help an Audi driver with a boost question!

[landwomble]

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]

2.5 bar 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]

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]

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]

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]

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]

connect a boost guage up dude, thatll tell you whats going down and well know if its boosting correctly or not

 

[cupra_r_ick]

or, just turn the ignition on and see what its reading then. if its 0, your boosting mad, if its 1. happy days

 

[landwomble]

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

 

[cupra_r_ick]

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]

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]

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 lol think your right tho rick im still not sure on logs trying to get my head round the whole thing atm lol

 

[Pyro]

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]

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]

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]

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...!