Manual Boost Controller Maxed Out
#1
Junior Member
Thread Starter
Join Date: Oct 2004
Location: closer
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
Manual Boost Controller Maxed Out
I have one of those cockpit adjustable Hallman manual boost controllers...it works great, problem is I can't keep the boost in check in cold nights even with it dialed all the way back (that's how I popped my first motor)....I'm creeping past 14 with the midpipe
any options, aside from just upgrading to a profec b? is that THE solution? will larger diameter vacuum lines help increase pressure in the wastegate actuator line and decrease boost?
any options, aside from just upgrading to a profec b? is that THE solution? will larger diameter vacuum lines help increase pressure in the wastegate actuator line and decrease boost?
#3
12th son of the lama
Join Date: May 2003
Location: albany, ny
Posts: 823
Likes: 0
Received 0 Likes
on
0 Posts
a profec b will not control boost creep since it works on the same principle as a manual boost controller. you need to port your waste gate when you run a mid pipe if you want to control creep. the problem is that your waste gate is not big enough and can not flow enough air to control your boost. search waste gate porting and you'll see what i'm talking about.
#5
Junior Member
Thread Starter
Join Date: Oct 2004
Location: closer
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
I shouldn't have mentioned the word "creep", I knew that would throw people off....the creep is not that bad at all
the real problem is I get almost 14, like NOW, immediately, in 2nd and 3rd on a cold night, which means I will get more than 14 in 4th, because 4th always gives you an extra 0.5 psi
wasegate porting is not an option right now anyway, I need to control instantaneous boost
I'm running a Pettit ECU
the real problem is I get almost 14, like NOW, immediately, in 2nd and 3rd on a cold night, which means I will get more than 14 in 4th, because 4th always gives you an extra 0.5 psi
wasegate porting is not an option right now anyway, I need to control instantaneous boost
I'm running a Pettit ECU
Last edited by the ancient words; 10-16-04 at 12:27 PM.
#6
Mr. Links
iTrader: (1)
The phase "creep" doesn't really mean the boost will come on slow. However, if the boost goes up to 14 and doesn't come back down, then that's "boost creep".
If it's a spike, the boost will go up to 14 (or where ever it spikes to) and then back down to your pre-set boost setting. The bost is not going back down after the spike, then it's not a spike, it's creep.
If it's a spike, the boost will go up to 14 (or where ever it spikes to) and then back down to your pre-set boost setting. The bost is not going back down after the spike, then it's not a spike, it's creep.
Trending Topics
#8
Junior Member
Thread Starter
Join Date: Oct 2004
Location: closer
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
I'm well aware of what creep and spike are....it goes to 14 and is rock solid with very clight creep, so this is more of a overall overboost issue, at least for the Pettit ECU....relief valve may be part of the solution
#9
12th son of the lama
Join Date: May 2003
Location: albany, ny
Posts: 823
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by the ancient words
wasegate porting is not an option right now anyway, I need to control instantaneous boost
I'm running a Pettit ECU
#13
i might be wrong but i think what people are trying to say is that with the MBC dialed all the way down it would be really unlikely that you'll get 14psi. I would suggest try running a straight line and see what kind of psi your are getting. I think stock was like 7 psi? and work from there
#14
Junior Member
Thread Starter
Join Date: Oct 2004
Location: closer
Posts: 6
Likes: 0
Received 0 Likes
on
0 Posts
problem FIXED (wish everything were this easy)
I swapped out the vacuum lines between the actuator solenoid and the boost controller (which is basically a glorified pressure relief valve and needle valve) with larger I.D. lines and boom....right back in the middle of the "window" of adjustment....awesome....rock solid 13 psi with very slight creep
I didn't think the vacuum line I.D. made that big of a difference in the pressure signal!
I swapped out the vacuum lines between the actuator solenoid and the boost controller (which is basically a glorified pressure relief valve and needle valve) with larger I.D. lines and boom....right back in the middle of the "window" of adjustment....awesome....rock solid 13 psi with very slight creep
I didn't think the vacuum line I.D. made that big of a difference in the pressure signal!
Last edited by the ancient words; 10-16-04 at 09:26 PM.
Thread
Thread Starter
Forum
Replies
Last Post
Skeese
Adaptronic Engine Mgmt - AUS
65
03-28-17 03:30 PM