Is 14.7psi too much for bone stock? COBB, v301 Sport map

Diggy Diggy · 10-22-2011, 02:24 PM

.

BQTuning · 10-22-2011, 02:32 PM

Well lets see, there is a guy I have raced multiple times and he is running JB4 on Map 5 that either peaks 14.5 psi or is running at 14.5 psi when he races me. He has had it from since when JB4 was first released. He reports no problems and he is bone stock.

Edit: To add, when I was first introduced to BMW tuning I had a friend from Miami who had a e90 2007 335i running JB3 on map 7 bone stock. The only thing he had was DCI.

335 oClock · 10-22-2011, 02:44 PM

I wouldn't do it

Beemw335 · 10-22-2011, 02:49 PM

WAY too aggressive. 13.5 is what you should be running...

tibra1 · 10-22-2011, 02:56 PM

Quote:

Originally Posted by Beemw335

WAY too aggressive. 13.5 is what you should be running...

+1..IMO u should not boost and leave the stock restrictions at all.

Bleep · 10-22-2011, 03:14 PM

Depends on where in the rev range.

rader1 · 10-22-2011, 03:23 PM

Quote:

Originally Posted by Spoolin

Just a simple question: Do you think 14.7psi is too much for: COBB v301 Sport map, 93oct, BMS drop in, 57degrees outside?

You're fine. Do some datalogs to confirm, but you really aren't running excessive boost and the drop-in is more than enough for what you need. But like i said, datalog to be sure.

Mike@N54Tuning.com · 10-22-2011, 04:13 PM

It's a little high, but as long as it tapers well in the high RPM band its okay. I would get some exhaust mods on there to open the engine up a bit and go for a proper Intake (DCI or equivalent)

Like mentioned above lets see your boost and timing curve so we can offer more car specific advice.

Mike

Jeff@TopGearSolutions · 10-22-2011, 04:14 PM

Depends where you see 14.7. 14.7 is not at all a big deal before 5000 RPM. If it was at redline then I would say something is not right.

Typical Stage 1 Cobb runes 14-15 PSI in the mid-range tapering to 12-13 PSI by redline.

Without logs your question is too broad.

Butters · 10-22-2011, 06:06 PM

Just a mild boost spike between shifts. Looks like an auto the ecu closed the throttle plate to regulate boost during the shift. The boost levels in your datalog look normal for a sport map with cool ambient temps.

enrita · 10-22-2011, 06:11 PM

Boost is only a part of the story of tuning...

Bleep · 10-22-2011, 06:22 PM

Boost looks fine in the datalog, you should be able to run aggressive on your setup pretty easily.

Brey335i · 10-22-2011, 06:37 PM

You're fine. Perfectly safe boost level down low. I used to run about 14.5 psi or so autotuned back in the day when I was stock.

chinesechicken · 10-25-2011, 10:09 PM

your fine. you still have a lot of room to move so you safe.

go with a DCI or CAI and you push it to 18 psi

secretsquirrel · 10-25-2011, 10:51 PM

Quote:

Originally Posted by chinesechicken

go with a DCI or CAI and you push it to 18 psi

Brey335i · 10-25-2011, 11:06 PM

Quote:

Originally Posted by chinesechicken

your fine. you still have a lot of room to move so you safe.

go with a DCI or CAI and you push it to 18 psi

And a FMIC and Downpipes...

Longboarder · 10-26-2011, 06:44 PM

Quote:

Originally Posted by Brey335i

And a FMIC and Downpipes...

...and meth.

Brey335i · 10-26-2011, 06:59 PM

Quote:

Originally Posted by Longboarder

...and meth.

Not necessary for COBB Stage 2+. In fact, running off the shelf COBB maps with meth makes the car run worse.

10-22-2011, 02:24 PM	#1
Diggy Diggy First Lieutenant 26 Rep 341 Posts Drives: 135i Join Date: Mar 2009 Location: Kentucky iTrader: (2) Garage List 2008 BMW 135i [0.00]	. . Last edited by Diggy Diggy; 12-30-2012 at 11:56 PM..
	Appreciate 0 Tweet Quote

10-22-2011, 02:32 PM	#2
BQTuning Banned 475 Rep 4,392 Posts Drives: 2012 Z4 sDrive35i M Sport 6MT Join Date: Nov 2010 Location: bq@bqtuning.com iTrader: (0)	Well lets see, there is a guy I have raced multiple times and he is running JB4 on Map 5 that either peaks 14.5 psi or is running at 14.5 psi when he races me. He has had it from since when JB4 was first released. He reports no problems and he is bone stock. Edit: To add, when I was first introduced to BMW tuning I had a friend from Miami who had a e90 2007 335i running JB3 on map 7 bone stock. The only thing he had was DCI. Last edited by BQTuning; 10-22-2011 at 02:40 PM..
	Appreciate 0 Quote

10-22-2011, 02:44 PM	#3
335 oClock MOE 221 Rep 2,530 Posts Drives: 2011 e92 335i 6MT Join Date: Jun 2011 Location: Los Angeles iTrader: (13)	I wouldn't do it __________________ Duke Dynamics//Evolution Racewerks//LTBMW *335 oClocks Project Build//Photo Shoot*
	Appreciate 0 Quote

10-22-2011, 02:49 PM	#4
Beemw335 Colonel 62 Rep 2,013 Posts Drives: 335i Join Date: Mar 2011 Location: My car is my home iTrader: (2)	WAY too aggressive. 13.5 is what you should be running...
	Appreciate 0 Quote

10-22-2011, 03:14 PM	#6
Bleep First Lieutenant 9 Rep 369 Posts Drives: 3 Join Date: Jan 2011 Location: CT iTrader: (0)	Depends on where in the rev range.
	Appreciate 0 Quote

10-22-2011, 04:13 PM	#8
Mike@N54Tuning.com Joint Chiefs of Staff 5034 Rep 116,174 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	It's a little high, but as long as it tapers well in the high RPM band its okay. I would get some exhaust mods on there to open the engine up a bit and go for a proper Intake (DCI or equivalent) Like mentioned above lets see your boost and timing curve so we can offer more car specific advice. Mike
	Appreciate 0 Quote

10-22-2011, 04:14 PM	#9
Jeff@TopGearSolutions 3472 Rep 79,211 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	Depends where you see 14.7. 14.7 is not at all a big deal before 5000 RPM. If it was at redline then I would say something is not right. Typical Stage 1 Cobb runes 14-15 PSI in the mid-range tapering to 12-13 PSI by redline. Without logs your question is too broad.
	Appreciate 0 Quote

10-22-2011, 06:06 PM	#10
Butters Banned 4 Rep 82 Posts Drives: BMW Join Date: Mar 2011 Location: US iTrader: (3)	Just a mild boost spike between shifts. Looks like an auto the ecu closed the throttle plate to regulate boost during the shift. The boost levels in your datalog look normal for a sport map with cool ambient temps.
	Appreciate 0 Quote

10-22-2011, 06:11 PM	#11
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	Boost is only a part of the story of tuning... __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
	Appreciate 0 Quote

10-22-2011, 06:22 PM	#12
Bleep First Lieutenant 9 Rep 369 Posts Drives: 3 Join Date: Jan 2011 Location: CT iTrader: (0)	Boost looks fine in the datalog, you should be able to run aggressive on your setup pretty easily.
	Appreciate 0 Quote

10-22-2011, 06:37 PM	#13
Brey335i Banned 118 Rep 4,771 Posts Drives: e46 ///M3 Join Date: Oct 2009 Location: Austin, TX iTrader: (11)	You're fine. Perfectly safe boost level down low. I used to run about 14.5 psi or so autotuned back in the day when I was stock.
	Appreciate 0 Quote

10-25-2011, 10:09 PM	#14
chinesechicken S3X DR1VE 1 Rep 52 Posts Drives: 2009 E92 335i Coupe Join Date: Aug 2011 Location: NYC iTrader: (0)	your fine. you still have a lot of room to move so you safe. go with a DCI or CAI and you push it to 18 psi
	Appreciate 0 Quote