turbo ecu?

ok, I know the topic of turbo mx3's is completely dead, but I have a question about the electronics of a turbo.
I know that the exhaust of the car spins the turbine which sucks air in and forces it into the piston. But what controls the amount of psi that the turbo puts out? and what exactly changes when the psi is increased...is it just the speed of the turbine?
Basically, I'm building my own turbo system, but I don't know how to hook up the electronics. I know how all the piping and powering works, but when it comes to the ecu and electronic stuff, I know nothing!

there's a lot more to know about turbo my friend..the psi is controlled by the wastegate..it can be integral (with the turbo) or external...either one has a set psi spring in it...when the max pressure hits it it opens and let the excess air out...you can also control the boost by a boost controller..it tricks the wastgate into seeing a lower pressure than it really is so it can open at a higher psi..

when the psi increases so does the fuel and temp....so you need a fuel management unit (fmu) or a stand alone fuel managaement system...for big boost got stand alone...10psi - gor for fmu...you could still go with the stand alone if yo ugot low boost but isn't worth it in my opinion..it's hella expensive...stand alone replaces the stock ecu but the fmu operates with it...

first we need a little more info on what your set-up is going to be and how much boost you want to run and we can tell you what you would need...I just can't trough numbers here

yea. You see Babyblue has been researching his turbo setup for a long time now, and he knows his stuff inside and out. I suggest you do A LOT of reading about turbos. The words "Turbo" and "I dont know" put together usually turns out in disaster.

Either go to a tuning show and get them to do the work for you, or read read read.

A good book to start is Maximum Boost by Corky Bell(thanks to babyblue once again) VERY informative book... Ive been reading it for a few months now.

also, check this out.. you may know most of it, but it'll give you a better idea of exactly how it works. http://auto.howstuffworks.com/turbo.htm

I'm hoping to order a t3/t4 turbo, and not the kit. I was going to try to build the rest of the system myself out of parts that I salvage off of other cars. But I wanted to figure out how everything else worked first. So, to answer babyblue's question...I have no clue about anything that I am getting except for the t3/t4 turbo, and maybe a kit that will come with it if it turns out that I can't build everything.

surprise..there's no kit offered for the mx3...you got to build your own...

first we need a little more info on what your set-up is going to be and how much boost you want to run and we can tell you what you would need...I just can't trough numbers here

I just wanted to run between 4 and 12 psi...I really don't want to have to get forged internals. So whatever the stock KL-ZE internals can handle is as high as I want to go. I know I'm gonna have to make other changes like the injectors and fuel pump. But I don't want to get into forged pistons, rods, tit. valve retainers etc...that's just waaaay too much money for me right now. I'll wait till later for that stuff.

All of this is going to be added to a KL-ZE outside the car....I'm not going to put the engine in until I'm done modding it...so my K8 is gonna have to do for a while.

a stock KLZE will not take 12psi too well :/

i will say again... READ READ READ you have a long way to go before you'll be able to design and realize your turbo dream. The stuff you need to be thinking about is more along the lines of Fuel management, cooling, size of piping, and how to throw it all together so it works. Seriously.. Maximum Boost by Corky Bell :smile:

a stock KLZE will not take 12psi too well :/

i will say again... READ READ READ you have a long way to go before you'll be able to design and realize your turbo dream. The stuff you need to be thinking about is more along the lines of Fuel management, cooling, size of piping, and how to throw it all together so it works. Seriously.. Maximum Boost by Corky Bell :smile:

the ze could take 12psi..but would have to be carefully tuned...big EFFICIENT intercooler, h20 injection, enough fuel for 12psi (new fuel rails and injectors...

you have to lower the combustion chamber temperature and the best way to fo this is by using h20 injection..it's a nozzle the spary a mist of water into the charge pipe a when it enters the combustion chamber it absorb heat..
a good intercooler will lower the temperature of the air entering the combustion chamber too....
high octane gas will prevent pre ignition (pinging)

by the way there's a HUGE difference between 4 and 12psi...

i second mx3man got get that book by Corky..I got it and is worth every penny

i dont know about the stock ZE taking 12psi... Im not saying you're wrong, but man that would kill any long-term plans for that motor :S seems to me 12 psi isnt far from twice the normal air flow into the piston chamber. Atmospheric pressure is 14.69psi, and your adding in 12psi more.

Twice the air needs twice the gas, and gives twice the exhaust. 12psi would definately need tons of tuning, but I think the internals would need beefing too. Pre-ignition or detonation would be disasterous when running high enough numbers like 12 psi on an engine that already has a high compression ratio.

i dunno just my :2cents: but 4-6 or 7psi shouldnt do too much harm.