487X vs. 487 vs 993 SBC Cylinder Heads

Mike Taylor 3601 · 01-29-2015, 02:17 PM

The flow bench doesn't tell the whole story,but is pretty good start, myself I have checked 882,624 for 350's 450,416 for 305's 743 for 4.3 and by flow numbers are almost identical.
.450'' lift is highest lift went to these were junkyard heads cleaned and checked,we checked a dozen or more 882, have checked close to that many 450,416 ,have only checked a couple 624 and 4.3 heads.
165-175cfm @25'' around .400 lift
Mike Taylor 3601

01-29-2015, 02:17 PM	#4
Mike Taylor 3601 VIP Member Join Date: Oct 2008 Location: Somerset,Ky Posts: 1,372 Likes: 357 Liked 308 Times in 103 Posts	Re: 487X vs. 487 vs 993 SBC Cylinder Heads The flow bench doesn't tell the whole story,but is pretty good start, myself I have checked 882,624 for 350's 450,416 for 305's 743 for 4.3 and by flow numbers are almost identical. .450'' lift is highest lift went to these were junkyard heads cleaned and checked,we checked a dozen or more 882, have checked close to that many 450,416 ,have only checked a couple 624 and 4.3 heads. 165-175cfm @25'' around .400 lift Mike Taylor 3601