How to install MBC on '88 TII?
#1
Full Member
Thread Starter
Join Date: Apr 2001
Location: 973 Area, Nj USA
Posts: 107
Likes: 0
Received 0 Likes
on
0 Posts
How to install MBC on '88 TII?
I know this is probably somewhere else in the forum but I have no more time to search so can anyone please tell me or direct me to a link on how to install a manual boost controller into an '88 TII specifically? And oh yeah, I just love instructions that come with pics.. Thanks!
#2
Banned. I got OWNED!!!
FInd the vacuum line that feeds the wastegate and splice the valve into that line. ALl the valve does is limit the amount of boost that reaches the wastegate actuator, in turn making it open later, thus raising the boost. Study the 4B section of the 88 fsm
http://www.iluvmyrx7.com/Technical_I...ice_manual.htm
and find the wastegate actuator vacuum supply line, cut into it, adn attatch your valve, start with it allt eh way open(stock) and slowly close it and make test runs untilt he boost goes up to what you want. Youll notice a bigger difference in higher gears.
http://www.iluvmyrx7.com/Technical_I...ice_manual.htm
and find the wastegate actuator vacuum supply line, cut into it, adn attatch your valve, start with it allt eh way open(stock) and slowly close it and make test runs untilt he boost goes up to what you want. Youll notice a bigger difference in higher gears.
#5
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Here are two effective manual boost controllers:
Manual boost controller
Better manual boost controller (part 1)
Better manual boost controller (part 2)
Manual boost controller
Better manual boost controller (part 1)
Better manual boost controller (part 2)
#6
SOLD THE RX-7!
Join Date: Mar 2001
Location: Vancouver, BC, Canada
Posts: 7,451
Likes: 0
Received 0 Likes
on
0 Posts
a ball and spring one is better though...
just do some net serching...
http://members.aol.com/johnmonnin/18boostcompare1.html
just do some net serching...
http://members.aol.com/johnmonnin/18boostcompare1.html
#7
Full Member
Thread Starter
Join Date: Apr 2001
Location: 973 Area, Nj USA
Posts: 107
Likes: 0
Received 0 Likes
on
0 Posts
Thanks guyz.. I'm gonna try to see if I can locate all the parts involve inside my car such as the vacuum line, wastegate actuator, etc.. when I get the chance later on this week.. After that, I'll go ahead and order myself either the MBC or the electronic one.. One more thing, what's the easiest way to get to those parts?? I have that pesky ABS blocking everything...
Thanks!
Thanks!
Trending Topics
#9
Senior Member
Join Date: Dec 2001
Location: WEST
Posts: 354
Likes: 0
Received 0 Likes
on
0 Posts
Dude, installing a manual boost controller is EASY. When you take off the stock air box ( you should throw that away) you'll see the actuator and a vcauum line going to the turbo. Get a adjustable air valve (ball type preferrably) and install each end to it. Blow through one end and close the valve when there is some resistance.
You'll need to close it little at a time as it is very sensitive. Boost in the higer gears and adjust it accordingly (not over 10 psi). You will have boost creep if you haven't ported your wastegate so keep it on the low side ( 10 psi).
You'll need to close it little at a time as it is very sensitive. Boost in the higer gears and adjust it accordingly (not over 10 psi). You will have boost creep if you haven't ported your wastegate so keep it on the low side ( 10 psi).
#10
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally posted by IWNTA20B
Get a adjustable air valve (ball type preferrably) and install each end to it. Blow through one end and close the valve when there is some resistance. You'll need to close it little at a time as it is very sensitive. Boost in the higher gears and adjust it accordingly (not over 10 psi).
Get a adjustable air valve (ball type preferrably) and install each end to it. Blow through one end and close the valve when there is some resistance. You'll need to close it little at a time as it is very sensitive. Boost in the higher gears and adjust it accordingly (not over 10 psi).
#11
Senior Member
Join Date: Dec 2001
Location: WEST
Posts: 354
Likes: 0
Received 0 Likes
on
0 Posts
It works fine. I've had it on for 3 years now and have it set at 11 psi. After the wastegate has been ported, it doesn't creep more than 2 psi. I thnk the bleeder type will give you more boost creep than the pressure type.
I had a bleeder installed and couldn't defeat boost creep even with a ported wastegate. You'd want the vacuum line as short as possible. I've seen some that installed it in the cockpit. That will give you lots of lag.
I had a bleeder installed and couldn't defeat boost creep even with a ported wastegate. You'd want the vacuum line as short as possible. I've seen some that installed it in the cockpit. That will give you lots of lag.
#12
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally posted by IWNTA20B
You'd want the vacuum line as short as possible. I've seen some that installed it in the cockpit. That will give you lots of lag.
You'd want the vacuum line as short as possible. I've seen some that installed it in the cockpit. That will give you lots of lag.
#13
Lives on the Forum
It's fun up until you hit boost creep and blow the motor.  The MBC can't compensate for ambient air temps nor any other change in climate variables.  It changes boost levels when ambient temps change!  There is nothing that can come close to what a properly designed closed-loop EBC can do - boost ramps are the most aggressive you can run - no MBC can even match it's consistency.  This is something that can bite you in the *** - yes, it's fun, but I recommend to save your money and buy a REAL boost controller.
Speed takes money.  Performance takes money.
-Ted
Speed takes money.  Performance takes money.
-Ted
#14
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Performance takes intelligent money. Not everyone can afford to blow money on over-priced EBC's, and anything that can give 90% of the performance for <10% of the cost I'll look at seriously. Boost creep cannot be controlled any better with an EBC, no controller can lower boost. Some of the EBC's will warn you of overboost, but you could easily build an overboost warning light/buzzer for about $10. I've seen dozens of these things working quite successfully, any problems are usually caused by the idiot twidling the *****. I think EBC's are great (but too expensive) and if money was no object I'd have one. But for now I'll stick with what works fine and I can afford.
#15
Full Member
Thread Starter
Join Date: Apr 2001
Location: 973 Area, Nj USA
Posts: 107
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Felix Wankel
The ABS isn't anywhere near the wastegate line. Its on front of the turbo. Take your airbox and turbo inlet duct off and you will see it clear as day.
The ABS isn't anywhere near the wastegate line. Its on front of the turbo. Take your airbox and turbo inlet duct off and you will see it clear as day.
By the way, is this gonna be the same line to be used if I was to install an EBC instead 'coz I was thinking of just buying the Blitz single solenoid from SummitRacing.. What do you guyz think? thanks!
#16
Lives on the Forum
Originally posted by NZConvertible
Not everyone can afford to blow money on over-priced EBC's, and anything that can give 90% of the performance for <10% of the cost I'll look at seriously.
Not everyone can afford to blow money on over-priced EBC's, and anything that can give 90% of the performance for <10% of the cost I'll look at seriously.
Boost creep cannot be controlled any better with an EBC, no controller can lower boost.
This is about being able to afford the performance.  Trying to go cheap can bite you in the ***.  If you feel your MBC is working fine, then good for you.  You're missing out on the consistent performance of a good EBC just because you think it's overpriced...
-Ted
#17
I'm a boost creep...
Join Date: Jan 2002
Location: Auckland, New Zealand
Posts: 15,608
Likes: 0
Received 8 Likes
on
8 Posts
Originally posted by RETed
I'm talking about overboost due to very cold ambient temps. The MBC cannot compensate for that. An EBC with closed-loop feedback can, no problem...
I'm talking about overboost due to very cold ambient temps. The MBC cannot compensate for that. An EBC with closed-loop feedback can, no problem...
This is about being able to afford the performance. Trying to go cheap can bite you in the ***. If you feel your MBC is working fine, then good for you. You're missing out on the consistent performance of a good EBC just because you think it's overpriced...
#18
Lives on the Forum
Originally posted by NZConvertible
Being silly and not knowing the limitations of you equipment can bite you in the ***. I just consider myself clued up enough not to exceed those limits. And I'm not missing out just because I think it's overpriced, I'm missing out coz I can't afford it!
Being silly and not knowing the limitations of you equipment can bite you in the ***. I just consider myself clued up enough not to exceed those limits. And I'm not missing out just because I think it's overpriced, I'm missing out coz I can't afford it!
I've owned my A'PEXI Super AVC-R (Gen I) for several years now.  I've loved every minute it's been running in the car.  I used to run to the ragged edge at 1.00kg/cm^2 (14.2psi) with no problem.  I tried to tune it once up to 1.2kg/cm^2 (17psi) which ended up blowing the oil seals on the turbo in 2 weeks. Boy, was the boost fun when it was working! 17psi from 14psi felt like the same jump from 12psi to 14psi!
My philosophy is, if you're going to chase performance, do it right the first time.  If something costs money, save it then buy it.  Cutting corners will normally get you into trouble - I've been there, done that.  I realize not everyone can afford to do things to their ride - this just ends up being frustration.
-Ted
#21
It is true with the manual boost controller, it is inconsistant. I had my first TVVC 7yrs ago. It worked great! I had installed the **** where the lighter is next to the ash tray...looked tight!!! Stick that Greddy stick under it and it looks JDM!
Thread
Thread Starter
Forum
Replies
Last Post
rotor_veux
2nd Generation Specific (1986-1992)
7
08-31-15 07:49 PM
KAL797
Test Area 51
0
08-11-15 03:47 PM