Originally posted by Sesshoumaru
well yes.

that's what i meant by psi, tb, and temp have to be the same

12psi is 12psi just like an 6 inches is 6 inches.

i'm not debating that.

the reason 12psi isn't always the same power is b/c the temp in the pv=nrt. His sentence referse to PSI only. He says nothing about volume or temp. Since the temps are usually larger for a smaller turbo and have the same psi the volume would have to be decreased

basically you have a ration since nr are constants.

p=nrt/v

Originally posted by Sesshoumaru
That's correct you wouldnt' be running the same amount of air even though u have the same psi.

well if you tell me your running 10 psi i'm like ok...that doesn't tell me anythign about the CFM's.

but if you telling me ur running 10psi on a t88 i'm like......wow. That's a lot of air.

b/c 10psi on a T88 is more than those hitachi's are capable of putting out at the same psi.

just look at it like that.

Originally posted by Felix Wankel
volume and pressure are two different things.

use the water hoses as an example. run 40 psi of water pressure through a 1/2" hose and then run 40 psi of pressure through a 1" hose.

the big hose flows more water. the big turbo flows more air. more air= more fuel= more power.

Originally posted by paw140
No mention of temperature here... you only talk about the single being like a bigger 'hose', as per your analogy, which is not the reason a single is capable of making more power than the stockers at the same pressure.

That's correct you wouldnt' be running the same amount of air even though u have the same psi.

but if you telling me ur running 10psi on a t88 i'm like......wow. That's a lot of air.

b/c 10psi on a T88 is more than those hitachi's are capable of putting out at the same psi.

Originally posted by Sesshoumaru
that was refering to the n (o2) and this is b/c of t (heat)

this is just assumed due to lesser heat from the T88 thus larger n (molecules/space) or more moles.

b/c of heat and was refering to power due to the larger n.

no i didn't say temp but i guess i took that for granted.

where did i contradict myself?

this is just assumed due to lesser heat from the T88 thus larger n (molecules/space) or more moles.

Originally posted by RotorMotor
but you cant tune out detonation. detonation occurs when your fuel mixture gets to a pressure that it can not withstand. thats why we have to run premium in our cars.... because it will detonate when the pressure increases (under boost). otherwise mazda would have just "tuned" the car to run at 10psi on 87 octane!!

as far as octanes are concerned, do other states have higher octanes for "premium" cause in CA the highest ive seen is 91. if so why is that?

Originally posted by Sesshoumaru
if it was it prolly wasn't explained very throughly.

i don't remembering anything about flash points.

i think there are some nice threads on the 2nd gen section not sure on the 3rd or not. prolly.

basically the higher the rating the higher the flash point and harder the fuel is to ignite. This resiliance to unwanted combustion due to heat (higher flash point) is what makes it good for high boost applications where heat is present.

you can actually lose hp by using higher octane. The NA guys never run premium b/c of that.

I beleive this is due to the complete combustion of the fuel due to the lower flash point.

Originally posted by Sesshoumaru
it did.

it had to do with volume and pressure. the idea was that just b/c you have a larger psi doesn't mean there is more water flowing.

Well why don't u actually benift the forum and explain it clearly so we dont ASSume anthing. Since you ASSume choice 1 and i have no idea what i'm talking about.
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Originally posted by RX7UP
Just so you know. KDRotary in PA has an "antidetonation" product for sale look them up and ask to speak to Skip. Tell Skip, Dwayne sent you. With this product you can use any octane with your turbo car, even 87 octane!!!
Here in New York we had 94 octane until October 2003. They took it off the market because of some enviromental issue, (I think). Now all we have is just 93 octane as the highest...

12 psi in the manifold is 12 psi in the manifold, no matter what turbo is pumping it there.

The single makes more power for two reasons:

- The 12 psi in the manifold from the single is cooler than the 12 psi from the stock turbos.

- The 12 psi in the manifold from the single is fighting less pressure in the exhaust system to enter to the combustion chamber, so you flow more with the freer-flowing exhaust afforded by the larger turbo (and less convoluted exhaust manifold).

Backpressure and air temps are responsible for all of the power you add to a turbo car if you do it without raising the boost or changing the ports. Freer-flowing exhaust means less back pressure and more power, even at the same boost. A freer-flowing intake means the turbo has to compress the air less, which yields lower intake temps and less backpressure (if the turbo only has to increase intake pressure by 14 psi rather than 14.5 psi, it will be less of a restriction on the exhaust side). A cool-air intake means more power at the same boost pressure because the intake temps will be lower (even after passing through a big IC) and the turbo has to compress it less to get the same manifold pressure and temp. An IC with lower pressure drop means the turbo has to make less boost, which means less backpressure. IC efficiency also plays a role in intake temps, but if the IC has lower pressure drop, the air entering the IC will be cooler than it will if the IC has a high pressure drop. It all comes down to intake temps and backpressure, given a fixed level of boost and port configuration.

-Max

Originally posted by Felix Wankel
volume and pressure are two different things.

use the water hoses as an example. run 40 psi of water pressure through a 1/2" hose and then run 40 psi of pressure through a 1" hose.

the big hose flows more water. the big turbo flows more air. more air= more fuel= more power.