Originally Posted by Joseph Davis

No, I'm pretty much like this all of the time. It seems to grow on people after a while and they love me for it. You know, down deep, that you want to love me, too.

:)

Originally Posted by Joseph Davis

Eh, he *did* posts some pics of the cage in his car for me a while back, for which I am greatly appreciative. He's really a good n00b, down deep, and I was legitimately angry from having to tune K-series.

Originally Posted by Joseph Davis

Prepare for law enforcement's ability to dial your throttle down to a valet mode, where it can only open 10% or so... just enough for you to limp to the side of the road and wait for your speeding ticket.

Originally Posted by Joseph Davis

Is your STD syphillis, and has it started to rot out your brain yet? Spin the Grainger valves, duh. :1





;)

Originally Posted by Speed Phreak

Hi all, not many people know me because I'm rarely here. However I was compelled to post up my homebrew staged boost controller. Let face it, we're all here becuase the most of us are cheap/broke speed junkies. I'm always on the look out for a good deal or creatively cheap way of doing things.

My car has traction problems (like most FWD chassis turbo cars do)... 6~7psi most of the time will burn down 1st and 2nd gears without careful roll on throttle application, any higher boost than that makes my first 2 gears useless period. This is on a decent suspension, a Quaife LSD, and BFG DR's. I've always wanted some way to control boost over speed/gear, but short of buying a AVC-R or doing some in depth electronics work that prolly won't happen.

I figured why not make myself some sort user of selectable MBC(s)? So with a trip to the spare parts bucket I cobbled together a little 3 stage selectable boost controller that runs W/G spring in the first stage and MBC settings on stages 2 and 3. Total cost on the whole rig was about $40....cheap enough I suppose. The majority of that cost for me stemed from the "Grainger" valves that I purchased to use as ball/spring MBC's($9/per). Also I purchased a shift knob with 4 buttons intergrated into it from the local Autozone for $15 on sale...I've seen them for this much online as well. Your own MBC's can be whatever you having laying around/purchased but they have to be ball/spring type. ** Vacuum bleed type will not work with the diagrams I have provided. I can however produce a diagram that will work, but it will be much more complex than the current design.**

The basic principle I designed this setup around was to allow me to run multiple stages of boost without having to fumble for switches or take my hands far from the steering wheel/shifter.

The "Grainger" valves used in my setup fit perfectly on the honda/acura purge control solenoid. They can be purchased at your local Grainger store if you can find someone with a commercial account, they don't sell to the public(part # 5z763). If you are unable to do this McMaster carries the same pressure relief valve, part # 48935K25. They sell online to anyone. Both will need a { 1/4" female pipe --> 1/8" barbed hose } fitting.

The fitting and "Grainger valve" looks like this -->
http://i174.photobucket.com/albums/w...ak/fitting.jpg

The real deal for your visual learners
http://i174.photobucket.com/albums/w...IYBoost003.jpg

Here is a diagram for ease of assembly.
http://i174.photobucket.com/albums/w.../ghettoEBC.gif



The shift knob I spoke of earlier...really made things come together well. It is basically a 4 button wireless transmitter with a brain box the has the 4 outputs. It's a cheap peice but works none the less. You may need to do some relay/electrical tomfoolery depending on your own designs. I'm happy to provide diagrams of my own setup or help if there is interest.

http://i174.photobucket.com/albums/w.../shiftknob.jpg

Everyone enjoy...

Originally Posted by Joseph Davis

I regret ever asking Speed Phreak to post this write up here.

Originally Posted by Joseph Davis

Hrm.

The thread needs editing, and locking so it can't be polluted. Let the people who can understand basic ball-spring boost controller operation benefit while the inept flounder.

If you want a local scene you have to build one.

Originally Posted by xxguyxx

This is AWESOME, but any boost spiking with this set up? i built a similar MBS a while back, it was a dual stage. it spike when you mashed the gas in a high gear. example. 35 mph 3 gear or on interestate trying to pass a car in 5th. i tried misc fitting sizes, bleed hole sizes, pretty much everything. could never get rid of the 2-3 psi spike.

Originally Posted by Dmc1

if it's only two to three psi then it's not spike. Just a small gift :6

Originally Posted by Ogubudiah

so how do you switch the maps to accomodate this, while driving?

Originally Posted by turbo4life

this is boost levels as long as its tuned for up to the max boost u run but ya fine tunning will be need if the low boost area was not tuned like most tuner just tune at WOT full boost.. but your probably confusing this with switching maps for different fuel octane.... witch all i knwo of is on turbo vw..

Originally Posted by leed

That CRX is ------- sweet. Maj. Dick, hahahaha

I used a vacuum solenoid activated via a levered micro switch on the throttle body before. Floored was low boost, mashed into the carpet was high boost. In reality, it didnt work because Id get too excited and mash it into the carpet no matter what :1
If you're local to a pull-a-part style yard, grab the giant firewall mounted black box off a mid 80's carbed honda. The ones with ten miles of vacuum lines. There will be about 8 of those valves in there + all kinds of useful vacuum fittings and such.

Originally Posted by Joseph Davis

Prepare for law enforcement's ability to dial your throttle down to a valet mode, where it can only open 10% or so... just enough for you to limp to the side of the road and wait for your speeding ticket.

Originally Posted by Speed Phreak