View Full Version : Electronic boost controllers
I'm looking for a boost controller, manual controllers are cheap, but are the electronic version much better?
wrinx
Evodelta's post:
http://forum.berlinasportivo.org/showpost.php?p=8280&postcount=41
Damn....best go join the boys at Maccy D's then...
wrinx
Damn....best go join the boys at Maccy D's then...
wrinx
lol, I am going off the the SE Coupe meet now to pick up a tyre, I know a few of them run the Greddy Profeb B II so will ask what they think..
Thanks....and an update on your BC ;)
wrinx
I asked a fella who is running one but really all I got out of him is that the delivery of the boost is controllable so it can come in gradually. I think this is relevant on a FWD where wheel spin and torque steer might be an issue but on ours, all the power early as possible would be best so a MBC is best IMO.
I still have boost leaks - its flying up to 1 bar and falling to about 0.7 now - each time I raise the boost it doesnt fall as far - it was falling to 0.5 when it was set to a 0.8 peak, now its up to a 1.0 peak, it falls to 0.7..........a bad boost controller?
Thanks, if that's the case I want a MBC which can be run to the cabin....will there be any problems caused by running the vacuum hoses in to the cabin???
wrinx
Not sure TBH, the air in the line between the turbo and wastgate has to compress over a much longer line now, but I have no idea if that will make a difference or not....maybe a question for a turbo specialist or EvoDelta....
I still have boost leaks - its flying up to 1 bar and falling to about 0.7 now - each time I raise the boost it doesnt fall as far - it was falling to 0.5 when it was set to a 0.8 peak, now its up to a 1.0 peak, it falls to 0.7..........a bad boost controller?
Dunno...do you get the same behaviour without the BC and Pierburg?
Having never used a BC...is it perhaps typical behaviour???
wrinx
Need to reconnect the pierburg valve and test really. AFAIK the MBC is there to hold constant boost - no movement at all when on full throttle...
jimnielsen
28-07-08, 01:38
The Q4 already has an electronic boost controller. Its VERY easy and inexpensive to gain almost total control over the boost characteristics of the engine. You just need to by a ROM emulator (moates.net) and use the free software (Tunerpro RT).
Sounds interesting, will have a look later ;)
wrinx
Taking advantage of the pierburg valve....interesting...
Got the software...have I got this right, software to change parameters and then the programming is held in the emulator???
You may have to explain this :lol:
Ostrich 2.0 looks like the favourite....?
wrinx
What chip do you have Steve?
Squadra...
wrinx
I think that puts a spanner in the works with regards to changing boost maps...need jim to confirm my limited info though..:rolleyes:
arjunior45
28-07-08, 19:51
all the info you need is there :http://www.berlinasportivo.com/Technical/ECU/hexmaps.php
but you need to check fueling with O2 sensor to avoid underfueling and keep in mind that with the oem MAP you can rise boost up to 1,2 bar {as they say}at middle range.
Nick
Someone's left a load of web code on that link...needs sorting so I can read the info :rolleyes:
Looks like I'm back to a MBC then....still want it in the cabin though :smile:
...any problem with using longer pipes to the cabin? Does it slow the system in any way?
wrinx
...any problem with using longer pipes to the cabin? Does it slow the system in any way?
wrinx
Anyone? :redface:
wrinx
jimnielsen
31-07-08, 01:01
wrinx - I read on the net (though I cant find the reference) - of a WRX enthusiast who tried an experiment using 100 meters of thin tube (on a roll) to connect his boost gauge and manual controller. It made no measurable difference to turbo spool up time.
.. you can't use a proprietary chip like the squadra if you want to set the boost etc up yourself - you can just buy an off the shelf generic 27c256 EPROM that fits the ECU and copy the code direct into it - however (and even simpler...) I am simply using the Ostrich 2.0 plugged into the ECU - rather than a separate 27c256 - and its very quick and easy to make changes to the code.
jimn.
Mmm, you keep changing my mind! :doh:
Tell me more....
wrinx
Decided to go the cheaper route and bought a Powertek Boost Controller, looks like a quality item so hopefully all will be well :smile:
http://i54.photobucket.com/albums/g118/wrinx/Q4/PowertekBoostController.jpg
Might look in to this electrical box of tricks in the future :cool:
wrinx
Looks good! :cool:
Now I need you to let me know how you get on.... :D
cuore_sportivo_155
02-08-08, 19:11
squadra chips have a copy protection on them, so it's doubtful you can start from your squadra to make a new chip.... not that you'll need to with a MBC
Looks good! :cool:
Now I need you to let me know how you get on.... :D
:fp:
Will do :smile:
wrinx
MBC arrived today....smaller than I imagined :redface: but looks to be reasonable quality.
Just puzzling over how to make a case and fit it in the cabin. :smoke:
wrinx
What sort of hose are you going to use?
Been considering fitting one inside but due to small people having access I have decided to go for the normal under the bonnet solution.
Will be ordering parts over the next few days and will have a play.
What sort of hose are you going to use?
Why do I get the feeling that's a loaded question....?
I've only got enough to do one run atm and have literally just ordered a second length of 4mmx4m long....of standard silicon vacuum hose, is that no good??? :confused::confused::confused:
wrinx
Nuts....just reading about pressure hose, guess the vacuum hose won't cope with the pressure....never gave it a second thought :doh::doh::doh:
wrinx
...and others have talked about vacuum hose....had me going there!!! :smile:
This is what it looks like...bit worried about "spike", lots of websites reckon this is a problem if it's not installed in the engine bay, any comments?
http://i54.photobucket.com/albums/g118/wrinx/Q4/MBC/0-0004Medium.jpg
http://i54.photobucket.com/albums/g118/wrinx/Q4/MBC/0-0005Medium.jpg
http://i54.photobucket.com/albums/g118/wrinx/Q4/MBC/0-0006Medium.jpg
wrinx
Why do I get the feeling that's a loaded question....?
It wasnt intended as one to begin with but I see the issue you may have as the air in the pipes is compressing over a longer distance the wastegate will take longer to open allowing more boost - I am just guessing here. Perhaps this is what a boost "spike" is :confused: :confused:
I think silicon is ok, but the turbo might melt it if its connection directly to it. The standard setup has the hose come off the turbo, then there is a joiner for a second bit of hose, if you do away with the second bit conenct the silicon stuff there it should be fine :) Mine is using fuel hose for its short distance.
The install looks great btw :cool:
It wasnt intended as one to begin with but I see the issue you may have as the air in the pipes is compressing over a longer distance the wastegate will take longer to open allowing more boost - I am just guessing here. Perhaps this is what a boost "spike" is :confused: :confused:
Not a clue to be honest, I think spike is when the boost creeps over the max set by the controller....not sure why it happens, but perhaps the tube length means there's a delay in the effect of the MBC.
The standard setup has the hose come off the turbo, then there is a joiner for a second bit of hose
Yeah, I was planning to join to those as they're braided :smile:
The install looks great btw :cool:
Ta...it's been a lot of hassle so it had better work ok!!! :mad:
wrinx
Silicone hose is the best stuff for the job and you should be ok with it, not enough heat from the inlet side of the turbo to melt it. If you want some cheaper stuff PDQ then visit a B&Q Depot, they have clear PVC tubing for pennies.
A boost spike is when the boost rises so hard that it goes beyond the max figure and then settles back to it, I dunno why people complain, boost spikes are fun! (see aforementioned Autospeed site for better explanation)
Personally I can't see the point in in-car boost control (once it's set what can you do?), but I know you like to see your gadgets on display. :tasty:
:lol: Not so much about having them on display...but I really only want to run the full boost when I'm feeling playful ;)
Otherwise I want to be able to turn it down, to perhaps 1bar so, it's just usable around local streets.
The run I did with the Pierburg disconnected told me the boost rises VERY quickly so less would be smoother around town :smile:
Wish I'd known about B+Q, just spent ?15 on another 4m of the expensive stuff :rolleyes:
wrinx
jimnielsen
07-08-08, 00:10
you will still need to stay below the boost figures that are coded into the boost limit table.
you simply rewrite that section and burn it to eprom and banzai!
Now I've seen if fitted internally looks good. Maybe its an option.
Might wait to see how you get on before installing mine.
you will still need to stay below the boost figures that are coded into the boost limit table.
1.4 was the maximum I intended using with a Squadra....but it's less for a standard car, 1.2 iirc???
wrinx
jimnielsen
07-08-08, 10:46
perhaps.. but as you can't see into the squadra chips tables (for boost limit or anything else) you won't know what the boost limit is set to for any given RPM..
Presume the top line is revs? 0.75bar at 400 revs is amusing :smile:
wrinx
perhaps.. but as you can't see into the squadra chips tables (for boost limit or anything else) you won't know what the boost limit is set to for any given RPM..
Not unless Stephan at Squadra tells us but he is away until Sept..
jimnielsen
07-08-08, 13:14
yes, its funny - the boost limit table gets its 'row and column' data from the overboost table - so I guess that had to put in some values that looked 'linear' even if they are not very useful :)
Looks good! :cool:
Now I need you to let me know how you get on.... :D
Connected up the Q4s boost controller today (was waiting for more hose!) and took it for a spin to set the boost level...and again...and again....and again!!!
Never seen 1.2bar boost on this car and it's amazing :cool: Power comes a little sooner and much more swiftly...not quite brutal but it's damn quick....I reckon the old Pierberg valve must have been on its last legs for quite a while :rolleyes:
Boost needs knocking up to about 1.4 yet, but just 1.0bar is fun! I'm expecting the demise of the turbo very soon and the engine gets very warm, might have to install an over-ride switch for the fan (how did you install yours?).
Overall...VERY impressed, it's become the car it should be.
So Jack, either your MBC is cack, or you have a leak/worn turbo????
wrinx
Oh...forgot to say, it will HOLD 1bar+ boost now instead of trailing off :cool:
Very addictive...
wrinx
Best buy some shares in Shell...... :biggrin:
Yeah....already thought about that :smile:
wrinx
Good stuff. I took the MBC apart today - its so damn simple I cant see how it can fail. Probably a leak or worn turbo - will see but im not rushing to fix it as it will require money!
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