prom holders

bruce plecan nacelp at bright.net
Sat Jan 10 17:49:14 GMT 1998


Carl:  
  Some points of information:
     The GN/GNX/TTA/  MAF sensors max out at 250 grams/sec, which is
about 500 CFM.
     A stout GN 231 can run off the top of this calibration at 3000 rpm
    The only cure is having the calibration rich enough so as you go over
top, that there is enough fuel for WOT, max rpm.  Lots of 10sec cars 
have been run in this manner.
    As far as limiting Air Flow everone has their own opinion,  Cottrell
over at TPIS with a stout SBC, shows a couple HP difference from
MAP to MAF, nothing ground shaking.
    IMHO lots of folks run to much overlap, and if they try to run a limited
amount of timing the intake valve has opened enough that some of the
charge may be burnt with the valve open.  If you keep the advance to 
about the valve open point you're OK.  Which is why I think so many
people like the Ruggles 3371, which is a -6d overlap cam.
     Jus some stuff to consider.
  Bruce



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