Small Block Head Flow Chart

The TFs are a street head, but there's no middle ground between them and the Indys or Victors

Click to expand...

IMO, the middle ground between the std rocker gear heads, and the really high end heads are the Indy 360-2’s.

Indy 360-2 cnc230(oval port)-

Used head(but cleaned), Indy 2.10/1.65 valves(back cut on both), and what I believe is the valve job as delivered from Indy.

Tested in December 2015.

4.00” bore, 28” test pressure, no tube on exhaust:

Lift—— I/E
.100— 67.2/57.1
.200—136.0/111.4
.300—202.0/150.6
.400—259.6/174.4
.500—296.7/185.4
.550—305.0/188.6
.600—312.6/192.8
.650—319.4/196.0
.700—321.3/198.4
.750—315.6/201.3