506Hp/507TQ on only 9PSI???

cbarr300 said:

of course it is.....boost is just a measure of backpressure. If you have some kickass, high-flowing parts...then you WILL see less boost...but WILL flow more air....which WILL equal more power (even with less boost)

surprised?

haha

take for instance the 4 cyls running around pushing 22 psi. I remember one time when I told a guy how much boost I was running (10psi at the time). He laughed and said, "haha, that's weak, I'm running 23 on my eclipse." I asked him how much power he was making and it was somewhere in the 200 area...I looked at him and said I'm just over 400...with less boost than you. I asked him how that was possible...and he was kinda at a loss for words.

I guess he forgot I had 4 more cylinders than him ....and I can flow more air since I have those extra cylinders. Since I can flow more air..there's less backpressure...and since there's less backpressure...I'm showing less "boost"

now of course, I could do some ungodly combo and run 22 psi on the same engine in the example...but then I'd be wayyyyy above where I am now, lol.

Now, instead of having the 4 cyl vs. 8 cyl example....let's do v8 vs v8. One has some kickass parts and one has some parts that aren't quiet as kickass. Obviously, the kickass combo is gonna make more power....cuz it can flow more air and the other combo won't make quiet as much cuz it can't flow as much air. Now let's say we throw a vortech s-trim on each combo. Could it be that the kickass combo would show less boost...but more power? yup

so basically, I say all that to say....that with the right selection of parts.....

it most certainly is possible.

btw, I realize that there are certain what-if's to my example...such as cam selection. In actuality, the lesser flowing combo could make more power under boost than the good combo.....but that's a whole 'nother story.


sorry if I got some stuff wrong in my rambling...I'm a bit on the tired side haha.....seriously, my eyes are barely opened right now.

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This is the right concept, and in my brief reading, seems to be pretty factually correct. And am I the only person who thought "if this had some emoticons in it, it could've been written by Grady?" LOL

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cbarr300 said:

exactly!

"boost" ranks up there with peak dyno numbers....It's nice to say you run "x" psi.

but there's more to the story than that.

yet another example for any new people on here or whatever:

Let's say you have two straws...one has a larger diameter than the other. Now blow through them...which one makes you run outta breath first?

the large straw obviously. Now let's say you were to hook a vacuum/boost gauge up to your mouth (just work with me ppl haha). Which one caused the most backpressure in your mouth? The small one obviously because you can't flow as much air through it. So now we have that the small straw causes more boost...and the large straw causes less boost, right?


buttt...we all know that the bigger one flowed more air.

sooo, boost numbers aint all they appear to be :wink:

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turbogt said:

bingo!!!! A higher flowing hci combo will actually flow MORE CFM while reading LESS BOOST..

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