zebedee Posted January 31, 2009 Posted January 31, 2009 Thanks m8 for doing my de-cat today Brilliant job....... I have found the restrictor, will put it in tomorrow, that hesitation I had cleared up a little and was only doing it if it hit overboost.
stum450n Posted January 31, 2009 Posted January 31, 2009 ...and my thanks for coming straight to doing a decat to mine to do the cambelt... well, almost! Zebedee, by all accounts, yours sounds awesome now!
Big 'D' Posted January 31, 2009 Posted January 31, 2009 Zebedee said: Thanks m8 for doing my de-cat today Brilliant job....... I have found the restrictor, will put it in tomorrow, that hesitation I had cleared up a little and was only doing it if it hit overboost. You are very welcome mate. Did your Forge DV hiss on the way home? Or did the modification help Once you get that restrictor in the overboost should stop mate, make sure the hole in the restrictor is as close to 1mm internal diameter as possible, any issues just let me know mate and I will assist you in any way I can. Cheers Iain
zebedee Posted January 31, 2009 Author Posted January 31, 2009 Big said: You are very welcome mate.Did your Forge DV hiss on the way home? Or did the modification help Once you get that restrictor in the overboost should stop mate, make sure the hole in the restrictor is as close to 1mm internal diameter as possible, any issues just let me know mate and I will assist you in any way I can. Cheers Iain The dump valve mod worked very well thank you no hissing, oh I also have turbo chatter as well now Thanks for all your help, very much appreciated. If I have time tomorrow I will check to see what ECU I have, if it has been changed.
zebedee Posted January 31, 2009 Author Posted January 31, 2009 stum450n said: ...and my thanks for coming straight to doing a decat to mine to do the cambelt... well, almost! Zebedee, by all accounts, yours sounds awesome now! Thanks m8 It does sound awesome, nearly as loud as Edmondo's now
Big 'D' Posted January 31, 2009 Posted January 31, 2009 Zebedee said: Thanks m8 It does sound awesome, nearly as loud as Edmondo's now Great result mate Cheers Iain
zebedee Posted February 1, 2009 Author Posted February 1, 2009 Put the restrictor in today, it has reduced boost to 1.2bar now but still over boosting, I put it in the very bottom pipe, one that leads to my induction kit? I think the hole in the restrictor is bigger than 1mm, so while I am at work tonight I will make one with a 1mm hole in it and try that. If I can't stop it over boosting what would be my best thing to do next? maybe that little gizmo you have in your STi?
Big 'D' Posted February 1, 2009 Posted February 1, 2009 Zebedee said: Put the restrictor in today, it has reduced boost to 1.2bar now but still over boosting, I put it in the very bottom pipe, one that leads to my induction kit?I think the hole in the restrictor is bigger than 1mm, so while I am at work tonight I will make one with a 1mm hole in it and try that. If I can't stop it over boosting what would be my best thing to do next? maybe that little gizmo you have in your STi? A smaller restrictor will help reduce the boost again, the Apexi boost controller I have is great as you can set it up to any boost level you want and leave it to sort it own life out If you are popping over for out next meet mate there are a couple of other things that can be done to help with overboost. Cheers Iain
zebedee Posted February 1, 2009 Author Posted February 1, 2009 Big said: A smaller restrictor will help reduce the boost again, the Apexi boost controller I have is great as you can set it up to any boost level you want and leave it to sort it own life out If you are popping over for out next meet mate there are a couple of other things that can be done to help with overboost. Cheers Iain I will have to see how I stand at work before I can say if I will be over for defo, but I will find out during the week. I think it would be a good thing to go down the route of a apexi boost controller rather than the manual thingie..... Thanks Big D, you are a top banana.......
zebedee Posted February 2, 2009 Author Posted February 2, 2009 Good news Big D, 1mm restrictor fitted and over boost and hesitation cured Bad news is it is only pulling 0.9 bar in any gear, and very slow at getting there. Do you think I may need to adjust the arm on the actuator?
Big 'D' Posted February 2, 2009 Posted February 2, 2009 Zebedee said: Good news Big D, 1mm restrictor fitted and over boost and hesitation cured Bad news is it is only pulling 0.9 bar in any gear, and very slow at getting there. Do you think I may need to adjust the arm on the actuator? Perhaps mate, take it in a turn at a time probably no more than 2 turns as you only backed it off one, or if that does not work you can adjust the hole out @ 0.1 mm at a time until you get 1.0/1.1 bar. If you are not sure I would be happy to help you set it up, but I am sure you will manage mate Cheers Iain
zebedee Posted February 2, 2009 Author Posted February 2, 2009 Big said: Perhaps mate, take it in a turn at a time probably no more than 2 turns as you only backed it off one, or if that does not work you can adjust the hole out @ 0.1 mm at a time until you get 1.0/1.1 bar. If you are not sure I would be happy to help you set it up, but I am sure you will manage mate Cheers Iain I was also thinking about 2 turns should do it, but will try it one at a time, when I can get the bonnet open too much snow on it I also noticed Andy Forrest is doing Power FC for my car fitted and mapped for £695, I think that might be a good way to go if I can get some overtime in If I don't manage m8 I will give you a shout Thanks again.
the_1 Posted February 2, 2009 Posted February 2, 2009 to increase boost with the restrictor you make the hole smaller so it takes longer to fill the waste gate actuator to reduce boost you make the hole larger
zebedee Posted February 2, 2009 Author Posted February 2, 2009 the_1 said: to increase boost with the restrictor you make the hole smaller so it takes longer to fill the waste gate actuator to reduce boost you make the hole larger If that is the case m8, why does it hit boost of 1.3bar with no restrictor? hence all the over boost I was getting, but with a 1mm restrictor I get 0.9bar. I have to be honest I don't fully understand the workings of the boost solenoid.
Big 'D' Posted February 2, 2009 Posted February 2, 2009 the_1 said: to increase boost with the restrictor you make the hole smaller so it takes longer to fill the waste gate actuator to reduce boost you make the hole larger That is correct for a 2 port but not a 3 port mate as it works in almost the opposite way. In the 2 port system the restrictor creates a pressure drop so that 'correctly said' it takes longer for the wastegate to feel the pressure but it is the effect it has on the amount of air bled away during the duty cycle of the solenoid that alters your boost, the smaller the hole you have the easier it is for the solenoid to dump the servo air and prevent the wastegate from opening which increases boost on the other hand if you make the hole bigger it reduces the efficiency of the solenoid so more pressure is allowed to build up in the wastegate earlier which reduces overall boost output. Also the restictor pill is located in the small pipe between the turbo outlet and the 't' piece. In the 3 port system the restrictor is in the line that returns to your intake pipe (post maf) here it plays a totally different role by reducing the hole size you are allowing more pressure to remain in the system which will be felt at the actuator earlier which reduces boost output then obviously when it is made bigger you allow for a better bleed and less pressure build up allowing for more boost. If the actuator arm adjustment does not bring your boost back up, enlarge the hole by 0.1mm increments until the boost = 1.0 - 1.1 BAR mate, that adjustment is correct for your system. I stand to be corrected !!!!!!!!!!!!!!!!!!! Cheers Iain
zebedee Posted February 2, 2009 Author Posted February 2, 2009 Big said: That is correct for a 2 port but not a 3 port mate as it works in almost the opposite way.In the 2 port system the restrictor creates a pressure drop so that 'correctly said' it takes longer for the wastegate to feel the pressure but it is the effect it has on the amount of air bled away during the duty cycle of the solenoid that alters your boost, the smaller the hole you have the easier it is for the solenoid to dump the servo air and prevent the wastegate from opening which increases boost on the other hand if you make the hole bigger it reduces the efficiency of the solenoid so more pressure is allowed to build up in the wastegate earlier which reduces overall boost output. Also the restictor pill is located in the small pipe between the turbo outlet and the 't' piece. In the 3 port system the restrictor is in the line that returns to your intake pipe (post maf) here it plays a totally different role by reducing the hole size you are allowing more pressure to remain in the system which will be felt at the actuator earlier which reduces boost output then obviously when it is made bigger you allow for a better bleed and less pressure build up allowing for more boost. If the actuator arm adjustment does not bring your boost back up, enlarge the hole by 0.1mm increments until the boost = 1.0 - 1.1 BAR mate, that adjustment is correct for your system. I stand to be corrected !!!!!!!!!!!!!!!!!!! Cheers Iain Thanks for clearing that up and making it understandable m8 I will let you know what happens when I adjust the actuator arm.
the_1 Posted February 3, 2009 Posted February 3, 2009 ahhh didn't know it was a 3 port so in that case ditch the restrictor and fit an adjustable valve in it's place it's a lot more fine tunable
zebedee Posted February 3, 2009 Author Posted February 3, 2009 the_1 said: ahhh didn't know it was a 3 port so in that case ditch the restrictor and fit an adjustable valve in it's place it's a lot more fine tunable I did have an adjustable one fitted m8, but it was totally disconnected from the standard boost controller, I really wanted to run it through the factory setup, hence the reason for trying to get the restrictor and the actuator set up correctly.
the_1 Posted February 4, 2009 Posted February 4, 2009 the actuator shouldn't need to be adjusted if you keeping things standard you only need to play with it if your tuning the car. on all the 3 port ones i've owned i always fit a valve in place of the restrictor it's amazing how much more you can eek out of it.
Big 'D' Posted February 4, 2009 Posted February 4, 2009 the_1 said: the actuator shouldn't need to be adjusted if you keeping things standard you only need to play with it if your tuning the car.on all the 3 port ones i've owned i always fit a valve in place of the restrictor it's amazing how much more you can eek out of it. The only reason he is adjusting the actuator is because he let it out a bit due to the overboost prior to coming to see me the other day, I agree that fitting a valve in place of the restrictor would offer easier adjustment, the only thing to be aware of then is that the valve in this configuration operates in reverse of normal so that + = - and vice versa, to start with you want the valve to be fully closed 'minimal bleed' then slowly open it out until your desired boost is achieved then lock it off. Cheers Iain
zebedee Posted February 5, 2009 Author Posted February 5, 2009 the_1 said: the actuator shouldn't need to be adjusted if you keeping things standard you only need to play with it if your tuning the car.on all the 3 port ones i've owned i always fit a valve in place of the restrictor it's amazing how much more you can eek out of it. Big said: The only reason he is adjusting the actuator is because he let it out a bit due to the overboost prior to coming to see me the other day, I agree that fitting a valve in place of the restrictor would offer easier adjustment, the only thing to be aware of then is that the valve in this configuration operates in reverse of normal so that + = - and vice versa, to start with you want the valve to be fully closed 'minimal bleed' then slowly open it out until your desired boost is achieved then lock it off. Cheers Iain Just a quick update guys, the actuator is now reset and the restrictor has a 1.2mm hole in it, and under full load in 4th gear I am getting boost of approx 1.05 bar (boost gauge reading) with no overboost or hesitation, so I would say job well done and all cleared up, big thanks again Big D for all your help and advice and to others that have given advice Oh! one other thing, the feeling of boost coming on is different to how it used to feel, in the words of Jeremy Clarkson it is "epic"
Big 'D' Posted February 5, 2009 Posted February 5, 2009 (edited) Zebedee said: Just a quick update guys, the actuator is now reset and the restrictor has a 1.2mm hole in it, and under full load in 4th gear I am getting boost of approx 1.05 bar (boost gauge reading) with no overboost or hesitation, so I would say job well done and all cleared up, big thanks again Big D for all your help and advice and to others that have given advice Oh! one other thing, the feeling of boost coming on is different to how it used to feel, in the words of Jeremy Clarkson it is "epic" Great result mate Cheers Iain Edited February 12, 2009 by Big 'D'
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now