Where did you plumb your boost controller into ? UIM is no good !
03-24-2009, 08:33 AM
#109
I didn't find that the anti stall fitting worked so well. In theory I don't find fault with it, but in practice it didn't make the car drive as well as when it was recirculated.
04-26-2009, 08:11 PM
#111
Bit of an update on this .
I decided that I wanted to go back to plumbing my BC off the UIM because I got sick of the "overboost" light and beeper going off on my Greddy profec BC .
So - i put it back . Straight away I saw some serious pressures before the throttle plate at partial throttle . NOT GOOD !
After reading the Syncrhonic BOV information I decided I should try and rectify this with the BOV i already have seeing as how i'm short on $ ATM .
With these two measures I have been able to cut down my max. boost behind the throttle to below 15psi under all conditions.
1/ Significantly reduced the spring tension on my BOV such that it almost opens at idle .
2/ Adjusted the "SET GAIN" (IE controller on start pressure) value on the BC down to around 4psi . Any higher than this and you will have a problem because the UIM does not see nearly as much pressure as before the throttle under partial throttle and as your BC wont start operating your wastegate will be completely shut .
I decided that I wanted to go back to plumbing my BC off the UIM because I got sick of the "overboost" light and beeper going off on my Greddy profec BC .
So - i put it back . Straight away I saw some serious pressures before the throttle plate at partial throttle . NOT GOOD !
After reading the Syncrhonic BOV information I decided I should try and rectify this with the BOV i already have seeing as how i'm short on $ ATM .
With these two measures I have been able to cut down my max. boost behind the throttle to below 15psi under all conditions.
1/ Significantly reduced the spring tension on my BOV such that it almost opens at idle .
2/ Adjusted the "SET GAIN" (IE controller on start pressure) value on the BC down to around 4psi . Any higher than this and you will have a problem because the UIM does not see nearly as much pressure as before the throttle under partial throttle and as your BC wont start operating your wastegate will be completely shut .
09-13-2009, 06:08 PM
#115
Kane - you never tested this you slacker .
I'm still saying plugging your BC in before the throttle plate is a superior setup to after .
I get less boost at part throttle and better throttle control .
I briefly flirted with putting it back after the throttle plate but my throttle control went to **** so reverted back .
I'm still saying plugging your BC in before the throttle plate is a superior setup to after .
I get less boost at part throttle and better throttle control .
I briefly flirted with putting it back after the throttle plate but my throttle control went to **** so reverted back .
Last edited by Brettus; 09-13-2009 at 06:12 PM.
09-16-2009, 02:53 PM
#120
I doubt any of the serious people that are participating in this thread EVER do something because everybody else is doing it.
You can probably count on us to intentionally do it every other possible way for that very reason.
Plumbing the boost controller signal before the throttle is dumb on many, many levels.
You can probably count on us to intentionally do it every other possible way for that very reason.
Plumbing the boost controller signal before the throttle is dumb on many, many levels.
09-16-2009, 03:02 PM
#123
What kills me is that you are making the turbo less effective; we WANT a turbo to be producing the highest boost at all times without slowing down (outside of the Surge Range).
That is one of the reasons we have BOV's and boost controllers.... to allow the turbo to spin happily away while we tap into that extra airflow when we want it with the throttle.
By purposely fooling the BC by giving it a higher boost level than what is in the intake manifold your forcing the wastegate closed slowing the spool instead of just venting the air out of the intake tract - if you are having issue controlling boost threshold - fix your turbo, bov etc....
That is one of the reasons we have BOV's and boost controllers.... to allow the turbo to spin happily away while we tap into that extra airflow when we want it with the throttle.
By purposely fooling the BC by giving it a higher boost level than what is in the intake manifold your forcing the wastegate closed slowing the spool instead of just venting the air out of the intake tract - if you are having issue controlling boost threshold - fix your turbo, bov etc....
09-16-2009, 03:09 PM
#124
What kills me is that you are making the turbo less effective; we WANT a turbo to be producing the highest boost at all times without slowing down (outside of the Surge Range).
That is one of the reasons we have BOV's and boost controllers.... to allow the turbo to spin happily away while we tap into that extra airflow when we want it with the throttle.
By purposely fooling the BC by giving it a higher boost level than what is in the intake manifold your forcing the wastegate closed slowing the spool instead of just venting the air out of the intake tract - if you are having issue controlling boost threshold - fix your turbo, bov etc....
That is one of the reasons we have BOV's and boost controllers.... to allow the turbo to spin happily away while we tap into that extra airflow when we want it with the throttle.
By purposely fooling the BC by giving it a higher boost level than what is in the intake manifold your forcing the wastegate closed slowing the spool instead of just venting the air out of the intake tract - if you are having issue controlling boost threshold - fix your turbo, bov etc....
If I set "start boost" at say 8psi and set boost at say 10psi then i'll actually get 8 - 10 psi before the throttle plate (in all load situations)with my setup . If I plug into the UIM i'll get whatever the f**k the turbo wants to spool to (at partial throttle)- I saw up to 20psi before I got my BOV sorted .
Now imagine you are half way around a corner and you have 20psi before the throttle plate and you dial in more throttle . Guess what is going to happen .... BTW I have actually experienced this and as far as I can tell you (nor MM) have not so maybe I might have a clue - maybe .
I would agree that you can control any excess boost with your BOV and thus prevent the above scenario but only a few top of the line BOVs will do this . Most BOVs are not going to control it and the result at best is a very touchy throttle and at worst a very nasty accident .
Last edited by Brettus; 09-16-2009 at 03:57 PM.
09-16-2009, 05:45 PM
#125
I divide by zero
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hmm..so how would I setup my BC with my Synapse WG ? With this one it makes use of the same port even with a BC. They dont recommend using a secondary port ont he WG to hook up a BC.
http://synapseengineering.com/smf/in...54&topic=434.0
So would I want to use my signal right after the turbine..or the UIM signal ?
http://synapseengineering.com/smf/in...54&topic=434.0
So would I want to use my signal right after the turbine..or the UIM signal ?