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Old 01-02-2005, 05:48 PM   #1
speedyshifter
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Default cobb accessport questions

anybody with the cobb accessport? can i get your opinion on those and are they good mods?
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Old 01-02-2005, 06:14 PM   #2
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check cobb forum, or search here.

there are plenty of reviews and opinions on the ap.

i have one, ran stg 1 with an uppipe for 25k miles, nice and smooth, safer than my stock 04 ecu.

just installed tbe and went stg 2.

Stage 2 rocks, lots or power. I like the accessport, depends what youre long term plans are, larger turbo, injectors, motor.....
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Old 01-02-2005, 06:27 PM   #3
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It's a safe mod, for sure. Right now it's only limits is the maps that Cobb puts out, so you got to stick with their mods(that is, you can't add a FMIC or an intake to certain maps and have it run efficiently).

The Accesstuner is supposed to come out at the 1st quarter of '05, so that's cool. Now if it actually does can be a different story. There's lots of talk about Cobb's stuff. Best way to get a good opinion is to do a search.

FWIW, I'm VERY happy with mine.



Mika(stage 2, 93 octane)
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Old 01-02-2005, 06:56 PM   #4
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I'm on my 3rd APd Suby now and I love 'em. Very reliable - not on the edge of destruction. Conservative tune that you don't have to monitor all of the time.

Not for a serious enthusiast, great for low maintenance daily driver.
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Old 01-02-2005, 08:58 PM   #5
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I just installed my Stage 1 AP and I love it..I have a 05 WRX and it made a very noticable change in acceleration and throttle responsiveness. I havent driven a full tank yet but I think its giving me a couple extra miles per gallon..
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Old 01-02-2005, 09:30 PM   #6
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On my '04 WRX sedan I gained 3-4mpg w/COBB Stage 2. It's gettin' all those horrible cats outa there!
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Old 01-02-2005, 09:32 PM   #7
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Please do a search on COBB AP either here or on cobb's website. This has been covered 1000's of times.
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Old 01-02-2005, 09:50 PM   #8
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Yes, this has been covered many times. For future reference, there are lots of threads already on this site with great info in them.


But to answer your question, I have a Cobb AccessPort and I love it. It was a good investment, IMO, since you pay for it once but can re-flash for free as you mod your car.

If you're a hardcore enthusiast though, and you like the idea of a custom tune, you might want to look elsewhere...
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Old 01-02-2005, 10:33 PM   #9
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Default Ap?

Yeah the AP is awesome, very reliable and user friendly. I have the Stage 2 and i am very happy with it 1/4 was a 13.5. Highly recommend if you dont want to have to do maintenance.
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Old 01-05-2005, 01:02 PM   #10
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Are you guys not worried about voiding your powertrain warrenty?

I would love to add the AP stage 1 to my car, but it seems like a big gamble. Waiting 5 years / 60K doesn't sound very fun either though.
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Old 01-05-2005, 02:14 PM   #11
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I've been at AP stg1 93 octane for about 6 months now, and I have a TBE to put on so I can get some stg 2 action. I can't wait.

As far as the warranty thing, you can flash it back to stock, or even just set the real-time map to stock and they will not even know it's there.
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Old 01-05-2005, 04:07 PM   #12
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I know you can change to realtime stock maps for dealer visits or uninstall, but do you think dealers could detect that the ecu has been remaped ? I guess how serious the powertrain warrenty repair is would determined how hard they look.
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Old 01-05-2005, 04:45 PM   #13
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Cobb has stated that they have the same equipment that a dealership does and it currently can't detect if an ecu is remapped with an accessport.

I went straight from stock to stg2 and absolutely love it, it's like having a new car - you'll be looking for excuses to drive again.
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Old 01-05-2005, 09:34 PM   #14
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well..i was going to start a thread..but this one is exactly what i was going to say...

im starting to see less reason for me to get an accessport. i read the map notes for what i would be running..(stg 2 91oct). it says that target boost is 15.8 psi. Now im not sure what stock is but my max boost right now pretty much peaks at .08mpa. now i read up on conversions and 17psi is said to read out to about .117 mpa. would 15.8psi even get me to .1mpa? doesnt seem to be too much more boost. i know boost is not all that matters but isnt it a big part of gaining power? the raised rev limiter is nice but for 600 is it worth it?? thats the question that has recently gone through my head.
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Old 01-05-2005, 10:08 PM   #15
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.1mpa ~ 1bar ~ 14.5psi...

Stock on a WRX is 13.5psi...you should be reading around .09-.093 mpa on the stock boost gauge.

Actually the optimal thing in reality would be to have a more optimal turbo where you could run lower boost to create the same power numbers...Lower boost = Lower Temps

The tuning will adjust the boost, ignition, and fuel, to create more power. More Boost does not always mean more power, or even more usable power. It does however always mean more heat.

The AP will give you a solid tune whereabout you'll be running within the safety parameters of the engine and creating more power without the need of bumping boost a crazy amount.

I know everyone wants to say they are running 45psi...just cause it sounds crazy. But if I could get the same power out of 10psi on one turbo vs 12 or 13psi on another...I'd go with the set up that would run lower boost.

Also, if you increase boost to a high level, upgrading your TMIC or upgrading to a FMIC would be a good idea...The stage 1 is fin on the stock TMIC..however it wouldn hurt if you could fins maybe a STi TMIC someone has for sale.
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Old 01-05-2005, 10:09 PM   #16
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WRXdriver04:
My boost used to peak at about 0.1 mpa, now with stage2 it peaks a little above 0.11 mpa. When using the accessport it reads 16.5 psi which I usually quote on the forums as I assume it's more accurate than an analog boost guage (could to totally off base on that one). Don't get disillusioned by the relatively small boost gains. For one thing they're more than what you quote (probably about 2 PSI for me.) I think your boost guage is off becuase according to onlineconversion.com 0.08 mpa is only ~11.6 PSI. But more importantly that 2 PSI extra comes earlier in the rpm's and lasts longer with stage2. To take full advantage of a full turbo-back exhuast you really need some form of engine management, be it utec, accessport, or whatever - not just for power but for reliability (keep you from running lean etc.)

Get the accessport, it's worth it.
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Old 01-05-2005, 10:23 PM   #17
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wow thanks for those responses that helps... yea i just took a quick glance at it today i was in 4th gear at about 4500 and mashed it... it shot up to about .08 i thinkl..maybe a little further...cant really stare at it too long.. haha..

CHIG. how can i make sure my boost guage is off? when my car is off the needle rests JUST below 0.. not even to the first mark.. idle is right in between -.05 and -.1... maybe a little towards -.05. whats an accurate aftermarket guage i could invest in to get accurate read outs.. im very into accuracy.. its obviously pretty important.

thank you both for the replies.. i will probably go ahead and get the accessport.
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Old 01-05-2005, 11:21 PM   #18
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If you have the factory boost gauge, it's true that it's not always 100% accurate. There was a thread about it a while back and people were seeing slight variances. I trust mine to be accurate within a reasonable margin (+/- .5psi).

To get more accurate readings, some people have been able to CRAM an Omori gauge into the stock boost gauge pod. It takes some pushing and careful prying, but it can be done. Directions are on www.scoobymods.com, I think.


As the others have said, it's not just about boost. I see boost more as a diagnostic reading than a performance goal.
-Vin
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Old 01-06-2005, 02:43 AM   #19
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i think cobb is great for off the shelf mapping, and with their access tuner software, i'm sure it'll be even nicer.
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Old 01-06-2005, 02:56 AM   #20
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i re checked my max boost pressure and it is in fact at .09.. a little shy of .1. so i dont think it is too far off.
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Old 01-06-2005, 10:25 AM   #21
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My boost guage is pretty much exactly at zero when the car is off. Snvin is right on imo, it's a diagnostic tool so as long as you know what it normally reads you'll be able to tell when you're not getting normal boost. As for accuracy you can use the accessport for real-time boost readings and that info comes directly from your ecu to a digital display. That's why I usually quote the 16.5 psi my ap reads and not the approximately 0.11 mpa my analog guage reads.
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Old 01-06-2005, 11:54 AM   #22
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This may go without saying, but resultant boost pressure is variable depending on conditions. (atmospheric, heat, etc, etc) Accessport retains stock ECU reactions to these parameters..(nice)
I have run accessport stg1 and now stg2(1.2 93oct) for almost 2 years consolidated.
Its a great alternative, its reliable etc,etc.
My boost varies, but I generally max @ .11 ~.12 milliPascals at WOT in 2~5 gear with taper in 1,2 gear.
Regardless of where your needle rests on your guage(0 or otherwise), I would look for consistency of boost. The guage will still provide info: boost spiking, taper, blah,blah.
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Old 03-29-2005, 02:07 PM   #23
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Quote:
Originally Posted by speedyshifter
anybody with the cobb accessport? can i get your opinion on those and are they good mods?
I just installed the Stage 1 today. it doesnt feel much faster than before, but i can see that the turbo is putting out more boost for a longer time. my butt dyno may not be very sensitive since i just took the car to the track 2 days ago, and i am used to W.O.T. conditions.
now that the Stage 1 is installed , i cant wait to go back (in April) and see what my lap times will be.
to answer speedshifter's original question, i would say that the Stage 1 difference is subtle, but noticeable. as i put on more miles, it is learning and getting better. my wife hasnt noticed, and the car doesnt sound or look any different. this is how the car should have been sold.

Last edited by X-VWGLX; 04-14-2005 at 08:21 PM. Reason: spelling
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Old 03-29-2005, 03:31 PM   #24
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When I recently installed Stage 1 on my stock WRX with axleback only, I was amazed how much difference it made. I don't think the stock ECU ever "learned" around the Stromung I put on there, but the Stage 1 seemed to be able to make power right away in Stage 1. I think I picked up some power below 3000 rpm, even though the dyno chart on Cobb's page doesn't show much; the car pulls right up a daily driven steep grade in fifth now that needed a downshift before.
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