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Old 03-23-2012, 11:15 PM   #1401
shaggydog
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Heres the trunk lighting. More pics. Been meaning to do this for the longest time on mine and my wifes OB. Just been too lazy.
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Old 03-24-2012, 02:12 AM   #1402
jege41
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Default 2011 wrx catless

Hi

I have installed a catless DP on my 2011 WRX,stock exhaust, with Cobb AP Stage 2 91

I have read many threads explaining that boost creep can be a real concern. What would be the proper parameters to monitor with the AP in real time? Also could you please provide some numbers as when I should be concerned?

I don't have a stand alone boost gauge as of now.

Thanks
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Old 03-24-2012, 02:15 AM   #1403
Celery GT-5
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I don't think its the best idea to run cobb's ots map with a catless dp

I think if you see anything in the 20s you should probably let off the gas though..lol
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Old 03-24-2012, 02:20 AM   #1404
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Hi
Ok thanks for that.
I was saw 18.5 and that was hitting it pretty hard, but not for long though.
I guess smacking it in 3rd for say 20 seconds or so should give me somwhere near the max reading, or would I be better in another gear?
Weather plays a role too I understand?
Thanks

Quote:
Originally Posted by Celery GT-5 View Post
I don't think its the best idea to run cobb's ots map with a catless dp

I think if you see anything in the 20s you should probably let off the gas though..lol
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Old 03-24-2012, 02:27 AM   #1405
Celery GT-5
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i dont really know man, I also have a catless dp, I haven't seen any crazy numbers yet, but supposedly its worse in the cold. What is your max boost supposed to be?

torqued performance stage 2 is 19, i think cobb is a bit more conservative
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Old 03-24-2012, 03:09 AM   #1406
jege41
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Hi
OK those numbers seem to be ok then @ 18.5
I get mostly 18.3 smacking it around in short course, but hit 18.5 in long.
Its lots of fun now though have to admit. At first I was kind of oh ok but in the twisties its really freakin quick
Regardless I'm gonna keep an eye on it for some time to come yet.
Funny as I can't really hear the turbo, must be my old man ears?

Quote:
Originally Posted by Celery GT-5 View Post
i dont really know man, I also have a catless dp, I haven't seen any crazy numbers yet, but supposedly its worse in the cold. What is your max boost supposed to be?

torqued performance stage 2 is 19, i think cobb is a bit more conservative
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Old 03-24-2012, 03:36 AM   #1407
Celery GT-5
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yeah all that stuff is right...u hear the turbo more and at first it doesnt seem like a big deal then u push the car a little and u realize there is just a lot more substance than there was before
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Old 03-24-2012, 07:02 AM   #1408
lovin' it
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Third gear pulls are the best IMHO.
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Old 03-24-2012, 12:07 PM   #1409
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Quote:
Originally Posted by Celery GT-5
i dont really know man, I also have a catless dp, I haven't seen any crazy numbers yet, but supposedly its worse in the cold. What is your max boost supposed to be?

torqued performance stage 2 is 19, i think cobb is a bit more conservative
Cold weather is where you really want to keep an eye on it. It should state on your AP in the map details what your peak should be. Scroll down to the bottom of the page just before you flash it. If you over boost then try the low Wastegate map (LWG stage 2 map) . You can upload that to your AP from Cobbs site for free. COBB ots maps are not intended for catless so keep that in mind, but you might be able to get away with it for awhile before you do a protune which would be a better option. 3rd gear pulls are where you want to datalog. Datalog from 2500rpm to redline wot.
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Old 03-24-2012, 12:43 PM   #1410
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The stock ECU has compensation tables for air temperature and will reduce WGDC accordingly for colder temps. Cobb does change the compensation tables, but again those expect a high flow cat on the DP. Going catless in cold weather with Cobb OTS Stage 2 map will exacerbate high boost problem. As PearlRex11 said, just be extra careful in the cold weather if you want to stay with the Cobb map.

You are far away from throwing an overboost code, so you should be fine. Changing other things like the top mount IC and pulley will throw a code real quick on Stage 2 cobb map.

I would recommend a stage 2 tune from Torqued Performance. He can adjust the map specifically for a catless DP easily. Once you start doing other mods then a protune on a dyno is ideal.
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Old 03-24-2012, 09:26 PM   #1411
Celery GT-5
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i think I may have caused sort of creep today. 4th gear going up hill, needle was going back and forth between 19 and 20 and it made a fluttery sound. Couldn't replicate it, I think just don't do dumb things like floor it up a hill at low rpms in a high gear
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Old 03-25-2012, 12:32 AM   #1412
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That's kinda how I got boost creep. As soon as I flashed stage 2 (catless dp with cobb ots map) I was trying to make sure it would hit target boost so I floored it in 4th then it just kept climbing to like 23 psi and threw a CEL. So I didn't do that again lol
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Old 03-25-2012, 12:49 AM   #1413
Celery GT-5
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lol nice work
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Old 03-25-2012, 03:04 AM   #1414
jege41
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Default Catless smell is pretty bad

Hi
Sort of regretting going catless due to the smell, much worse than I anticipated and there is not a thing I can do about it.
Catless pipe for sale next year.
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Old 03-25-2012, 03:16 AM   #1415
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My coworker has a catless evo and I must say it is quite harsh. But my hi flow cat smells like a go cart or a lawn mower. Lol or a two stroke.
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Old 03-25-2012, 03:21 AM   #1416
jege41
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The good thing is that it may reduce tailgaters

Quote:
Originally Posted by captncal View Post
My coworker has a catless evo and I must say it is quite harsh. But my hi flow cat smells like a go cart or a lawn mower. Lol or a two stroke.
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Old 03-25-2012, 09:56 AM   #1417
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Quote:
Originally Posted by jege41 View Post
Hi
Sort of regretting going catless due to the smell, much worse than I anticipated and there is not a thing I can do about it.
Catless pipe for sale next year.
Rather than selling your Catless pipe for a loss then paying more for a new one. Go to an exhaust shop. they can take your catless DP and cut in a cat for much cheaper than loosing money on your catless and buying a new catted one.
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Old 03-25-2012, 11:56 AM   #1418
jege41
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Default

Hi
I wondered about that!
Thanks I will consider that option.
If i decide to go that route where would be the best placement, up top or down below.I would assume up top but I'm just a noob so thought I would ask.
Thanks


Quote:
Originally Posted by Louie View Post
Rather than selling your Catless pipe for a loss then paying more for a new one. Go to an exhaust shop. they can take your catless DP and cut in a cat for much cheaper than loosing money on your catless and buying a new catted one.
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Old 03-25-2012, 12:00 PM   #1419
PearlRex11
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Quote:
Originally Posted by jege41
Hi
I wondered about that!
Thanks I will consider that option.
If i decide to go that route where would be the best placement, up top or down below.I would assume up top but I'm just a noob so thought I would ask.
Thanks
Up top, they operate better when they are hot from what understand. They also work faster after cold starts because they heat up sooner. Most aftermarket dp's have them almost right up against the bellmouth which might be hard for an exhaust shop to do though.
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Old 03-25-2012, 01:33 PM   #1420
Louie
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Quote:
Originally Posted by jege41
Hi
I wondered about that!
Thanks I will consider that option.
If i decide to go that route where would be the best placement, up top or down below.I would assume up top but I'm just a noob so thought I would ask.
Thanks
I would have them put it in the stock location just before the cbe flange. You dont want it to interfere with wastegate exhaust flow or any exhaust flow really.
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Old 03-25-2012, 02:01 PM   #1421
Celery GT-5
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yeah if i ever want a cat that's what im doing
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Old 03-25-2012, 02:38 PM   #1422
Louie
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Quote:
Originally Posted by Celery GT-5
yeah if i ever want a cat that's what im doing
I'm considering doing that because we have to do emission checks every two years.
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Old 03-25-2012, 02:42 PM   #1423
Celery GT-5
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from what i hear cobb's cat location is the best and for the ~$300 price diff im sure i can get a cat or 3 thrown in there
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Old 03-25-2012, 09:58 PM   #1424
shaggydog
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Quote:
Originally Posted by Louie View Post
I would have them put it in the stock location just before the cbe flange. You dont want it to interfere with wastegate exhaust flow or any exhaust flow really.
This, you want the cat towards the tail end of the DP ie Cobb, Harman Motive, MadDad...
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Old 03-25-2012, 09:59 PM   #1425
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Quote:
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I'm considering doing that because we have to do emission checks every two years.
I wish! Every year here. Fuuuuuuuuuuuu
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