Hi All

I bought a GBE EVO - MBV last week.
I have bought it because my 10yr old boost solenoid seems to
malfunctioning alot easier i.e needs cleaning more, even though oil is ok level.
I have a boost Guage and always run the car on Optimax and millers.

Anyway before I do put it on, can anyone answer the following?
1. Are they safe, I just want to run same standard boost.
2. Are they ok to use on a MY93 wrx import?
3. How does the ecu still know what you are boosting when you
bypass the solenoid?

Cheers

WW

 

Hi mate
I'm running one in a my93 WRX with no problems at all.
Providing you've got a boost gauge you could get away with running it a little higher as ive got mine set at about 14 psi.
I presume the ECU knows from the amount of petrol its gulping so it cuts fuel at about 15.5 psi.
It makes a lot of difference once you've found your right boost

 

Hi dave

What kind of benefits have you found?

Also does your boost guage run off one of the hoses that comes
from the throttle manifold using a t piece adaptor?

cheers

WW

 

Well the main thing is the boost being higher is a lot better and there also is less lag.
I had my boost gauge fitted by a garage so ca'nt answer that yet, but will have a butch later

 

Cheers dave

If you can tell me which pipe it is cut into that would be
great help.
also if another guys have ideas.

cheers

WW

 

A manual boost controller can help in several ways.

- Increase boost pressure - more power!

- Allow boost to come on alot fiercer by preventing wastegate creep.

- Better control of boost, particularly if you have a problem with your wastegate solenoid.

- Removal of "2nd gear syndrome" in MY00s.


The ECU knows what boost you are running via the MAP sensor. The wastegate solenoid is used to control the wastegate actuator, but the MBC takes over that function.

You can take the boost gauge feed off the hose after the MBC, by using a T-piece. However, I'm not completely certain of the setup for your MY... If you had a MY00, there would be a spare on the intake manifold you could use.

As yours is a JDM, be careful with the boost. Even with standard boost, there's always a risk of engine problems, if the fuelling and ignition timing isn't adjusted. If you're gonna increase the boost, still on standard maps, that's asking for trouble. I know you're running Optimax and Millers, but that may not be enough. At the very least, a knocklink should become your new best friend. However, your best bet is to get a ScoobyECU...

 

Sorry for butting in, What do you mean by Removal of "2nd gear syndrome" in MY00s?

And do you need to have the car mapped to benefit from having an MBC fitted??

Thanks

 

2nd gear syndrome is something our Pacific based friends incorporated into the ECU, to meet certain noise pollution levels (I think that's why they did it, anyway!). For instance, you pull away from a set of traffic lights in 1st, change to 2nd, but then the idiot in front of you suddenly decides to drive like an 80 year old, and so you wait for your opportunity to overtake (), thus holding it in 2nd gear for a few seconds. You see your chance and floor it, but you only get about half the boost pressure you would normally get. It only does it in 2nd, and only after holding it in 2nd for a few seconds. It doesn't do it if you accelerate gradually in 2nd, or if you change up from 1st, or down from 3rd. The ECU does this via the wastegate solenoid, so when you fit a MBC thus disconnecting the hose from the solenoid, problem solved.

With regards to remapping, you would only need to do this if your AFR indicated too lean a mixture under WOT, or if your knocklink started to indicate det. Normally, the MBC is just a cheap alternative to a remap. When you get used to the power increase (and you do, trust me ) and you realise there's nothing more you can do "on the cheap", the remap is the next step. I think some people then remove the MBC, replace with a 3 port wastegate solenoid, and give the boost control back to the ECU. Incidentally, I believe the remap removes 2nd gear syndrome...

 

I'm running one on my93 at the mo, and it goes fine, much better than a nasty bleed valve, i know the guy who makes them, i'll try and get him too post here so you can ask some Q's if you like...

G.

 

Hi
Thanks for buying this item!
Any questions you have, feel free to ask here or via PM/Email.

Basically, you will have no trouble on your car UNLESS you go silly with the boost.
A lot of Scoob owners are using my controllers now without any ill-effects. As you have probably seen, the Evo controller (maybe I should rename it Prodrive or Sti??) is functionally identical to another famous brand of MBC, but a) cheaper and b) easier to adjust.

Let me know if I can help in any way!

 

Hi Grant,

Nice one mate. Been using the MkII since September, problem-free. Glad to see the Evo (perhaps you should rename it the "WR1"...?) comes with smaller ends and hose - had a nightmare finding hose with a 9mm bore...! Haven't had any spikes, so haven't had to touch the breather hole. Still got lots of turns left to increase boost (if my TD04 was capable )

You ought to do a bit more advertising. The Dawes has been a long and established king, but there are lots of people who believe your version is far more precise. A bit more advertising and who knows? What marque of car do you tend to sell to the most?

 

If I get time this weekend I'll try to fit it.
I got the evo with red tubing so I'll let you know
how it fits.
I'll also see if my boost guage still works with this Piping set up
or if i'll have to re work it.

If it stops working because of the change of pipe work can I "T"
piece it into the tube before the MBV? would this be safe?

WW

 

It's not only '00s that do this, my '97 does too.

 

Really? Didn't realise. It's great isn't it?!