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Old 05-05-2005, 07:51 PM   #1
Anub1s
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Default Low-End loss with Cobb Stage 2?

Hey again guys,

Since I got my car back I have been experimenting with some of the AccessPORT maps. I currently have stage 2 91 oct as my base but I noticed that in the low end I don't have as much power as the stock map, there is also some hesitation when accelerating. Of course top end is amazingly different with this map. I put on the Stock real time map and the low end came back and of course the top end went away. Is the low end power loss common with the Stage 2 91 oct map?

Thanks

Anub1s
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Last edited by Anub1s; 05-05-2005 at 07:57 PM.
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Old 05-05-2005, 08:19 PM   #2
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And once again I have forgotten my mods:
'02 WRX
Stock intake of course
Helix V.2 header
HKS up-pipe
Invidia TBE
GFB Blow off valve
AccessPORT Stage 2
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Old 05-05-2005, 09:04 PM   #3
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Im running Stg 2 93 octane, and I have not noticed low end loss, 1st and 2nd gear is amazing, 3rd gear is where it seems i lose a lot of power but once I hit 4th gear, get out of the way. I have run my car with the stock intake and with the perrin short ram, and to be honest I don't care what cobb says, the perrin short ram drastically helps the car out, spool up quicker plus more response. How many miles do you have on your car? Also one more thing to add, your car won't hit 15.7 psi in all gears, only gears I hit that much boost is in 4th and 5th. Compared to stock there shouldnt be much difference in boost pressure in first couple gears. Here is what you do, go race a stock wrx, you will be pissed when you don't leave him, then all of a sudden 4th gear hits and you blow his doors off. I know this for thats what I did with my buddy who just bought an 05 wrx.
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Old 05-05-2005, 09:07 PM   #4
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I've not noticed any loss...wait I went straight to Stage 2!
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Old 05-05-2005, 09:38 PM   #5
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Thanks, I know I will not hit target boost in all gears, but still that low end just crapped out on me, before the turbo is fully spooled I am a literal gutless wonder. I have 68K on the car right now. Had problems with running rich which could be my problem still. I am thinking of getting Dyno tuned from Cobb but that would have to wait for a while, thanks for the input guys I guess my car is just ****ed.
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Old 05-05-2005, 10:38 PM   #6
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...header.....
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Old 05-05-2005, 10:40 PM   #7
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header is holding you back...
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Old 05-05-2005, 11:05 PM   #8
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I've had no loss of low end power. I think it's better. Boost comes on sooner. No lag.
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Old 05-05-2005, 11:31 PM   #9
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No it's not the header, I know I will lose time on the spool up but that does not explain anything in loss of low end overall POWER. The car is considerably slower than it was before, before 3k rpm's of course.
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Old 05-05-2005, 11:41 PM   #10
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i had a gain of low end power. top end ends faster than stock but its still nicer than stock. 1st 2nd and 3rd pull hard but 4th sucks.
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Old 05-05-2005, 11:48 PM   #11
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I lost low-end power with header.
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Old 05-06-2005, 12:00 AM   #12
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...the Cobb maps aren't 'header' friendly....and if not tuned for, a header will kill low end powa
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Old 05-06-2005, 12:25 AM   #13
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Well the thing is I had a good amount of power with the header on before the Stage 2 remapping. Now that I have the stage 2 mapping, the low end suffers. Maybe I will just go to over to Cobb and have them tune it. That should fix it. Thanks guys.
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Old 05-06-2005, 12:49 AM   #14
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I hope it's not the header. I'm getting ready to install one on my 04 cobb stage 2. I know people running headers with cobb stage 2 and they are happy. I've been told to expect better low end (before boost comes on) and at most a little added lag. I'm doing the header and up pipe at the same time so I was thinking that the up pipe would offset any added lag due to the header. I guess we'll see what happens.
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Old 05-06-2005, 12:56 AM   #15
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Quote:
Originally Posted by txl146
I lost low-end power with header.
but gained alot of power 3.5k and up
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Old 05-06-2005, 12:57 AM   #16
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Quote:
Originally Posted by MD04WRX
I hope it's not the header. I'm getting ready to install one on my 04 cobb stage 2. I know people running headers with cobb stage 2 and they are happy. I've been told to expect better low end (before boost comes on) and at most a little added lag. I'm doing the header and up pipe at the same time so I was thinking that the up pipe would offset any added lag due to the header. I guess we'll see what happens.

the uppipe will help alot offsetting the header. also think about turbo inlet hose, that'll help too. Get some i/c hoses if you havent yet.
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Old 05-06-2005, 01:03 AM   #17
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Quote:
Originally Posted by garie
the uppipe will help alot offsetting the header. also think about turbo inlet hose, that'll help too. Get some i/c hoses if you havent yet.
I have the JDM sti intercooler with sti y pipe and the other 2 intercooler hoses are perrin. Still have the stock inlet hose. I here it's a PITA to install a new inlet hose.
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Old 05-06-2005, 08:55 AM   #18
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Any thing that helps spool should counter act the header
Upipe, turbo inlet hose, IC hoses, ported/polished turbo, etc. These mods raise the low end, but don't do much for top end.
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Old 05-06-2005, 11:02 AM   #19
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Quote:
Originally Posted by Anub1s
No it's not the header, I know I will lose time on the spool up but that does not explain anything in loss of low end overall POWER. The car is considerably slower than it was before, before 3k rpm's of course.
Listen to the guru you newbie! they know what they are talking about: Headers!!!
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Old 05-06-2005, 01:55 PM   #20
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lol I know they know what they are talking about but you would have to drive my car to understand, I had the damn header on there before the accessport, I had almost no power loss. If you read my posts, you would understand that. Then I stated that STOCK MAPPING eliviated the problem, so, if you have nothing nice to say STOP POST WHORING!

Thanks anyways.
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Old 05-06-2005, 02:16 PM   #21
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I gained low mid and high when I went to stage 2 from stage 1.
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Old 05-06-2005, 05:08 PM   #22
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I had always heard that headers were bad for the 2.0L. Is there any solid reason why you should get headers?
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Old 05-06-2005, 05:10 PM   #23
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put the stock header on NOWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWWW
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Old 05-06-2005, 09:51 PM   #24
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Quote:
Originally Posted by MBREX02
I had always heard that headers were bad for the 2.0L. Is there any solid reason why you should get headers?
I know there are people here running headers on the wrx with good results. This includes people with cobb stage 2. I'm surpised none of them have responed to this tread. There is a header FAQ and I think the Unabomber is running a header with cobb stage 2. http://forums.nasioc.com/forums/showthread.php?t=601219
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Old 05-06-2005, 11:12 PM   #25
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i've got a header and run the cobb stg 2 maps. love it. i felt a lil loss in the bottom end also. just changed my driving style to it.
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