383lt1

how is 100% volumetric efficienty obtained

treyZ28

with a lot of experience and knowlege...or just boost.

mr2guru

iTrader: (16)

With the right port velocity, the right cam overlap, and everything else.... >100% can be achieved N/A.

soundengineer

iTrader: (16)

you can achieve it on a stock ls1 cam with just intake changes and some good exhaust...

J-Rod

The right question is how is 127% achieved (like the Pro Stockers get)...

treyZ28

Lots of racecars top 127. Isn't F1 getting close to 200?

mr2guru

iTrader: (16)

By creating enough port velocity that the air will cram itself in even after the cyl is full......

mr2guru

iTrader: (16)

yep.... it's pretty amazing that they can make >900hp with 3.0L NA on basically pump gas.

treyZ28

its amazing what a few billion dollars can produce, isnt it

gun5l1ng3r

Is it really pump gas? I would figure the octane would be a lot higher

Old SStroker

F1 BMEP @ power peak is excellent but not really better than ProStock. So F1 is getting similar VE to PS.

FWIW, mr2guru, calculate the torque/cubic inch @ hp peak for :

1) 3.0L(183 cubic inches) V10 with 950 hp @18,500

2) 500 cubic inch V8 with 1400 hp @ 9500

F1 petrol is near pump gas as far as octane, but it has many differences. It's also different for each team.

Armageddon

iTrader: (41)

Creating a Venturi Speeds up air creating a low pressure area. Same principle as a carb. Apply that to port velocity and wallah!