diy electronic 2-stage boost controller
 

okay check out my idea, in all of its ms paint glory-
http://img108.exs.cx/img108/5637/2stagembc4vk.png
i think this would be a very cost-effective 2-stage manual boost controller. once again it's off for high boost, on for low boost.

Re: diy electronic 2-stage boost controller
 

Looks like it may work, you have to be more descriptive of how it will work and what parts are neccesary to make one.

But if you do make one, plase take pictures and do a writeup, dont forget to make a parts list.


Good stuff

Re: diy electronic 2-stage boost controller
 

i've been planning on making one of these and using uberdata's nitrous script to activate the solenoid at a certain speed or rpm (you can choose either one). i won't be boosted again for about a month though, but i'm sure i'll have one made and tested before then ;)

Re: diy electronic 2-stage boost controller
 

That's how I'm making mine. I got son solenoids from a teacher who has a ---- load from his RX-7 collection.

I might make a three stage. He gave me two valves, 1 normally open, 1 normally closed.

I don't know I was thinking 6psi for traction, 8psi for daily driven, or 10psi when someone wants to go,
either that or 8,10,12, or just 6 and 10

Re: diy electronic 2-stage boost controller
 

i'd say do 6 and 10. and please for the love of god make a good writeup outta it. a 2stage boost controller is pimp

Re: diy electronic 2-stage boost controller
 

that's a great idea! and looks simple to make too.

Re: diy electronic 2-stage boost controller
 

I'm not gonna say that this is a bad idea, i'll just tell you that i tried the same thing and it didn't work.
One problem with that design is that on a mbc there is a hole on the wastegate side of the controller, (at least on the one i had) and when you set it up like you have it,

when the solenoid is open then all the air flows through it but instead of pushing on the wastegate it goes out the hole on the side of the boost controller.

I tried it many different ways and couldn't get it to work. I was using a solenoid from a civic/crx though so that might have been the problem. I just kinda gave up on it after many failed attempts.

But if you can get it to work let us know the design and what you used.

Re: diy electronic 2-stage boost controller
 

This is another way i had it setup and still didn't work >:(

With the solenoid closed, the wastegate would see full boost, then with it open, the needle valve would bleed off some boost making the wastegate open later. That was the thinking in it.

Attachment 38536

Re: diy electronic 2-stage boost controller
 

What kind of solenoids do you all use for the 2 stage?

Re: diy electronic 2-stage boost controller
 

already got one ;)

http://www.boostednw.com/video/images/mbc2.jpg

http://www.boostednw.com/video/images/mbc1.jpg

Re: diy electronic 2-stage boost controller
 

nice! got a write up yet???

Re: diy electronic 2-stage boost controller
 

ok.. so what kind of solenoid is that?

Re: diy electronic 2-stage boost controller
 

I got a KIA solenoid from the man himself last week. At least that's what I think it is. I'm not much of an electrical nut though. :-\

Re: diy electronic 2-stage boost controller
 

can someone hook me up with one of those? I dont know where on the kia it is.. and our local pick-n-pull has the crappiest selection youve ever seen

Re: diy electronic 2-stage boost controller
 

i didnt build mine, but the solenoid has a branding on it. ECI.

thats all the more info it gives.

Re: diy electronic 2-stage boost controller
 

Ya, I will do a write up when I have working. Will be a while as my car is still off the road for a few weeks.

Re: diy electronic 2-stage boost controller
 

If you have a MBC that leaks between the MBC and the stock actuator, you'd need another solenoid to block that path. If it was on the pictures above, it'd be between the MBC and the white Tee above it (next to the keyboard's rightside 'Windows' key). It'd have to be closed when the other solenoid is open, and vice versa. With that setup, though, I'd be very careful. If one closed and the other failed to open...who wants to see what 20psi+ can do? :-X

The other option that I just thought of would be to put in a check-valve in place of that 2nd solenoid, but if my understanding of a bleed-off MBC is correct, it'd never release the pressure properly. Maybe this is where a non-bleed-off retail unit would be the best course.