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 !!!!!!!!!