Posted By: Anonymous
stealth head flow #'s - 05/19/08 12:18 AM
anybody flowed a set of stealth heads yet?
i got 300cfm int & 231cfm ex at .700 lift
on a 1020 superflow.
i got 300cfm int & 231cfm ex at .700 lift
on a 1020 superflow.
stealth head flow #'s
Posted By: Anonymous
Re: stealth head flow #'s - 05/19/08 12:46 AM
forgot to add that these #'s are for a stock
entrance and it was flowed on a 4.500 bore
stand.
entrance and it was flowed on a 4.500 bore
stand.
Posted By: DaytonaTurbo
Re: stealth head flow #'s - 05/19/08 02:50 AM
Dwayne, aka fast68plymouth flowed the stealth heads, here's what he got, and compared them to E-rpm heads he flowed as well:
Quote:
4.375 bore, 28" test pressure, radius plate on intake, no tube on exhaust:
average flow for #5 and #7 cylinder
lift----I/E
.100--63.8/49.0
.200-140.5/104.1
.300-207.8/139.7
.400-239.2/164.6
.450-248.1/172.5
.500-256.1/177.8
.550-261.5/182.6
.600-265.3/188.2
.650-267.3/191.5
.700-267.3/195.8
here is an OOTB E head i tested recently, also the average for a left and right cylinder:
lift----I/E
.100--66.1/50.8
.200-138.3/105.4
.300-203.8/140.5
.400-243.1/163.6
.450-258.0/170.4
.500-265.7/178.6
.550-272.3/185.3
.600-276.5/190.3
.650-276.1/194.6
.700-275.7/197.3
Posted By: ct71rr
Re: stealth head flow #'s - 05/19/08 06:53 PM
Do you know factory head flow numbers? I just got my stealth heads last week. I'm a bit of an ignoramus when it comes to understanding flow numbers. I was looking for an inexpensive aluminum head to save weight and gain some performance. Do the stealths do that (please god, tell me they do)?
Posted By: dogdays
Re: stealth head flow #'s - 05/19/08 07:09 PM
Factory heads max out on flow somewhere around 0.400" lift and at 28" depression they flow between 220 and 228 cfm. On a V8 engine max horsepower is roughly 2 hp per cfm of port flow so you see the 440Source heads can support about 75 more horsepower than an unported stock set. Plus they (as well as most aftermarket heads) have a better combustion chamber than the OEM open chamber heads.
R.
R.
Posted By: ct71rr
Re: stealth head flow #'s - 05/20/08 02:14 PM
Thanks for the info Dogdays 
!!
!!