Questions about air

[KingStromba]

1. What is the minimum / optimum diameter of pipe necessary to flow air to a F7R with say 185-190 BHP running at maximum revs? (assuming air is already passed a filter)

2. What is the relationship between length of this pipe from throttle body to filter, and performance? (ie does a long pipe with IK on the end reduce power and a shorter one increase it?)

3. What is the flow rate of air into said 190 BHP engine? (to work out how quickly down a pipe of a certain diameter will the air travel)

4. What is the relationship between air temp and BHP gain? (ie how much does temp have to drop to gain 1 BHP?) (is this realtionship linear or parabolic?)



Cheers

[jaspa]

1. ?

2. ??

3. ???

4. ????

Have you gone mod crazy ? :shock: :shock:

[BenR]

1. What is the minimum / optimum diameter of pipe necessary to flow air to a F7R with say 185-190 BHP running at maximum revs? (assuming air is already passed a filter)

2. What is the relationship between length of this pipe from throttle body to filter, and performance? (ie does a long pipe with IK on the end reduce power and a shorter one increase it?)

3. What is the flow rate of air into said 190 BHP engine? (to work out how quickly down a pipe of a certain diameter will the air travel)

4. What is the relationship between air temp and BHP gain? (ie how much does temp have to drop to gain 1 BHP?) (is this realtionship linear or parabolic?)



Cheers

1. Minimum about 50-52mm, optimum about 60-62 (more than enough for 220-230bhp).

2. Relationship is only on placement of TB and air filter (if air filter presents a restrictive factor) and the transient response. Static outputs wont be altered unless pipe entry is inefficient or pipe convolution brings in too many pressure drops, velocity drops and possibly seperation.

3. Some of my flow/engine data, VE is actually around the 95% region

Performance Potential At Est HP Peak: 6700 (Hyd lifter pump-up)
Torque, Ft Lbs 146 Horsepower 186
Air Flow, CFM 248 Volumetric Eff, % 105
Fuel Flow, lb/hr 91.1 Piston Speed, Ft/Min 4087

4. The relationship is in the increase of density and the increased rate of processing of o2. Density is higher on colder air (about 1% per 3 deg drop) and can carry more o2 to run with more fuel, which is where the power comes from.

[KingStromba]

Air needed is 2 litres per second then (roughly)

[Mark_Ritchspeed]

See, now youve got Ben talking all kinds of crap that no-one understands. :roll:

My answers to the questions are:

1.Bog off
2.Suck my testicles
3.**** knows
4.Read 1,2 and 3 .


:shock:

[KingStromba]

1. Stella
2. Stella
3. Stones
4. Stella

[Mark_Ritchspeed]

Hey, to my knowledge I havent had any Stones tonight. :shock:

[big hp]

Pah..... he's been on the cooking sherry Stromba.

[Lunner]

apparently a longer pipe increases torue, there was a guy posting on CS, selling BMC's iirc and they deleloped a kit for a punto whihc had a 1 mtr hose on it to give optimum torque