Air Intake CFM? (1 Viewer)

[womacje]

For a stock motor 1FZ, no turbos or SC's, how much CFM does the motor need?

I'm trying to figure out what the CFM draw is to convince myself with data that I need to replace my 7" Donaldson precleaner with a 10".

Anyone have a link to this data?

Thanks

 

[ppc]

Should be able to roughly calculate that figure for a given RPM. It is a 4.5L displacement engine. Convert that to to cubic ft and multiply by RPM.

 

[womacje]

Should be able to roughly calculate that figure for a given RPM. It is a 4.5L displacement engine. Convert that to to cubic ft and multiply by RPM.

Using that formula, I got 0.1589cubic feet * 2200rpm = 349.58CFM

2200 chosen for cruising rpm.

According to this link: Donaldson Full View Pre-Cleaner
The 10" wouldn't even flow enough CFM, not to mention the turbulance arguement that others have mentioned with these precleaners at highway speeds.

Am I doing this right?

Thanks for the help.

 

[Tools R Us]

Using that formula, I got 0.1589cubic feet * 2200rpm = 349.58CFM

2200 chosen for cruising rpm.
...

It is a 4 stroke, so that would be correct for 4400 rpm.

 

[ppc]

I guess my girlfriend wasn’t lying about having to sleep with my physics professor to get me a passing grade after all.

 

[womacje]

It is a 4 stroke, so that would be correct for 4400 rpm.

That makes me feel better. Thanks.

 

[womacje]

I guess my girlfriend wasn’t lying about having to sleep with my physics professor to get me a passing grade after all.

Haha! That's rough! She sounds like a keeper.

 

[yoopercharged]

I guess my girlfriend wasn’t lying about having to sleep with my physics professor to get me a passing grade after all.

Was that you!! You need to come get her back. She won't leave.

 

[ppc]

Was that you!! You need to come get her back. She won't leave.

You touched her last, she's yours now! :whoops: