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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Rematch: Cobb FBO 335i vs JB4 FBO 335i (Video Inside)



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      09-09-2012, 01:58 AM   #23
07_335i_AW
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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:
Originally Posted by 07_335i_AW View Post
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.
uhh, map 7 is 16.5 pounds and tapers more than my map 5 with the e85 in the tank. Thats why. So if i can use map 5, hit 16.5 pounds, and taper less up top than map 7, why would i use map 7 over 5? Have you been living in a cave and not seen what map 5 + e85 does with the jb4?

the first page of the jb4 sticky says what boost levels map 7 runs.
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      09-09-2012, 07:23 AM   #25
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Quote:
Originally Posted by blisstik View Post
Was that the E50 map?
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.

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Originally Posted by AU335i View Post
mehh... nice runs but honestly from all the talking that was done in the other thread...not impressed.... to pay for a protune only to beat the same car by half a car-length that is running a lower mix of e85? lol but just my opinion... i'm sure your car is still alot more fun though!
See comment above. Check out the affect of gearing between a 6mt and 6at car as well. A 6at car whores 6mt cars in roll races and at the track.

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Originally Posted by Beemw335 View Post
Goes to show you how beneficial 6at is.
The at car is runing 16.5 psi and kept up with the mt car running 18 psi.
Nice runs
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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Quote:
Originally Posted by 07_335i_AW View Post
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.
Map 7 is usually limited to 16.5 psi @ about 5,000rpm . Map 5 "targets" 17psi, but I can over boost to 17-18.5psi with an E40-E50 blend between 4,800-5,700rpm.

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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      09-09-2012, 10:40 AM   #27
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Quote:
Originally Posted by TLO03 View Post
yeaaah no, bolt ons have never been measured in "only needed if im pushing xxx hp" exhaust used to be the first bolt on. again not trying to get off topic or start crap . but an exhaust is a bolt on available to n54 cars. my thought was when you install all available bolt on's your car is Fbo.

we can agree to disagree, maybe i'm mistaken, please proceed with thread..

great vid good runs.
The consensus on this platform is as long as you have intake, downpipes, intercooler, tune, you are "FBO", as the cat back doesn't do much on this car.

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:
Originally Posted by spool twice View Post
Map 7 is usually limited to 16.5 psi @ about 5,000rpm . Map 5 "targets" 17psi, but I can over boost to 17-18.5psi with an E40-E50 blend between 4,800-5,700rpm.

O/P great video, but why only run E25 with the JB4? The PTF on the COBB car is definitely working as advertised
because i had filled up with 93 2 days prior lol. i tried to run it down as much as i could so i would have some room for e85 in the tank, but was only able to run down about quarter of a tank. I showed laid black 335i my receipt for 4.1 gallons of e85 that i had purchased just prior to meeting up with him in africa lol. 335i tank is 16 gallons, so 4 gallons is 25%.
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      09-09-2012, 01:56 PM   #29
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Originally Posted by jazze90 View Post
PTF charges like 299 for it 199 for an etune. I really think that's a huge bargain considering how much time they spend to perfect and squeeze the most out of your car. Look at people paying 1500-2000 for an exhaust or 6-900 for dowpipes or intakes and its just bolt up and go. On top of it all these guys won't leave you hanging ever at least in my case a definite both thumbs up and highly recommended. Without the pro tune this car loses but now it wins the race which is worth it to me
Exactly... And you get premiere service. My friend just spent $1100 at "unnamed" shop to fine tune his Cobb. Sadly enough, i still believe my JB4 is quicker and seeing what Jake does, he could have gotten him more HP.
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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...



Quote:
Originally Posted by Beemw335 View Post
Goes to show you how beneficial 6at is.
The at car is runing 16.5 psi and kept up with the mt car running 18 psi.
Nice runs

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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Originally Posted by AU335i View Post
Never raced an AT so I really don't have much to say about that...






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.
You may be losing power somewhere or his motor is a bit on the extra healthy side. With your mods, you should be running very low 12s and should walk away from him.

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, 09:02 PM   #32
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Cobb car has a slipping clutch
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      09-09-2012, 09:35 PM   #33
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Cobb car has a slipping clutch
Oh, so apparently you've driven my car before?
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      09-09-2012, 09:46 PM   #34
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Oh, so apparently you've driven my car before?
Just means there's more power to squeeze out with an upgraded clutch.
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      09-09-2012, 09:50 PM   #35
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Originally Posted by Fully_Bolted View Post
Cobb car has a slipping clutch
Oh, so apparently you've driven my car before?
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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Nice runs guys! Hopefully we can pull an AT vs AT comparo soon. =)
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, 01:23 AM   #39
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We need to visit the part of africa that has 4 lanes
make it five lol
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      09-10-2012, 09:13 AM   #40
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Quote:
Originally Posted by LuSt4Boost View Post
You may be losing power somewhere or his motor is a bit on the extra healthy side. With your mods, you should be running very low 12s and should walk away from him.

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.
Show me a 335i running low 12's on a COBB Stg. 2+ OTS map lol


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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OP, are you still on stock clutch? I'm assuming that hiccup at 5200rpm is your clutch slipping before 5200, and then catching.

Time to upgrade man
Agree. Definitely clutch slipping.. time to upgrade
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      09-10-2012, 09:24 AM   #42
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Show me a 335i running low 12's on a COBB Stg. 2+ OTS map lol


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.
It wasn't hard: http://www.e90post.com/forums/showthread.php?t=647732
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      09-10-2012, 09:25 AM   #43
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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.
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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Show me a 335i running low 12's on a COBB Stg. 2+ OTS map lol


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.
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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