Questions about the cfms and airflow.

[stockfornow]

I was wondering about couple of things. First of all, I want to know how much stock 2.0l turbo engine puts out air in cfms, and how much it will with 272's, and how much does 14B needs to spool up, and for example a T77? I just want to know more about the airflow, sorry for these questions, but just learning. I was also wondering, what rods, and pistons would be the best setup, for about 370-500 at the wheels, with which turbo. I also heard that you can make the 50 trim turbo spool up as fast as the the 16g, with just leaning the engine a little bit or something like that. I also was wondering of having to retard the exhaust cam timing, and get some power out of it, and a better spool up time. Thanks a lot to everybody. The main thing is I want to learn how the turbo works excatly, and the airflow thing.




P.S. I started working a lot now, and hopefully I can save up some money, and start building an engine, for real, not dreaming, like I just did couple weeks ago.

 

[ilikespeeding]

I was wondering about couple of things. First of all, I want to know how much stock 2.0l turbo engine puts out air in cfms, and how much it will with 272's, and how much does 14B needs to spool up, and for example a T77? I just want to know more about the airflow, sorry for these questions, but just learning. I was also wondering, what rods, and pistons would be the best setup, for about 370-500 at the wheels, with which turbo. I also heard that you can make the 50 trim turbo spool up as fast as the the 16g, with just leaning the engine a little bit or something like that. I also was wondering of having to retard the exhaust cam timing, and get some power out of it, and a better spool up time. Thanks a lot to everybody. The main thing is I want to learn how the turbo works excatly, and the airflow thing.




P.S. I started working a lot now, and hopefully I can save up some money, and start building an engine, for real, not dreaming, like I just did couple weeks ago.

All of these questions of airflow are realitive to RPM, temperature, and density.

I believe stock rods and pistons would handle upto 450 whp. Id have to say that its really a throw up between aftermarket internal companies, because it really depends on what you are looking for. I'd say brand loyalty is 9/10s of the game here.

As for the turbo, it really depends on if you'd like any remaining potential after 600 whp, what spool you're looking for, how much you're willing to pay, and the fuel system you have supplying the beast.

 

[stockfornow]

All of these questions of airflow are realitive to RPM, temperature, and density.

Thanks, but how is the airflow thing wroks, can you expain it to me? I want to build something that will have no lag, and a great potential, but before that, I need to learn how it excatly works.

 

[MyBeatGSX]

www.howstuffworks.com They have a whole section on forced induction and engines.

And there is no such thing as something with no lag. I think it was Corky Bell that said, "If you have no lag, you have no turbo.". Anything that's going to make 500hp on a small 4 cylinder is going to have some serious lag. Spool time should be the last thing on your mind if you're looking for 500hp.

 

[2fast4]

www.howstuffworks.com They have a whole section on forced induction and engines.

And there is no such thing as something with no lag. I think it was Corky Bell that said, "If you have no lag, you have no turbo.". Anything that's going to make 500hp on a small 4 cylinder is going to have some serious lag. Spool time should be the last thing on your mind if you're looking for 500hp.

Not to undermine Corky's statement, in these days, Direct-Injection technology is making lag a thing of the past - it allows higher comp ratio(10.0:1) is pretty common. That's why Mazda and Volks turbo cars respond quick to spooling. Furthurmore, it affords smaller displacement to make lots of power. If mitsu research for this and implement it on next platform...

 

[MyBeatGSX]

Yea that's partly true. But these cars aren't direct injected so its a non issue. Even with higher compression, you still have lag. And higher compression doesn't help lag as much as people would think. But again, those are non issues and a whole nother topic.
VW's have very little lag because the turbos are so small they're almost spooled just idling. And I think most of us here have small displacement engines making rediculous power for their size. You just aren't going to make big power without lag, its just a fact of life and physics.

 

[stockfornow]

Sorry, but I didn't really find the section on induction, but lots of good info. See, the thing is that I have an idea of a turbo kit having little lag with like a 60 trim turbo, which seems to you like whatever, but I need to do some research, and if it will work with one little secret, it will be a no lag turbo that will be able to support 500hp. Well, this is the other story, right now I just need to find that info. As for the idea, if I think it will work I will post the thing in here after I'm done, if not, I'm just going to tell you what was it all about, and how it should have worked, but for now................... research... I guess. Thanks to everybody who's helping finding and explaining the stuff.

 

[leet]

I think before you even consider 500, you should probably set a more reasonable goal of, say, 275-300.

500hp = lag. Varying turbos will offer different amounts but the fact remains. I've read your profile but unless you're going to let us in on your 'secret' you're probably not going to get much assistance.

 

[stockfornow]

Honestly sorry, but I can't let you in on the secret. Well another question is: what's the difference in 15psi from 14B and 15psi from like a 60 trim turbo? How is that can be explained? Thanks. Oh, also before the all the crazy stuff, I will need some kind of setup. Well, as you say, you have a good point of having to set the lower goal. So, is it possible so squeeze 275 out of the 14B? And which AFRP is a good one, and with 272's HKS, and a FMIC, 3" exhaust all the way with open dump would it be possible? Also with these crazy cams would I need to have stronger springs or the new stock ones would be allright? Thanks, again.