'd like to see. Best of luck!

-D