stock boost solenoid

 

The Evo comes with the following that works to make the 18-19 PSI stock.

- Internal wastegate on the turbo that is sprung around 8 to 10 PSI.

- Boost control solenoid.

- ECU.


Here's how it works.

The Boost solenoid is nothing more than an electronic boost controler. The ECU senses the RPM the car is at along with the throttle position and regulates how the boost solenoid operates. It will hold the wastegate shut above the stock spring setting of 8-10 PSI and let boost build up to around 19 PSI until 5500 RPM's is reached, then it tapers down to around 15-16 PSI and holds that level until redline. When you install a manual or an electronic boost controler, you take the stock boost solenoid out of the equation (the stock piece isn't the best in the world, so it is better to just "bypass" it when modifying. This sets the boost back down to the stock level (8-10 PSI) as regulated by the stock wastegate. Then the boost controler takes over. The lowest you will ever be able to set the pressure is to what the wastegate is sprung to (8-10 PSI). From there, you can essentially set it as high as you (or the car) can handle...Which will be about 20 PSI on the stock fuel map, but you aren't looking at doing that. You are looking at turning it down.

I would recommend an HKS EVC 5. It has 2 "modes" that you can set. You can set your low boost to as low as the factory wastegate, and then a high boost to be higher for when you want to "play". A simple press of a button will change your boost map, and it is all done in cab. It also has a "scramble" mode which is a lot like the factory boost taper, but you probably won't want this to be active.

You'll also need a boost gauge, and I would recommend getting the Defi BF series in red. The gauge looks sweet and matches the Evo's interior gauge cluster perfectly.

Z1 Performance can hook you up with all of these parts, as well as explain in detail how the EVC 5 works to suit your needs.

Hope this helps.

 

thank you thank you thank you thank you

thats exactly what i needed to hear

any idea what hp figures will be at 8 or 10 psi (at the wheels preferably)?

 

At the wheels in stock form, you will be peaking out around 230-240 HP. You can roughly take away about 10 HP for each PSI, so I would say you should be looking at about 200 WHP is you set it somewhere around 12 PSI. I would set it a slight bit higher than the lowest possible setting on the wastegate just so that the EVC 5 is actually doing some regulating instead of just passing the vacuum signal without adding any "correction" value to it.

 

unplug the boost control solenoid hose = 10 psi

 

Evo will kill a mustang any day of the week its way more powerful way more car and way too much for a 16 year old driver you will kill yourself like many others in your situation already have.

Get an OZ rally or Ralliart lancer.

its because of newbie drivers crashing Evo's that the insurance rates are so damn high.

 

If he gets the EVC V he doesn't need a boost gauge

 

It's never a good idea to run any "modified" boost level on a turbo car without a way to monitor it, and I don't consider the device used to "modify" the boost level as a way to monitor it.

If there is a bleedoff on the line, he could be overboosting/underboosting and not even know it until it is too late. It's best to hook a boost gauge in to the intake manifold and keep tabs on everything.

 

I want to tell you a story, forgive me if this goes over the top. Riding a motorcycle, I've seen plenty of death, young and old and it never becomes easy. But this incident still rings in my head every time I think of him.

His name was Kyle. I say was because, yes, he's dead. He was only 20 and it happen January 11th of this year. He was driving a Ford Focus SVT down a dirt road and lost control, was ejected from the car. Lets just say, I've seen some pretty *ucked up corpses, but his look froze in my mind and I'll never forget it. Everyone knows ford focus' are slow, low power ****e boxes, but still fast enough to kill him.

Now, Im 24 years old, and you are, 17, my friend? I call you my friend because I believe anybody who will listen to something I have to say with respect, young or old, I regard as a friend, distant or not.

I want you to realize that, yes, you may have the skill level, you may have the drive and desire and all the wishes in the world to have an Evo, but there are some things that are worth waiting for your life to calm down. Motorcycles, fast cars, children and drinking are all things people who have a rational, level head can experience. Now, age does not dictate wisdom, but, I would surely advise you...please, whatever you do, be safe. The hurt the death of a friend or loved one has drastic effects on everyone you touch. But not nearly the effects most people never see on the outside, your parents, your sisters, brothers, uncles and aunts. Life isn't supposed to end like that. Accidents will happen, but it is up to you, my friend, to make sure you do everything in your power not to.

I can count numerous occassions, I have come out lucky. Hurt, but lucky. Easily could have been killed more times than I can even care to talk about, and it took someone elses misfortune to make me stop drinking and driving, even only one or two. Stop riding wheelies. Stop hanging corners in neighborhoods at 75mph. Just stop. Then think. Then think some more. Then go.

 

By the way, I realize you are 15. I would like nothing more than to see you in an Evo, but I just wish my words caution you to realize that experience is the key to success. I cannot believe Im almost 10 years your senior, and I feel like a kid to guys who are telling me how to drive. Good things come to those who wait, and if you're in a rush, well....

 

I agree with feldguy completely. Your ability to drive on the racetrack has nothing to do with your willingness to obey traffic laws and drive safely on the street. Just turning down the horsepower WILL NOT prevent you from potential pitfalls of owning an evo. Do you have the maturity to NOT race on the street when someone revs on you or challenge you with a ladyfriend in the car? There is so much more to owning this car than handling the power! Since your father is an instructor he should already know these things. I would pity him for buying you an evo at 16.

 

i was 18 when i got my evo and never hasd a speeding ticket nor an accident, some can handle it some cant, live fast die young

 

well i am 16 and i have had my evo for about 4 months. it is my first car. i have driven other high performance cars before, such as a BMW Z4 not even close to my evo but it is a starting place. i learned very quick to respect the cars abillitys and power. I believe one difference for me is that i paid for the car with my own savings so if i wrech it is all on me. so every driver needs to respect the car, and the laws, and they should be okay.
just my 2cents.

 

This proves our point...

As far as wiplash goes I respect that you saved and paid for the car yourself few kids your age are willing to work hard enough to do that. It does make a difference when its your own money time and work you tend to respect things more. My feeling is if your too young to afford it yourself your probably not ready for it. Just do be careful my insurance rates have already gone up twice since I bought my car and I maintain a perfect record so the increases aren't due to me.

 

i hear what ur saying feldguy and i appreciate it, ill try to take it to heart as much as i can

and yes i know ability to drive well on a racetrack doesnt necessarily mean im a safe street driver but another thing yall need to realize is just because we are young drivers, doesnt mean we are unsafe

and yes you can get into trouble in any car, but an evo with 10 lbs of boost is pretty moderate compared to most sports cars - and yes, i know most kids dont get sports cars for their first (or in my case, second) car

i understand what you all are saying, and im sure most of you would love to see me in a little econobox with -10 hp but even tho im young, i like a sporty car just as much as anyone, and notice the whole point of the thread - to bring the power of an evo down for ... SAFETY