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BMW 3-Series (E90 E92) Forum
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Rematch: Cobb FBO 335i vs JB4 FBO 335i (Video Inside)
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09-09-2012, 01:58 AM | #23 |
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Awesome runs!! So why not even it up with the JB4 on map 7? Don't know why he keeps running map 5 which has less boost than map 7.
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09-09-2012, 02:26 AM | #24 | |
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Quote:
the first page of the jb4 sticky says what boost levels map 7 runs.
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Current: 2017 F30 340i xdrive
Previous: 2008 e92 335i coupe: RB turbos, mach 116 race fuel, methanol, alot of boost. Previous: 2003 Honda Accord V6 coupe: AEM V2, zex 75 wet shot (sold) |
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09-09-2012, 07:23 AM | #25 | |
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Its actually e30 mapping that i scaled him to run E40. I could squeeze another 10-15whp out of it but without getting logs i didnt want to get to aggressive.
Quote:
The Cobb tuned car runs 18psi peak. It runs the same or a little less throughout the remainder of the power band. The taper on deans tune has a more negative slope than the JB4. I tuned a 6at car that night as well - wonder if we could get her and stucks to line up on that african track as well |
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09-09-2012, 09:04 AM | #26 | |
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O/P great video, but why only run E25 with the JB4? The PTF on the COBB car is definitely working as advertised
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Prior Car:'14 Audi S5 3.0t DSG [ APR ECU/TCU | Pullies + basic bolt-on mods | 10.861@127.90mph ] Current Car: F82 M4cs | TT-RS | On Order: i4 M50 |
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09-09-2012, 10:40 AM | #27 | |
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Quote:
Technically, you can bolt on a upgraded turbo or single turbo too, so the full bolt on is a loose terminology throughout many platforms. |
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09-09-2012, 10:42 AM | #28 | |
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Quote:
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Current: 2017 F30 340i xdrive
Previous: 2008 e92 335i coupe: RB turbos, mach 116 race fuel, methanol, alot of boost. Previous: 2003 Honda Accord V6 coupe: AEM V2, zex 75 wet shot (sold) |
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09-09-2012, 01:56 PM | #29 | |
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09-09-2012, 08:18 PM | #30 | |
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Never raced an AT so I really don't have much to say about that...
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however, I ran my friend's JB4 335is (intakes, DP) on 14.5 psi and I was COBB Stg. 2+ (intakes, DP, FMIC) on 18.5 psi.... we were neck and neck... so boost doesn't seem to matter as much imo. |
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09-09-2012, 08:58 PM | #31 | |
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With that said, JB4 on 18.5 psi is a night and day difference than JB4 on 14.5psi. If you really are neck and neck with him at 14.5psi, and you were to run him at the same amount of boost as you were, he would have easily left you standing still.
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09-09-2012, 09:46 PM | #34 |
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09-09-2012, 09:50 PM | #35 |
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It's obvious in your 60-130 vid, your clutch slips till 5200 and catches, that's why the RPMs studded for a second. Fwiw, I had the same issue when I started running E85.
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09-09-2012, 10:04 PM | #36 |
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Nice runs guys! Hopefully we can pull an AT vs AT comparo soon. =)
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09-09-2012, 10:32 PM | #37 |
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I'm down for this. I never get to have any fun...in Afrika lol
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09-09-2012, 10:45 PM | #38 |
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We need to visit the part of africa that has 4 lanes
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09-10-2012, 09:13 AM | #40 | |
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Quote:
and there have been other instances where piggy's running lower boost keep up with COBB's running ~18 psi... my car feels just as fast as it did on 15.5 psi. |
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09-10-2012, 09:22 AM | #41 |
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Agree. Definitely clutch slipping.. time to upgrade
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09-10-2012, 09:24 AM | #42 | |
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09-10-2012, 09:25 AM | #43 |
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Its a good problem to have your car is making good power! Once you upgrade that clutch you will be even faster since you will be putting more power to the ground
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09-10-2012, 10:32 AM | #44 |
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I have done it 12.1 is best I have ran multiple 12.2 runs and I usually pull 12.4 or less when on the Stg 2+ aggressive 93 octane. I posted slips and vids of runs on here before but here are some slips from 6 months to a year ago I was able to find that I have.
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60-130, cobb 335i, e85, jb4 335i, race |
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