Holy cow!!
Instructor
Joined: Mar 2002
Posts: 239
Likes: 0
From: Fredericksburg VA
Re: Holy cow!! (ski_dwn_it)
If you are looking for a way to rough-in the throttle body or carburetor size, you can use these equations for performance applications:
CFM=1.7xHP for carbureted applications
CFM=2.0xHP for port fuel injected applications
Mass air flow shows up as engine power, so engine size and RPM and VE aren't needed in these approximate equations.
CFM=1.7xHP for carbureted applications
CFM=2.0xHP for port fuel injected applications
Mass air flow shows up as engine power, so engine size and RPM and VE aren't needed in these approximate equations.
Melting Slicks
Joined: Oct 2002
Posts: 3,193
Likes: 1
From: Cincinnati Oh
Re: Holy cow!! (ski_dwn_it)
Raman,
I would not draw that conclusion, IN FACT, I would say that for 95% of the setups here 58mm is more than enough.
I would not draw that conclusion, IN FACT, I would say that for 95% of the setups here 58mm is more than enough.
With my heads, cam, stroker and SR setup I imagine a 52mm will pay off then. :yesnod:
Drifting
Joined: Mar 1999
Posts: 1,931
Likes: 1
From: Norcross GA
Re: Holy cow!! (Ramanstud)
I consider the calculations to be a good place to start. They would tell the story if the engine were pumping fluid instead of a gas. i.e Fluids don't compress, (w/o a phase change), gases do,... passing thru tubes, blades, obstructions, etc.
I don't consider VE's to be something you can calculate ahead of time. It usually comes into play, "as a result of". Put another way,... use a combo that works well together. The final part of this usually comes down to, "give it a try". (Just like tuning.)
Just my $.02
Jesse, I'm surprise you picked up as much as you did. i.e. I would have bet (heavy) against that mod. Good find.
I don't consider VE's to be something you can calculate ahead of time. It usually comes into play, "as a result of". Put another way,... use a combo that works well together. The final part of this usually comes down to, "give it a try". (Just like tuning.)
Just my $.02
Jesse, I'm surprise you picked up as much as you did. i.e. I would have bet (heavy) against that mod. Good find.
