I wonder if there's some issue with the 05's and the UTEC? I feel the boost drop off fairly significantly with the stock ECU. It really peeters out up top, around 5500 on up. I'm hoping a cat-back and downpipe plus a retune will bring back the top end to what it should be.

 

lol lots to be learned. the temp and what not has a lot to do with it all also. and all evo drop power or feel like it at 5500rpm. i know what you all mean. but you not loseing power just torque go bye bye and hp goes up and up.

 

If your boost is very low suddenly, make sure its not a leak or the weather.. I doubt its your UTEC, but it could possibly be the map.. If you installed the Map sensor, and not make any other changes, then all you'll see is the boost in your logs, if you set the boost setting to closed loop, you'll have to redo the boost control map, otherwise you'll generally get wastegate pressure or 16psi max.. which will feel like you lost power because you did.. but its not the UTEC's fault. AFAIK the wiring on the 05 and earlier USDM Evo's is identical to the ECU and therefore shouldn't otherwise make any difference.

 

No MAP sensor as of yet...I guess I assumed the UTEC would just use the stock boost control if a MAP sensor wasn't attached. I definitely need to read a bit more on it's usage! I'm going to try and hook a boost gauge up this weekend and see what my boost levels do with the Stage I turboXS map. I may have a downpipe and cat-back on the car by then, but stock cat.

 

I noticed on my car that the switch one, stage 1 UTEC map without the ABC installed resulted in 16/17psi of boost.. much lower than "ECU" stock.. And after talking to the TurboXS guys, I think the boost map used on switch-0 (Stock mode) is the map on your switch-1 setting and not actually the ECU's desired action.

 

Sorry to be such a dud, but I'm not understanding what you are saying in the last sentence. Are you saying that map zero is NOT the "pass through" running off the stock ECU mode I thought it was and is in fact using the boost tables from position 1? On position 0 with the remote switch, car feels just like stock. If I go to position 1, it dies on top. I'm going to get the ABC on there, probably tomorrow. Having a cat-back installed at the moment and it's taking forever! Good price though (HKS Hi Power std.).

 

mr. stock did you get a dp as well. if not i dont see the point unless want it for the sound.

 

and position 0 is stock mode. and 1 is map one and so on. read the utec manual will tell ya there. and i need a abc humm there are others out there need to find a nice one. any note on that.

 

Mike, yeah I understand the different map settings. I've copied/pasted, saved to and from the UTEC, etc...

The downpipe (Apexi Gt spec 2.5" downpipe) was so I could weld on a bung for the tuner or my innovative wideband and not have to modify the stock downpipe if the car ever needs to go back to the service department. I also wanted a downpipe that would mate to the stock cat. Using a 3" downpipe and the stock cat would be a very bad move! I probably will see little, if any, performance gain with the downpipe and I was aware of that when I bought it. It's also the reason I didn't spend a whole lot of money on it!

 

i see what you mean but in other eyes its a waste of money. one can always but the bung behind a heat sheld they wont see. because why spend the money on somthing that is not going to do anything anyhow. i would just go get a 3in dp. and if want wait like a month or two. me and jack are going to work on a 05 stock tune with my car. im going to have a bung in the stock dp as well. and we will see what we can get out of it. a safe tune for all 05 stock. and then we will add exhasue and make a tune for that. and every little part and what not. make a little nice utec map pack. like a stage pack for your 05s out there. will be fun. and then blow up car for shiv and gigles. lol J/P

 

Not to confuse anyone.. But the MAP-0 is the stock passthrough.. But recently in a thread, TurboXS (Jermaine) stated that the boost control portion is used from Map-1, I'm not sure why, but its consistent with what I've seen on my car, and 2 other member cars. However, if you set MAP-1 boost settings to ECU, it functions as you would expect.. Weird eh? I usually use my "safest" map in the map-1 slot, which is my lowest boost setting also.. so it has never been an issue for me regardless.

 

Mike,
When you run a 3" downpipe into a 2.5" cat, you're probably doing more harm than good. I'm sure there's a bit more flow in a mandrel bend 2.5" downpipe than the stocker.

Jack, so if I go and set all the "75" settings to ECU, it'll function like the stock ECU would? I may just start tuning here on my own on the road.

Has anyone ever integrated the Innovative wideband into the UTEC? The Innovative 02's scale can be set through software and it's linear. The Tuner Lite's resolution, according to the manual, isn't that great. I'd rather have precise a/f ratios instead of tuning to a "rich" output reading on the tuner lite.

 

Oooh yeah, almost forgot...the HKS went on today. Too loud for my taste. Seems to be a bit more power but the ECU probably compensates. Anyone want a HKS Hi-Power with 130 miles on it?

 

Yes... It should.. and I had the same problem, with the settings at 75, without the ABC installed and turned 1.5 to 2 turns out, I was getting 16psi of boost approx and the car felt WEAK..

You can't really integrate any other wideband to the UTEC, basically the Tuner and UTEC communicate through the serial port, and the tuner basically overlays the additional data into the UTEC dash display or loggers..

TurboXS *SHOULD" utilize one of the spare inputs on the UTEC to allow any wideband analog 5v input (and have a calibration setting) instead.. In addition to being able to use the wideband signal within the UTEC itself and not require a serial connection to it (which I actually find annoying) you can then use closed loop AFR Targets instead of maps for fuel control.. Which would basically give you the ability to continually autotune..

However I'm uncertain the UTEC has a powerful enough microprocessor to handle that sort of feature..

 

Gotcha...thanks for the good info! I'll report back when I get the ABC installed.