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Old 11-04-2011, 09:44 AM   #1
99imprezd
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Default Retuning Question?

Ive got an '04 EJ20 WRX I just did a fresh stock rebuild with ACL Main & Rod Bearings. The car runs frkn awesome and has about 2000 miles on it so far. I got the car with (a rod knock which is why I rebuilt) Had an ebay catless Up pipe and 3" Catless Bellmouth downpipe. HKS Seq BOV, Stock turbo and inlet. Stock airbox with a K&N filter, stock mid pipe back to a stock axleback. It also has a Stage 2 Cobb Tune.

Both the up-pipe and downpipe were rusty from the heat wrap around it and cracked. I replaced the up-pipe with a Perrin catless and the Downpipe with an Invidia V2 catless. When the exhaust was leaking it actually sounded pretty good suprisingly but now you can barely even hear it running until you boost it up. My question is do I need to recalibrate the tune when the same parts are replaced with better ones? I havent played with the Cobb tuner yet but will this effect the way the car performs?
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Old 11-04-2011, 10:28 AM   #2
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What do your Cobb map notes say about this?
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Old 11-04-2011, 10:31 AM   #3
99imprezd
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Havent got that in depth into it.. Just curious how sensative different parts may effect what the car is tuned for. After work Im gonna dive into it!
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Old 11-04-2011, 01:06 PM   #4
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Originally Posted by 99imprezd View Post
Havent got that in depth into it.. Just curious how sensative different parts may effect what the car is tuned for. After work Im gonna dive into it!
I would go ahead and reset the ECU via the AccessPORT, but you are good to go with the stage 2 OTS map since you fit the minimum requirements (stock intake, aftermarket downpipe).

Bill
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Old 11-04-2011, 01:28 PM   #5
99imprezd
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Okay, does this reset the ecu to the base tune and then the computer relearns based on my particular setup or something along those lines?

Another question.. Are there any upgrades that I should stay away from with a Stage 2 (93) tune? As far as a short ram intake, Silicone Turbo Inlet Hose or perhaps even a 16g turbo?

Thanks for your input!

Quote:
Originally Posted by Cobb Tuning View Post
I would go ahead and reset the ECU via the AccessPORT, but you are good to go with the stage 2 OTS map since you fit the minimum requirements (stock intake, aftermarket downpipe).

Bill
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Old 11-04-2011, 02:36 PM   #6
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Originally Posted by 99imprezd View Post
Okay, does this reset the ecu to the base tune and then the computer relearns based on my particular setup or something along those lines?

Another question.. Are there any upgrades that I should stay away from with a Stage 2 (93) tune? As far as a short ram intake, Silicone Turbo Inlet Hose or perhaps even a 16g turbo?

Thanks for your input!
Resetting the ECU just resets the learned parameters - it does not change the tune. Unless you were running a real-time map different than your "reflash" map. In that case, the real-time map would simply be reset to the reflash map.

The only intakes that are compatible with our 02-05 WRX OTS maps are the stock and Cobb SF intakes. Do not use any other intake with these maps. Also, stock turbo and injectors are required for all our stage 1 and stage 2 OTS maps. An aftermarket turbo inlet is, however, acceptable for these maps.

For the 02-05 WRX, we do have some stage 3 maps for specific turbos and injectors. You can check these out in our map repository:
http://www.cobbtuning.com/info/?ID=3061

Bill
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Old 11-04-2011, 02:47 PM   #7
99imprezd
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Okay sweet.. Ive got some reading and re-flashing to do. Cobb makes excellent products... You guys Rock!
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