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Old 04-27-2005, 09:22 AM   #1
xcntrk75
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Default Faster without UTEC?

First off I realize this is a very n00b type of question, but if those with the UTEC knowledge and experience can please respond, I would appreciate it.

I just picked up a used UTEC (rev-5) and flashed it to the latest 4.2c software. I got everything installed and working accordingly. My setup is compatible with the “generic” Stage-II map (i.e. up/down pipes, TBE, intake) however when I load up this map and adjust the ABC accordingly, the car’s simply not that fast. In fact, it’s actually faster and performs better if I drop back down to Map-0 (and readjust the ABC accordingly)! Also while running the Stage-II map, it surges a little while under heavy throttle.

I realize that the Stage-II map is strictly a generic baseline to improve from, but shouldn’t it at least provide *some* improvement above stock?
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Old 04-27-2005, 09:57 AM   #2
ride5000
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what kind of car is it installed in? any mods?
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Old 04-27-2005, 10:52 AM   #3
one wicked wrx
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those base maps from turboxs are always on the rich side
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Old 04-27-2005, 11:07 AM   #4
xcntrk75
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Quote:
what kind of car is it installed in? any mods?
It’s running on an 05’ WRX EJ20 with an 02’ ECU and harness swapped into a 98’ Legacy

None of that really matters however, the important aspects affecting performance (and these MAP’s) are as follows:
  • ERZ catless up-pipe
  • ERZ catless down-pipe
  • 3” catless custom mid and axle-back to APEX N1 grapefruit shooter
  • Perrin short intake
  • TurboXS BOV
Aside from the intake (which could have an affect), my setup is very in-line with the generic Stage-II requirements. I’ve tried both “Octane Challenged” and the regular Stage-II and each spools very quickly (as opposed to stock) but overall runs like piss.

I guess my only option is to have it tuned accordingly(?). This is something I plan on doing however I just assumed the default generic MAP would provide some level of performance gain over stock, which it’s not.

A UTEC either works or doesn’t right? Could the hardware be causing problems?
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Old 04-27-2005, 01:09 PM   #5
SlideWRX
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What boost were you running, stock and not-stock?

Tom
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Old 04-27-2005, 01:23 PM   #6
Gethin
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The basemaps are designed for the stock intake and BOV. An intake will screw with the MAF readings and the basemap will not be happy.

The basemaps are designed for 93 octane gas. If you are running anything lower like 91 then you need to modify the maps.

The boost map needs to be tuned, the stock map just inserts 300 in each location. This needs to be tuned so you reach the target boost vs RPM with the assistance of the ABC if required which is explained in the manual.

You need to use the constant parameters file for stage 2 also with the 4.2c and the new basemaps from TurboXS site.

My car took time to settle down after installing the UTEC as after disconnecting the battery the IAM on the stock ECU needs time to relearn again, thus affecting the crossover transition from ECU to UTEC.
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Old 04-27-2005, 01:27 PM   #7
xcntrk75
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Quote:
What boost were you running, stock and not-stock?
Well even with the UTEC installed and on MAP-0, the boost is still regulated by the ABC which comes with the UTEC, right?

When running on MAP-0 (stock) I have to crank the ABC down (less-boost) about 2-full turns to dial in around 15.5psi otherwise it will go much higher

When running Stage-II, I turn the ABC out (more-boost) the 2-full turns to dial in the same, 15-16psi.

This is on a stock turbo and injectors running Shell V-power 93.
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Old 04-27-2005, 04:54 PM   #8
dosage0
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What makes the improvement is not the UTEC itself. Its the changes it makes. So, theoretically, if you put in a UTEC and it is running tamer values than what your ECU was running, it could perform worse. The fix is simple enough.. you just put in the correct values.

What makes the UTEC provide more power is the leaning of the fuel, the upping of boost, and the change in timing values.

One quick question that could solve all of this very easily. Did you set your ABC and set your boost? Boost IS NOT set with any of the UTEC base maps. You have to set it yourself.

Rob
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