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Old 01-12-2005, 01:59 AM   #1
DOUBLE U ARE X
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Default acessport stage 2 safety

ive looked at EVERY acessport thread on this board, and ive decided its gonig to be the e/m of my choice, i currently have an aftermarket upipe,downpipe,and intake silencer deleter, so im wanting to run stage two right off the bat...but my questions are, how hard is the stage 2 on the ej20 i know the boost levels are significantly higher..something like
1st -14
2nd-15
3rd-16
4th and 5th-16.5-17.5 ?

i just want to be sure im not going to have any terrible problems, like with my "glass transmission"...how willl it hold up to the power, i have 36k on the car and dont want to do anything im going to regret


btw i didnt see many threads pertaining to my topic but if mods think its necessary, dont hesitiate to delete it
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Old 01-12-2005, 02:20 AM   #2
wrxdrvr
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Should have no trouble with stage 2 as cobb tunes for reliable safe power for motor. As for the trans. its up to how you apply the power. I think max boost is 15.8 +-.5 Psi.
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Old 01-12-2005, 08:37 AM   #3
yobtah
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Those sound more like STi Stage 2 boost levels. I think maximum boost for a Stage 2 non-STi WRX is 15.8 psi +/- .5 psi. This comes from Cobb's map notes on the Stage 2 maps.

As for the transmission... yeah, I'm a bit concerned about mine too. I've even heard of people breaking them at stock power levels... regardless whether it's stock or Stage 2, the car has a lot of power, and the transmission isn't the strongest. On the other hand, there are plenty of people making around 280 hp and not breaking tranmissions. In fact, a lot of SCCA Solo II and ProSolo people make 270-280 hp. I think driving style is a bigger factor than the power increase.


Quote:
Originally Posted by DOUBLE U ARE X
ive looked at EVERY acessport thread on this board, and ive decided its gonig to be the e/m of my choice, i currently have an aftermarket upipe,downpipe,and intake silencer deleter, so im wanting to run stage two right off the bat...but my questions are, how hard is the stage 2 on the ej20 i know the boost levels are significantly higher..something like
1st -14
2nd-15
3rd-16
4th and 5th-16.5-17.5 ?

i just want to be sure im not going to have any terrible problems, like with my "glass transmission"...how willl it hold up to the power, i have 36k on the car and dont want to do anything im going to regret


btw i didnt see many threads pertaining to my topic but if mods think its necessary, dont hesitiate to delete it
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Old 01-12-2005, 12:18 PM   #4
Chigliakus
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According to the AP I hit 16.5psi and according to my stock boost gauge I hit just over 0.11 Mpa so I am pretty sure the reading is correct. This is easily verifiable in 3nd gear on (it's hard to tell if I hit 16.5 in 2nd as things happen quickly but I think I do). I'm going to FIS on Friday to dyno, should be interesting to see if the boost is making more power than the avrage Cobb stg2. I've also asked them to use their wideband on my car so I'll see how the A/F ratio is at 16.5 lbs.

There is plenty of advice on preserving your 5mt "glass gearbox" in how-to-drive threads all over nasioc. I follow their advice and have over 43k miles on my tranny with no problems. That said I do plan on swapping to the jdm 6mt asap, as finances permit.
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Old 01-12-2005, 02:13 PM   #5
DOUBLE U ARE X
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so basically if i drive somewhat conservatively, ther should be no problems witht the gearbox
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Old 01-12-2005, 02:25 PM   #6
ptaaty
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just don't side step the clutch and start dumping.

i am a little freaked with first gear, but so far no probs. If i stomp the throttle on a roll on, once i hit about 4k, it feels like I am being launched and my neck snaps even ready for it....first and second just fly by.

ah stage 2 is sweet. I seem to be always waiting for slow cars on onramps even just barely accelerating and shifting just over 3k....
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Old 01-12-2005, 05:33 PM   #7
DOUBLE U ARE X
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when you load up stage 2 can you feel the results immediately? or is there a learning period. also how would you guys compare the stage 2 to a factory sti?
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Old 01-12-2005, 06:42 PM   #8
DOUBLE U ARE X
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i do have a cat in my downpipe though, i bought it from the dealership with the downpipe, and it looks like it used to be catless and they just cut out a section and welded a cat in, it doesnt look to be high flow but do u think i should still be ok with the stage 2?
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Old 01-12-2005, 06:55 PM   #9
ptaaty
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no, you need no cat (preferred) or a high flow. This is the only requirement for cobb's stage 2....but I would do a full tbe and then a catless uppipe (oh yeah i did )

It is immediate, it is much faster than even a fully "learned in" stock ECU flash, and gets faster as it learns.
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Old 01-12-2005, 07:05 PM   #10
Chigliakus
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I went from stock to Cobb catted dp and ap stg2 and the difference was amazing. Put a huge smile on my face, and still does. That first day it's like getting a new car.
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Old 01-12-2005, 07:06 PM   #11
DOUBLE U ARE X
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what would the effects be if i ran it with the cat...its the only cat i have, slightly lower boost levles?
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Old 01-12-2005, 07:19 PM   #12
ptaaty
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it all depends how well that cat flows....I think the big issue is that is the cat has the most restriction and hurts the performance the most, AND I think keeping it in may mean your EGTs will be to high....

just put in a downpipe! or gut the cat!
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Old 01-12-2005, 09:26 PM   #13
DOUBLE U ARE X
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u really think that 1 cat will raise the egt that much...i dont really want to go catless
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Old 01-12-2005, 09:29 PM   #14
ptaaty
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keep/get 3rd cat or go high flow for the second
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Old 01-12-2005, 09:36 PM   #15
Chigliakus
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For best catted results go with a good high-flow cat. I don't see why the egt's around the 2nd or 3rd cat would really matter much, but the stock ceramic brick will definitely cause lost horsepower and slower turbo spool.

If you're worried about the environment get a dp that has the high-flow cat close to the turbo. I still have the 1st cat however I can smell gasoline around my exhuast (especially if I blip the throttle) until the engine and cats warm up a bit. The closely-coupled cat will heat up faster and reduce cold start emissions.
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Old 01-13-2005, 02:34 AM   #16
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so would it be ok to run stage 2 on my setup the way it is?, im not too worried about the power loss, i just dont want to meess anything up over this cat...what are the effects of too high egt's
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Old 01-13-2005, 02:48 AM   #17
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I have Invidia downpipe with Espelir catback (no-cat tbe), and the power was instant after installing the stage 2 ...I was told to not punch it too hard for the first 100 miles or so (cuz the ECU's gotta learn it, but it learns it fast)...I have a silencer on my muffler so i'm not getting over 1 bar yet

best power for the money (IMO)
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Old 01-13-2005, 10:57 AM   #18
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I read on here somewhere that a guy ran Cobb stg2 after gutting his cats in his dp. I think you'll be fine as long as the dp you have flows better than stock.

As far as a silencer preventing you from hitting full boost that would have to be a very restrictive silencer. When I first switched to stg2 I was running with the factory cat-back and was hitting 16.5 psi. Do you really think the silencer in your high-flow exhaust creates more back pressure than the stock muffler?
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Old 01-13-2005, 10:58 AM   #19
HUnterD
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im running stg1 with a catback ,i just got a dp i havent
installed yet , when i do ,will i stay on the stg 1 map?
or flash 2,
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Old 01-13-2005, 01:09 PM   #20
timmah
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interesting, i am going stage 2 eventually and was wondering the same thing....

will my transmission hold up?

i've never launched the car.
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Old 01-13-2005, 02:34 PM   #21
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I don't mean to rain on the parade but I'm not so sure about the safety of COBB stages anymore.

I'm running, eh...WAS running, COBB stage 2, with a gutted stock uppipe, scoobysport downpipe, and 3in. Stromung Cat-back (stock intake, 3rd cat in place).


In 4th and 5th gear highway driving, I was always hitting 16.5 lbs of boost, with frequent spiking to 17.5 lbs.

My EGT's were always touching on 1600 F.

I was spending more time watching my gauges then watching the road.

I flashed back to stock about a month ago.
Now I hit 15-15.5lbs max and my EGT's never pass 1450 F.

Also, suprisingly, the car doesn't feel any slower.

Now I have much more peace of mind when I'm doing WOT runs.

Just my 2


TT
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Old 01-13-2005, 03:53 PM   #22
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Tasty,
If your base map was never changed back to stock then you're still running stage 2. It's not enough to simply flash the real time map to the stock one. How could you make 15.5 psi with a stock ECU??

You NEED to have a catless DP, or at the very least a high flow cat, to run AP stage 2. Trey Cobb makes this abundantly clear. Also, if you're going to run a cat, the further downstream from the turbo the better.

Hunter - You know you're going to stg2 man, c'mon.
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Old 01-13-2005, 05:16 PM   #23
ptaaty
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just don't run cobb's stage 2 with the stock downpipe and cat in!!!

the faqs on cobbs site specifically point out the one thing you NEED to run the stage 2 map is a high flow cat or no cat in the downpipe. you wont get the full benefit without a full TBE, but just run stage 1 with the downpipe cat. I know it isn't what you want to hear but, even stage 1 is a nice bump in power. when you get the time pull the downpipe and gut the cat or put in a catless, then flash to 2
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Old 01-13-2005, 05:23 PM   #24
Chigliakus
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I assume that you were running a crappy California gas there TastyTurbo. Seems like the Cali folks have more problems due to the 91 octane and all the additives CARB requires to make the gas burn cleaner. Were you running the Cali specific stg2 map, if not you should have tried that before giving up. I would think you'd be in more danger with your current mods without EM than with the AP.
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Old 01-13-2005, 09:19 PM   #25
DOUBLE U ARE X
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so it would be ok to run a catless downpipe to my stock 3rd cat to stock exhaust?...why would this setup be better than what i have now, my cat in my downpipe now is almost where the exhaust flatens out.



who makes a "short" bellmouth downpipe that i will be able to bolt my factory cat and exhaust up to?


thanks-johnny
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