showdog75

iTrader: (8)

This reminds me of a old Reher/Morrison read about cylinder heads. They had two pair of identical flowing pro stock big block chevy heads one pair made a 100hp more than the other identical flowing pair. Head porting is somewhat of a black voodoo.

zzracer

iTrader: (33)

I don't know what my heads flow but they are 799s I had ls3 light factory valves turned down to 2.05s installed and a good valve job and factory exhaust valves. I ported them. I know I pulled them after dynoed my car and just opened the chambers to unshroud the valves and re dynoed my car on the same Dyno and gained 16 hp from that. From what I've tested there are big gains in mid lift numbers just form working the valve seats. My car made 492 rwhp on ls2 bottom end so they do descent just didn't have this set flowed.

bortous

Does anyone know what is going on with TEA's website?
It's not working.
It keeps saying there is no such name or directory.

G Atsma

I found the same thing.

bortous

Ok.
Technical fault maybe.

JRFed

Correct you can expect 8-10cfm on a 4.000 bore

SoCalDave

I recommend you leave the cumbustion chambers untouched and focus on the throat, the rocker stud boss, the valve guide boss, and the pushrod pinchpoint. Only the pushrod pinchpoint might leave you scratching your head. Those things will get your heads to flow.