JB4 owners...

bmwm3redblack · 05-15-2011, 12:22 PM

i am wondering what was the max boost?0-60/1/4 time? with jb4 map5 autotunung using 93 octane?
I know it's depends on elevation and etc,but in general. Max psi,0-60;1/4 time and mods you've got!!!
Much appreciate your answers!!!

ianthegreat · 05-15-2011, 12:24 PM

it's going to fluctuate.. car to car, elevation, situation..

Syndicategt · 05-15-2011, 01:26 PM

Also will vary with mods. If you are tune only with 93 oct, expect to see roughly 13-15 psi.

bmwm3redblack · 05-15-2011, 01:35 PM

Amd if i got catless downpipes and dci? Could i expect the same psi as cobb offers?

Syndicategt · 05-15-2011, 01:37 PM

Quote:

Originally Posted by bmwm3redblack

Amd if i got catless downpipes and dci? Could i expect the same psi as cobb offers?

With autotuning on your car will be putting out the correct amount of boost for the current situation. With the Cobb, it will run the preset settings for that specific map. Boost will go up and down while autotuned, so yes, at times you may boost higher with cobb. I beleive Cobb stage 1 will only boost to 16 psi, you can get your JB4 up to 17-18 psi safely with the correct mods, meth, and race gas. But don't go messing with map settings if you do not know what you are doing, you could potentially damage something.

Naptime · 05-15-2011, 06:12 PM

With a JB4 (map 2), Racelands, DCI and some 110 octane racegas I ran a 12.9 @ 112. I was on stock 18's with RFTs and no weight reduction.

Bcruskie · 05-16-2011, 08:21 AM

Im at sea level more or less, map 1 peaked at 16psi with consistant reading of 13.5-14psi on 94 octane and K&N drop in. I find Map 1 is very close to Map 2.
On my experience, Map 1 is just as fast without feel of being rear-ended with WOT, comparing to Map 2. Map 2 is good for drifting i find.

bmwm3redblack · 05-16-2011, 11:01 AM

any other expirience with 93 octane map 5(autotunung)????

Naptime · 05-16-2011, 11:20 AM

Quote:

Originally Posted by bmwm3redblack

any other expirience with 93 octane map 5(autotunung)????

Daily driving on Map 5 on a 70/30 93/E85 mix, I have seen between 11 and 14 psi. Map 5 is a great map for daily driving and I switch to map 2 when I head to the track. I'm going to try and hit the strip in the next few weeks and I'm going to run some racegas and give map 7 a whirl.

05-15-2011, 12:22 PM	#1
bmwm3redblack Captain 63 Rep 886 Posts Drives: BMW ///M3 E46, BMW E92 335Xi Join Date: Jan 2011 Location: e13 osl iTrader: (0)	JB4 owners... i am wondering what was the max boost?0-60/1/4 time? with jb4 map5 autotunung using 93 octane? I know it's depends on elevation and etc,but in general. Max psi,0-60;1/4 time and mods you've got!!! Much appreciate your answers!!! Last edited by bmwm3redblack; 05-15-2011 at 01:34 PM..
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05-15-2011, 12:24 PM	#2
ianthegreat Colonel 63 Rep 2,314 Posts Drives: n54 Join Date: Apr 2008 Location: Pittsburgh/Houston iTrader: (1)	it's going to fluctuate.. car to car, elevation, situation..
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05-15-2011, 01:26 PM	#3
Syndicategt Brigadier General 164 Rep 3,730 Posts Drives: 335i Join Date: Sep 2009 Location: Nor Cal iTrader: (11)	Also will vary with mods. If you are tune only with 93 oct, expect to see roughly 13-15 psi. __________________ 2008 BMW 335i e90 - Sold - Rob Beck Turbos / PROcede V5 / Aquamist HFS-4 / AR Downpipes / AE Exhaust / ER Comp FMIC / ER CP / TiAL BOV / Custom Intake / RPI Scoops / Quaife LSD / Swift-Koni Coilovers / DSS HS / Morr VS8.2 Sig Black / Michelin PSS / P3 Boost Guage / M3 body / M3 steering wheel / Adam's Rotors / Hawk HPS / SS lines /
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05-15-2011, 01:35 PM	#4
bmwm3redblack Captain 63 Rep 886 Posts Drives: BMW ///M3 E46, BMW E92 335Xi Join Date: Jan 2011 Location: e13 osl iTrader: (0)	Amd if i got catless downpipes and dci? Could i expect the same psi as cobb offers?
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05-15-2011, 06:12 PM	#6
Naptime #Hashtag 10 Rep 245 Posts Drives: around in circles Join Date: Jan 2011 Location: South Texas iTrader: (1)	With a JB4 (map 2), Racelands, DCI and some 110 octane racegas I ran a 12.9 @ 112. I was on stock 18's with RFTs and no weight reduction.
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05-16-2011, 08:21 AM	#7
Bcruskie Private First Class 2 Rep 129 Posts Drives: 2007 e92 Join Date: Mar 2010 Location: Vancouver BC iTrader: (2)	Im at sea level more or less, map 1 peaked at 16psi with consistant reading of 13.5-14psi on 94 octane and K&N drop in. I find Map 1 is very close to Map 2. On my experience, Map 1 is just as fast without feel of being rear-ended with WOT, comparing to Map 2. Map 2 is good for drifting i find.
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05-16-2011, 11:01 AM	#8
bmwm3redblack Captain 63 Rep 886 Posts Drives: BMW ///M3 E46, BMW E92 335Xi Join Date: Jan 2011 Location: e13 osl iTrader: (0)	any other expirience with 93 octane map 5(autotunung)????
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