The other day I saw some electric "supercharger" things on ebay and they supposedly boost your intake pressure by ~1 psi, or so, they run for about $400. Being a really cheap person, I considered the following idea: take a little $30 shop vac and a $70 700 watt inverter and make a homebrew supercharger. Could this possibly work, folks?
A 1.5 peak hp shop vac (electrical rating of 5.75A x 120V = 690 W), moves about 120 cfm according to:
http://www.shopvac-canada.com/products/301/30101.htm
(We can probably assume this cfm figure is peak air movement across no intake-exhaust pressure difference.)
A 2 litre engine draws in 1 litre per cycle since half the pistons in the engine are always exhaling, while half are inhaling. So at 4000 rpm:
4000 liters/min = 141 cfm
These numbers are on the same order 120 cfm ~ 141 cfm, so the the shop vac engine may boost airflow considerably.
It would be quite tricky to get it all working, and the inverter would probably blow if it was run for more than a minute at a time. (You would have to install a button inside to manually switch the motor on/off) But I think this would make a great project if somebody is really into tinkering.
A 1.5 peak hp shop vac (electrical rating of 5.75A x 120V = 690 W), moves about 120 cfm according to:
http://www.shopvac-canada.com/products/301/30101.htm
(We can probably assume this cfm figure is peak air movement across no intake-exhaust pressure difference.)
A 2 litre engine draws in 1 litre per cycle since half the pistons in the engine are always exhaling, while half are inhaling. So at 4000 rpm:
4000 liters/min = 141 cfm
These numbers are on the same order 120 cfm ~ 141 cfm, so the the shop vac engine may boost airflow considerably.
It would be quite tricky to get it all working, and the inverter would probably blow if it was run for more than a minute at a time. (You would have to install a button inside to manually switch the motor on/off) But I think this would make a great project if somebody is really into tinkering.
