hoggy

I'm thinking about making my own boost controller switching device of sorts. Here is what I'm thinking.

Use wastegate spring for daily driving/first gear maybe. And be able to switch to a higher boost setting via an MBC by flipping a switch in the car.

I was thinking that if you T-ed you vac source and split it into two solonoids and one solonoid would lead directly to a t for also into that t would be the other solonoid output after it went through the MBC. Then that T would go to the wastegate.

This sounds like it would work to me. The only thing I can thinkg that might be a problem is transition if switching after first gear. I'm not sure if there would be any problems. I have no boost to test this on yet so I'm hoping you guys can give me some insight.

racerex

I think I read about doing that on Honda-Tech once. Maybe you should try doing a search there.
It sounds like it would work, but sometimes theories don't work as well as they sound.

hoggy

Exactly....thats why I was hoping somebody had tried something like that before.

ZexRex

jeff did some nice ghettofied 2 stage boost controller, its posted on here somewhere, title was something about stepping up the competition at the street races.

i really need a 2 stage i cant get traction in first or second at 12psi, im just gonna sell my txs manual for a txs 2 stage, i know its not hmt style but i dont feel like riggin it.

ZexRex

---- i cant find the post, the board needs a better search

BLACKSI

i was running a homemade 2 stage in the race car. i think leed was also running one in his b16 crx

PureCRXtasy

This might help.

Two-Stage Bleed with Overboost Eliminator

ZexRex

wow thats a good idea, im just gonna rig a solenoid so that basically i can either turn my manual boost controller on or off. i will just put a smaller spring in my wg for first and second and use this used manual boost controller for 3rd and 4th.

w00t hmt savin me 175 on a 2 stage controller.

ZexRex

lol im so excited about this now haha, im gonna even do some ghettorice fabolus thing like have a red led light up on my dash when i switch to high boost.