Boost controller help !!!!!!!!!!

[richarde7927]

Hello all

 

I have a gizzmo ms-ibc boost controller and its was fitted in the car when i got it back in feb of this year .

 

The problem i have is it does not seem to do anything , I could not find anywere in the handbook how to adjust the boost setting ,but after some reading this is how it works .

 

You run flat out in 3rd and 4th , pull over , and the controller will display your highest boost , then you increase the duty to increase the boost , but here is the problem a 10% duty im running 1.03 bar and at 90% duty im only running 1.08 bar .

 

Any ideas what the problem is ? the solenoid is running off the compresser housing and going to the actuator of the second turbo is this right ?

 

Rich.

[Mcgoo]

It should be in between the first turbo pressure outlet and the wastegate actuator. See here http://www.mkiv.com/techarticles/avc-r/install/diagram.jpg

and here

http://www.mkiv.com/techarticles/blitz_dsbc/index.html

[richarde7927]

Thank you for the links , the first link is how my car is set up , but in the second link it says you need to remove pipe 1 off the solenoid to runs up to the metel hose and the cap at the ends . mine does not have this the pipe is still connected at both ends so with link is right . Rich.

[Black_Supra]

It should be in between the first turbo pressure outlet and the wastegate actuator. See here http://www.mkiv.com/techarticles/avc-r/install/diagram.jpg

and here

http://www.mkiv.com/techarticles/blitz_dsbc/index.html

 

The second Link, very nice ... is there a Page for Supras like for the Mitsubishi Eclipse the http://www.vfaq.com with more of that instructions ?

[Mcgoo]

Thank you for the links , the first link is how my car is set up , but in the second link it says you need to remove pipe 1 off the solenoid to runs up to the metel hose and the cap at the ends . mine does not have this the pipe is still connected at both ends so with link is right . Rich.

 

I fitted mine as per the second link.

I 'think' they are essentially the same, but the second link gets you to remove the unused hose and blank all ends. I suppose it eliminates the chance of any leaks past the unused vsv.

[Mcgoo]

The second Link, very nice ... is there a Page for Supras like for the Mitsubishi Eclipse the http://www.vfaq.com with more of that instructions ?

 

I think between our tech pages and MKIV.com you'll find most of what you need.

 

See here; http://www.mkivsupra.net/vbb/forumdisplay.php?f=69

 

and here;

http://www.mkiv.com/techarticles/index.html

[richarde7927]

Thanks for all the help and info , but its is piped up the same as the links i have been sent , and the controller in the car works fine you can adjust every thing but it is making no differance to the boost levels of the car , so it can only be the solenoid thats not working . Rich.

[Marty]

Hi Rich,

We found the boost controller very awkward to set up, it does explain in the manual, but its not too easy to follow. You have to make sure it is set on the closed loop setting, that could be your problem. I remember setting it at something like.. 40duty, and 30 gain.

Have a look at these links and see if they help any....

http://www.lancerregister.com/showthread.php?t=231510

 

http://www.mkivsupra.net/vbb/showthread.php?t=203838&highlight=gizmo

[richarde7927]

That first link i found that on the internet myself and set is up as i could not figure out how to set the boost at all with the manual , but as that link says take the car up the road 3rd and 4th gear flat out and then adjust the duty till you have boost you want , as for the open and closed loop , its on the closed loop for sure ,as if its on open it only run's 0.9 bar . the controller is now maxed out at 90% duty and 15% gain and im only making 1.09 bar . you can here the solenoid working clicking on start up so i think that is working. at 10% duty its running 1.03 bar so the controller only moves the boost from 1.03 to 1.09 bar from min to max on the controller surely this cannot be right . This is driving me crazy as there is no reason this should not work as everything is wired and piped up wright and i have check all the pipes for leaks or ill fitting pipes (for the boost controller ) which has made no differance . Rich.

Edited July 10, 2010 by richarde7927 (see edit history)

[Marty]

1 Bar restrictor ring in your exhaust system choking your boost?

Edited July 10, 2010 by Marty (see edit history)

[richarde7927]

I have a look at that i know there is one in there from when i did the clutch . what size is the hole in the middle of the ring for a 1 bar ring . Rich.

[Scott]

It won't be the restrictor ring. The restrictor ring only limits the minimum boost, not the maximum.

[Marty]

That's my theory out the window then.

My limited knowledge of them, not that i've ever used or had experience with them, is that they provide a restriction of the escape of exhaust gasses, therefore stopping any over boost. My thoughts were the boost controller may be struggling to up the boost if the restriction is too great.

Back to the drawing board then Rich

Edited July 10, 2010 by Marty (see edit history)

[Scott]

It's a pretty fair way of thinking though bud, if the exhaust was the limitation of boost then it would be sound.

 

The reason for the restrictor ring is the crappy wastegate in the JSpec turbos. It is really small and can't really cope with the excess gas supplied by the engine in a free flowing system. This means that you add the restrictor ring in place to almost force the gas through the wastegate. This stops the turbos from overspooling. The UK turbos have a bigger wastegate, hence the reason for them not needing a restrictor ring.

[Marty]

It's a pretty fair way of thinking though bud, if the exhaust was the limitation of boost then it would be sound.

 

The reason for the restrictor ring is the crappy wastegate in the JSpec turbos. It is really small and can't really cope with the excess gas supplied by the engine in a free flowing system. This means that you add the restrictor ring in place to almost force the gas through the wastegate. This stops the turbos from overspooling. The UK turbos have a bigger wastegate, hence the reason for them not needing a restrictor ring.

 

Thanks Scott, makes sense all that Guess if i'd thought about it a bit then i wouldn't have suggested the restrictor ring Like you say, i never needed one on my uk spec, so have no experience with them as such.

 

Rich,

Your boost controller.

What is the Spike stop set to? Try setting it to 0 if it isn't already set at that.

Also, make sure the solenoid it connected right, port 2 and 3 if i remember correctly, 2 goes to the actuator, and 3 to the turbo piping / turbo

Edited July 10, 2010 by Marty (see edit history)

[richarde7927]

Thanks Scott, makes sense all that Guess if i'd thought about it a bit then i wouldn't have suggested the restrictor ring Like you say, i never needed one on my uk spec, so have no experience with them as such.

 

Rich,

Your boost controller.

What is the Spike stop set to? Try setting it to 0 if it isn't already set at that.

Also, make sure the solenoid it connected right, port 2 and 3 if i remember correctly, 2 goes to the actuator, and 3 to the turbo piping / turbo

 

 

The spike stop is set to 0 as i have just been out for a look have me excited for a min . you are right over the port orders what you are saying is how it is on the car and how it says it should be in the instruction book . Rich.

[Scott]

Re-reading your initial thread it should be going to the 1st turbo at the front of the engine, not the 2nd turbo (the rear one). Not sure if you are getting the tubbys mixed up or if you have actually connected it across the bay. If the latter then I would say that is the issue.

 

There is an off chance that the solenoid isn't doing its job properly.

 

I can't be much help with settings etc as I use a MBC.

[richarde7927]

Its fitted to the front turbo nearest the rad , so if that is the first turbo how is the controller working the second turbo to get you the 1.09 bar that its doing at the min

 

its fit the same as this link show you .

http://www.mkiv.com/techarticles/avc...ll/diagram.jpg

 

Rich.

[Scott]

Yeah, that is correct. The boost levels are controlled via the wastegate on the 1st turbo, strangely enough.

 

There is a sequential system faq in the technical area that shows a diagram of it all working.

[richarde7927]

Thank you ill have a look at that its always good to learn something . well i think im going to have a look for another boost controller is everything seems to be right and it can only be the soleniod thats at fault . Rich.

[richarde7927]

I have still not had any look with this problem , im thinking of getting a new controller . Rich.

[Marty]

Not really sure what else to suggest with regards to this.

If the boost controller is at fault then take it back, it was bought at the start of the year, so will still be under warranty.

[richarde7927]

Cheers ill have a look through the paper work . Rich