the other car that harmon tuned was running 91 too...

 

Yeah, and going by their post they made 288whp stock with just a flash (which isn't too far off from this guys). Then when they added their full turboback, they went over 300whp. A cat-back alone isn't going to do much compared to a full 3" turboback.

 

good point and the 91 pisswater isn't helping

 

did you get a baseline before getting tuned?

 

the point is that his tuned IX with a catback made LESS power than another tuned IX with stock exhaust....so his numbers are a little low imo.

 

I guess thats true to a certain extent, but you got to remember that dyno's read differently everyday thanks to weather changes as well as other factors. I still think those are pretty good numbers for an IX and should prove to be a fun daily driver (I would know, my IX is flashed as well and is the best thing I've done to it, but I haven't dyno'd).

 

Hey guys,

As always we baselined it before the tune. Efren's baseline numbers (catback and K&N only) were inline with Andy's baseline (bone stock). Whether that means Andy had a freak car OR catbacks alone don't do much - only more testing will show.



Honestly, I'm really happy with the gains. We're not tuning these things for dyno queen numbers - especially when they are this stock. Also, please don't forget this is on California 91 octane fuel - it's a different animal from good 93 pump found on the east coast.

Couple of interesting things:

70WHP Gain @ 7300RPM!
Big spool up from MIVEC tuning
Pulls to redline like crazy even w/ the stock cat
Ultra conservative A/F ratio and timing

Here is the other thread if you guys are interested: https://www.evolutionm.net/forums/sh...3&page=1&pp=15

Regards,

Dan

 

Dan - thanks for posting the data!

I also have a basically stock IX (MBC + flash) and have noticed an interesting trend ... there seems to be a rise in boost pressure around 4600-4800 RPMs on my car, another IX that belongs to my buddy and on the car tuned in this thread. I'm just curious as to your thoughts on this ... is it possibly boost creep? MIVEC related somehow? or just an anomaly?

Also, what is your general opinion on safe peak/redline boost pressure levels for the stock IX turbo with stock exhaust system?

 

Damn!! Sick!! So is it safe to say that the turbo in the IX is playing the big role for the extra 10-15whp compared to the 05's?

 

I'm going to ecutek flash soon and I hope it give me a big gain also.

 

Consensus is turbo backs are not doing as 'much' on the IX's vs. the VIII's after being tuned. My IX vs another IX same day at Vishnu put down 10whp more stock and 20whp more after the tune with the only difference being I had the TBE w/ HFC. Still a nice gain IMO.

 

yeah, 20 whp is nothing to sneeze at ... isn't that about in line with the gains on the VIII for a TBE?

The thing is, when making such comparisons, you really have to look at the boost pressure since that's where most of the gains are coming from ... you should be able to safely run a bit more boost with the TBE since there will be less backpressure. However, if you are comparing against someone who is already running a high boost pressure without the TBE, you might not see the huge difference, although the car with the TBE is probably running with a safer state of tune ... my opinion ...

 

Here is my Ecutek tuned IX MR. Not sure what this would translate on Harmans Dynojet.

 

beautiful gains ... looks to be almost 50 peak whp and even more torque ...

But wow ... look at the baseline ... that's exactly what everyone is talking about with the stock untuned ECU somehow pulling back boost/timing/cam advance (not sure which?! or combination thereof?) on spoolup when it detects the extra airflow of the modified exhaust ... that is really wild how the torque just takes a nosedive around 3800 RPMs and then recovers a bit. Clearly that is unnatural and must be a result of triggering some failsafe mechanisms in the ECU. The IX ECU is definitely a complex animal ...

 

^^^the IX ecu seems to pull timing pretty aggressively on 91. just for fun last week, i mixed 1/2 tank of 100 with 1/2 tank 91. the difference was very noticeable...the car felt much stronger at high rpm.