help an Audi driver with a boost question!

landwomble

Guest
Aw, crap. Always something...I'll try it with the APR stage 1 turned off (got the cruise control switch to turn off option) and see what it reads. probably back to Awesome GTI after that, then...
 

Pyro

Guest
2.5 bar :-o :drive2: your map sensor should be chucking you into limp mode at that what N75 u got? standared? can you log request vs acutal boost to see if its not just a dogey gauge??
 

cupra_r_ick

Active Member
Jan 29, 2011
1,076
3
i cant remember what stage 1 runs at, but 2.5 bar is like 35 ish psi. that sounds mega high.
what does it hold (boost wise)
 

landwomble

Guest
Forge 007p DV. I think that the above logs *do* show requested vs actual boost, don't they? I just did a vag-com log of the blocks suggested...happy to be corrected if I'm reading it wrong?
 

cupra_r_ick

Active Member
Jan 29, 2011
1,076
3
correct me if im wrong, but is that not 2.5 bar, so only really 1.5 bar of boost ? seeing as were always at 1? i bet at idle its about 1 bar, or there abouts
 

landwomble

Guest
correct me if im wrong, but is that not 2.5 bar, so only really 1.5 bar of boost ? seeing as were always at 1? i bet at idle its about 1 bar, or there abouts
Would also explain the lower readings I get with a bluetooth dongle and Torque app on android...
This is exactly the kind of stuff i need to know, if the readings are absolute rather than relative then it's all good I guess? HEEEEELP!

P.S. Cheers guys. You're pretty darn responsive and helpful on here.
 

cupra_r_ick

Active Member
Jan 29, 2011
1,076
3
connect a boost guage up dude, thatll tell you whats going down and well know if its boosting correctly or not
 

cupra_r_ick

Active Member
Jan 29, 2011
1,076
3
or, just turn the ignition on and see what its reading then. if its 0, your boosting mad, if its 1. happy days
 

landwomble

Guest
good points guys, thanks. Don't suppose anyone knows for definite if VCDS reads boost relative to atmospheric or absolute?
 

cupra_r_ick

Active Member
Jan 29, 2011
1,076
3
its atmospheric im sure. so you got nothing to worry about . cant imagine you having a bar of boost at 2.3k lol !! if you had 2.5 bar of boost it would be rapid lol
 

landwomble

Guest
thank f*** for that, I'm waiting for the car to come back after having the power steering fixed and a misfire sorted (coil packs) and was just looking back at these logs going "hang on a second..."...!

Will read it to check but guess you're right - 1 bar at 800rpm seems a little unlikely...!
 

Pyro

Guest
2.5 bar is 36.26 psi ;) if you were spiking at that you would of blown it up by naw ;) lol i didnt even think to look above :doh: lol think your right tho rick im still not sure on logs trying to get my head round the whole thing atm lol
 

Pyro

Guest
just looked and its messured in mbar witch i think is the same principle as mm and meters if you know what i mean ;)
 

landwomble

Guest
hahahaa, OK, I feel better about it all now.

P.S. have you guys all come across Torque on Android? Kind of live VCDS-lite on your phone using a 15 quid bluetooth dongle plugged into your ODBII port? If you've not come across it it's bloody marvellous...
 

Pyro

Guest
yea we have mate theres a massive thread about it on here ;) its really good tho the iphone one is megga bucks tho :( lol
 

landwomble

Guest
Cool. I ended up being the Torque evangelist on the TT forum. Frigging great app, it was my logs to the dev that got boost reading on VAG cars working...!
 
Lecatona HPFP (High-pressure Fuel Pump Upgrades)