335 HP 396 290 Head Casting Build & Dyno Test

Tim H · 05-19-2024, 11:32 AM

Chev V8 Big Block Cylnder Head 3964290 Small plug Flow Data - unported
Data Source Int/Ex Valve .100 .200 .300 .400 .500 .600
Chevy 290 Oval Port Iron CHP 01
253.0 / 112.0 cc's, Exhaust = No Pipe 2.065"/1.725" 60/47 122/88 172/113 214/133 244/152 256/161
Chevy 290 Oval Port Iron CHP 02
253.0 / 112.0 cc's, Exhaust = Pipe 2.065"/1.725" 60/47 122/90 172/118 214/138 244/160 256/174
Special thanks to Stan Weiss for supplying data. This is only a small detail of information available on his website. It is worth the time to dig into his stuff at

05-19-2024, 11:32 AM	#4
Tim H VIP Member Join Date: Jan 2007 Posts: 1,041 Likes: 1,071 Liked 481 Times in 158 Posts	Re: 335 HP 396 290 Head Casting Build & Dyno Test Chev V8 Big Block Cylnder Head 3964290 Small plug Flow Data - unported Data Source Int/Ex Valve .100 .200 .300 .400 .500 .600 Chevy 290 Oval Port Iron CHP 01 253.0 / 112.0 cc's, Exhaust = No Pipe 2.065"/1.725" 60/47 122/88 172/113 214/133 244/152 256/161 Chevy 290 Oval Port Iron CHP 02 253.0 / 112.0 cc's, Exhaust = Pipe 2.065"/1.725" 60/47 122/90 172/118 214/138 244/160 256/174 Special thanks to Stan Weiss for supplying data. This is only a small detail of information available on his website. It is worth the time to dig into his stuff at