Surge tank design on a 1-cyl 450cc
Surge tank design on a 1-cyl 450cc
(OP)
I'm designing an intake for a single cyl 450 cc kawasaki motor. Need some clarification of the placement of certain areas of the intake pipe. What I'm thinking is run a bellmouth intake ontop of throttle body, tapers down to class mandated restrictor, peice of straight pipe (1.5" diameter-same as intake port), surge tank (looks like a spun metallic cat almost), to a peice of pipe that connects to the intake port.
Do I include surge tank length in the calculated intake runner length (19.8 inches for 2nd pressure wave)?
Do I include surge tank length in the calculated intake runner length (19.8 inches for 2nd pressure wave)?





RE: Surge tank design on a 1-cyl 450cc
Snorkel with a bellmouth going down to the diameter of the restrictor (configuration not unlike the stock air intake), stock airbox (or if you insist on making one, make it as large as possible), velocity stack with a bellmouth intake going into the stock throttle body and stock throttle body connector and stock intake ports.
Your "surge tank" will probably look to the intake system like a far-too-small "airbox".
RE: Surge tank design on a 1-cyl 450cc
No the airbox/plenum/surge-tank is not included in the tuned length. Air velocity in a plenum is approximated as zero. Nor should you include the length of pipe from plenum to atmosphere since this is assumed to be steady flow.
Engineering is the art of creating things you need, from things you can get.
RE: Surge tank design on a 1-cyl 450cc