Vortech Blower Insight

Erik,

Thanks for the "SUPERCHARGER CALCULATOR FOR DUMMIES" for me! I really liked the numbers when I changed it to 10lbs of boost. I'm planning on having fun with the car as is when I get it back. Maybe later I'll go crazy. :zorro:

 

Jason, I Am Going To Need My Cat's Back.

 

Don't forget...it's not the pressure that makes the difference, it's the volume of air.

low pressure at high volumes is WAAAAAAAAAAY better the high pressure at low volume....

bernoulli's principle.....

 

This is very true. I talked with the vortech guy and was told this head unit will support up to 800 hp with its flow...

 

Schweeeet.... but how much will our pistons handle...Lol! That is our weak spots on these things right?

 

That and the auto tranny....Lulz...


I kid I kid....or do I??

 

Well you know the half shafts will have to be replaced. Just hope they hold up until I can afford them...Lol!

 

The pistons wont take more then 5-6...I was talking to him about this because I am considering a 392 stroker kit and dropping the CR to about 8.3 and boosting upwards of 15 psi or so...For a stock bottom end I wouldnt up the boost any from where they set it...

 

THIS is what I've been saying from the start, thank god someone else said it!!! I've been trying to impart this bit of wisdom on others (Quick, you listening) but to no avail. It's not psi that matters, it's air flow!!!! (thanx Jeff!!)

 

I'm listening but I don't get it.

I thought that, basically, it's the amount of air you move past a certain point over time. That would be flow. Maybe Cubic Feet per Minute.

I think Bernoulli's principle says something about pressure being inversly related to velocity for a constant flow. For example you might pick a certain flow number. You could get that flow number with 1 psi through a 3" hose. You could get the same flow number with a million psi through a pin hole. The air moving through the radiator hose would be moving pretty slowly. The air moving through the pin hole would be moving pretty quickly. You still get the same amount of air through there every minute in both cases.

Sure there are going to be differences in throttle response and stuff like that (higher velocity, lower latency), but we're mainly talking about just breathing here. It's how much you get, not how fast some bit of it is moving that's going to determine hp.

Am I missing something here?

 

I'm not even in the same state in regards to knowledge on this, but QUICK does make a good point!

This is my SHREK terminology, so bear with me.

volume and pressure. You can only shove so much air into the engine. You can change the rate at which it goes into the engine (ex my shinny S/C). It still can only push so much air no matter if it is going fast or slow, "CORRECT"! With the S/C is the engine able to suck twice as much air as it did stock? I don't believe so. I thought it would be getting the air faster thus pressure, but the volume was the same. Forgive me if this is stupidity at it's best. I'm trying to learn about something that is new to me. :dumb:

 

It seems to me that you're all talking about Boyle's Law, a variation of the ideal gas law. http://en.wikipedia.org/wiki/Boyle's_Law

The basic theory (and how it applies here) is that you can run 5 psi of boost in a garden hose or a 4 inch pipe. Its the same pressure in both, but the 4" pipe is going to deliver vastly more air per unit of time.

 

This is like comparing the rest of the "EQ" to Jason! All kidding aside this does make sense. Wider opening more air, which sounds right to me.

If the opening is the same size and you flow air at the normal pace then throw a S/C in the mix. The air will flow much faster, but the same amount will be going through the same sized hole, "RIGHT"!

 

Wrong. You'll be moving more volume per unit of time.

Think of it this way. You motor is a pump. Right now its pumping 370 cubic inches of air at 14.7 lbs (atmospheric pressure - the weight of earth's atmosphere at sea level). With a supercharger, it will be a 370 cubic inch pump with about 20 lbs of air. How much air does it take to make up the 5 pounds of pressure difference? That's where your extra air is coming in.

 

What you say would be true for something that is relatively non-compressible like water. Doesn't work for a gas. Air can be compressed so pressure matters. You have to define volume a little more than just cubic space. Like Adam said, Boyle's law.

Jeff was talking about Bernoulli's principle but maybe left out one of the 3 parameters. Momo and Ryan made the shift to violating Boyle's law.

Although Boyle's law is applicable to some of the considerations we're primarily talking about Bernoulli's principle.
Summary: No need to work on the intake or head ports when you can simply increase the boost.

 

Thanks Adam,

I thought that is kinda what I said without the correct verbage and cubic this and that. Once again pumping 370 cubic inches of air with or with out blower! Unless I bore out the engine to bigger then 370, that is all the air it is going to take, but the deal maker is the blower and how much air it shoves into the engine and at what rate!!!!!!!!!!! I'm learning people and I have tons to learn. Adam if you want just tell me to shut the puck up and study not talk HAHAHAHAHAHAHAHAHA, kind of like what we do to MOMO when he opens his meat locker:zorro: