Maximum boost with BMW Performance Power Kit

cstavaru · 10-17-2010, 09:56 AM

Since installing the Rixter vent gauge I have tried to get a maximum boost reading and today I have managed to get a rather high 11psi (gauge was calibrated). Some people said that the stock 8.8psi is increased by about 1psi, but 11psi is kind of cool. The 297whp I got on the dyno can be fully explained with this kind of boost.

I'm curious if someone measured more than 8.8psi on a completely stock car ? I am at 100-150m above sea level.

Park2670 · 10-17-2010, 10:00 AM

Quote:

Originally Posted by cstavaru

Since installing the Rixter vent gauge I have tried to get a maximum boost reading and today I have managed to get a rather high 11psi (gauge was calibrated). Some people said that the stock 8.8psi is increased by about 1psi, but 11psi is kind of cool. The 297whp I got on the dyno can be fully explained with this kind of boost.

I'm curious if someone measured more than 8.8psi on a completely stock car ?

I have! I saw around ~10 psi on my stock 335i.

Of course I was at 5200 Feet elevation

fastloop · 10-17-2010, 11:08 AM

You may see boost spikes during gear shifts, so its depends on what the conditions where when you "recorded" this.

scottp999 · 10-17-2010, 11:14 AM

Quote:

Originally Posted by 335rocks

You may see boost spikes during gear shifts, so its depends on what the conditions where when you "recorded" this.

That is correct. I have my tune set at max PSI of 17 with 93 octane and meth. If I run through one gear with no DTC intervention then I see a peak recall of 16.9-17.1 PSI on Rick's boost gauge. If I slip the wheels to get DTC intervention, and/or shift gears, I will see spikes up to about 1 PSI higher. The engine actually does not see that spike, but gets recorded as a spike in the manifold pressure, and reflected on the electronic gauge peak recall.

Mr. 5 · 10-17-2010, 12:23 PM

Hs it been hot lately in your neck of the woods?
I'm curious if the car is running higher boost to compensate for the heat.
Or, I believe that the others are correct with the boost spiking between gear shifts.

enrita · 10-17-2010, 12:37 PM

peak recall on boost spikes when shifting

cstavaru · 10-17-2010, 01:39 PM

Quote:

Originally Posted by Mr. 5

Hs it been hot lately in your neck of the woods?
I'm curious if the car is running higher boost to compensate for the heat.
Or, I believe that the others are correct with the boost spiking between gear shifts.

Probably a spike, the temperature was in fact quite low at 8-10 degrees Celsius.

BrianMN · 10-17-2010, 01:42 PM

I can consistently sustain 11psi on hot days

10-17-2010, 09:56 AM	#1
cstavaru Brigadier General 314 Rep 3,262 Posts Drives: 2009 335i M Sport Sedan 6MT Join Date: Aug 2008 Location: Bucharest, Romania iTrader: (0)	Maximum boost with BMW Performance Power Kit - a bit of a surprise ? Since installing the Rixter vent gauge I have tried to get a maximum boost reading and today I have managed to get a rather high 11psi (gauge was calibrated). Some people said that the stock 8.8psi is increased by about 1psi, but 11psi is kind of cool. The 297whp I got on the dyno can be fully explained with this kind of boost. I'm curious if someone measured more than 8.8psi on a completely stock car ? I am at 100-150m above sea level. __________________ Mods(click): Cobb + RB Turbos \| Aquamist HFS-4 Meth \| Drexler LSD \| Bilstein B12 Pro-Kit \| Custom K&N Apollo Intake \| Wagner Intercooler \| Macht Schnell Downpipes \| BMW Performance Power Kit \| BMW Performance Exhaust \| BMW Performance Short Shifter \| M3 Subframe Bushings \| Last edited by cstavaru; 10-17-2010 at 10:05 AM..
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10-17-2010, 11:08 AM	#3
fastloop Lieutenant 40 Rep 522 Posts Drives: E92 335i M Sport Join Date: Sep 2008 Location: UK iTrader: (0)	You may see boost spikes during gear shifts, so its depends on what the conditions where when you "recorded" this.
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10-17-2010, 12:23 PM	#5
Mr. 5 Modder Raider 759 Rep 8,633 Posts Drives: M3 Join Date: Apr 2007 Location: Surf City, HB iTrader: (31) Garage List 2007 e90 335i [8.00]	Hs it been hot lately in your neck of the woods? I'm curious if the car is running higher boost to compensate for the heat. Or, I believe that the others are correct with the boost spiking between gear shifts. __________________ e36 M3 Coupe, e36 325i Sedan e90 335i--SOLD Best 60-130-------------9.15 Seconds------------------WWW.MR5RACING.COM
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10-17-2010, 12:37 PM	#6
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	peak recall on boost spikes when shifting __________________ 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
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10-17-2010, 01:42 PM	#8
BrianMN Banned 114 Rep 2,428 Posts Drives: 4 Door Family Sedan Join Date: Sep 2009 Location: Minneapolis iTrader: (7)	I can consistently sustain 11psi on hot days
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