Turbo time!

bobby2002S2K · 11-10-2007, 10:11 AM

Well i have come to the realization that i want more power so, the new greddy turbo system is lookin good since the price drop. One thing i can see it doesnt come with is a blowoff valve. Seeing that i know just about nothing about turbo system besides understanding how they work. I'm looking for some good input on what blow off valve i should get to go with the system. And any other info you want to throw in there. Tips, hints and whatever.

SXY_S2K · 11-10-2007, 01:21 PM

What's the price on that kit now?

bobby2002S2K · 11-10-2007, 02:10 PM

$4100

s2000isu · 11-10-2007, 06:49 PM

take a look at s2ki and see if you still want the kit

Blackdragon · 11-10-2007, 07:13 PM

S2ki makes me cry inside.

Blowoff Valves prevents compressor surges. If your going to get a turbo you should get a blowoff valve. If your getting a Greddy turbo, just get the Greddy Blowoff valve.

The only disadvantage to running a blowoff valve is it can "sometimes" screw with the ECU, causing stalling when the throttle is closed. If you also run with your cat on (which you shouldn't be doing if your running a turbo)when you hit boost spikes it "can possibly"cause damage to the cat.

s2000isu · 11-10-2007, 07:39 PM

"(which you shouldn't be doing if your running a turbo)when you hit boost spikes it "can possibly"cause damage to the cat."

This is false information

Blackdragon · 11-10-2007, 08:01 PM

no thats general information. Using a blowoff valve can possibly cause damage to cats over long periods of time. Your just saying that because your against cat removal.

s2000isu · 11-10-2007, 08:07 PM

im pro cat removal. Im saying that becuase youre wrong.

Blackdragon · 11-10-2007, 08:25 PM

it may not apply to the 2S200 because with a good tune boost spikes aren't common, but its a provable that boost spikes quote can possibly cause damage to cats over long amounts of time. Because ovbiously you know when a turbo spikes and you cut boost, this causes your fuel to run rich. Not all this fuel is burned and can lead to melting the converter or leave heavy carbon deposits.

Please correct my logic and i'll gladly replace it.

bobby2002S2K · 11-10-2007, 09:15 PM

Quote:

Originally Posted by s2000isu

take a look at s2ki and see if you still want the kit

Where on s2ki? Let me know man, all info is good info.

s2000isu · 11-10-2007, 09:45 PM

You are way overthinking this. So does that mean the sti needs new cats all the time or the mazda or the srt 4 and so on? Theyre all internally wastegated they all have cats so I am confused where the problem is?

Theres alot more

http://www.s2ki.com/forums/index.php?showtopic=541899

http://www.s2ki.com/forums/index.php?showtopic=536442

http://www.s2ki.com/forums/index.php?showtopic=539210

Blackdragon · 11-10-2007, 10:11 PM

The problem is you seem to think i'm defending the idea that it occurs often, I'm not. I'm defending my information to prove that its not false.

s2000isu · 11-11-2007, 06:48 AM

What the hell are you talking about?

"it may not apply to the 2S200 because with a good tune boost spikes aren't common"
Ok so internal wastegates dont cause boost creep? If anything if you have a internal wastegate and remove the cat the chances of boost creep rise quickly due to lack of back pressure.

Because ovbiously you know when a turbo spikes and you cut boost, this causes your fuel to run rich
The car is going to run as rich as it needs to when the boost spikes so it doesnt lean out this is correct. This is good. All cars do this its you know safety so the motor doesnt run to lean and detonate.

Lets just imagine the cars stock. When youre full throttle it holds the injectors open for lets say 9 ms depending on rpm and so on when it idles lets say it idles at .5ms so thats with the throttle body closed it needs .5 ms of fuel to run. Does that mean on a stock car everytime you go from full throttle and totally get off the gas its destroying the cat cause some extra fuel may get by?

As far as the bov goes how is it going to screw with the computer? We arent MAF our cars use MAP. So the map sensor reads the pressure behind the tb plate so when its closed what does it have to do with the bov? The bovs only purpose is to prevent compressor surge as you stated but beeing that the map sensor only sees the pressure inside the intake and the bov only opens when the tb is closed how does this hurt anything?

I know the logic I just presented to you is going to be wrong for some reason. I am looking forward to hearing why. I would like you to find any cases of what you state about s2000's and bring them to my attention. I would find some info on people not having these problems but there is no info on it because s2000 owners are not having these problems.

bobby2002S2K · 11-11-2007, 08:01 AM

Quote:

Originally Posted by s2000isu

Theres alot more

http://www.s2ki.com/forums/index.php?showtopic=541899

http://www.s2ki.com/forums/index.php?showtopic=536442

http://www.s2ki.com/forums/index.php?showtopic=539210

Hey man thanks for the links thats some good readin kinda bothers me to see all the problems that people have been havin. Not only with the system but greddy not even sending all and even the incorrect parts. Wow, Maybe i should stick to the main plan and do the SC route.

bobby2002S2K · 11-11-2007, 08:05 AM

In response to the cat. being ran with this system, from what i have read it seems greddys pretune is with the use of a cat on the car. But I'm no means getting in to if it bad for a cat or not.

Tee-Dub · 11-11-2007, 09:37 PM

I was ready to jump on the Greddy turbo wagon, but reading up on S2KI over the past weeks has made me rethink it too. Too bad, I like the way the turbo makes usable power compared to the SC that accentuates the "peaky" character the S2000 already has.