Join Date: Mar 2001
Location: Tucson, AZ, USA
<BLOCKQUOTE>quote:</font><HR>Originally posted by ss283:
hey yaw..back again...anybody have a set of 3917291 2.02 valve camel hump heads? i do and they are probably going on my 383 that i am building, with performer rpm and headers. i have heard they make decent power, and seen they were listed as one of castings available on the 68-69 302 (the article said because of large port volumes). if anybody has these heads or any info on them, please share i was just wondering how well they run.<HR></BLOCKQUOTE>
These are good heads and is the good chamber shape..BUT these heads don't flow well and will hurt the HP...the only thing these heads have good id the chambers.. With poting and some polioshing these heads can be made to flow repectably...
A stock 291 casting will low about 178cfm ..
in comparison a smog large chamber 76cc head flows about 186cfm... When the 291 is modified with 3 angle seats and opening up the small side radii while blending, cleaning the bowls and polishing ...you can get the intake to flow about 210cfm...and the exhaust up to 172cfm..all this is @ .5" lift...
You can polish the chambers to help dissipate the heat quicker , thus helping reduce detonation...especually if your running 10:1 on pump gas with iron heads..
All this can buy you significant HP ...