How different is it than a BOV. I am adding a MP and I was told I would need to port it to control boost, why?

 

I think a lot of people would agree when I say this, if you have to ask a question like this you shouldn't be fooling with a FD. Use the search button.

 

You don't want to let him find out the hard way?

 

You need to do some basic research in how turbo chragered automobiles operate, on a basic level.

Wastegates vent excess exhuast past the turbine wheel in order to keep boost at a set pressure. Creating more power creates more flow which will overwhelm the the stock wastegate passage, causeing boost creep-

 

the wastegate is what diverts the exess exhaust gases away from the turbine blades so you dont overboost. people port them so that it can divert as much exhaust as possible, hoping to prevent overboosting from boostcreep and spikes which a midpipe is assosiated with.

 

I totally agree. If you don't know what a wastegate is, leave your poor FD alone. Do some research. Let me guess, still on the stock ecu right? With intake, downpipe, cat-back and no boost control, right?

 

Hey, guys. How about CHILLIN out!!!!!!!!!!!!!! All he did was ask a question that you happen to know the answer too. So stop being so harsh...........

 

Clam down yourself. They are just trying to help him so he doesn't find himself paying out for a new engine soon.

 

What a rabid bunch!

 

mmmm clams

 

Whoops.

 

Dude you have to be careful when asking newbie questions around here...It can get ugly!
Well, At least you're asking the questions...

I recommend that you 'print' out as much of the information on the websites listed on the Newbie Thread:

https://www.rx7club.com/forum/showth...threadid=68640

It will provide you with hours of bed time reading...
BTW, I'm not trying to be a dick. It's what I did a year ago.

John

 

radkins probably thinks we're a bunch of dicks. Of course, that's what I thought when I first became a member.


Anyways, it's just like Dyre and CYM TKT said. When you open up your exhaust, you turbo system will be dealing with more exhaust. Part of your turbo system is something called the wastegate. The wastegate diverts exhaust away from your turbines so that they don't deliver as much pressure to your intake. However, if your wastegate is too small, then your turbines will be spinning faster and faster as your revs increase, even when the wastegate is completely open. This is referred to as "boost creep". If you boost creeps too high, then you will pop your engine. Porting (enlargening) your wastegate will prevent this, because it will be able to handle the extra exhaust that comes with exhaust upgrades. Another option you have is a "restrictor plate". A restrictor plate is a plate with a hole in it, that you put between either your downpipe and midpipe or your midpipe and catback. The hole in the plate is smaller than the diameter of your exhaust, so that it restricts the flow of exhaust so that the wastegate isn't overloaded. This should just be a temporary mod, while you are waiting to port your wastegate.

A BOV (Blow Off Valve) is different then a wastegate, because a BOV vents the compressed intake air. You might be thinking, "Why can't I just set the BOV to vent the air that the wastegate can't handle?" This is for a couple of reasons. The first is because a BOV is like an on/off switch. You can't set them to vent just one or two psi of air pressure. It's all or nothing. Second, you will be wasting work that is done by the turbos. The more work the turbos do, the more your wear them out, especially when they are delivering high amounts of boost. You don't want your turbos to work anymore than they need to, so that they last and deliver their peak performance for as long as possible.

 

The Dude asked a simple question is up with "you shouldn't be foolin with your FD" answer...I have been on this forum now for almost a year and I still think answers like that are not called for...if you don't have anything constructive to say just shut up and leave the thread alone...Hesus Christ, man! it's his car, he wants to mod it and he's trying to learn...help a brother out! sheit...

 

Agreed. At least he is asking about THIS rather than telling us about the engine he blew because he never asked about porting his WG!

Relax Francis.

 

You don't go running around modding something you don't know the first thing about. If you even had a clue how a turbocharger system works you would never have to ask what a wastegate even is...
If you don't understand the basics of a system and its components, why the **** are you changing it?

The problems with society today, ignorance, and laziness...

 

The guy has to learn somehow....Thanks for helping the man out Jonski. but for future reference man, try the search button, even though it takes longer, you won't have to deal with any **** ..

my 2 cents -ben

 

Well, what can I say, it's my time of the month.

Honestly, I just get sick of ignorant people doing things to their car when they have no idea of what they are doing. Then they blow up the car and sell it and the reputation of the FD goes down even more.

I'm not saying I've never made a dumb statement or question on the forum but I did a hell of a lot of research before I even posted here. I spent dozens of hours reading the forum and many more going through Rob's and Steve's sites. If people would just do this, then these type of posts wouldn't show up anymore.

 

For all those who critizied this guy for asking a simple question, let me now ask you a question.

When you FIRST got your FD, did anything go wrong with it? Im sure it did, and why is that? You can READ all there is to read but you STILL WILL NOT have the one key element, which is experience. I hate when i talk to people about cars and you can tell they just read all day and have never wrenched a day in their life. Who cares if he blows his damn motor? Are u guys the ones paying for it? Is it gonna ruin another FD? NO! ALmost 80% of FD's out there are on their second or even 3rd motors...i bet 90% of the guys on this forum are on their second at least. So dont criticize this guy for asking a question, not everyone is born with unlimited knowledge

 

Just beause I didnt know what a wastegate was doesnt mean I'm a ******* idiot. I have just spent most of my life messing with bikes, but I sold those to buy the FD.

Yes I do have an upgraded ECU, but I understand I am at the point where just an ECU upgrade isnt going to do it. This is part of my research! I want to learn what I need to do and why I need to do it and have read everything I could find about rotaries. If some of you would rather waste your time slamming on me cause you think you're smarter then go ahead, but you not talking to a dumbass. I suppose you knew everything about your car when you bought it huh. I did a search but didnt find any explanation for my question. You type in "wastegate" in the search function and see how many things come up.

Yes I do (now) think some of you are dicks. As for those who were helpfull I greatly apreciate it.

 

Well some of you guys might have been a little hard on him. I bet there are actually a lot of guys in here that dont understand exactly how a wg works.

I'm all for tough love and everything but if your going to take the time to bash him for not knowing you should at least go ahead and include how a wg works in your thread.

Anyway, the wg has been explained so I'll go ahead and stop preaching

STEPHEN

 

Not trying to be critical here, but the information that already exists (ie. search) are compiled from years of experiences, that is why one ahould read and understand first before asking an ignorant question.
Let's just say we be nice and give him all the milk and cookies, how is this info going to be different than what can be found in a search, how is being NICE and giving him answers that already exists out there going to help with his EXPERIENCE? What does knowing the difference between a WG and a BOV got to do with experience? What is the point of your post?

Yes, the guy is just trying to ask a simple question. But consider this, how would you feel if your mechanic has to asks you what's the difference between the WG and BOV? Would you be NICE and explain it to him or be thinking WTF are you doing with my car if you didn't even know that. Would you let him continue to work on your car after you tell him the answer? All we are saying is this, if you do not have even the most basic understanding of a very complex vehicle then maybe you should let someone who does work on (mod) the car.

 

whats a turbo timer?

 

hahaha


nothing wrong with his question...everybodys gotta learn...me, you, and you and you both.

great answer though jonski

j

 

The point of my post was for you to realize that bashing him for asking a simple question will do him NO GOOD. He needs to learn on his own with actually getting under the car, but EVERYONE needs help along the way. He said he searched and nothing usefull came up...
If i was PAYING someone to work on my car and they asked me what a WG was then i would be pissed because I am giving them my money for their knowledge. I obviously would not let this guy work on MY FD, but he needs to learn somewhere...