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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > What's the AFR at full boost with B58 + JB4 ?
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      07-08-2016, 09:26 PM   #1
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What's the AFR at full boost with B58 + JB4 ?

What AFR are folks seeing at full boost, WOT, on their B58+JB4 ?
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      07-08-2016, 10:02 PM   #2
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Quote:
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What AFR are folks seeing at full boost, WOT, on their B58+JB4 ?
Thank you for creating threads that I want answers to as well!

Bump for responses!
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      07-09-2016, 09:08 AM   #3
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Anywhere from high 12s to 14s depending on RPM etc
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      07-09-2016, 01:07 PM   #4
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Anywhere from high 12s to 14s depending on RPM etc
Is that high/safe for longevity?
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      07-19-2016, 02:45 PM   #5
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      07-19-2016, 02:46 PM   #6
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Quote:
Originally Posted by HitmanHearns View Post
Is that high/safe for longevity?
Yes it is safe
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      07-21-2016, 06:54 AM   #7
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Quote:
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Originally Posted by JamRWS6 View Post
Anywhere from high 12s to 14s depending on RPM etc
Is that high/safe for longevity?
I'm certainly not an expert but it seems to be the same range the stock cars run. Every indication is that map 1 is actually pretty conservative. I've seen absolutely no codes thrown and seen nothing but good performance from the car even in recent 100 degree temps.
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      07-21-2016, 10:05 AM   #8
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Map 1 is conservative and safe on a direct injection motor. I am waiting to see what this motor is made of when they crack the fuel trim cap issues.
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      07-21-2016, 11:37 AM   #9
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Quote:
Originally Posted by HitmanHearns View Post
Is that high/safe for longevity?
It's direct injection so it doesn't need to be as rich as traditional port injection cars which typically aim for mid 11's.
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      07-21-2016, 06:58 PM   #10
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I think mine are in the 12s, but N55 though.
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      07-22-2016, 09:39 AM   #11
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Damn, those B58's have a gnarly powerband on map1! I bet that feels great!
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      07-22-2016, 09:54 AM   #12
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Originally Posted by shivaswrath View Post
I think mine are in the 12s, but N55 though.
Yeah me too. I run like 12.2-12.4 all the way across the board on my flashed car.

By the way I went and submitted to the pressures of more power and picked up a pure stage 1. Awaiting delivery.

I know you were in the same boat, did you get yours? Did you bolt it up? I have to get with Enzo and see how they want me to set up map 6 with the JB4...

I cant wait. The stock PWG turbo is such shit...
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      07-22-2016, 10:07 AM   #13
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Originally Posted by shivaswrath View Post
I think mine are in the 12s, but N55 though.
I cant flippin wait to pull 16-17psi to redline, the stock turbo is just so weak after 4500rpm.
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      07-22-2016, 11:48 AM   #14
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Quote:
Originally Posted by dd1981 View Post
Yeah me too. I run like 12.2-12.4 all the way across the board on my flashed car.

By the way I went and submitted to the pressures of more power and picked up a pure stage 1. Awaiting delivery.

I know you were in the same boat, did you get yours? Did you bolt it up? I have to get with Enzo and see how they want me to set up map 6 with the JB4...

I cant wait. The stock PWG turbo is such shit...
I did!
I went with Enzo/JB4+Dinan, i reviewed it just yesterday!
You'll run out of asphalt before you run out of boost.
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      07-22-2016, 11:51 AM   #15
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Quote:
Originally Posted by shivaswrath
Quote:
Originally Posted by dd1981 View Post
Yeah me too. I run like 12.2-12.4 all the way across the board on my flashed car.

By the way I went and submitted to the pressures of more power and picked up a pure stage 1. Awaiting delivery.

I know you were in the same boat, did you get yours? Did you bolt it up? I have to get with Enzo and see how they want me to set up map 6 with the JB4...

I cant wait. The stock PWG turbo is such shit...
I did!
I went with Enzo/JB4+Dinan, i reviewed it just yesterday!
You'll run out of asphalt before you run out of boost.
Yesssss! That's what I want to hear! Thank you. I'm gonna go find your review and splurge on the read
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