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Old 01-11-2006, 05:44 PM   #1
rocketwrx
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Default Anyone had a bad experience with Cobb Stage 1?

I've searched around and haven't found many negative reports on this, but wanted to double check. Anyone have a bad experience with this? Particularly on an '05 WRX?
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Old 01-11-2006, 06:06 PM   #2
Scoobie Noobie
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Location: Black Sheep Squadron
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I think it's possible to have a bad experience if you don't follow the recommendations - esp. having a fully charged battery.
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Old 01-11-2006, 06:40 PM   #3
yobtah
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I'm "between aftermarket downpipes", so I went back to my stock downpipe for a while. I tried the Stage 1 91 octane map after I reinstalled my stock downpipe, and I heard what I think is knock during throttle tip-in while boost builds.

I have a 2003 WRX with a gutted uppipe and Samco intercooler hoses. Everything else engine-related is completely stock. Basically, I get one to three "tink" noises if I smoothly go to WOT around 3000 rpm in any gear. I've also tried the California Stage 1 91 octane map... same result. As you might guess, I've reverted to a stock map for now.

I haven't had a chance to data log the car with the Stage 1 map... and honestly, I'm not too interested because I don't plan to keep the stock downpipe installed long term. I have done some data logging with a completely stock map... IAM is 15 and knock correction values range from 6 to 10 during WOT and full boost when the car's running a stock flash. That makes me think the car itself is relatively healthy.

Given this, I'm not so sure Cobb Stage 1 is the best idea... it's probably better to replace at least your downpipe and get a custom tune.

Last edited by yobtah; 01-11-2006 at 06:51 PM.
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Old 01-11-2006, 09:00 PM   #4
STirocket
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Location: Auburn, WA
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2005 Impreza WRX STi
WRB with Goldies

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Best first mod EVER!!!
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Old 01-11-2006, 09:22 PM   #5
05SUBTECINT
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Join Date: May 2005
Chapter/Region: Tri-State
Location: Long Island, N.Y.
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2005 STI
Platinum Silver/Silver

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Installed my stage1, 93 octane map about
a month ago and have been in love ever since.
Definitely pulls much smoother/harder to redline,
but I also feel more torque down low.
Can't wait to flash to stage2, I hear that's when
the orgasm really cums!!!
It's a flexible upgrade and a great investment.
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Old 01-11-2006, 10:19 PM   #6
yobtah
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I wonder if an STi's increased ability to provide fuel makes it better able to handle the boost increase.

If I planned to stay Stage 1 for any length of time on a non-STi WRX, I'd at least get a KnockLink (probably a good idea with any EM upgrade). My experience with the "off the shelf" Stage 1 map makes me think not every stock WRX will handle the changes in fuel, timing, and boost well.
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Old 01-12-2006, 07:19 PM   #7
yakkosmurf
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Location: League City, TX
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2008 STI (Stage 1)
WR Blue Mica w/ Gold BBS

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Quote:
Originally Posted by rocketwrx
I've searched around and haven't found many negative reports on this, but wanted to double check. Anyone have a bad experience with this? Particularly on an '05 WRX?
I installed mine on my 05 wagon last night, and it went just fine. I'm running the Stage 1 91 octane map for now. So far, so good. I'm going to try going with the 93 oct real time map next week to see how it does on the 93 octane gas around here.

As for performance, it's just like everyone says. More top end, and I love the extra power below 3k rpm. The car now drives a lot more like my wife's IS300 5-speed. The increase in low end torque is almost as impressive as the top end. The engine now is smooth in its power delivery from idle to redline. In 4th gear, I max out at around 14.8 psi, so things are looking good.
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