Some weird boost behavior (more)
08-08-2003, 10:27 AM
#21
Elder Member
Join Date: Feb 2003
Posts: 12,788
Likes: 0
Received 0 Likes
on
0 Posts
When flooring it below 4.5K, the boost spike over 20 psi (~22)...
then it smacks down to about 15-16 psi and the throttle cuts.
We have no boost leaks, our cars run fine on other chips.
We have no boost leaks, our cars run fine on other chips.
08-08-2003, 10:35 AM
#23
Elder Member
Join Date: Feb 2003
Posts: 12,788
Likes: 0
Received 0 Likes
on
0 Posts
I am guessing that many more have the problem, but it is hard to tell without seeing boost...
I noticed it on my gauge, or else I really couldn't have felt a major difference. I guess my butt dyno sucks, huh?
08-08-2003, 10:40 AM
#24
Member
Join Date: Mar 2000
Posts: 4,109
Likes: 0
Received 0 Likes
on
0 Posts
How do you know the throttle cuts?
H, M and T ECUs will not cut the throttle even at 1.65bar (24 psi) of sustained boost if the differential between actual and requested is "acceptable".
Do you have boost logs and throttle logs correlating to this symptom?
Sorry to question both of you, but we have installed hundreds of these chips, and dynoed dozens of them, and have not seen this issue.
Do you have boost logs and throttle logs correlating to this symptom?
Sorry to question both of you, but we have installed hundreds of these chips, and dynoed dozens of them, and have not seen this issue.
08-08-2003, 10:43 AM
#26
Member
Join Date: Mar 2000
Posts: 4,109
Likes: 0
Received 0 Likes
on
0 Posts
That is not necessarily "overboost" from the chip program.
Lots of things can cause that issue, like a leak in the intake system. The ECU then can be requesting more boost to try affect actual boost production, which can lead to "overboost".
However, that is not a fault of the chip.
What Mike is describing sounds different, anyway.
However, that is not a fault of the chip.
What Mike is describing sounds different, anyway.