Single Plane, Dual Plane and Kegger... MPI
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Rookie
Joined: Nov 2010
Posts: 92
Likes: 1
From: Vancouver BC
Single Plane, Dual Plane and Kegger... MPI
There are all sorts of intakes you can buy for carborated motors. Single and dual plane and hi-rise. Ive noticed that there are a couple that you can also buy for the MPI Mopar engines. One that i saw looked like your basic edelbrock single plane intake, another, the mopar m1 looked like a basic high rise intake, then there is the stock keg.
Isnt all this stuff pointless because the point behide changing the length and size of the intake runners is to allow the fuel and air to mix before it gets to the cylenders?
So my question is, why would you change your intake on a MPI engine. the fuel and air dosnt mix until it is just about to enter the cylinder????
Isnt all this stuff pointless because the point behide changing the length and size of the intake runners is to allow the fuel and air to mix before it gets to the cylenders?
So my question is, why would you change your intake on a MPI engine. the fuel and air dosnt mix until it is just about to enter the cylinder????
Champion
Joined: Jun 2004
Posts: 2,811
Likes: 2
From: Ft Campbell, KY/TN
the kegger has a high volume of hot air inside it. The aftermarket intakes have runners that are not in direct contact with the bottom plenum, thus not absorbing as much heat from the lifter valley (from the crankcase).
So you get slightly cooler air, and the runners can be bigger and matched better to the heads. YOu also get better AIRFLOW over the stock kegger.
More airflow, the more fuel is injected. More air and more fuel = more power.
Just don't get a throttle body spacer for the reasons you just said. THey only wirk for TBI or carb engines.
So you get slightly cooler air, and the runners can be bigger and matched better to the heads. YOu also get better AIRFLOW over the stock kegger.
More airflow, the more fuel is injected. More air and more fuel = more power.
Just don't get a throttle body spacer for the reasons you just said. THey only wirk for TBI or carb engines.
Grand Champion
Joined: Apr 2010
Posts: 5,011
Likes: 6
From: Meeker, CO
First: Ignore the previous disinformational post.
Now: The factory designed everything about the engine to produce power in the powerband (RPM range) they thought most of their customers were most interested in. If your needs vary from their assumptions, you might want to change your intake (and exhaust, and maybe other things) to suit. Precisely where the fuel enters the air stream is mostly irrelevant as long as you understand how it affects what happens when the mixture enters the combustion chamber.
Now: The factory designed everything about the engine to produce power in the powerband (RPM range) they thought most of their customers were most interested in. If your needs vary from their assumptions, you might want to change your intake (and exhaust, and maybe other things) to suit. Precisely where the fuel enters the air stream is mostly irrelevant as long as you understand how it affects what happens when the mixture enters the combustion chamber.
Banned
Joined: Jul 2010
Posts: 123
Likes: 1
First: Ignore the previous disinformational post.
Now: The factory designed everything about the engine to produce power in the powerband (RPM range) they thought most of their customers were most interested in. If your needs vary from their assumptions, you might want to change your intake (and exhaust, and maybe other things) to suit. Precisely where the fuel enters the air stream is mostly irrelevant as long as you understand how it affects what happens when the mixture enters the combustion chamber.
Now: The factory designed everything about the engine to produce power in the powerband (RPM range) they thought most of their customers were most interested in. If your needs vary from their assumptions, you might want to change your intake (and exhaust, and maybe other things) to suit. Precisely where the fuel enters the air stream is mostly irrelevant as long as you understand how it affects what happens when the mixture enters the combustion chamber.
Administrator
Joined: Apr 2010
Posts: 87,403
Likes: 4,214
From: Clayton MI
Runner length determines at what RPM range you make your power. Doesn't matter where the fuel is added.
Kegger: Good bottom end. (long runners) Loses it up top.
Dual Plane: Not as good on the bottom, good midrange, not as bad as the kegger up top.
Single Plane: Poor bottom end, reasonable midrange, good top end.
Kegger: Good bottom end. (long runners) Loses it up top.
Dual Plane: Not as good on the bottom, good midrange, not as bad as the kegger up top.
Single Plane: Poor bottom end, reasonable midrange, good top end.
All Star
Joined: Jan 2009
Posts: 907
Likes: 2
From: Corrales, New Mecico
Yup what HeyYou said...And
Modded Kegger: Looses a little on the bottom, but not as much as an M1, better on the top end than stock.
These are truck motors, and IMO, the stock Kegger is the best for low end torque.
Modded Kegger: Looses a little on the bottom, but not as much as an M1, better on the top end than stock.
These are truck motors, and IMO, the stock Kegger is the best for low end torque.