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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > Around 8% HP gain on protune vs "notune" is that normal?



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      03-09-2016, 01:59 PM   #23
proTUNING Freaks
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Its strange to see you post results after 27 emails of back and forth, a starter map and 1 revision of that starter map. Your order also came through to us with a high risk red flag that it was potentially fraudulent due to the customer using a web proxy to place the order and that the billing address was listed as Poland but the order was placed from Netherlands. We let that go and proceeded with our tuning still even though we typically refuse any order deemed fraudulent by our web store host, Shopify.

In terms of the tune, we typically start milder and turn things up from there sorting out any tune related issues along the way and many of our customers can attest to this. In cases where there is enough hardware variance from what the customer's car has and how our starter maps are built we adjust the tune to account for that. Part of the reason why OTS canned maps for the N55 rarely work flawlessly and why at times there can be many revisions to get the car running as well as it can. Sometimes after spending lots of time doing revisions a hardware issue (bad solenoid, boost leak, bad injector, coil) ends up getting found and in some cases all those revisions done are thrown out and tuning would start over with the starter map again.

Your were getting transmission overheat warnings on kickdown shifts which didn't allow us to push much harder and can/would also impact results. OEM N55 turbo is also another limiting factor in power gains but in this tune we didn't max that out either due to just starting out, the transmission slip issue and having just 1 revision done before you called it off.

In terms of adding a JB4, we support that as well for those looking to go the stacked route or to push past the OEM TMAP sensor limit of 1.5bar (~22psi). The only issue is adding a JB4 on the N55 you lose visibility into knock on cylinders 2-6 that you otherwise have when you're running flash/Cobb only.

Best of luck with the local tuner. Hope you get it all sorted and have a great tune on the car to beat on and have fun with.

Last edited by proTUNING Freaks; 03-09-2016 at 02:05 PM..
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      03-10-2016, 07:04 AM   #24
GreQonE
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Thank you for your service PTF, I will post results once done
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      03-19-2016, 08:22 PM   #25
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New dyno on OTS Cobb maps:



EDIT: Both maps are "Aggressive" variant.
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