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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


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Old 07-26-2012, 01:38 AM   #1
Croustibat
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Originally Posted by ForeignMuscle View Post
Croustibat, you just tried way to hard on that. An intake will not be worth 2psi. Ever. At the most it will make flow more efficient. 15psi is 15psi above 1 atmospheric pressure. It will not make more boost. Full boost may be realized sooner, flow will be smoother. This isn't a hundred shot of nitrous were talking about. Buy a cheaper unit or build your own. 300 bucks is fucking stupid. Period.
I wrote "worth of". Which does not mean the boost reading will be up 2psi; it means the difference between compressor inlet and outlet will be 2 more psi, which is exactly the same as upping the boost of 2 psi.

But you have to be familiar with turbo tech to understand that.

BTW i also said the shiny intake tube is useless.
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Old 07-26-2012, 07:21 AM   #2
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Originally Posted by Croustibat View Post

But you have to be familiar with turbo tech to understand that.

BTW i also said the shiny intake tube is useless.
I work on jet turbines. So I think I'm qualified for "turbo tech"

Anyhow, to the OP. If it's cheap I would do it. If your on a fairly stock engine you will hardly notice the benefits but they will be there. It will just free up a little more air space. An intake is an intake as long as your talking bolt on. Its not going to break or even vary much from brand to brand. It's just a larger pipe. That is all.
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Old 07-26-2012, 08:44 AM   #3
Croustibat
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Originally Posted by ForeignMuscle View Post
I work on jet turbines. So I think I'm qualified for "turbo tech"


I call in another statement of yours and raise the bullshit flag.



Quote:
Originally Posted by ForeignMuscle View Post
[...] Idk about you but i work full time and go to college full time as well and Im not rich.[...]
Trying to look smart does not work when you act and lie like a brat.

So, if you are ever interested in that, here is a little turbo tech course.

The real name of turbo pressure is "compression ratio" , and it is the difference between turbo inlet and outlet. Look at a turbo flow chart and find out what is written on it. A turbo does not really care, if it has 15psi at the intake and it is supposed to get a 15psi compression ratio, it will output 30psi. If air is at 40psi, it will output air at 55psi.

In a car though, people use turbo pressure as the outlet pressure compared to atmosphere, and that is very different. Because it is the same only if the air filter does not restrict the flow.

The thing is, it can, and it can drop 2-3psi quite easily. Meaning your 20psi "boost pressure" is in fact a 22-23psi compression ratio; and on any T28 turbo, that means going straight out of efficiency zone and in the overspin one.

Now if you can stop that restriction, you get a true 20psi compression ratio, meaning you stay in an efficient zone and get more power.

That is turbine 101, you are supposed to know that before even looking at a turbine.



Edit:
now to add to this:
you are right about the intake not going to do much. However it can cause problem as the tooth shaped OEM tube somewhat buffers the air, and prevent the flow around the turbo and from the dump valve from interfering with the MAF, that does not like working in "not straight" air. Fortunately you can get an air straightener, these basically are honeycomb shaped. Does not cost much and needs to be fitted between the tube and the MAF. And it works.
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