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Old 09-27-2005, 02:42 PM   #1
Christian.
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Default Cobb Tuning has released a STU specific map tuned using Sunoco GT 100, street legal..

fuel. This has been requested for some time and this map has finally been released. PLEASE READ THE MAP NOTES for this map...it is very improtant that you understand how this map had to be tuned.
http://cobbtuning.com/sti/accessport/index.html

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Christian.
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Old 09-27-2005, 02:49 PM   #2
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Read the map notes. The map is NOT STU legal as it changes boost.

Not suprising, more useless crap from Cobb. I wouldn't trust any of their crap as far as I could throw it.

-Tom
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Old 09-27-2005, 03:02 PM   #3
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Are you reffering to the removal of the speed limiter? Or is there somthing else in there where it says they change boost?
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Old 09-27-2005, 03:12 PM   #4
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Sounds like they changed wastegate duty cycle to change boost curve at high rpms...
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Old 09-27-2005, 03:18 PM   #5
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Quote:
Originally Posted by ChrisDP
Sounds like they changed wastegate duty cycle to change boost curve at high rpms...
That's how I read it too.
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Old 09-27-2005, 03:20 PM   #6
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Can this map be used with any 100+oct fuel, or only Sunoco?
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Old 09-27-2005, 03:21 PM   #7
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Nope.. negative ghost rider.... not STU legal.

~ Miranda
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Old 09-27-2005, 03:21 PM   #8
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They said that you might get boost creep with a less restrictive exhaust and the STOCK ECUs wastegate cycles which are not modified with this map...

They specifically said that they did not modify the stock boost maps at all.
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Old 09-27-2005, 03:25 PM   #9
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Please point to the part of the map notes that are not STU legal.
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Old 09-27-2005, 03:27 PM   #10
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Here are the notes. Point out the boost alterations:

I would like to explain what we have seen with the factory boost control settings on the stock STis (2004-2005). The OEM ECU raises the Wastegate Duty Cycle (WGDC) percentage approximately 40% as RPM increases from 2400 to 5600 RPM. The factory does this in an effort to compensate for the restrictive exhaust system found on the stock vehicle. They are trying to maintain boost at higher RPM while running with the restrictive, stock exhaust system. If a less restrictive exhaust system is installed on an otherwise stock vehicle, then the increasing WGDC will make boost rise as RPM increases on the stock boost table settings. This is also known as boost creep. It is highly possible that fuel cut can be reached in 4th, 5th, or 6th gears with the high boost levels seen after installing a turbo-back exhaust system.


1.15 This map has been updated to the latest ProTUNER file format, map file version v1.15. This map was originally created using a stage2 map with stock boost, wastegate, and turbo table settings so that boost is not modified from stock settings and the map stays within the SCCA STU rules. New ProTUNER file format. We spent extensive time testing this map so that we could make more power through timing, fuel, and AVCS table modifications. This map was tuned to provide a performance tune
for the SCCA STU classification for the STi. Only Sunoco GT 100, street legal fuel should be used with this map. This map has a much more aggressive timing curve and leaner fuel curve to take advantage of the higher quality Sunoco GT 100 fuel, please see Dyno Graph A.

1.05 - Minor smoothing of fuel and timing maps for improved drivability. Added
additional CEL defeats related to the use of cat-less exhaust systems.
1.04 - Skipped. Syncing version numbers to reduce confusion.
1.03 - Removed P0139 Check engine light.
1.02 - Fixed error with speed limiter. Moved Speed Limits A from 147 mph to 311; Speed Limits B from 150 mph to 311 mph; Speed Limits C from 147 mph to 309 mph. Removed P0420 check engine light.
1.01 - Revised fuel table to compensate for initial testing at altitude versus
additional testing at sea level. Verified accuracy of altitude compensations in base mapping.
1.00 - Original Mapping. Adjusted Fuel, Timing, AVCS, closed loop control, knock corrections, and base programming logic.

Base Map vs. Realtime Map Differences -
This is only a Realtime map. The stage2 base mapping contains some additional logic for improved performance and is HIGHLY recommended to be used if you plan on operating at a Stage2 or STU level.

Here is a list of tables (parameters) that may change when you select a Realtime map
with your AccessPORT:
AVCS Intake Cam Advance
Closed Loop Modified Load
Closed Loop TPS
Fuel Injector Parameters (size and latency)
Intake Calibration (MAF Sensor)
Primary Fuel
Dynamic Advance (the ignition self-tuning table or what is sometimes referred to as a Knock Correction table)
Primary Ignition
Rev Limits
Things like CELs and some important Closed Loop tables are not changed with Realtime maps. This is why we highly recommend you running the Stage Base Map that best matches your car's modification. Running the Stock Mode Base Map with a Stage Realtime map over it will get you some of the improvements




Additional Notes:
For use with a stock turbo, stock injectors, stock intake or Cobb Tuning SF Intake,and a TURBOBACK exhaust system. These table changes include a very aggressive timingcurve under medium and high loads (WOT) to take advantage of the higher octane fuel,please see Dyno Graph A. Due to timing changes its recommended to only use this map with a minimum of Sunoco GT 100 octane fuel. IN OTHER WORDS, THIS MAP IS VERY AGGRESSIVE IN TERMS OF BOOST RISING WITH RPM, THE IGNITION CURVE BEING MUCH MORE
AGGRESSIVE THAN STAGE2, AND RUNNING THE MOTOR LEANER TO TAKE ADVANTAGE OF THE QUALITIES OF GT 100 RACE GAS. MUST USE FACTORY INTAKE OR COBB TUNING SF INTAKE. NO OTHER AFTERMARKET INTAKES ARE CERTIFIED COMPATIBLE WITH THIS MAPPING. This map will only be a Realtime map.
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Old 09-27-2005, 03:31 PM   #11
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Quote:
IN OTHER WORDS, THIS MAP IS VERY AGGRESSIVE IN TERMS OF BOOST RISING WITH RPM
Close to the bottom. Thats why they have such a fat torque curve.

-Tom
Yes, Cobb sucks, just look at the "conemasher" or whatever POS they put out
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Old 09-27-2005, 03:33 PM   #12
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The wording is extremely vague, at the very least...

Boost does not continually rise with RPM.. not on a stock map anyway.

~ Miranda
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Old 09-27-2005, 03:33 PM   #13
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That is refering to the stock wastegate map when paired to a free flowing exhaust.
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Old 09-27-2005, 03:34 PM   #14
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I've never seen an STi with a freeflowing exhaust and legal engine management that actually boost creeped on an autocross course.
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Old 09-27-2005, 03:35 PM   #15
rankink
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But have they changed the actual factory boost curve, or does boost rise quicker due to additional mods and the more advanced fuel & timing. Because in the rest of the notes it seems to say they have not altered the factory curve. Just needs to be clarified one way or another.
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Old 09-27-2005, 03:36 PM   #16
rex n effect
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Quote:
Originally Posted by Midnight_Gold
I've never seen an STi with a freeflowing exhaust and legal engine management that actually boost creeped on an autocross course.
That's why they say it MIGHT happen in 4th, 5th, and 6th gears. Do you autocross in 4th gear?
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Old 09-27-2005, 03:36 PM   #17
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Quote:
Originally Posted by afpdl
That is refering to the stock wastegate map when paired to a free flowing exhaust.
No its not. Boost doesn't rise much faster with a free flowing exhaust if you keep the stock wastegate maps.

If I were still in STX or STU I would sure do a protest on the cobb crap at a national event.

-Tom
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Old 09-27-2005, 03:36 PM   #18
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I think you'd have to take it and compare it to an ecutek'd map to see.. they should be somewhat similar at the very least...
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Old 09-27-2005, 03:38 PM   #19
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Quote:
Originally Posted by rex n effect
That's why they say it MIGHT happen in 4th, 5th, and 6th gears. Do you autocross in 4th gear?

If that's the case, then why do they emphasize it's an aggressive tune with ever rising boost levels?

x2
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Old 09-27-2005, 03:40 PM   #20
rex n effect
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Quote:
Originally Posted by trhoppe
Boost doesn't rise much faster with a free flowing exhaust if you keep the stock wastegate maps.
Then this map shouldn't be a problem. I think they might just be covering their asses by warning people that boost creep is indeed possible with an open exhaust on a stock STi. They specifically state that boost maps and wastegate duty remain UNCHANGED compared to the stock ECU. Do you think they're lying?
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Old 09-27-2005, 03:46 PM   #21
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Quote:
Originally Posted by rex n effect
Then this map shouldn't be a problem. I think they might just be covering their asses by warning people that boost creep is indeed possible with an open exhaust on a stock STi. They specifically state that boost maps and wastegate duty remain UNCHANGED compared to the stock ECU. Do you think they're lying?
Yes, I think they are full of crap, just like their other stuff. I don't think any of their STX or STU maps are legal But hey, you asked how I feel.

-Tom
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Old 09-27-2005, 03:50 PM   #22
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Quote:
Originally Posted by afpdl
That is refering to the stock wastegate map when paired to a free flowing exhaust.

This is about how I understand it. I read it twice, and maybe I need to read it again, but they are playing on the 'legal' rule of turboback exhaust and what the WGDC will do factory to compensate for the change from the otherwise stock vehicle, and, they are advancing timing and fuel to 'match' the 'boost creep' inherent with the TBE on an otherwise stock car.



Am I wrong?
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Old 09-27-2005, 03:52 PM   #23
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Quote:
Originally Posted by trhoppe
Boost doesn't rise much faster with a free flowing exhaust if you keep the stock wastegate maps.


-Tom
^^^ This is the question that is vital.
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Old 09-27-2005, 03:52 PM   #24
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Quote:
Originally Posted by trhoppe
Yes, I think they are full of crap, just like their other stuff. -Tom

Woohoo, something else that Tom and I agree about...that brings the total to 3. LOL
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Old 09-27-2005, 03:52 PM   #25
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I guess they really need to do a side by side comparison with each map compared to the stock map and post them on the site so you verify if any of the boost or wastegate duty cycle maps have changed.

At the least though this should be a good starting point for getting a car properly pro tuned or street tuned for 100 octane fuel and STU legal boost settings.

Nate
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