ok..so ive been doing some reading about turbos...and i cant quite figure out the difference in blowoff valves and wastegates,...and what does a turbo timer do? and same with a boost controller?
Thanks

 

Blowoff Valve- releases unused boost pressure in between shifts. Prolongs the life of the turbo, because that extra air is vented instead of slamming in to the turbo trying to stop it and spin it the other way.

Wastegate-diverts exhaust gasses out of an external tube regulating boost.

Turbo Timer-allows the car to run after the keys have been removed so you don't have to sit there while the turbo slows and cools down. Keeps oil from cooking inside the center section of the turbo and clogging the bearings. Most have a safety feature for automatically turning off if the e-brake is not engaged.

Boost controller-does exactly what it says it does. Most wastegates have a spring in them that is only strong enough for a certain range of boost. Ex: my GReddy Type R wastegate spring is good for 14-21psi depending on how much I tighten or loosen the screw on top. I cannot run more or less than the spring will allow me, so in order to do that, I need a boost controller that will add an extra amount of pressure to the wastegate spring allowing me to run 14-40 psi. Some have other features such as gear/rpm dependant control so if you have no traction out of first you can set the boost to start at "5 psi until 4000rpm" and slowly boost up from there so that you can get off the line without spinning too much

 

thanks alot for the info..now it makes since...lol

 

your assessment of the BOV is only partly correct; it does do this between shifts but that is not the only time. The BOV is opened any time the boost pressure begins to drop due to the exhaust gas pressure dropping when the engine revs drop (sounds confusing, couldn't think of a better way to word it) without the BOV the boost pressure already past the turbo housing would spin the turbo backwards, technically resisting the exhaust gas on its way out of the engine and through the manifold trying to send it back to the engine.

your assessment of the wastegate and turbo timer seem okay, however i dont believe you have the boost controller correct. A boost controller can't adjust boost past the maximum allowed by the wastegate, because its exactly how it sounds. I believe the boost controller give you more adjustability within the range allowed by the wastegate. In order to go past the wastegate's window you would need to change your wastegate, as a lot of guys do.

don't hold me to this as i definitely could be wrong, this is just my understanding from what i know. i'm sure GS fonzy will come through this thread eventually with his 2 cents haha

 

I'm surprised it's taken him this long...he must be at dinner

 

That's pretty funny, Just keep it honest, no making ish up about meth injection and its purpose or whatever else you guys were making up on the other thread. I better stop here before I start quoting. Have a nice day

 

This what your trying to say, right

BOV is a vacuum actuated valve designed to release the air in the intake when the throttle is closed.

 

attaboy fonz, haha you captured the essence of my intention, i just had it worded a little long.

 

Yeah, but there are times when you are not even close to being on the right track.
I know how it can be sometimes; thing get twisted and something else gets portray from what you are realy trying to say. However; that's not alway your case. Just my opinion

sorry for the OT

 

OMG!! GS Fonzy, open your mind before you open your mouth on that one!! The product we were referring to you completely missed.

Whatever

 

Your so off, it's funny
I know you were talking about remote turbo set up (STS). You have a 2j, leave those type of set ups for a car that really needs it
You are just trying to be cheap, but at the end you are going to be kicking your self. I don't even think you know what's really needed to run a turbo on your car. But like I said good luck to you and post back when you have installed your remote location turbo

 

You talk some smack but for once you made a statement that was on point. I've been looking into options, and believe me, I've left no stone unturned but at the end of the day there is no cheap route with the 2JZ-GE.

Over the past three + months my buddy at VIPGarage has been nudging me to do the switch so I'm shopping 2JZ-GTE twin turbos for a winter swap.

 

i'm gonna leave the first one alone, Fonzy already handled that enough

as for the boost controller, yes, it can allow you to run more boost than your wastegate spring. in simple terms, as boost rises, the wastegate begins to open slowly until it reaches the spring limit. this slow opening will delay the turbos ability to create boost quickly. you will never be able to run less boost than the WG spring is. however, with a boost controller, you can in effect, delay the boost signal to the WG, thereby increasing getting back the delay in boost response. lets say you want to run 7psi. with a 7psi spring, it slowly begins to open at like 4psi, and then opens more as it approaches 7psi. at 7psi the wg is fully opened, and maintains boost pressure. with a boost controller, you can run a 5psi spring lets say, but set the boost controller for 7psi. the wastegate stays closed until the boost controller gets to 7psi, at which point it allows all 7psi of boost through to the wg. now the wastegate has 7psi of pressure to open a 5psi spring, so it snaps open quickly. there are a few other variables, but thats the basics.

i forget if a boost controller can effectively double the wastegate spring, or if it can add one bar more to it. i think its double, but dont hold me to that. on my car, i run a 1bar (14.5psi)spring, and with the boost controller, that basically allows me to run a max boost of 2bar(29psi). also like silvergs300 said, most wg's have an adjustment screw to tighten them down a bit and make that 1bar spring act like a stiffer spring.

 

teach us oh jesus who is never wrong......i want your divine knowledge! everyone is wrong from time to time EVERYONE! no better way to learn stuff then to share info and get back something thats right than just being quiet and thinking you know everything!

 

no you're right, but i never leave my word to be taken as gospel. if you look at the majority of my posts, i say something to the effect of "dont hold me to this" or "this is just my understanding" or "i could be wrong".

in that particular case, with the BOV, i did get it twisted, and you corrected. however, read the very last paragraph of my post:

"don't hold me to this as i definitely could be wrong, this is just my understanding from what i know. i'm sure GS fonzy will come through this thread eventually with his 2 cents haha"

i acknowledged that it may have been wrong, and even called ahead of time that you'd be in to correct all of us

i dont mean to try and say that every opinion i'll ever have on a topic is correct; the man had asked for advice and i tried to help him out, to the best of my knowledge. At that point, it would then be beneficial to the OP for you to come in, with more wisdom on the subject, and correct me, but give reason why you're correcting me, not just say you're wrong and you have a habit of giving bad information.