Thread: Turbo Boost PSI
View Single Post
      08-28-2011, 08:56 PM   #33
///M1
Brigadier General
///M1's Avatar
United_States
56
Rep
3,090
Posts

 
Drives: Many
Join Date: Feb 2009
Location: 212/305

iTrader: (1)

Garage List
Quote:
Originally Posted by RiXst3r View Post
Can't use a generic obd gauge to read boost on the n54... The map sensor on the manifold of the n54 is only good for 3.3psi or so... the 17 you see is not subtracting ambient pressure of 14.5(or so).... The T-map sensor before the throttle measure up to 22psi, the ECU reads both these and does a blend of the data.

On the n54 it's best to use a vacuum driven sensor (which is what we use for the p3cars.com gauge for the n54 and 1M)... otherwise you won't see vacuum and the throttle plate will create spikes to the sensor that are never seen in the manifold... makes for crappy peak recall!

The n55 on the other hand has a 22psi capable sensor on the manifold so obd data will show actual full boost.

We've sold a few gauges to 1M users... I am assuming they have been running them and should be able to report back actual boost,egt,coolant temp,AIT,0-60 times, etc... all the stuff the P3 gauge reads.

-Rick
Rick: just wanted to confirm, I can reuse the P3 off my 135i on the 1//M, right? I have the very first version. BTW, any chance for a 'trade-in' program to get the latest one? Thx!
__________________
2011 BMW E82 1///M: AW, ZPP+ZCV, HK, Apps; Akra CF+Valve control, MadDad mids, K&N, Forge FMIC, P3gauge, EuroTails, Tint, CF Mirrors+Spoiler+Roof+RevoZ diffuser, 10mm H&R, IND grills+gills, xCDV, LUX AE
2008 Audi B7 RS 4: Sprint Blue, Audi Exclusive Euro Interior, Premium+Titanium Package, EPL Tune, Stasis Ohlins MS coilovers, Milltek valved exhaust+DownPipes, Alcon BBK, Tint, ADR V1, Lidatek, Lamin-X, Strasse Forged SM7 3-piece concave wheels, 275/30/19 PSSs, Euro flat-bottom steering wheel, JHM SSK