4A Heads Work in progress

STOCK 4 A's
  FLOW #'s

 SEAT work on Kwik Way 020    
     Seat and Guide Machine   

J&S Stage II
  FLOW #'s
           lift   int.            ex.
        .100   56.7            43.9
        .200  117.4          82.8
        .300  160.3        102.6
        .400  184.8        110.9
        .500  190.6        115.4
        .600  194.8        119.1             
                Avg. flow #'s
    int. 150.7    ex. 82.1
      lift         int.            ex
     .100      70.2         55.5    
     .200      134.4      102.6                         
      .300      180.3      129.8                         
      .400      219.6      149.2                         
      .500      235.7      156.8                         
      .600      237.2      163.8                         
           AVG. flow #'s                                   
         int.179.5        Ex. 108.2

S/S High performance
Valves - 2.07 x 1.625

Machine work in progress-New exhaust seats with a
1.500 ID .notice the amount of material needing to be
machined from the stock ex. bowls!!!
The before and after #'s show Almost 50 CFM
increase on BOTH intake and exhaust ports
       Stock  4A  bowls
Will NOT move enough air to
help performance !!!!!!!!!