Ok here goes. The question at hand is would a sheetmetal intake manifold change it's power curve depending on the displacment of an engine?

To put it in plain terms (comparisons)

Scanerio (A) you have a well built 2.0 L engine with an evo3 turbo and a magnus sheet matel intake manifold. This intake shows it's greatest gains from 6000 till well past the 8000 mark.

Would this change if scanerio (A) was a 2.3 L well built engine with the same turbo and modifications. Would the sheet metal intake show it's greatest gains sooner because of displacement or would it still hold the same peak power from 6000 and on?

Please elaborate.

If no one else replies, contact Mangus. They would have tested their smim on both types of motors.

Brian

Well to be honest with you this boils down every sheetmetal intake manifold ,the reason I used the magnus one is because im familiar with it .


Again this was directed to elaborate on how a smim would be affected by the addition of displacment.

I'll talk to marco tomorow and post his commenbts.

The 2.3 with all other variables being the same,would make power sooner.

Just look at it in terms of airflow numbers, the 2.3l is injesting a lot more air. If you calculated out the exact ammount of air is was injesting (greater than a 2.0l) and got a rough V(E) for the engine, you could extrapolate the airflow data on hals manifold comparison down to a corresponding RPM on the 2.3l so you could see where the airflow drops off. In theory, the airflow curve shape should be the same for both engines, Just the 2.3l will hit those airflow numbers much sooner (lower RPM). Basically just shift all the graphs down a little in the RPMs

I believe we're on the same page ,but how much sooner in the rpm range would that be?

I realize different variables would have to be taken into consideration like cams what size turbo and so forth. If I where to hypothosize id have to say that we would not only see the numbers shift down the rpm range but view different spikes in those ranges in comparison toa 2L motor.

I havent called yet but when I get the chance I'll ask marco and post.

If I remember correctly, and all other things being equal, the flow of air into an engine is proportional to the size of the engine. If you are seeing the flow max out @ 6000 RPM in a 2.0L then you should be seeing the same @ about 5200 RPM in a 2.3L. The intake can flow only so much air at any pressure.

That RPM value is not certain, just an educated guess.


Good Luck