stock boost on turbo 08 535i?
04-14-2010, 07:57 PM
#3
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My Ride: 2011.5 Alpine White E90 M3 | Black Novillo Leather | Carbon Fiber Leather Trim | ZCP | ZP2 | M-DCT | Navigation | Moonroof | 6FL Mods: TMS 12.5mm spacers all around l Hawk HPS Brake Pads l OEM M3 Edition Grills l Paint Matched Side Gills l Key Hole D
7-9psi depending on weather and elevation...
04-15-2010, 10:09 AM
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My Ride: 2011.5 Alpine White E90 M3 | Black Novillo Leather | Carbon Fiber Leather Trim | ZCP | ZP2 | M-DCT | Navigation | Moonroof | 6FL Mods: TMS 12.5mm spacers all around l Hawk HPS Brake Pads l OEM M3 Edition Grills l Paint Matched Side Gills l Key Hole D
as the boost goes up, timing and fuel pressures also needs to be controlled to prevent knock events or limp codes/over heating the turbos....
the jb+ which attaches to the tmap sensor, none of the mentioned controls above with it, raise boost to 10-13 psi IIRC.
with the jb3 and other ecu tunes, the boost has been noted to go as high as +17 psi IIRC on 335's (depending on maps, i think jb3 v2 has been reported to even hit 18 psi)
I think on on flashes (GIAC, ESS, etc..) boost has been logged on their S1's to be 13-15 psi's IIRC....
ecu and flashes are safer on the turbos as fuel pressures and timing is controlled better....
in terms of safety: Flash>piggyback IMO
***obviously with the higher psi's you'd like to have better bolt-on aftermarket parts to help such as an FMIC (not available for 535's), DP's, and better flowing exhaust systems...
***more info and research can be done/found on n54tech.com or e90posts: the FI section
04-15-2010, 03:52 PM
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My Ride: 2008 535i: June 6th start build, complete June 17th, at NY Port July 5th, at dealer July 10th, took delivery Friday July 13- Plantimum Bronze/Natural Brown Leather/Light Poplar, Sport Package, Sport Auto, Active Steering, Premium Package, CWP & PDC. Dinan Performance Software 384hp & 421 ft/lbs.
Dinan which comes with a 50000 mile 48 month warranty maxes out at 13.0 from the stock 8.8 psi
04-15-2010, 04:11 PM
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04-16-2010, 08:20 AM
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My Ride: 2010 VW Passat Wagon 2.0l Tsi
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and the key one $2000 .....plus tax 
04-16-2010, 04:46 PM
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My Ride: 2008 535i: June 6th start build, complete June 17th, at NY Port July 5th, at dealer July 10th, took delivery Friday July 13- Plantimum Bronze/Natural Brown Leather/Light Poplar, Sport Package, Sport Auto, Active Steering, Premium Package, CWP & PDC. Dinan Performance Software 384hp & 421 ft/lbs.