Those who have boost guages that read in "BAR"
Evolving Member
Joined: Jan 2002
Posts: 363
Likes: 0
From: Singapore
How's it going? What color is your E8? 
Anyway, here are my numbers, using Defi BF:
3rd and 4th gear: 1.2 bar held
5th and 6th gear: 1.3 bar held
Peak boost 1.4 bar, 1.5 bar with full load and A/C on.
Operating conditions:
Full tank of gas (Shell V-Power)
Temperature: 28 degrees C
Dew point: 24 degress C
Relative Humidity: 78%
Pressure: 29.83 in. Hg
Car is totally stock.
Anyway, here are my numbers, using Defi BF:
3rd and 4th gear: 1.2 bar held
5th and 6th gear: 1.3 bar held
Peak boost 1.4 bar, 1.5 bar with full load and A/C on.
Operating conditions:
Full tank of gas (Shell V-Power)
Temperature: 28 degrees C
Dew point: 24 degress C
Relative Humidity: 78%
Pressure: 29.83 in. Hg
Car is totally stock.
Originally posted by GDB
I don't think this is weird. Your description is very informative: peak boost varies according to gears. Higher load on the engine means you'll see higher peak boost, given all other things equal.
I'm still breaking in mine so I can't really vouch the numbers you just described, but have a friend who observed exactly the same numbers as yours.
BTW would be very informative for everyone to disclose:
Gear
Boost peak
Boost held
Peaking at 1.5bar tapering to 0.9bar at redline is VERY different from holding 1.5bar all the way to redline.
Also, IMHO the variations *could* partly be due to the MEASURING device. For e.g. I have heard numerous posts that say Defi boost gauges are over-optimistic on the boost readings. That is, a 1.5bar displayed on the Defi could be registered 1.35bar on a Blitz EBC digital read-out, or a diagnostics device (SECS).
Which number do you take? Personally I'd lean more towards readings off a diagnostics device, so numbers in Defi is a bit off.
All of above IMHO. Open for discussion but please don't flame
I don't think this is weird. Your description is very informative: peak boost varies according to gears. Higher load on the engine means you'll see higher peak boost, given all other things equal.
I'm still breaking in mine so I can't really vouch the numbers you just described, but have a friend who observed exactly the same numbers as yours.
BTW would be very informative for everyone to disclose:
Gear
Boost peak
Boost held
Peaking at 1.5bar tapering to 0.9bar at redline is VERY different from holding 1.5bar all the way to redline.
Also, IMHO the variations *could* partly be due to the MEASURING device. For e.g. I have heard numerous posts that say Defi boost gauges are over-optimistic on the boost readings. That is, a 1.5bar displayed on the Defi could be registered 1.35bar on a Blitz EBC digital read-out, or a diagnostics device (SECS).
Which number do you take? Personally I'd lean more towards readings off a diagnostics device, so numbers in Defi is a bit off.
All of above IMHO. Open for discussion but please don't flame
Evolving Member
Joined: Apr 2003
Posts: 249
Likes: 0
From: Sydney, Australia
Remembering that I drive an Evo 6, I hit 1.1 bar modified, but only ever so briefly. If I plant my foot in 1st/2nd/3rd, I'm redlining before I even get a chance to look at the boost guage!
If I plant my foot from say 40mph in 5th, then it slowly builds up to about 1.1-1.2 bar.
If I plant my foot from say 40mph in 5th, then it slowly builds up to about 1.1-1.2 bar.
Newbie
Joined: Jun 2003
Posts: 29
Likes: 0
From: Pennsylvania
My stock was 1.35 bars tappering to 1.25. I just installed the Exede with boost control, turboback exhaust and I am peaking at 1.45 bar and tappering to 1.4 to redline. I'm also only running the 91 octane map. The difference from stock is amassing.
Originally posted by Crufty Dusty
5th and 6th gear: 1.3 bar held
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Car is totally stock.
5th and 6th gear: 1.3 bar held
....................
....................
....................
Car is totally stock.
I wish we got the 6 speed tranny.
Originally posted by dEdiYT11
With my Profec E-01 and FCD, in 3rd 1.7bar (24.99psi) held, with NX-intercooler spray sometimes 1.8bar (26.46psi) held in 3rd or 4th gear
With my Profec E-01 and FCD, in 3rd 1.7bar (24.99psi) held, with NX-intercooler spray sometimes 1.8bar (26.46psi) held in 3rd or 4th gear
I wonder how much timing is being pulled at that much boost. I hope that nobody in here ever runs over 24 psi on the stock fuel system.
Perhaps your setup has some degree of inacuracy?
Perhaps your setup has some degree of inacuracy?
You're getting more boost at lower gears that is strange, usually it's the other way around, is your car stock?
To answer your question I'm getting -.62 vacuum at idle once the car is warmed up. Anyone else want to chime in with their idle vaccuum on their Blitz DTT? I think mine is a bit high.
To answer your question I'm getting -.62 vacuum at idle once the car is warmed up. Anyone else want to chime in with their idle vaccuum on their Blitz DTT? I think mine is a bit high.
Newbie
Joined: Jan 2003
Posts: 98
Likes: 0
Originally posted by ericomundo
Actually 1 bar = 14.503 ... hey, that 0.005 makes all the difference
btw, here's a nice site for conversions:
http://www.cis-online.co.za/tables/pconvsgtab.htm
Actually 1 bar = 14.503 ... hey, that 0.005 makes all the difference
btw, here's a nice site for conversions:
http://www.cis-online.co.za/tables/pconvsgtab.htm
Rounding off to 5 significant digits 1 bar is equal to 14.504 PSI. To 9 significant digits it's equal to 14.5037738.