Normal boost for a stock 2001 TT
#16
the numbers of threads on "overboosting" causes and cures are too numerous to mention, but if a stock car were to regularly show 1.0+ on the dash guage then a vac leak and/or improperly adjusted wastegates ( not opening at their optimal psi..) might well be the cause. then there is the n75 which i mention as an afterthought..but it does "control" boost!
if you do a google search it probably will show the most recent rl and 6spd threads on the topic. there's one on this issue a cpl topics down and it was the owners faulty n75..so gl w it..
all that said, however..if you have an unknown tune/flash etc, then there would be your answer lol.
if you do a google search it probably will show the most recent rl and 6spd threads on the topic. there's one on this issue a cpl topics down and it was the owners faulty n75..so gl w it..
all that said, however..if you have an unknown tune/flash etc, then there would be your answer lol.
Last edited by "02996ttx50; 02-25-2017 at 09:30 AM. Reason: add
#17
Instructor
For what its worth, I've got a Cobb tune on my car with the AccessPort which has a bunch of cool stuff including gauges that read manifold pressure and target boost. The pressure read in the cluster rarely matches the manifold pressure. It may be measuring boost from a different place I'm not sure, but my belief is that the reading in the cluster is not 100% accurate. For instance, just cruising around giving a little gas the cluster reads .2-.3 bar whereas the MAP and target boost on AccessPort shows it right at 0.
#19
Race Car
The dash gauge boost display response is sloooow. I think it operates at a 1khz refresh rate, which means it can be showing a value that is no longer valid for 0.99 seconds. Not sure why they didn't at least have the same refresh on that as on the mph display.
Dan
Dan
#21
Drifting
EDIT: with that being said, the refresh rate using the torque app with a BT OBD-II is really fast and close to real time.
Last edited by RngTrtl; 02-27-2017 at 09:05 PM. Reason: more info
#22
Rennlist Member
#23
Race Car
Sorry, not sure how that k got in there. But seriously, try to vary the throttle some time and watch the boost gauge show you boost for almost 1 second when you are completely off the throttle.
Dan
Dan
#24
all of which has me thinking.. what percentage ( if any ) of boost spikes might be attributed to a displayed yet *inaccurate* reading from the gauge itself? they are after all, only .1's and sometimes a .2 over what we recognize as "normal".
possible?
possible?
#25
Instructor
Thread Starter
Hey guys... I kinda forgot to put an update on my problem... :
So, the N75 was simply disconnected. A well known member of this forum helped me to find the cause of that issue last year. It took him about 2 minutes to find out. Now I boost to 0.7 bar, sometimes 0.8, so everything is back to normal.
So, the N75 was simply disconnected. A well known member of this forum helped me to find the cause of that issue last year. It took him about 2 minutes to find out. Now I boost to 0.7 bar, sometimes 0.8, so everything is back to normal.