What I have been saying from the get-go.

 

Well, opinions are great and bench racing is full of them....

If the bernoulli effect is BS, why does nasa use it to design the shape of rocket thrusters? Why don't they just make them all straight?

 

I didn't say the bernoulli affect is crap (carburetors wouldn't work without it), I said 'increasing flow due to the Bernoulli affect is crap'.

having a venturi does not increase the volume of air. it increases the velocity. Now if you were to increase the diameter over a longer length, then yes you have decreased restriction. but over the few inches of length that a TB is, the actual increase in diameter isnt doing much to reduce restriction.

that being said, I think a throttle body is still a good mod for him. hell, I suggested it to him. taking out half of the bar will give you some top end, and the fastman is obviously smoother, which will help cut down restriction also.

btw, the rockets on a space shuttle are BIGGER on the open side, so if what you are saying is true they would RESTRICT flow, not help it.

 

I agree with you. But I've gotta comment on the rocket.... My TB is bigger on both ends...

 

You sure about that? The fastman site says he bores them all the way through for a true bore, not one that tapers in the middle by the blade.

 

so why did you bring up the rocket

I could have sworn someone on here that got the fastman wrote a review and said it was tapered. If i'm wrong and it is all the way through, I think it's a no brainer for your truck.

going to a 85mm TB over a 80mm (stock is 80 right?) gives you a 13% bump in flow right off the bat,
+ whatever you get from removing one side of the bar,
+ whatever you get from reducing restriction along the outer wall because its smoother.
having dumped a grand or so on your exhaust, a 15% increase in flow on the intake side for $300, IMO, is well worth your money.

 

So I just got an email back from them.

So from his email:

1) The kinfe edge does not work with everyones TB and can throw codes for one reason or another. Does anyone know how much it increases the sensativity of the throttle over one that does not have the knife edge?

2) From the sounds of it, I have to either send him my core (which unfortunately I cannot have my truck down for that long) or I have to get one from the dealer for $100 and send it to him. Are TB's really only $100 from the dealer? Also doesn't sound like there is a core charge either since he cant do one without me sending him one.

 

Maybe for the 4.7 stuff.

I don't get the question. Is there something in the bernoulli principle that only applies to the vacumn side?

 

If the blade area doesn't change, you will increase velocity, not cfm. Same amout of air, just moving faster.

 

i tried reading this and all i remember is nasa made the rockets go faster...

did we come to an agreement on anything? lol