to help new people understand how supercharging works.
May 17, 2007 | 01:41 PM
#1
to help new people understand how supercharging works.
i keep getting asked about what kind of numbers can i expect
If I go FORCED INDUCTION.
and when i tell them i get a reply of (is that all !!!!!!!! )
so i am going try to explain how forced induction works
So all new people to this world can understand.
Super charging works on a percentage rate.
Their is no set amount of horse power that any unit will make.
the rates are 30%, 40%, 45%, 50%,
this is the rate for the super charger only, i will get in to
Other stuff later.
now a stock motor rated at the crank will show a much
Higher horse power number then a stock motor rated at the rear wheels.
The 4.8 is rated at 285 hp at the crank.
Dyno it can show 220 hp at the wheels, this number I will work with.
50% of 220 hp is 110 hp.
Add 110 to 220 and you get 330 hp at the rear wheels.
Just what the manufacture rated it's super charger at.
Now if the unit is rated lower then 50% the numbers will be lower.
45% of 220 hp is 100 hp. 220 + 100 = 320 hp
40% of 220 hp is 90 hp. 220 + 90 = 310 hp
now things like better flowing heads not only help NA motors
They increase the power of supercharged motors as well.
Camshafts the same way, to help increase power.
Intercooler, injectors, fuel pumps, headers, high flow cats, and so on.
by increasing the horse power that your motor makes, you increase the HP number
Your supercharger adds.
Now if you built a motor that can lay down 350 hp to the rear wheels.
50% of 350 hp is 175 hp. 350 + 175 = 525 hp
This is the basic way supercharging works.
The lower the horse power numbers you put out, the lower the hp the supercharger adds.
The higher the horse power numbers you put out, the higher the hp the supercharger adds.
if any one has any thing to add, lay it down so people will understand.
requested turbo add in.
a turbo does not have the same parasitic loss
That a belt driven supercharger does.
the percentage rate of increase horse power
Is much higher 65% to 70%.
Also a turbo does not leave the factory at a set psi.
You have the option to set the psi where you want it.
You can increase the percentage rate of any supercharger or turbo.
1. Buy replacing the drive pulley or turning up the boost.
2. Using the right intercooler with your system to lower air temps.
by doing this you not only increase efficiency of your unit,
you also increase the percentage rate of horse power added.
you can acheave 100% or higher with the right combo.
If I go FORCED INDUCTION.
and when i tell them i get a reply of (is that all !!!!!!!! )
so i am going try to explain how forced induction works
So all new people to this world can understand.
Super charging works on a percentage rate.
Their is no set amount of horse power that any unit will make.
the rates are 30%, 40%, 45%, 50%,
this is the rate for the super charger only, i will get in to
Other stuff later.
now a stock motor rated at the crank will show a much
Higher horse power number then a stock motor rated at the rear wheels.
The 4.8 is rated at 285 hp at the crank.
Dyno it can show 220 hp at the wheels, this number I will work with.
50% of 220 hp is 110 hp.
Add 110 to 220 and you get 330 hp at the rear wheels.
Just what the manufacture rated it's super charger at.
Now if the unit is rated lower then 50% the numbers will be lower.
45% of 220 hp is 100 hp. 220 + 100 = 320 hp
40% of 220 hp is 90 hp. 220 + 90 = 310 hp
now things like better flowing heads not only help NA motors
They increase the power of supercharged motors as well.
Camshafts the same way, to help increase power.
Intercooler, injectors, fuel pumps, headers, high flow cats, and so on.
by increasing the horse power that your motor makes, you increase the HP number
Your supercharger adds.
Now if you built a motor that can lay down 350 hp to the rear wheels.
50% of 350 hp is 175 hp. 350 + 175 = 525 hp
This is the basic way supercharging works.
The lower the horse power numbers you put out, the lower the hp the supercharger adds.
The higher the horse power numbers you put out, the higher the hp the supercharger adds.
if any one has any thing to add, lay it down so people will understand.
requested turbo add in.
a turbo does not have the same parasitic loss
That a belt driven supercharger does.
the percentage rate of increase horse power
Is much higher 65% to 70%.
Also a turbo does not leave the factory at a set psi.
You have the option to set the psi where you want it.
You can increase the percentage rate of any supercharger or turbo.
1. Buy replacing the drive pulley or turning up the boost.
2. Using the right intercooler with your system to lower air temps.
by doing this you not only increase efficiency of your unit,
you also increase the percentage rate of horse power added.
you can acheave 100% or higher with the right combo.
Last edited by PappyDan; May 18, 2007 at 01:00 PM.
May 17, 2007 | 09:52 PM
#2
Originally Posted by PappyDan
if any one has any thing to add, lay it down so people will understand.
but JW how's the build goin, and are you going to keep your Powerdyne on the 6.0 setup???
May 18, 2007 | 12:32 AM
#3
yeah i'm going to keep it for the 6.0.
all i want is 500 hp to the wheels,
build the motor right, 8 psi intercooled maybe 7psi,
i should be around 500 to 515, im not greedy
i don't need a billion horses, i would be very
happy with just 500.
all i want is 500 hp to the wheels,
build the motor right, 8 psi intercooled maybe 7psi,
i should be around 500 to 515, im not greedy
i don't need a billion horses, i would be very
happy with just 500.
Please????Trending Topics
May 22, 2007 | 06:35 AM
#8
On The Tree
Joined: Feb 2006
Posts: 178
Likes: 0
From: Indianapolis
A turbo will double an engine's naturally aspirated horsepower roughly every 15 psi of intercooled boost. It's roughly every 18 psi for a supercharger to do the same. These are rules of thumb and are obviously different if you go to either extreme of compressor efficiency.
So, 10 psi of intercooled turbo boost provides about a 66% increase in naturally aspirated power.
The "intercooled" part is critical because it eliminates the adiabatic (or enthalpic) efficiency component, which can really confuse the issue.
So, 10 psi of intercooled turbo boost provides about a 66% increase in naturally aspirated power.
The "intercooled" part is critical because it eliminates the adiabatic (or enthalpic) efficiency component, which can really confuse the issue.
May 22, 2007 | 07:09 AM
#9
GFYS and STFU
iTrader: (8)
Joined: Jan 2007
Posts: 13,870
Likes: 4
From: Here and sometimes there too.
Originally Posted by FMOS Racing
A turbo will double an engine's naturally aspirated horsepower roughly every 15 psi of intercooled boost. It's roughly every 18 psi for a supercharger to do the same. These are rules of thumb and are obviously different if you go to either extreme of compressor efficiency.
So, 10 psi of intercooled turbo boost provides about a 66% increase in naturally aspirated power.
The "intercooled" part is critical because it eliminates the adiabatic (or enthalpic) efficiency component, which can really confuse the issue.
So, 10 psi of intercooled turbo boost provides about a 66% increase in naturally aspirated power.
The "intercooled" part is critical because it eliminates the adiabatic (or enthalpic) efficiency component, which can really confuse the issue.
Question: What cfm or air flow would relate to doubling an engines power output. 15psi on a stock engine and 15psi on an engine built to breath are gonna give two very different results.
Assuming that 15 psi on stock configuration is equal to 8 psi on a built motor. The best unit of measurement would be cfm right, since that wouldn't change. I realize that this was a rule of thumb, Parish has close to tripled his engine output at 22 psi and just trying to figure out how much air is need to flow throught the pump(motor) to make that happen.
May 22, 2007 | 08:57 AM
#10
