arrangement for the v 8 engine is the present invention is thus readily adaptable to present day engines particularly v 8 engines the entire assembly of valves 30 and control arms 40 can be provided as a unit fitted to the space between and spacing of the valve lifters much of the conduit 28 can be built into this subassembly the compressor can easily be mounted on an appropriate bracket and belt driven from the engine in the same manner as an alternator air conditioning compressor or power steering pump the necessary connections to and from the compressor as previously described can be made with flexible tubing or conduit appropriate to a particular installation in the particular engine illustrated the intake valves close at 70 u00b0 atdc this is typical of modern engine design although it is understood there may be some variation the important feature is that the intake valve has closed and the piston is completing or has completed its intake stroke when air or gas under pressure is introduced to the cylinder through the pipe 25 the incoming air or gas enters below the tdc position of the piston and mixes with the previously inducted charge it would appear that the portion of the inducted fuel air charge in the lower portion of the cylinder is thus caused to become a leaner mixture while the fuel air ratio of the charge at the top of the cylinder particularly in the region of the spark plug remains essentially at the ratio of the inducted charge the engine does not exhibit any tendency to misfire indicating that the fuel air ratio around the spark plug is adequate.