Before I get too deep into my ApexI combo, and the boost solenoid and other wiring.. I have a quick question..

Does the EVO UTEC Actually have true closed loop boost control? Do you have to replace the solenoid with an aftermarket solenoid? And can you do the MAP/MAF translation and easily convert/remove the MAF Sensor..

Also, Since this plugs inline with the stock ECU (I think this may have been answered already) but are the RPM and FUEL CUT limits disabled, or will you still have to flash the ECU to remove those?

The closed loop boost control is a deal breaker for me.. I'd much prefer to keep as many stock components stock and try not to drill holes or route any additional wiring into the engine compartment unless absolutely necessary...

I always attempt to make modifications to my car "reversable" in other words, anything I do needs to be able to be returned to stock fairly easily. (Not quickly, just easily)

 

I spotted another answer about the stock boost solenoid in your other thread.. although I'd like to get a better understanding of what its capabilities and requirements are in order to continue using the stock solenoid.. Can you get stable closed loop boost control, admittedly the bleedoff would be slow, but if you remove the restricter pill, can you increase the speed of its response.. though I'm only interested in the range of 18-21psi through redline..

 

The UTEC does indeed have closed loop boost control with the use of an add on MAP sensor. We have two methods of allowing the boost control solenoid to flow a little bit more when run at high duty cycles.

1. We give you an adjustable bleeder valve that installs in the factory boost control solenoid (FBC) input line to supplement it’s ability to bleed off pressure. This raises your base boost pressure before the FBC starts doing its thing.
2. We give you 4mm vacuum line to replace the FBC inlet line (which has the boost pill in it) to allow the FBC some additional headroom.

Given these two additions, you should be able to achieve your desired boost pressures and keep the FBC duty cycles in check to the point that the UTEC closed loop boost system will work as designed.

My coworker Jermaine is going to be posting some screenshots of the boost control map in a few minutes.

 

At this time the UTEC software does not support the removal of fuel cut. It will in the future and that will be a free upgrade to our users.

IIRC dynoflash has offered to flash our UTEC customers ECU's for $79 to remove the rev-limits and fuel cut.

 

Hello Guys,

To answer your question, yes we do have closed loop boost control, which is available with our optional MAP Sensor. Used in conjunction with our ABC pictured below you will have a wide range of boost adjustment.


You can switch from Open loop to Closed loop boost control in the Special Constants parameters menu. You also have full control of the gain on the boost solenoid as well.


Here is the boost map where the values can be adjusted on a 250 rpms basis and 11 tps locations.


Jermaine~
www.turboxs.com

 

Ok.. so the bleeder and hoses comes with the UTEC, but the MAP sensor is optional.. Will the ApexI MAP sensor work?

 

No, the apex map sensor will not work. Our outputs are only calibrated for the specific map sensor we used in developement of our unit.

The abc is included with the utec.

Jermaine~
www.turboxs.com

 

Nice quick answer.. Thanks.. One more stupid question, I noticed Injector Scaling was a "Future feature" what do I do if I already have overized injectors and need to adjust for them?

 

If you want to make an adjustment for larger injectors, you can just use larger negative correction values..

Jermaine~
www.turboxs.com

 

I ask alot of questions.. With the MAP Sensor option, can the MAF sensor be disconnected and removed completely? If so, how much is the map sensor?

 

That depends highly on which MAP sensor you decide to go with. Don't forget you'll need an IAT with it as well, then you can go speed density.

 

Well, you guys have to post part #'s and how-to's and I'll certainly try it..

 

Speed density is not a feature the current UTEC software supports.

-Nathan
www.turboxs.com

 

I'm the FOOL! I swear, when I made that post, I thought I was in the AEM forum. Totally my mistake!!

 

I was wondering.. hehe.. I thought I read that it might be supported in the future though.. which would be cool..